dep: Add glslang

dep/glslang/glslang/MachineIndependent/InfoSink.cpp

@@ -0,0 +1,113 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+#include "../Include/InfoSink.h"
+
+#include <cstring>
+
+namespace glslang {
+
+void TInfoSinkBase::append(const char* s)
+{
+    if (outputStream & EString) {
+        if (s == nullptr)
+            sink.append("(null)");
+        else {
+            checkMem(strlen(s));
+            sink.append(s);
+        }
+    }
+
+//#ifdef _WIN32
+//    if (outputStream & EDebugger)
+//        OutputDebugString(s);
+//#endif
+
+    if (outputStream & EStdOut)
+        fprintf(stdout, "%s", s);
+}
+
+void TInfoSinkBase::append(int count, char c)
+{
+    if (outputStream & EString) {
+        checkMem(count);
+        sink.append(count, c);
+    }
+
+//#ifdef _WIN32
+//    if (outputStream & EDebugger) {
+//        char str[2];
+//        str[0] = c;
+//        str[1] = '\0';
+//        OutputDebugString(str);
+//    }
+//#endif
+
+    if (outputStream & EStdOut)
+        fprintf(stdout, "%c", c);
+}
+
+void TInfoSinkBase::append(const TPersistString& t)
+{
+    if (outputStream & EString) {
+        checkMem(t.size());
+        sink.append(t);
+    }
+
+//#ifdef _WIN32
+//    if (outputStream & EDebugger)
+//        OutputDebugString(t.c_str());
+//#endif
+
+    if (outputStream & EStdOut)
+        fprintf(stdout, "%s", t.c_str());
+}
+
+void TInfoSinkBase::append(const TString& t)
+{
+    if (outputStream & EString) {
+        checkMem(t.size());
+        sink.append(t.c_str());
+    }
+
+//#ifdef _WIN32
+//    if (outputStream & EDebugger)
+//        OutputDebugString(t.c_str());
+//#endif
+
+    if (outputStream & EStdOut)
+        fprintf(stdout, "%s", t.c_str());
+}
+
+} // end namespace glslang

dep/glslang/glslang/MachineIndependent/Initialize.h

@@ -0,0 +1,112 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// Copyright (C) 2013-2016 LunarG, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+#ifndef _INITIALIZE_INCLUDED_
+#define _INITIALIZE_INCLUDED_
+
+#include "../Include/ResourceLimits.h"
+#include "../Include/Common.h"
+#include "../Include/ShHandle.h"
+#include "SymbolTable.h"
+#include "Versions.h"
+
+namespace glslang {
+
+//
+// This is made to hold parseable strings for almost all the built-in
+// functions and variables for one specific combination of version
+// and profile.  (Some still need to be added programmatically.)
+// This is a base class for language-specific derivations, which
+// can be used for language independent builtins.
+//
+// The strings are organized by
+//    commonBuiltins:  intersection of all stages' built-ins, processed just once
+//    stageBuiltins[]: anything a stage needs that's not in commonBuiltins
+//
+class TBuiltInParseables {
+public:
+    POOL_ALLOCATOR_NEW_DELETE(GetThreadPoolAllocator())
+    TBuiltInParseables();
+    virtual ~TBuiltInParseables();
+    virtual void initialize(int version, EProfile, const SpvVersion& spvVersion) = 0;
+    virtual void initialize(const TBuiltInResource& resources, int version, EProfile, const SpvVersion& spvVersion, EShLanguage) = 0;
+    virtual const TString& getCommonString() const { return commonBuiltins; }
+    virtual const TString& getStageString(EShLanguage language) const { return stageBuiltins[language]; }
+
+    virtual void identifyBuiltIns(int version, EProfile profile, const SpvVersion& spvVersion, EShLanguage language, TSymbolTable& symbolTable) = 0;
+    virtual void identifyBuiltIns(int version, EProfile profile, const SpvVersion& spvVersion, EShLanguage language, TSymbolTable& symbolTable, const TBuiltInResource &resources) = 0;
+
+protected:
+    TString commonBuiltins;
+    TString stageBuiltins[EShLangCount];
+};
+
+//
+// This is a GLSL specific derivation of TBuiltInParseables.  To present a stable
+// interface and match other similar code, it is called TBuiltIns, rather
+// than TBuiltInParseablesGlsl.
+//
+class TBuiltIns : public TBuiltInParseables {
+public:
+    POOL_ALLOCATOR_NEW_DELETE(GetThreadPoolAllocator())
+    TBuiltIns();
+    virtual ~TBuiltIns();
+    void initialize(int version, EProfile, const SpvVersion& spvVersion);
+    void initialize(const TBuiltInResource& resources, int version, EProfile, const SpvVersion& spvVersion, EShLanguage);
+
+    void identifyBuiltIns(int version, EProfile profile, const SpvVersion& spvVersion, EShLanguage language, TSymbolTable& symbolTable);
+    void identifyBuiltIns(int version, EProfile profile, const SpvVersion& spvVersion, EShLanguage language, TSymbolTable& symbolTable, const TBuiltInResource &resources);
+
+protected:
+    void addTabledBuiltins(int version, EProfile profile, const SpvVersion& spvVersion);
+    void relateTabledBuiltins(int version, EProfile profile, const SpvVersion& spvVersion, EShLanguage, TSymbolTable&);
+    void add2ndGenerationSamplingImaging(int version, EProfile profile, const SpvVersion& spvVersion);
+    void addSubpassSampling(TSampler, const TString& typeName, int version, EProfile profile);
+    void addQueryFunctions(TSampler, const TString& typeName, int version, EProfile profile);
+    void addImageFunctions(TSampler, const TString& typeName, int version, EProfile profile);
+    void addSamplingFunctions(TSampler, const TString& typeName, int version, EProfile profile);
+    void addGatherFunctions(TSampler, const TString& typeName, int version, EProfile profile);
+
+    // Helpers for making textual representations of the permutations
+    // of texturing/imaging functions.
+    const char* postfixes[5];
+    const char* prefixes[EbtNumTypes];
+    int dimMap[EsdNumDims];
+};
+
+} // end namespace glslang
+
+#endif // _INITIALIZE_INCLUDED_

dep/glslang/glslang/MachineIndependent/IntermTraverse.cpp

@@ -0,0 +1,302 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// Copyright (C) 2013 LunarG, Inc.
+// Copyright (c) 2002-2010 The ANGLE Project Authors.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+#include "../Include/intermediate.h"
+
+namespace glslang {
+
+//
+// Traverse the intermediate representation tree, and
+// call a node type specific function for each node.
+// Done recursively through the member function Traverse().
+// Node types can be skipped if their function to call is 0,
+// but their subtree will still be traversed.
+// Nodes with children can have their whole subtree skipped
+// if preVisit is turned on and the type specific function
+// returns false.
+//
+// preVisit, postVisit, and rightToLeft control what order
+// nodes are visited in.
+//
+
+//
+// Traversal functions for terminals are straightforward....
+//
+void TIntermMethod::traverse(TIntermTraverser*)
+{
+    // Tree should always resolve all methods as a non-method.
+}
+
+void TIntermSymbol::traverse(TIntermTraverser *it)
+{
+    it->visitSymbol(this);
+}
+
+void TIntermConstantUnion::traverse(TIntermTraverser *it)
+{
+    it->visitConstantUnion(this);
+}
+
+//
+// Traverse a binary node.
+//
+void TIntermBinary::traverse(TIntermTraverser *it)
+{
+    bool visit = true;
+
+    //
+    // visit the node before children if pre-visiting.
+    //
+    if (it->preVisit)
+        visit = it->visitBinary(EvPreVisit, this);
+
+    //
+    // Visit the children, in the right order.
+    //
+    if (visit) {
+        it->incrementDepth(this);
+
+        if (it->rightToLeft) {
+            if (right)
+                right->traverse(it);
+
+            if (it->inVisit)
+                visit = it->visitBinary(EvInVisit, this);
+
+            if (visit && left)
+                left->traverse(it);
+        } else {
+            if (left)
+                left->traverse(it);
+
+            if (it->inVisit)
+                visit = it->visitBinary(EvInVisit, this);
+
+            if (visit && right)
+                right->traverse(it);
+        }
+
+        it->decrementDepth();
+    }
+
+    //
+    // Visit the node after the children, if requested and the traversal
+    // hasn't been canceled yet.
+    //
+    if (visit && it->postVisit)
+        it->visitBinary(EvPostVisit, this);
+}
+
+//
+// Traverse a unary node.  Same comments in binary node apply here.
+//
+void TIntermUnary::traverse(TIntermTraverser *it)
+{
+    bool visit = true;
+
+    if (it->preVisit)
+        visit = it->visitUnary(EvPreVisit, this);
+
+    if (visit) {
+        it->incrementDepth(this);
+        operand->traverse(it);
+        it->decrementDepth();
+    }
+
+    if (visit && it->postVisit)
+        it->visitUnary(EvPostVisit, this);
+}
+
+//
+// Traverse an aggregate node.  Same comments in binary node apply here.
+//
+void TIntermAggregate::traverse(TIntermTraverser *it)
+{
+    bool visit = true;
+
+    if (it->preVisit)
+        visit = it->visitAggregate(EvPreVisit, this);
+
+    if (visit) {
+        it->incrementDepth(this);
+
+        if (it->rightToLeft) {
+            for (TIntermSequence::reverse_iterator sit = sequence.rbegin(); sit != sequence.rend(); sit++) {
+                (*sit)->traverse(it);
+
+                if (visit && it->inVisit) {
+                    if (*sit != sequence.front())
+                        visit = it->visitAggregate(EvInVisit, this);
+                }
+            }
+        } else {
+            for (TIntermSequence::iterator sit = sequence.begin(); sit != sequence.end(); sit++) {
+                (*sit)->traverse(it);
+
+                if (visit && it->inVisit) {
+                    if (*sit != sequence.back())
+                        visit = it->visitAggregate(EvInVisit, this);
+                }
+            }
+        }
+
+        it->decrementDepth();
+    }
+
+    if (visit && it->postVisit)
+        it->visitAggregate(EvPostVisit, this);
+}
+
+//
+// Traverse a selection node.  Same comments in binary node apply here.
+//
+void TIntermSelection::traverse(TIntermTraverser *it)
+{
+    bool visit = true;
+
+    if (it->preVisit)
+        visit = it->visitSelection(EvPreVisit, this);
+
+    if (visit) {
+        it->incrementDepth(this);
+        if (it->rightToLeft) {
+            if (falseBlock)
+                falseBlock->traverse(it);
+            if (trueBlock)
+                trueBlock->traverse(it);
+            condition->traverse(it);
+        } else {
+            condition->traverse(it);
+            if (trueBlock)
+                trueBlock->traverse(it);
+            if (falseBlock)
+                falseBlock->traverse(it);
+        }
+        it->decrementDepth();
+    }
+
+    if (visit && it->postVisit)
+        it->visitSelection(EvPostVisit, this);
+}
+
+//
+// Traverse a loop node.  Same comments in binary node apply here.
+//
+void TIntermLoop::traverse(TIntermTraverser *it)
+{
+    bool visit = true;
+
+    if (it->preVisit)
+        visit = it->visitLoop(EvPreVisit, this);
+
+    if (visit) {
+        it->incrementDepth(this);
+
+        if (it->rightToLeft) {
+            if (terminal)
+                terminal->traverse(it);
+
+            if (body)
+                body->traverse(it);
+
+            if (test)
+                test->traverse(it);
+        } else {
+            if (test)
+                test->traverse(it);
+
+            if (body)
+                body->traverse(it);
+
+            if (terminal)
+                terminal->traverse(it);
+        }
+
+        it->decrementDepth();
+    }
+
+    if (visit && it->postVisit)
+        it->visitLoop(EvPostVisit, this);
+}
+
+//
+// Traverse a branch node.  Same comments in binary node apply here.
+//
+void TIntermBranch::traverse(TIntermTraverser *it)
+{
+    bool visit = true;
+
+    if (it->preVisit)
+        visit = it->visitBranch(EvPreVisit, this);
+
+    if (visit && expression) {
+        it->incrementDepth(this);
+        expression->traverse(it);
+        it->decrementDepth();
+    }
+
+    if (visit && it->postVisit)
+        it->visitBranch(EvPostVisit, this);
+}
+
+//
+// Traverse a switch node.
+//
+void TIntermSwitch::traverse(TIntermTraverser* it)
+{
+    bool visit = true;
+
+    if (it->preVisit)
+        visit = it->visitSwitch(EvPreVisit, this);
+
+    if (visit) {
+        it->incrementDepth(this);
+        if (it->rightToLeft) {
+            body->traverse(it);
+            condition->traverse(it);
+        } else {
+            condition->traverse(it);
+            body->traverse(it);
+        }
+        it->decrementDepth();
+    }
+
+    if (visit && it->postVisit)
+        it->visitSwitch(EvPostVisit, this);
+}
+
+} // end namespace glslang

dep/glslang/glslang/MachineIndependent/LiveTraverser.h

@@ -0,0 +1,138 @@
+//
+// Copyright (C) 2016 LunarG, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+#pragma once
+
+#include "../Include/Common.h"
+#include "reflection.h"
+#include "localintermediate.h"
+
+#include "gl_types.h"
+
+#include <list>
+#include <unordered_set>
+
+namespace glslang {
+
+//
+// The traverser: mostly pass through, except
+//  - processing function-call nodes to push live functions onto the stack of functions to process
+//  - processing selection nodes to trim semantically dead code
+//
+// This is in the glslang namespace directly so it can be a friend of TReflection.
+// This can be derived from to implement reflection database traversers or
+// binding mappers: anything that wants to traverse the live subset of the tree.
+//
+
+class TLiveTraverser : public TIntermTraverser {
+public:
+    TLiveTraverser(const TIntermediate& i, bool traverseAll = false,
+                   bool preVisit = true, bool inVisit = false, bool postVisit = false) :
+        TIntermTraverser(preVisit, inVisit, postVisit),
+        intermediate(i), traverseAll(traverseAll)
+    { }
+
+    //
+    // Given a function name, find its subroot in the tree, and push it onto the stack of
+    // functions left to process.
+    //
+    void pushFunction(const TString& name)
+    {
+        TIntermSequence& globals = intermediate.getTreeRoot()->getAsAggregate()->getSequence();
+        for (unsigned int f = 0; f < globals.size(); ++f) {
+            TIntermAggregate* candidate = globals[f]->getAsAggregate();
+            if (candidate && candidate->getOp() == EOpFunction && candidate->getName() == name) {
+                functions.push_back(candidate);
+                break;
+            }
+        }
+    }
+
+    typedef std::list<TIntermAggregate*> TFunctionStack;
+    TFunctionStack functions;
+
+protected:
+    // To catch which function calls are not dead, and hence which functions must be visited.
+    virtual bool visitAggregate(TVisit, TIntermAggregate* node)
+    {
+        if (!traverseAll)
+            if (node->getOp() == EOpFunctionCall)
+                addFunctionCall(node);
+
+        return true; // traverse this subtree
+    }
+
+    // To prune semantically dead paths.
+    virtual bool visitSelection(TVisit /* visit */,  TIntermSelection* node)
+    {
+        if (traverseAll)
+            return true; // traverse all code
+
+        TIntermConstantUnion* constant = node->getCondition()->getAsConstantUnion();
+        if (constant) {
+            // cull the path that is dead
+            if (constant->getConstArray()[0].getBConst() == true && node->getTrueBlock())
+                node->getTrueBlock()->traverse(this);
+            if (constant->getConstArray()[0].getBConst() == false && node->getFalseBlock())
+                node->getFalseBlock()->traverse(this);
+
+            return false; // don't traverse any more, we did it all above
+        } else
+            return true; // traverse the whole subtree
+    }
+
+    // Track live functions as well as uniforms, so that we don't visit dead functions
+    // and only visit each function once.
+    void addFunctionCall(TIntermAggregate* call)
+    {
+        // // just use the map to ensure we process each function at most once
+        if (liveFunctions.find(call->getName()) == liveFunctions.end()) {
+            liveFunctions.insert(call->getName());
+            pushFunction(call->getName());
+        }
+    }
+
+    const TIntermediate& intermediate;
+    typedef std::unordered_set<TString> TLiveFunctions;
+    TLiveFunctions liveFunctions;
+    bool traverseAll;
+
+private:
+    // prevent copy & copy construct
+    TLiveTraverser(TLiveTraverser&);
+    TLiveTraverser& operator=(TLiveTraverser&);
+};
+
+} // namespace glslang

dep/glslang/glslang/MachineIndependent/ParseContextBase.cpp

@@ -0,0 +1,641 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// Copyright (C) 2016 Google, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+// Implement the TParseContextBase class.
+
+#include <cstdarg>
+
+#include "ParseHelper.h"
+
+extern int yyparse(glslang::TParseContext*);
+
+namespace glslang {
+
+//
+// Used to output syntax, parsing, and semantic errors.
+//
+
+void TParseContextBase::outputMessage(const TSourceLoc& loc, const char* szReason,
+                                      const char* szToken,
+                                      const char* szExtraInfoFormat,
+                                      TPrefixType prefix, va_list args)
+{
+    const int maxSize = MaxTokenLength + 200;
+    char szExtraInfo[maxSize];
+
+    safe_vsprintf(szExtraInfo, maxSize, szExtraInfoFormat, args);
+
+    infoSink.info.prefix(prefix);
+    infoSink.info.location(loc);
+    infoSink.info << "'" << szToken <<  "' : " << szReason << " " << szExtraInfo << "\n";
+
+    if (prefix == EPrefixError) {
+        ++numErrors;
+    }
+}
+
+#if !defined(GLSLANG_WEB) || defined(GLSLANG_WEB_DEVEL)
+
+void C_DECL TParseContextBase::error(const TSourceLoc& loc, const char* szReason, const char* szToken,
+                                     const char* szExtraInfoFormat, ...)
+{
+    if (messages & EShMsgOnlyPreprocessor)
+        return;
+    va_list args;
+    va_start(args, szExtraInfoFormat);
+    outputMessage(loc, szReason, szToken, szExtraInfoFormat, EPrefixError, args);
+    va_end(args);
+
+    if ((messages & EShMsgCascadingErrors) == 0)
+        currentScanner->setEndOfInput();
+}
+
+void C_DECL TParseContextBase::warn(const TSourceLoc& loc, const char* szReason, const char* szToken,
+                                    const char* szExtraInfoFormat, ...)
+{
+    if (suppressWarnings())
+        return;
+    va_list args;
+    va_start(args, szExtraInfoFormat);
+    outputMessage(loc, szReason, szToken, szExtraInfoFormat, EPrefixWarning, args);
+    va_end(args);
+}
+
+void C_DECL TParseContextBase::ppError(const TSourceLoc& loc, const char* szReason, const char* szToken,
+                                       const char* szExtraInfoFormat, ...)
+{
+    va_list args;
+    va_start(args, szExtraInfoFormat);
+    outputMessage(loc, szReason, szToken, szExtraInfoFormat, EPrefixError, args);
+    va_end(args);
+
+    if ((messages & EShMsgCascadingErrors) == 0)
+        currentScanner->setEndOfInput();
+}
+
+void C_DECL TParseContextBase::ppWarn(const TSourceLoc& loc, const char* szReason, const char* szToken,
+                                      const char* szExtraInfoFormat, ...)
+{
+    va_list args;
+    va_start(args, szExtraInfoFormat);
+    outputMessage(loc, szReason, szToken, szExtraInfoFormat, EPrefixWarning, args);
+    va_end(args);
+}
+
+#endif
+
+//
+// Both test and if necessary, spit out an error, to see if the node is really
+// an l-value that can be operated on this way.
+//
+// Returns true if there was an error.
+//
+bool TParseContextBase::lValueErrorCheck(const TSourceLoc& loc, const char* op, TIntermTyped* node)
+{
+    TIntermBinary* binaryNode = node->getAsBinaryNode();
+
+    if (binaryNode) {
+        switch(binaryNode->getOp()) {
+        case EOpIndexDirect:
+        case EOpIndexIndirect:     // fall through
+        case EOpIndexDirectStruct: // fall through
+        case EOpVectorSwizzle:
+        case EOpMatrixSwizzle:
+            return lValueErrorCheck(loc, op, binaryNode->getLeft());
+        default:
+            break;
+        }
+        error(loc, " l-value required", op, "", "");
+
+        return true;
+    }
+
+    const char* symbol = nullptr;
+    TIntermSymbol* symNode = node->getAsSymbolNode();
+    if (symNode != nullptr)
+        symbol = symNode->getName().c_str();
+
+    const char* message = nullptr;
+    switch (node->getQualifier().storage) {
+    case EvqConst:          message = "can't modify a const";        break;
+    case EvqConstReadOnly:  message = "can't modify a const";        break;
+    case EvqUniform:        message = "can't modify a uniform";      break;
+#ifndef GLSLANG_WEB
+    case EvqBuffer:
+        if (node->getQualifier().isReadOnly())
+            message = "can't modify a readonly buffer";
+        if (node->getQualifier().isShaderRecord())
+            message = "can't modify a shaderrecordnv qualified buffer";
+        break;
+    case EvqHitAttr:
+        if (language != EShLangIntersect)
+            message = "cannot modify hitAttributeNV in this stage";
+        break;
+#endif
+
+    default:
+        //
+        // Type that can't be written to?
+        //
+        switch (node->getBasicType()) {
+        case EbtSampler:
+            message = "can't modify a sampler";
+            break;
+        case EbtVoid:
+            message = "can't modify void";
+            break;
+#ifndef GLSLANG_WEB
+        case EbtAtomicUint:
+            message = "can't modify an atomic_uint";
+            break;
+        case EbtAccStruct:
+            message = "can't modify accelerationStructureNV";
+            break;
+        case EbtRayQuery:
+            message = "can't modify rayQueryEXT";
+            break;
+#endif
+        default:
+            break;
+        }
+    }
+
+    if (message == nullptr && binaryNode == nullptr && symNode == nullptr) {
+        error(loc, " l-value required", op, "", "");
+
+        return true;
+    }
+
+    //
+    // Everything else is okay, no error.
+    //
+    if (message == nullptr)
+        return false;
+
+    //
+    // If we get here, we have an error and a message.
+    //
+    if (symNode)
+        error(loc, " l-value required", op, "\"%s\" (%s)", symbol, message);
+    else
+        error(loc, " l-value required", op, "(%s)", message);
+
+    return true;
+}
+
+// Test for and give an error if the node can't be read from.
+void TParseContextBase::rValueErrorCheck(const TSourceLoc& loc, const char* op, TIntermTyped* node)
+{
+    if (! node)
+        return;
+
+    TIntermBinary* binaryNode = node->getAsBinaryNode();
+    if (binaryNode) {
+        switch(binaryNode->getOp()) {
+        case EOpIndexDirect:
+        case EOpIndexIndirect:
+        case EOpIndexDirectStruct:
+        case EOpVectorSwizzle:
+        case EOpMatrixSwizzle:
+            rValueErrorCheck(loc, op, binaryNode->getLeft());
+        default:
+            break;
+        }
+
+        return;
+    }
+
+    TIntermSymbol* symNode = node->getAsSymbolNode();
+    if (symNode && symNode->getQualifier().isWriteOnly())
+        error(loc, "can't read from writeonly object: ", op, symNode->getName().c_str());
+}
+
+// Add 'symbol' to the list of deferred linkage symbols, which
+// are later processed in finish(), at which point the symbol
+// must still be valid.
+// It is okay if the symbol's type will be subsequently edited;
+// the modifications will be tracked.
+// Order is preserved, to avoid creating novel forward references.
+void TParseContextBase::trackLinkage(TSymbol& symbol)
+{
+    if (!parsingBuiltins)
+        linkageSymbols.push_back(&symbol);
+}
+
+// Ensure index is in bounds, correct if necessary.
+// Give an error if not.
+void TParseContextBase::checkIndex(const TSourceLoc& loc, const TType& type, int& index)
+{
+    const auto sizeIsSpecializationExpression = [&type]() {
+        return type.containsSpecializationSize() &&
+               type.getArraySizes()->getOuterNode() != nullptr &&
+               type.getArraySizes()->getOuterNode()->getAsSymbolNode() == nullptr; };
+
+    if (index < 0) {
+        error(loc, "", "[", "index out of range '%d'", index);
+        index = 0;
+    } else if (type.isArray()) {
+        if (type.isSizedArray() && !sizeIsSpecializationExpression() &&
+            index >= type.getOuterArraySize()) {
+            error(loc, "", "[", "array index out of range '%d'", index);
+            index = type.getOuterArraySize() - 1;
+        }
+    } else if (type.isVector()) {
+        if (index >= type.getVectorSize()) {
+            error(loc, "", "[", "vector index out of range '%d'", index);
+            index = type.getVectorSize() - 1;
+        }
+    } else if (type.isMatrix()) {
+        if (index >= type.getMatrixCols()) {
+            error(loc, "", "[", "matrix index out of range '%d'", index);
+            index = type.getMatrixCols() - 1;
+        }
+    }
+}
+
+// Make a shared symbol have a non-shared version that can be edited by the current
+// compile, such that editing its type will not change the shared version and will
+// effect all nodes already sharing it (non-shallow type),
+// or adopting its full type after being edited (shallow type).
+void TParseContextBase::makeEditable(TSymbol*& symbol)
+{
+    // copyUp() does a deep copy of the type.
+    symbol = symbolTable.copyUp(symbol);
+
+    // Save it (deferred, so it can be edited first) in the AST for linker use.
+    if (symbol)
+        trackLinkage(*symbol);
+}
+
+// Return a writable version of the variable 'name'.
+//
+// Return nullptr if 'name' is not found.  This should mean
+// something is seriously wrong (e.g., compiler asking self for
+// built-in that doesn't exist).
+TVariable* TParseContextBase::getEditableVariable(const char* name)
+{
+    bool builtIn;
+    TSymbol* symbol = symbolTable.find(name, &builtIn);
+
+    assert(symbol != nullptr);
+    if (symbol == nullptr)
+        return nullptr;
+
+    if (builtIn)
+        makeEditable(symbol);
+
+    return symbol->getAsVariable();
+}
+
+// Select the best matching function for 'call' from 'candidateList'.
+//
+// Assumptions
+//
+// There is no exact match, so a selection algorithm needs to run. That is, the
+// language-specific handler should check for exact match first, to
+// decide what to do, before calling this selector.
+//
+// Input
+//
+//  * list of candidate signatures to select from
+//  * the call
+//  * a predicate function convertible(from, to) that says whether or not type
+//    'from' can implicitly convert to type 'to' (it includes the case of what
+//    the calling language would consider a matching type with no conversion
+//    needed)
+//  * a predicate function better(from1, from2, to1, to2) that says whether or
+//    not a conversion from <-> to2 is considered better than a conversion
+//    from <-> to1 (both in and out directions need testing, as declared by the
+//    formal parameter)
+//
+// Output
+//
+//  * best matching candidate (or none, if no viable candidates found)
+//  * whether there was a tie for the best match (ambiguous overload selection,
+//    caller's choice for how to report)
+//
+const TFunction* TParseContextBase::selectFunction(
+    const TVector<const TFunction*> candidateList,
+    const TFunction& call,
+    std::function<bool(const TType& from, const TType& to, TOperator op, int arg)> convertible,
+    std::function<bool(const TType& from, const TType& to1, const TType& to2)> better,
+    /* output */ bool& tie)
+{
+//
+// Operation
+//
+// 1. Prune the input list of candidates down to a list of viable candidates,
+// where each viable candidate has
+//
+//  * at least as many parameters as there are calling arguments, with any
+//    remaining parameters being optional or having default values
+//  * each parameter is true under convertible(A, B), where A is the calling
+//    type for in and B is the formal type, and in addition, for out B is the
+//    calling type and A is the formal type
+//
+// 2. If there are no viable candidates, return with no match.
+//
+// 3. If there is only one viable candidate, it is the best match.
+//
+// 4. If there are multiple viable candidates, select the first viable candidate
+// as the incumbent. Compare the incumbent to the next viable candidate, and if
+// that candidate is better (bullets below), make it the incumbent. Repeat, with
+// a linear walk through the viable candidate list. The final incumbent will be
+// returned as the best match. A viable candidate is better than the incumbent if
+//
+//  * it has a function argument with a better(...) conversion than the incumbent,
+//    for all directions needed by in and out
+//  * the incumbent has no argument with a better(...) conversion then the
+//    candidate, for either in or out (as needed)
+//
+// 5. Check for ambiguity by comparing the best match against all other viable
+// candidates. If any other viable candidate has a function argument with a
+// better(...) conversion than the best candidate (for either in or out
+// directions), return that there was a tie for best.
+//
+
+    tie = false;
+
+    // 1. prune to viable...
+    TVector<const TFunction*> viableCandidates;
+    for (auto it = candidateList.begin(); it != candidateList.end(); ++it) {
+        const TFunction& candidate = *(*it);
+
+        // to even be a potential match, number of arguments must be >= the number of
+        // fixed (non-default) parameters, and <= the total (including parameter with defaults).
+        if (call.getParamCount() < candidate.getFixedParamCount() ||
+            call.getParamCount() > candidate.getParamCount())
+            continue;
+
+        // see if arguments are convertible
+        bool viable = true;
+
+        // The call can have fewer parameters than the candidate, if some have defaults.
+        const int paramCount = std::min(call.getParamCount(), candidate.getParamCount());
+        for (int param = 0; param < paramCount; ++param) {
+            if (candidate[param].type->getQualifier().isParamInput()) {
+                if (! convertible(*call[param].type, *candidate[param].type, candidate.getBuiltInOp(), param)) {
+                    viable = false;
+                    break;
+                }
+            }
+            if (candidate[param].type->getQualifier().isParamOutput()) {
+                if (! convertible(*candidate[param].type, *call[param].type, candidate.getBuiltInOp(), param)) {
+                    viable = false;
+                    break;
+                }
+            }
+        }
+
+        if (viable)
+            viableCandidates.push_back(&candidate);
+    }
+
+    // 2. none viable...
+    if (viableCandidates.size() == 0)
+        return nullptr;
+
+    // 3. only one viable...
+    if (viableCandidates.size() == 1)
+        return viableCandidates.front();
+
+    // 4. find best...
+    const auto betterParam = [&call, &better](const TFunction& can1, const TFunction& can2) -> bool {
+        // is call -> can2 better than call -> can1 for any parameter
+        bool hasBetterParam = false;
+        for (int param = 0; param < call.getParamCount(); ++param) {
+            if (better(*call[param].type, *can1[param].type, *can2[param].type)) {
+                hasBetterParam = true;
+                break;
+            }
+        }
+        return hasBetterParam;
+    };
+
+    const auto equivalentParams = [&call, &better](const TFunction& can1, const TFunction& can2) -> bool {
+        // is call -> can2 equivalent to call -> can1 for all the call parameters?
+        for (int param = 0; param < call.getParamCount(); ++param) {
+            if (better(*call[param].type, *can1[param].type, *can2[param].type) ||
+                better(*call[param].type, *can2[param].type, *can1[param].type))
+                return false;
+        }
+        return true;
+    };
+
+    const TFunction* incumbent = viableCandidates.front();
+    for (auto it = viableCandidates.begin() + 1; it != viableCandidates.end(); ++it) {
+        const TFunction& candidate = *(*it);
+        if (betterParam(*incumbent, candidate) && ! betterParam(candidate, *incumbent))
+            incumbent = &candidate;
+    }
+
+    // 5. ambiguity...
+    for (auto it = viableCandidates.begin(); it != viableCandidates.end(); ++it) {
+        if (incumbent == *it)
+            continue;
+        const TFunction& candidate = *(*it);
+
+        // In the case of default parameters, it may have an identical initial set, which is
+        // also ambiguous
+        if (betterParam(*incumbent, candidate) || equivalentParams(*incumbent, candidate))
+            tie = true;
+    }
+
+    return incumbent;
+}
+
+//
+// Look at a '.' field selector string and change it into numerical selectors
+// for a vector or scalar.
+//
+// Always return some form of swizzle, so the result is always usable.
+//
+void TParseContextBase::parseSwizzleSelector(const TSourceLoc& loc, const TString& compString, int vecSize,
+                                             TSwizzleSelectors<TVectorSelector>& selector)
+{
+    // Too long?
+    if (compString.size() > MaxSwizzleSelectors)
+        error(loc, "vector swizzle too long", compString.c_str(), "");
+
+    // Use this to test that all swizzle characters are from the same swizzle-namespace-set
+    enum {
+        exyzw,
+        ergba,
+        estpq,
+    } fieldSet[MaxSwizzleSelectors];
+
+    // Decode the swizzle string.
+    int size = std::min(MaxSwizzleSelectors, (int)compString.size());
+    for (int i = 0; i < size; ++i) {
+        switch (compString[i])  {
+        case 'x':
+            selector.push_back(0);
+            fieldSet[i] = exyzw;
+            break;
+        case 'r':
+            selector.push_back(0);
+            fieldSet[i] = ergba;
+            break;
+        case 's':
+            selector.push_back(0);
+            fieldSet[i] = estpq;
+            break;
+
+        case 'y':
+            selector.push_back(1);
+            fieldSet[i] = exyzw;
+            break;
+        case 'g':
+            selector.push_back(1);
+            fieldSet[i] = ergba;
+            break;
+        case 't':
+            selector.push_back(1);
+            fieldSet[i] = estpq;
+            break;
+
+        case 'z':
+            selector.push_back(2);
+            fieldSet[i] = exyzw;
+            break;
+        case 'b':
+            selector.push_back(2);
+            fieldSet[i] = ergba;
+            break;
+        case 'p':
+            selector.push_back(2);
+            fieldSet[i] = estpq;
+            break;
+
+        case 'w':
+            selector.push_back(3);
+            fieldSet[i] = exyzw;
+            break;
+        case 'a':
+            selector.push_back(3);
+            fieldSet[i] = ergba;
+            break;
+        case 'q':
+            selector.push_back(3);
+            fieldSet[i] = estpq;
+            break;
+
+        default:
+            error(loc, "unknown swizzle selection", compString.c_str(), "");
+            break;
+        }
+    }
+
+    // Additional error checking.
+    for (int i = 0; i < selector.size(); ++i) {
+        if (selector[i] >= vecSize) {
+            error(loc, "vector swizzle selection out of range",  compString.c_str(), "");
+            selector.resize(i);
+            break;
+        }
+
+        if (i > 0 && fieldSet[i] != fieldSet[i-1]) {
+            error(loc, "vector swizzle selectors not from the same set", compString.c_str(), "");
+            selector.resize(i);
+            break;
+        }
+    }
+
+    // Ensure it is valid.
+    if (selector.size() == 0)
+        selector.push_back(0);
+}
+
+#ifdef ENABLE_HLSL
+//
+// Make the passed-in variable information become a member of the
+// global uniform block.  If this doesn't exist yet, make it.
+//
+void TParseContextBase::growGlobalUniformBlock(const TSourceLoc& loc, TType& memberType, const TString& memberName, TTypeList* typeList)
+{
+    // Make the global block, if not yet made.
+    if (globalUniformBlock == nullptr) {
+        TQualifier blockQualifier;
+        blockQualifier.clear();
+        blockQualifier.storage = EvqUniform;
+        TType blockType(new TTypeList, *NewPoolTString(getGlobalUniformBlockName()), blockQualifier);
+        setUniformBlockDefaults(blockType);
+        globalUniformBlock = new TVariable(NewPoolTString(""), blockType, true);
+        firstNewMember = 0;
+    }
+
+    // Update with binding and set
+    globalUniformBlock->getWritableType().getQualifier().layoutBinding = globalUniformBinding;
+    globalUniformBlock->getWritableType().getQualifier().layoutSet = globalUniformSet;
+
+    // Add the requested member as a member to the global block.
+    TType* type = new TType;
+    type->shallowCopy(memberType);
+    type->setFieldName(memberName);
+    if (typeList)
+        type->setStruct(typeList);
+    TTypeLoc typeLoc = {type, loc};
+    globalUniformBlock->getType().getWritableStruct()->push_back(typeLoc);
+
+    // Insert into the symbol table.
+    if (firstNewMember == 0) {
+        // This is the first request; we need a normal symbol table insert
+        if (symbolTable.insert(*globalUniformBlock))
+            trackLinkage(*globalUniformBlock);
+        else
+            error(loc, "failed to insert the global constant buffer", "uniform", "");
+    } else {
+        // This is a follow-on request; we need to amend the first insert
+        symbolTable.amend(*globalUniformBlock, firstNewMember);
+    }
+
+    ++firstNewMember;
+}
+#endif
+
+void TParseContextBase::finish()
+{
+    if (parsingBuiltins)
+        return;
+
+    // Transfer the linkage symbols to AST nodes, preserving order.
+    TIntermAggregate* linkage = new TIntermAggregate;
+    for (auto i = linkageSymbols.begin(); i != linkageSymbols.end(); ++i)
+        intermediate.addSymbolLinkageNode(linkage, **i);
+    intermediate.addSymbolLinkageNodes(linkage, getLanguage(), symbolTable);
+}
+
+} // end namespace glslang

dep/glslang/glslang/MachineIndependent/ParseHelper.h

@@ -0,0 +1,532 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// Copyright (C) 2012-2013 LunarG, Inc.
+// Copyright (C) 2015-2018 Google, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+//
+// This header defines a two-level parse-helper hierarchy, derived from
+// TParseVersions:
+//  - TParseContextBase:  sharable across multiple parsers
+//  - TParseContext:      GLSL specific helper
+//
+
+#ifndef _PARSER_HELPER_INCLUDED_
+#define _PARSER_HELPER_INCLUDED_
+
+#include <cstdarg>
+#include <functional>
+
+#include "parseVersions.h"
+#include "../Include/ShHandle.h"
+#include "SymbolTable.h"
+#include "localintermediate.h"
+#include "Scan.h"
+#include "attribute.h"
+
+namespace glslang {
+
+struct TPragma {
+    TPragma(bool o, bool d) : optimize(o), debug(d) { }
+    bool optimize;
+    bool debug;
+    TPragmaTable pragmaTable;
+};
+
+class TScanContext;
+class TPpContext;
+
+typedef std::set<int> TIdSetType;
+typedef std::map<const TTypeList*, std::map<size_t, const TTypeList*>> TStructRecord;
+
+//
+// Sharable code (as well as what's in TParseVersions) across
+// parse helpers.
+//
+class TParseContextBase : public TParseVersions {
+public:
+    TParseContextBase(TSymbolTable& symbolTable, TIntermediate& interm, bool parsingBuiltins, int version,
+                      EProfile profile, const SpvVersion& spvVersion, EShLanguage language,
+                      TInfoSink& infoSink, bool forwardCompatible, EShMessages messages,
+                      const TString* entryPoint = nullptr)
+          : TParseVersions(interm, version, profile, spvVersion, language, infoSink, forwardCompatible, messages),
+            scopeMangler("::"),
+            symbolTable(symbolTable),
+            statementNestingLevel(0), loopNestingLevel(0), structNestingLevel(0), controlFlowNestingLevel(0),
+            postEntryPointReturn(false),
+            contextPragma(true, false),
+            beginInvocationInterlockCount(0), endInvocationInterlockCount(0),
+            parsingBuiltins(parsingBuiltins), scanContext(nullptr), ppContext(nullptr),
+            limits(resources.limits),
+            globalUniformBlock(nullptr),
+            globalUniformBinding(TQualifier::layoutBindingEnd),
+            globalUniformSet(TQualifier::layoutSetEnd)
+    {
+        if (entryPoint != nullptr)
+            sourceEntryPointName = *entryPoint;
+    }
+    virtual ~TParseContextBase() { }
+
+#if !defined(GLSLANG_WEB) || defined(GLSLANG_WEB_DEVEL)
+    virtual void C_DECL   error(const TSourceLoc&, const char* szReason, const char* szToken,
+                                const char* szExtraInfoFormat, ...);
+    virtual void C_DECL    warn(const TSourceLoc&, const char* szReason, const char* szToken,
+                                const char* szExtraInfoFormat, ...);
+    virtual void C_DECL ppError(const TSourceLoc&, const char* szReason, const char* szToken,
+                                const char* szExtraInfoFormat, ...);
+    virtual void C_DECL  ppWarn(const TSourceLoc&, const char* szReason, const char* szToken,
+                                const char* szExtraInfoFormat, ...);
+#endif
+
+    virtual void setLimits(const TBuiltInResource&) = 0;
+
+    void checkIndex(const TSourceLoc&, const TType&, int& index);
+
+    EShLanguage getLanguage() const { return language; }
+    void setScanContext(TScanContext* c) { scanContext = c; }
+    TScanContext* getScanContext() const { return scanContext; }
+    void setPpContext(TPpContext* c) { ppContext = c; }
+    TPpContext* getPpContext() const { return ppContext; }
+
+    virtual void setLineCallback(const std::function<void(int, int, bool, int, const char*)>& func) { lineCallback = func; }
+    virtual void setExtensionCallback(const std::function<void(int, const char*, const char*)>& func) { extensionCallback = func; }
+    virtual void setVersionCallback(const std::function<void(int, int, const char*)>& func) { versionCallback = func; }
+    virtual void setPragmaCallback(const std::function<void(int, const TVector<TString>&)>& func) { pragmaCallback = func; }
+    virtual void setErrorCallback(const std::function<void(int, const char*)>& func) { errorCallback = func; }
+
+    virtual void reservedPpErrorCheck(const TSourceLoc&, const char* name, const char* op) = 0;
+    virtual bool lineContinuationCheck(const TSourceLoc&, bool endOfComment) = 0;
+    virtual bool lineDirectiveShouldSetNextLine() const = 0;
+    virtual void handlePragma(const TSourceLoc&, const TVector<TString>&) = 0;
+
+    virtual bool parseShaderStrings(TPpContext&, TInputScanner& input, bool versionWillBeError = false) = 0;
+
+    virtual void notifyVersion(int line, int version, const char* type_string)
+    {
+        if (versionCallback)
+            versionCallback(line, version, type_string);
+    }
+    virtual void notifyErrorDirective(int line, const char* error_message)
+    {
+        if (errorCallback)
+            errorCallback(line, error_message);
+    }
+    virtual void notifyLineDirective(int curLineNo, int newLineNo, bool hasSource, int sourceNum, const char* sourceName)
+    {
+        if (lineCallback)
+            lineCallback(curLineNo, newLineNo, hasSource, sourceNum, sourceName);
+    }
+    virtual void notifyExtensionDirective(int line, const char* extension, const char* behavior)
+    {
+        if (extensionCallback)
+            extensionCallback(line, extension, behavior);
+    }
+
+#ifdef ENABLE_HLSL
+    // Manage the global uniform block (default uniforms in GLSL, $Global in HLSL)
+    virtual void growGlobalUniformBlock(const TSourceLoc&, TType&, const TString& memberName, TTypeList* typeList = nullptr);
+#endif
+
+    // Potentially rename shader entry point function
+    void renameShaderFunction(TString*& name) const
+    {
+        // Replace the entry point name given in the shader with the real entry point name,
+        // if there is a substitution.
+        if (name != nullptr && *name == sourceEntryPointName && intermediate.getEntryPointName().size() > 0)
+            name = NewPoolTString(intermediate.getEntryPointName().c_str());
+    }
+
+    virtual bool lValueErrorCheck(const TSourceLoc&, const char* op, TIntermTyped*);
+    virtual void rValueErrorCheck(const TSourceLoc&, const char* op, TIntermTyped*);
+
+    const char* const scopeMangler;
+
+    // Basic parsing state, easily accessible to the grammar
+
+    TSymbolTable& symbolTable;        // symbol table that goes with the current language, version, and profile
+    int statementNestingLevel;        // 0 if outside all flow control or compound statements
+    int loopNestingLevel;             // 0 if outside all loops
+    int structNestingLevel;           // 0 if outside blocks and structures
+    int controlFlowNestingLevel;      // 0 if outside all flow control
+    const TType* currentFunctionType; // the return type of the function that's currently being parsed
+    bool functionReturnsValue;        // true if a non-void function has a return
+    // if inside a function, true if the function is the entry point and this is after a return statement
+    bool postEntryPointReturn;
+    // case, node, case, case, node, ...; ensure only one node between cases;   stack of them for nesting
+    TList<TIntermSequence*> switchSequenceStack;
+    // the statementNestingLevel the current switch statement is at, which must match the level of its case statements
+    TList<int> switchLevel;
+    struct TPragma contextPragma;
+    int beginInvocationInterlockCount;
+    int endInvocationInterlockCount;
+
+protected:
+    TParseContextBase(TParseContextBase&);
+    TParseContextBase& operator=(TParseContextBase&);
+
+    const bool parsingBuiltins;       // true if parsing built-in symbols/functions
+    TVector<TSymbol*> linkageSymbols; // will be transferred to 'linkage', after all editing is done, order preserving
+    TScanContext* scanContext;
+    TPpContext* ppContext;
+    TBuiltInResource resources;
+    TLimits& limits;
+    TString sourceEntryPointName;
+
+    // These, if set, will be called when a line, pragma ... is preprocessed.
+    // They will be called with any parameters to the original directive.
+    std::function<void(int, int, bool, int, const char*)> lineCallback;
+    std::function<void(int, const TVector<TString>&)> pragmaCallback;
+    std::function<void(int, int, const char*)> versionCallback;
+    std::function<void(int, const char*, const char*)> extensionCallback;
+    std::function<void(int, const char*)> errorCallback;
+
+    // see implementation for detail
+    const TFunction* selectFunction(const TVector<const TFunction*>, const TFunction&,
+        std::function<bool(const TType&, const TType&, TOperator, int arg)>,
+        std::function<bool(const TType&, const TType&, const TType&)>,
+        /* output */ bool& tie);
+
+    virtual void parseSwizzleSelector(const TSourceLoc&, const TString&, int size,
+                                      TSwizzleSelectors<TVectorSelector>&);
+
+    // Manage the global uniform block (default uniforms in GLSL, $Global in HLSL)
+    TVariable* globalUniformBlock;     // the actual block, inserted into the symbol table
+    unsigned int globalUniformBinding; // the block's binding number
+    unsigned int globalUniformSet;     // the block's set number
+    int firstNewMember;                // the index of the first member not yet inserted into the symbol table
+    // override this to set the language-specific name
+    virtual const char* getGlobalUniformBlockName() const { return ""; }
+    virtual void setUniformBlockDefaults(TType&) const { }
+    virtual void finalizeGlobalUniformBlockLayout(TVariable&) { }
+    virtual void outputMessage(const TSourceLoc&, const char* szReason, const char* szToken,
+                               const char* szExtraInfoFormat, TPrefixType prefix,
+                               va_list args);
+    virtual void trackLinkage(TSymbol& symbol);
+    virtual void makeEditable(TSymbol*&);
+    virtual TVariable* getEditableVariable(const char* name);
+    virtual void finish();
+};
+
+//
+// Manage the state for when to respect precision qualifiers and when to warn about
+// the defaults being different than might be expected.
+//
+class TPrecisionManager {
+public:
+    TPrecisionManager() : obey(false), warn(false), explicitIntDefault(false), explicitFloatDefault(false){ }
+    virtual ~TPrecisionManager() {}
+
+    void respectPrecisionQualifiers() { obey = true; }
+    bool respectingPrecisionQualifiers() const { return obey; }
+    bool shouldWarnAboutDefaults() const { return warn; }
+    void defaultWarningGiven() { warn = false; }
+    void warnAboutDefaults() { warn = true; }
+    void explicitIntDefaultSeen()
+    {
+        explicitIntDefault = true;
+        if (explicitFloatDefault)
+            warn = false;
+    }
+    void explicitFloatDefaultSeen()
+    {
+        explicitFloatDefault = true;
+        if (explicitIntDefault)
+            warn = false;
+    }
+
+protected:
+    bool obey;                  // respect precision qualifiers
+    bool warn;                  // need to give a warning about the defaults
+    bool explicitIntDefault;    // user set the default for int/uint
+    bool explicitFloatDefault;  // user set the default for float
+};
+
+//
+// GLSL-specific parse helper.  Should have GLSL in the name, but that's
+// too big of a change for comparing branches at the moment, and perhaps
+// impacts downstream consumers as well.
+//
+class TParseContext : public TParseContextBase {
+public:
+    TParseContext(TSymbolTable&, TIntermediate&, bool parsingBuiltins, int version, EProfile, const SpvVersion& spvVersion, EShLanguage, TInfoSink&,
+                  bool forwardCompatible = false, EShMessages messages = EShMsgDefault,
+                  const TString* entryPoint = nullptr);
+    virtual ~TParseContext();
+
+    bool obeyPrecisionQualifiers() const { return precisionManager.respectingPrecisionQualifiers(); }
+    void setPrecisionDefaults();
+
+    void setLimits(const TBuiltInResource&) override;
+    bool parseShaderStrings(TPpContext&, TInputScanner& input, bool versionWillBeError = false) override;
+    void parserError(const char* s);     // for bison's yyerror
+
+    void reservedErrorCheck(const TSourceLoc&, const TString&);
+    void reservedPpErrorCheck(const TSourceLoc&, const char* name, const char* op) override;
+    bool lineContinuationCheck(const TSourceLoc&, bool endOfComment) override;
+    bool lineDirectiveShouldSetNextLine() const override;
+    bool builtInName(const TString&);
+
+    void handlePragma(const TSourceLoc&, const TVector<TString>&) override;
+    TIntermTyped* handleVariable(const TSourceLoc&, TSymbol* symbol, const TString* string);
+    TIntermTyped* handleBracketDereference(const TSourceLoc&, TIntermTyped* base, TIntermTyped* index);
+    void handleIndexLimits(const TSourceLoc&, TIntermTyped* base, TIntermTyped* index);
+
+#ifndef GLSLANG_WEB
+    void makeEditable(TSymbol*&) override;
+    void ioArrayCheck(const TSourceLoc&, const TType&, const TString& identifier);
+#endif
+    bool isIoResizeArray(const TType&) const;
+    void fixIoArraySize(const TSourceLoc&, TType&);
+    void handleIoResizeArrayAccess(const TSourceLoc&, TIntermTyped* base);
+    void checkIoArraysConsistency(const TSourceLoc&, bool tailOnly = false);
+    int getIoArrayImplicitSize(const TQualifier&, TString* featureString = nullptr) const;
+    void checkIoArrayConsistency(const TSourceLoc&, int requiredSize, const char* feature, TType&, const TString&);
+
+    TIntermTyped* handleBinaryMath(const TSourceLoc&, const char* str, TOperator op, TIntermTyped* left, TIntermTyped* right);
+    TIntermTyped* handleUnaryMath(const TSourceLoc&, const char* str, TOperator op, TIntermTyped* childNode);
+    TIntermTyped* handleDotDereference(const TSourceLoc&, TIntermTyped* base, const TString& field);
+    TIntermTyped* handleDotSwizzle(const TSourceLoc&, TIntermTyped* base, const TString& field);
+    void blockMemberExtensionCheck(const TSourceLoc&, const TIntermTyped* base, int member, const TString& memberName);
+    TFunction* handleFunctionDeclarator(const TSourceLoc&, TFunction& function, bool prototype);
+    TIntermAggregate* handleFunctionDefinition(const TSourceLoc&, TFunction&);
+    TIntermTyped* handleFunctionCall(const TSourceLoc&, TFunction*, TIntermNode*);
+    TIntermTyped* handleBuiltInFunctionCall(TSourceLoc, TIntermNode* arguments, const TFunction& function);
+    void computeBuiltinPrecisions(TIntermTyped&, const TFunction&);
+    TIntermNode* handleReturnValue(const TSourceLoc&, TIntermTyped*);
+    void checkLocation(const TSourceLoc&, TOperator);
+    TIntermTyped* handleLengthMethod(const TSourceLoc&, TFunction*, TIntermNode*);
+    void addInputArgumentConversions(const TFunction&, TIntermNode*&) const;
+    TIntermTyped* addOutputArgumentConversions(const TFunction&, TIntermAggregate&) const;
+    void builtInOpCheck(const TSourceLoc&, const TFunction&, TIntermOperator&);
+    void nonOpBuiltInCheck(const TSourceLoc&, const TFunction&, TIntermAggregate&);
+    void userFunctionCallCheck(const TSourceLoc&, TIntermAggregate&);
+    void samplerConstructorLocationCheck(const TSourceLoc&, const char* token, TIntermNode*);
+    TFunction* handleConstructorCall(const TSourceLoc&, const TPublicType&);
+    void handlePrecisionQualifier(const TSourceLoc&, TQualifier&, TPrecisionQualifier);
+    void checkPrecisionQualifier(const TSourceLoc&, TPrecisionQualifier);
+    void memorySemanticsCheck(const TSourceLoc&, const TFunction&, const TIntermOperator& callNode);
+
+    void assignError(const TSourceLoc&, const char* op, TString left, TString right);
+    void unaryOpError(const TSourceLoc&, const char* op, TString operand);
+    void binaryOpError(const TSourceLoc&, const char* op, TString left, TString right);
+    void variableCheck(TIntermTyped*& nodePtr);
+    bool lValueErrorCheck(const TSourceLoc&, const char* op, TIntermTyped*) override;
+    void rValueErrorCheck(const TSourceLoc&, const char* op, TIntermTyped*) override;
+    void constantValueCheck(TIntermTyped* node, const char* token);
+    void integerCheck(const TIntermTyped* node, const char* token);
+    void globalCheck(const TSourceLoc&, const char* token);
+    bool constructorError(const TSourceLoc&, TIntermNode*, TFunction&, TOperator, TType&);
+    bool constructorTextureSamplerError(const TSourceLoc&, const TFunction&);
+    void arraySizeCheck(const TSourceLoc&, TIntermTyped* expr, TArraySize&, const char *sizeType);
+    bool arrayQualifierError(const TSourceLoc&, const TQualifier&);
+    bool arrayError(const TSourceLoc&, const TType&);
+    void arraySizeRequiredCheck(const TSourceLoc&, const TArraySizes&);
+    void structArrayCheck(const TSourceLoc&, const TType& structure);
+    void arraySizesCheck(const TSourceLoc&, const TQualifier&, TArraySizes*, const TIntermTyped* initializer, bool lastMember);
+    void arrayOfArrayVersionCheck(const TSourceLoc&, const TArraySizes*);
+    bool voidErrorCheck(const TSourceLoc&, const TString&, TBasicType);
+    void boolCheck(const TSourceLoc&, const TIntermTyped*);
+    void boolCheck(const TSourceLoc&, const TPublicType&);
+    void samplerCheck(const TSourceLoc&, const TType&, const TString& identifier, TIntermTyped* initializer);
+    void atomicUintCheck(const TSourceLoc&, const TType&, const TString& identifier);
+    void accStructCheck(const TSourceLoc & loc, const TType & type, const TString & identifier);
+    void transparentOpaqueCheck(const TSourceLoc&, const TType&, const TString& identifier);
+    void memberQualifierCheck(glslang::TPublicType&);
+    void globalQualifierFixCheck(const TSourceLoc&, TQualifier&);
+    void globalQualifierTypeCheck(const TSourceLoc&, const TQualifier&, const TPublicType&);
+    bool structQualifierErrorCheck(const TSourceLoc&, const TPublicType& pType);
+    void mergeQualifiers(const TSourceLoc&, TQualifier& dst, const TQualifier& src, bool force);
+    void setDefaultPrecision(const TSourceLoc&, TPublicType&, TPrecisionQualifier);
+    int computeSamplerTypeIndex(TSampler&);
+    TPrecisionQualifier getDefaultPrecision(TPublicType&);
+    void precisionQualifierCheck(const TSourceLoc&, TBasicType, TQualifier&);
+    void parameterTypeCheck(const TSourceLoc&, TStorageQualifier qualifier, const TType& type);
+    bool containsFieldWithBasicType(const TType& type ,TBasicType basicType);
+    TSymbol* redeclareBuiltinVariable(const TSourceLoc&, const TString&, const TQualifier&, const TShaderQualifiers&);
+    void redeclareBuiltinBlock(const TSourceLoc&, TTypeList& typeList, const TString& blockName, const TString* instanceName, TArraySizes* arraySizes);
+    void paramCheckFixStorage(const TSourceLoc&, const TStorageQualifier&, TType& type);
+    void paramCheckFix(const TSourceLoc&, const TQualifier&, TType& type);
+    void nestedBlockCheck(const TSourceLoc&);
+    void nestedStructCheck(const TSourceLoc&);
+    void arrayObjectCheck(const TSourceLoc&, const TType&, const char* op);
+    void opaqueCheck(const TSourceLoc&, const TType&, const char* op);
+    void referenceCheck(const TSourceLoc&, const TType&, const char* op);
+    void storage16BitAssignmentCheck(const TSourceLoc&, const TType&, const char* op);
+    void specializationCheck(const TSourceLoc&, const TType&, const char* op);
+    void structTypeCheck(const TSourceLoc&, TPublicType&);
+    void inductiveLoopCheck(const TSourceLoc&, TIntermNode* init, TIntermLoop* loop);
+    void arrayLimitCheck(const TSourceLoc&, const TString&, int size);
+    void limitCheck(const TSourceLoc&, int value, const char* limit, const char* feature);
+
+    void inductiveLoopBodyCheck(TIntermNode*, int loopIndexId, TSymbolTable&);
+    void constantIndexExpressionCheck(TIntermNode*);
+
+    void setLayoutQualifier(const TSourceLoc&, TPublicType&, TString&);
+    void setLayoutQualifier(const TSourceLoc&, TPublicType&, TString&, const TIntermTyped*);
+    void mergeObjectLayoutQualifiers(TQualifier& dest, const TQualifier& src, bool inheritOnly);
+    void layoutObjectCheck(const TSourceLoc&, const TSymbol&);
+    void layoutMemberLocationArrayCheck(const TSourceLoc&, bool memberWithLocation, TArraySizes* arraySizes);
+    void layoutTypeCheck(const TSourceLoc&, const TType&);
+    void layoutQualifierCheck(const TSourceLoc&, const TQualifier&);
+    void checkNoShaderLayouts(const TSourceLoc&, const TShaderQualifiers&);
+    void fixOffset(const TSourceLoc&, TSymbol&);
+
+    const TFunction* findFunction(const TSourceLoc& loc, const TFunction& call, bool& builtIn);
+    const TFunction* findFunctionExact(const TSourceLoc& loc, const TFunction& call, bool& builtIn);
+    const TFunction* findFunction120(const TSourceLoc& loc, const TFunction& call, bool& builtIn);
+    const TFunction* findFunction400(const TSourceLoc& loc, const TFunction& call, bool& builtIn);
+    const TFunction* findFunctionExplicitTypes(const TSourceLoc& loc, const TFunction& call, bool& builtIn);
+    void declareTypeDefaults(const TSourceLoc&, const TPublicType&);
+    TIntermNode* declareVariable(const TSourceLoc&, TString& identifier, const TPublicType&, TArraySizes* typeArray = 0, TIntermTyped* initializer = 0);
+    TIntermTyped* addConstructor(const TSourceLoc&, TIntermNode*, const TType&);
+    TIntermTyped* constructAggregate(TIntermNode*, const TType&, int, const TSourceLoc&);
+    TIntermTyped* constructBuiltIn(const TType&, TOperator, TIntermTyped*, const TSourceLoc&, bool subset);
+    void inheritMemoryQualifiers(const TQualifier& from, TQualifier& to);
+    void declareBlock(const TSourceLoc&, TTypeList& typeList, const TString* instanceName = 0, TArraySizes* arraySizes = 0);
+    void blockStageIoCheck(const TSourceLoc&, const TQualifier&);
+    void blockQualifierCheck(const TSourceLoc&, const TQualifier&, bool instanceName);
+    void fixBlockLocations(const TSourceLoc&, TQualifier&, TTypeList&, bool memberWithLocation, bool memberWithoutLocation);
+    void fixXfbOffsets(TQualifier&, TTypeList&);
+    void fixBlockUniformOffsets(TQualifier&, TTypeList&);
+    void fixBlockUniformLayoutMatrix(TQualifier&, TTypeList*, TTypeList*);
+    void fixBlockUniformLayoutPacking(TQualifier&, TTypeList*, TTypeList*);
+    void addQualifierToExisting(const TSourceLoc&, TQualifier, const TString& identifier);
+    void addQualifierToExisting(const TSourceLoc&, TQualifier, TIdentifierList&);
+    void invariantCheck(const TSourceLoc&, const TQualifier&);
+    void updateStandaloneQualifierDefaults(const TSourceLoc&, const TPublicType&);
+    void wrapupSwitchSubsequence(TIntermAggregate* statements, TIntermNode* branchNode);
+    TIntermNode* addSwitch(const TSourceLoc&, TIntermTyped* expression, TIntermAggregate* body);
+    const TTypeList* recordStructCopy(TStructRecord&, const TType*, const TType*);
+
+#ifndef GLSLANG_WEB
+    TAttributeType attributeFromName(const TString& name) const;
+    TAttributes* makeAttributes(const TString& identifier) const;
+    TAttributes* makeAttributes(const TString& identifier, TIntermNode* node) const;
+    TAttributes* mergeAttributes(TAttributes*, TAttributes*) const;
+
+    // Determine selection control from attributes
+    void handleSelectionAttributes(const TAttributes& attributes, TIntermNode*);
+    void handleSwitchAttributes(const TAttributes& attributes, TIntermNode*);
+    // Determine loop control from attributes
+    void handleLoopAttributes(const TAttributes& attributes, TIntermNode*);
+#endif
+
+    void checkAndResizeMeshViewDim(const TSourceLoc&, TType&, bool isBlockMember);
+
+protected:
+    void nonInitConstCheck(const TSourceLoc&, TString& identifier, TType& type);
+    void inheritGlobalDefaults(TQualifier& dst) const;
+    TVariable* makeInternalVariable(const char* name, const TType&) const;
+    TVariable* declareNonArray(const TSourceLoc&, const TString& identifier, const TType&);
+    void declareArray(const TSourceLoc&, const TString& identifier, const TType&, TSymbol*&);
+    void checkRuntimeSizable(const TSourceLoc&, const TIntermTyped&);
+    bool isRuntimeLength(const TIntermTyped&) const;
+    TIntermNode* executeInitializer(const TSourceLoc&, TIntermTyped* initializer, TVariable* variable);
+    TIntermTyped* convertInitializerList(const TSourceLoc&, const TType&, TIntermTyped* initializer);
+#ifndef GLSLANG_WEB
+    void finish() override;
+#endif
+
+public:
+    //
+    // Generally, bison productions, the scanner, and the PP need read/write access to these; just give them direct access
+    //
+
+    // Current state of parsing
+    bool inMain;                 // if inside a function, true if the function is main
+    const TString* blockName;
+    TQualifier currentBlockQualifier;
+    TPrecisionQualifier defaultPrecision[EbtNumTypes];
+    TBuiltInResource resources;
+    TLimits& limits;
+
+protected:
+    TParseContext(TParseContext&);
+    TParseContext& operator=(TParseContext&);
+
+    static const int maxSamplerIndex = EsdNumDims * (EbtNumTypes * (2 * 2 * 2 * 2 * 2)); // see computeSamplerTypeIndex()
+    TPrecisionQualifier defaultSamplerPrecision[maxSamplerIndex];
+    TPrecisionManager precisionManager;
+    TQualifier globalBufferDefaults;
+    TQualifier globalUniformDefaults;
+    TQualifier globalInputDefaults;
+    TQualifier globalOutputDefaults;
+    TString currentCaller;        // name of last function body entered (not valid when at global scope)
+#ifndef GLSLANG_WEB
+    int* atomicUintOffsets;       // to become an array of the right size to hold an offset per binding point
+    bool anyIndexLimits;
+    TIdSetType inductiveLoopIds;
+    TVector<TIntermTyped*> needsIndexLimitationChecking;
+    TStructRecord matrixFixRecord;
+    TStructRecord packingFixRecord;
+
+    //
+    // Geometry shader input arrays:
+    //  - array sizing is based on input primitive and/or explicit size
+    //
+    // Tessellation control output arrays:
+    //  - array sizing is based on output layout(vertices=...) and/or explicit size
+    //
+    // Both:
+    //  - array sizing is retroactive
+    //  - built-in block redeclarations interact with this
+    //
+    // Design:
+    //  - use a per-context "resize-list", a list of symbols whose array sizes
+    //    can be fixed
+    //
+    //  - the resize-list starts empty at beginning of user-shader compilation, it does
+    //    not have built-ins in it
+    //
+    //  - on built-in array use: copyUp() symbol and add it to the resize-list
+    //
+    //  - on user array declaration: add it to the resize-list
+    //
+    //  - on block redeclaration: copyUp() symbol and add it to the resize-list
+    //     * note, that appropriately gives an error if redeclaring a block that
+    //       was already used and hence already copied-up
+    //
+    //  - on seeing a layout declaration that sizes the array, fix everything in the
+    //    resize-list, giving errors for mismatch
+    //
+    //  - on seeing an array size declaration, give errors on mismatch between it and previous
+    //    array-sizing declarations
+    //
+    TVector<TSymbol*> ioArraySymbolResizeList;
+#endif
+};
+
+} // end namespace glslang
+
+#endif // _PARSER_HELPER_INCLUDED_

dep/glslang/glslang/MachineIndependent/PoolAlloc.cpp

@@ -0,0 +1,315 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+#include "../Include/Common.h"
+#include "../Include/PoolAlloc.h"
+
+#include "../Include/InitializeGlobals.h"
+#include "../OSDependent/osinclude.h"
+
+namespace glslang {
+
+// Process-wide TLS index
+OS_TLSIndex PoolIndex;
+
+// Return the thread-specific current pool.
+TPoolAllocator& GetThreadPoolAllocator()
+{
+    return *static_cast<TPoolAllocator*>(OS_GetTLSValue(PoolIndex));
+}
+
+// Set the thread-specific current pool.
+void SetThreadPoolAllocator(TPoolAllocator* poolAllocator)
+{
+    OS_SetTLSValue(PoolIndex, poolAllocator);
+}
+
+// Process-wide set up of the TLS pool storage.
+bool InitializePoolIndex()
+{
+    // Allocate a TLS index.
+    if ((PoolIndex = OS_AllocTLSIndex()) == OS_INVALID_TLS_INDEX)
+        return false;
+
+    return true;
+}
+
+//
+// Implement the functionality of the TPoolAllocator class, which
+// is documented in PoolAlloc.h.
+//
+TPoolAllocator::TPoolAllocator(int growthIncrement, int allocationAlignment) :
+    pageSize(growthIncrement),
+    alignment(allocationAlignment),
+    freeList(nullptr),
+    inUseList(nullptr),
+    numCalls(0)
+{
+    //
+    // Don't allow page sizes we know are smaller than all common
+    // OS page sizes.
+    //
+    if (pageSize < 4*1024)
+        pageSize = 4*1024;
+
+    //
+    // A large currentPageOffset indicates a new page needs to
+    // be obtained to allocate memory.
+    //
+    currentPageOffset = pageSize;
+
+    //
+    // Adjust alignment to be at least pointer aligned and
+    // power of 2.
+    //
+    size_t minAlign = sizeof(void*);
+    alignment &= ~(minAlign - 1);
+    if (alignment < minAlign)
+        alignment = minAlign;
+    size_t a = 1;
+    while (a < alignment)
+        a <<= 1;
+    alignment = a;
+    alignmentMask = a - 1;
+
+    //
+    // Align header skip
+    //
+    headerSkip = minAlign;
+    if (headerSkip < sizeof(tHeader)) {
+        headerSkip = (sizeof(tHeader) + alignmentMask) & ~alignmentMask;
+    }
+
+    push();
+}
+
+TPoolAllocator::~TPoolAllocator()
+{
+    while (inUseList) {
+        tHeader* next = inUseList->nextPage;
+        inUseList->~tHeader();
+        delete [] reinterpret_cast<char*>(inUseList);
+        inUseList = next;
+    }
+
+    //
+    // Always delete the free list memory - it can't be being
+    // (correctly) referenced, whether the pool allocator was
+    // global or not.  We should not check the guard blocks
+    // here, because we did it already when the block was
+    // placed into the free list.
+    //
+    while (freeList) {
+        tHeader* next = freeList->nextPage;
+        delete [] reinterpret_cast<char*>(freeList);
+        freeList = next;
+    }
+}
+
+const unsigned char TAllocation::guardBlockBeginVal = 0xfb;
+const unsigned char TAllocation::guardBlockEndVal   = 0xfe;
+const unsigned char TAllocation::userDataFill       = 0xcd;
+
+#   ifdef GUARD_BLOCKS
+    const size_t TAllocation::guardBlockSize = 16;
+#   else
+    const size_t TAllocation::guardBlockSize = 0;
+#   endif
+
+//
+// Check a single guard block for damage
+//
+#ifdef GUARD_BLOCKS
+void TAllocation::checkGuardBlock(unsigned char* blockMem, unsigned char val, const char* locText) const
+#else
+void TAllocation::checkGuardBlock(unsigned char*, unsigned char, const char*) const
+#endif
+{
+#ifdef GUARD_BLOCKS
+    for (size_t x = 0; x < guardBlockSize; x++) {
+        if (blockMem[x] != val) {
+            const int maxSize = 80;
+            char assertMsg[maxSize];
+
+            // We don't print the assert message.  It's here just to be helpful.
+            snprintf(assertMsg, maxSize, "PoolAlloc: Damage %s %zu byte allocation at 0x%p\n",
+                      locText, size, data());
+            assert(0 && "PoolAlloc: Damage in guard block");
+        }
+    }
+#else
+    assert(guardBlockSize == 0);
+#endif
+}
+
+void TPoolAllocator::push()
+{
+    tAllocState state = { currentPageOffset, inUseList };
+
+    stack.push_back(state);
+
+    //
+    // Indicate there is no current page to allocate from.
+    //
+    currentPageOffset = pageSize;
+}
+
+//
+// Do a mass-deallocation of all the individual allocations
+// that have occurred since the last push(), or since the
+// last pop(), or since the object's creation.
+//
+// The deallocated pages are saved for future allocations.
+//
+void TPoolAllocator::pop()
+{
+    if (stack.size() < 1)
+        return;
+
+    tHeader* page = stack.back().page;
+    currentPageOffset = stack.back().offset;
+
+    while (inUseList != page) {
+        tHeader* nextInUse = inUseList->nextPage;
+        size_t pageCount = inUseList->pageCount;
+
+        // This technically ends the lifetime of the header as C++ object,
+        // but we will still control the memory and reuse it.
+        inUseList->~tHeader(); // currently, just a debug allocation checker
+
+        if (pageCount > 1) {
+            delete [] reinterpret_cast<char*>(inUseList);
+        } else {
+            inUseList->nextPage = freeList;
+            freeList = inUseList;
+        }
+        inUseList = nextInUse;
+    }
+
+    stack.pop_back();
+}
+
+//
+// Do a mass-deallocation of all the individual allocations
+// that have occurred.
+//
+void TPoolAllocator::popAll()
+{
+    while (stack.size() > 0)
+        pop();
+}
+
+void* TPoolAllocator::allocate(size_t numBytes)
+{
+    // If we are using guard blocks, all allocations are bracketed by
+    // them: [guardblock][allocation][guardblock].  numBytes is how
+    // much memory the caller asked for.  allocationSize is the total
+    // size including guard blocks.  In release build,
+    // guardBlockSize=0 and this all gets optimized away.
+    size_t allocationSize = TAllocation::allocationSize(numBytes);
+
+    //
+    // Just keep some interesting statistics.
+    //
+    ++numCalls;
+    totalBytes += numBytes;
+
+    //
+    // Do the allocation, most likely case first, for efficiency.
+    // This step could be moved to be inline sometime.
+    //
+    if (currentPageOffset + allocationSize <= pageSize) {
+        //
+        // Safe to allocate from currentPageOffset.
+        //
+        unsigned char* memory = reinterpret_cast<unsigned char*>(inUseList) + currentPageOffset;
+        currentPageOffset += allocationSize;
+        currentPageOffset = (currentPageOffset + alignmentMask) & ~alignmentMask;
+
+        return initializeAllocation(inUseList, memory, numBytes);
+    }
+
+    if (allocationSize + headerSkip > pageSize) {
+        //
+        // Do a multi-page allocation.  Don't mix these with the others.
+        // The OS is efficient and allocating and free-ing multiple pages.
+        //
+        size_t numBytesToAlloc = allocationSize + headerSkip;
+        tHeader* memory = reinterpret_cast<tHeader*>(::new char[numBytesToAlloc]);
+        if (memory == 0)
+            return 0;
+
+        // Use placement-new to initialize header
+        new(memory) tHeader(inUseList, (numBytesToAlloc + pageSize - 1) / pageSize);
+        inUseList = memory;
+
+        currentPageOffset = pageSize;  // make next allocation come from a new page
+
+        // No guard blocks for multi-page allocations (yet)
+        return reinterpret_cast<void*>(reinterpret_cast<UINT_PTR>(memory) + headerSkip);
+    }
+
+    //
+    // Need a simple page to allocate from.
+    //
+    tHeader* memory;
+    if (freeList) {
+        memory = freeList;
+        freeList = freeList->nextPage;
+    } else {
+        memory = reinterpret_cast<tHeader*>(::new char[pageSize]);
+        if (memory == 0)
+            return 0;
+    }
+
+    // Use placement-new to initialize header
+    new(memory) tHeader(inUseList, 1);
+    inUseList = memory;
+
+    unsigned char* ret = reinterpret_cast<unsigned char*>(inUseList) + headerSkip;
+    currentPageOffset = (headerSkip + allocationSize + alignmentMask) & ~alignmentMask;
+
+    return initializeAllocation(inUseList, ret, numBytes);
+}
+
+//
+// Check all allocations in a list for damage by calling check on each.
+//
+void TAllocation::checkAllocList() const
+{
+    for (const TAllocation* alloc = this; alloc != 0; alloc = alloc->prevAlloc)
+        alloc->check();
+}
+
+} // end namespace glslang

dep/glslang/glslang/MachineIndependent/RemoveTree.cpp

@@ -0,0 +1,118 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// Copyright (C) 2013 LunarG, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+#include "../Include/intermediate.h"
+#include "RemoveTree.h"
+
+namespace glslang {
+
+//
+// Code to recursively delete the intermediate tree.
+//
+struct TRemoveTraverser : TIntermTraverser {
+    TRemoveTraverser() : TIntermTraverser(false, false, true, false) {}
+
+    virtual void visitSymbol(TIntermSymbol* node)
+    {
+        delete node;
+    }
+
+    virtual bool visitBinary(TVisit /* visit*/ , TIntermBinary* node)
+    {
+        delete node;
+
+        return true;
+    }
+
+    virtual bool visitUnary(TVisit /* visit */, TIntermUnary* node)
+    {
+        delete node;
+
+        return true;
+    }
+
+    virtual bool visitAggregate(TVisit /* visit*/ , TIntermAggregate* node)
+    {
+        delete node;
+
+        return true;
+    }
+
+    virtual bool visitSelection(TVisit /* visit*/ , TIntermSelection* node)
+    {
+        delete node;
+
+        return true;
+    }
+
+    virtual bool visitSwitch(TVisit /* visit*/ , TIntermSwitch* node)
+    {
+        delete node;
+
+        return true;
+    }
+
+    virtual void visitConstantUnion(TIntermConstantUnion* node)
+    {
+        delete node;
+    }
+
+    virtual bool visitLoop(TVisit /* visit*/ , TIntermLoop* node)
+    {
+        delete node;
+
+        return true;
+    }
+
+    virtual bool visitBranch(TVisit /* visit*/ , TIntermBranch* node)
+    {
+        delete node;
+
+        return true;
+    }
+};
+
+//
+// Entry point.
+//
+void RemoveAllTreeNodes(TIntermNode* root)
+{
+    TRemoveTraverser it;
+
+    root->traverse(&it);
+}
+
+} // end namespace glslang

dep/glslang/glslang/MachineIndependent/RemoveTree.h

@@ -0,0 +1,41 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+#pragma once
+
+namespace glslang {
+
+void RemoveAllTreeNodes(TIntermNode*);
+
+} // end namespace glslang

dep/glslang/glslang/MachineIndependent/Scan.h

@@ -0,0 +1,276 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// Copyright (C) 2013 LunarG, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+#ifndef _GLSLANG_SCAN_INCLUDED_
+#define _GLSLANG_SCAN_INCLUDED_
+
+#include "Versions.h"
+
+namespace glslang {
+
+// Use a global end-of-input character, so no translation is needed across
+// layers of encapsulation.  Characters are all 8 bit, and positive, so there is
+// no aliasing of character 255 onto -1, for example.
+const int EndOfInput = -1;
+
+//
+// A character scanner that seamlessly, on read-only strings, reads across an
+// array of strings without assuming null termination.
+//
+class TInputScanner {
+public:
+    TInputScanner(int n, const char* const s[], size_t L[], const char* const* names = nullptr,
+                  int b = 0, int f = 0, bool single = false) :
+        numSources(n),
+         // up to this point, common usage is "char*", but now we need positive 8-bit characters
+        sources(reinterpret_cast<const unsigned char* const *>(s)),
+        lengths(L), currentSource(0), currentChar(0), stringBias(b), finale(f), singleLogical(single),
+        endOfFileReached(false)
+    {
+        loc = new TSourceLoc[numSources];
+        for (int i = 0; i < numSources; ++i) {
+            loc[i].init(i - stringBias);
+        }
+        if (names != nullptr) {
+            for (int i = 0; i < numSources; ++i)
+                loc[i].name = names[i] != nullptr ? NewPoolTString(names[i]) : nullptr;
+        }
+        loc[currentSource].line = 1;
+        logicalSourceLoc.init(1);
+        logicalSourceLoc.name = loc[0].name;
+    }
+
+    virtual ~TInputScanner()
+    {
+        delete [] loc;
+    }
+
+    // retrieve the next character and advance one character
+    int get()
+    {
+        int ret = peek();
+        if (ret == EndOfInput)
+            return ret;
+        ++loc[currentSource].column;
+        ++logicalSourceLoc.column;
+        if (ret == '\n') {
+            ++loc[currentSource].line;
+            ++logicalSourceLoc.line;
+            logicalSourceLoc.column = 0;
+            loc[currentSource].column = 0;
+        }
+        advance();
+
+        return ret;
+    }
+
+    // retrieve the next character, no advance
+    int peek()
+    {
+        if (currentSource >= numSources) {
+            endOfFileReached = true;
+            return EndOfInput;
+        }
+        // Make sure we do not read off the end of a string.
+        // N.B. Sources can have a length of 0.
+        int sourceToRead = currentSource;
+        size_t charToRead = currentChar;
+        while(charToRead >= lengths[sourceToRead]) {
+            charToRead = 0;
+            sourceToRead += 1;
+            if (sourceToRead >= numSources) {
+                return EndOfInput;
+            }
+        }
+
+        // Here, we care about making negative valued characters positive
+        return sources[sourceToRead][charToRead];
+    }
+
+    // go back one character
+    void unget()
+    {
+        // Do not roll back once we've reached the end of the file.
+        if (endOfFileReached)
+            return;
+
+        if (currentChar > 0) {
+            --currentChar;
+            --loc[currentSource].column;
+            --logicalSourceLoc.column;
+            if (loc[currentSource].column < 0) {
+                // We've moved back past a new line. Find the
+                // previous newline (or start of the file) to compute
+                // the column count on the now current line.
+                size_t chIndex = currentChar;
+                while (chIndex > 0) {
+                    if (sources[currentSource][chIndex] == '\n') {
+                        break;
+                    }
+                    --chIndex;
+                }
+                logicalSourceLoc.column = (int)(currentChar - chIndex);
+                loc[currentSource].column = (int)(currentChar - chIndex);
+            }
+        } else {
+            do {
+                --currentSource;
+            } while (currentSource > 0 && lengths[currentSource] == 0);
+            if (lengths[currentSource] == 0) {
+                // set to 0 if we've backed up to the start of an empty string
+                currentChar = 0;
+            } else
+                currentChar = lengths[currentSource] - 1;
+        }
+        if (peek() == '\n') {
+            --loc[currentSource].line;
+            --logicalSourceLoc.line;
+        }
+    }
+
+    // for #line override
+    void setLine(int newLine)
+    {
+        logicalSourceLoc.line = newLine;
+        loc[getLastValidSourceIndex()].line = newLine;
+    }
+
+    // for #line override in filename based parsing
+    void setFile(const char* filename)
+    {
+        TString* fn_tstr = NewPoolTString(filename);
+        logicalSourceLoc.name = fn_tstr;
+        loc[getLastValidSourceIndex()].name = fn_tstr;
+    }
+
+    void setFile(const char* filename, int i)
+    {
+        TString* fn_tstr = NewPoolTString(filename);
+        if (i == getLastValidSourceIndex()) {
+            logicalSourceLoc.name = fn_tstr;
+        }
+        loc[i].name = fn_tstr;
+    }
+
+    void setString(int newString)
+    {
+        logicalSourceLoc.string = newString;
+        loc[getLastValidSourceIndex()].string = newString;
+        logicalSourceLoc.name = nullptr;
+        loc[getLastValidSourceIndex()].name = nullptr;
+    }
+
+    // for #include content indentation
+    void setColumn(int col)
+    {
+        logicalSourceLoc.column = col;
+        loc[getLastValidSourceIndex()].column = col;
+    }
+
+    void setEndOfInput()
+    {
+        endOfFileReached = true;
+        currentSource = numSources;
+    }
+
+    bool atEndOfInput() const { return endOfFileReached; }
+
+    const TSourceLoc& getSourceLoc() const
+    {
+        if (singleLogical) {
+            return logicalSourceLoc;
+        } else {
+            return loc[std::max(0, std::min(currentSource, numSources - finale - 1))];
+        }
+    }
+    // Returns the index (starting from 0) of the most recent valid source string we are reading from.
+    int getLastValidSourceIndex() const { return std::min(currentSource, numSources - 1); }
+
+    void consumeWhiteSpace(bool& foundNonSpaceTab);
+    bool consumeComment();
+    void consumeWhitespaceComment(bool& foundNonSpaceTab);
+    bool scanVersion(int& version, EProfile& profile, bool& notFirstToken);
+
+protected:
+
+    // advance one character
+    void advance()
+    {
+        ++currentChar;
+        if (currentChar >= lengths[currentSource]) {
+            ++currentSource;
+            if (currentSource < numSources) {
+                loc[currentSource].string = loc[currentSource - 1].string + 1;
+                loc[currentSource].line = 1;
+                loc[currentSource].column = 0;
+            }
+            while (currentSource < numSources && lengths[currentSource] == 0) {
+                ++currentSource;
+                if (currentSource < numSources) {
+                    loc[currentSource].string = loc[currentSource - 1].string + 1;
+                    loc[currentSource].line = 1;
+                    loc[currentSource].column = 0;
+                }
+            }
+            currentChar = 0;
+        }
+    }
+
+    int numSources;                      // number of strings in source
+    const unsigned char* const *sources; // array of strings; must be converted to positive values on use, to avoid aliasing with -1 as EndOfInput
+    const size_t *lengths;               // length of each string
+    int currentSource;
+    size_t currentChar;
+
+    // This is for reporting what string/line an error occurred on, and can be overridden by #line.
+    // It remembers the last state of each source string as it is left for the next one, so unget()
+    // can restore that state.
+    TSourceLoc* loc;  // an array
+
+    int stringBias;   // the first string that is the user's string number 0
+    int finale;       // number of internal strings after user's last string
+
+    TSourceLoc logicalSourceLoc;
+    bool singleLogical; // treats the strings as a single logical string.
+                        // locations will be reported from the first string.
+
+    // Set to true once peek() returns EndOfFile, so that we won't roll back
+    // once we've reached EndOfFile.
+    bool endOfFileReached;
+};
+
+} // end namespace glslang
+
+#endif // _GLSLANG_SCAN_INCLUDED_

dep/glslang/glslang/MachineIndependent/ScanContext.h

@@ -0,0 +1,93 @@
+//
+// Copyright (C) 2013 LunarG, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+//
+// This holds context specific to the GLSL scanner, which
+// sits between the preprocessor scanner and parser.
+//
+
+#pragma once
+
+#include "ParseHelper.h"
+
+namespace glslang {
+
+class TPpContext;
+class TPpToken;
+class TParserToken;
+
+class TScanContext {
+public:
+    explicit TScanContext(TParseContextBase& pc) :
+        parseContext(pc),
+        afterType(false), afterStruct(false),
+        field(false), afterBuffer(false) { }
+    virtual ~TScanContext() { }
+
+    static void fillInKeywordMap();
+    static void deleteKeywordMap();
+
+    int tokenize(TPpContext*, TParserToken&);
+
+protected:
+    TScanContext(TScanContext&);
+    TScanContext& operator=(TScanContext&);
+
+    int tokenizeIdentifier();
+    int identifierOrType();
+    int reservedWord();
+    int identifierOrReserved(bool reserved);
+    int es30ReservedFromGLSL(int version);
+    int nonreservedKeyword(int esVersion, int nonEsVersion);
+    int precisionKeyword();
+    int matNxM();
+    int dMat();
+    int firstGenerationImage(bool inEs310);
+    int secondGenerationImage();
+
+    TParseContextBase& parseContext;
+    bool afterType;           // true if we've recognized a type, so can only be looking for an identifier
+    bool afterStruct;         // true if we've recognized the STRUCT keyword, so can only be looking for an identifier
+    bool field;               // true if we're on a field, right after a '.'
+    bool afterBuffer;         // true if we've recognized the BUFFER keyword
+    TSourceLoc loc;
+    TParserToken* parserToken;
+    TPpToken* ppToken;
+
+    const char* tokenText;
+    int keyword;
+};
+
+} // end namespace glslang

dep/glslang/glslang/MachineIndependent/SymbolTable.cpp

@@ -0,0 +1,446 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// Copyright (C) 2012-2013 LunarG, Inc.
+// Copyright (C) 2017 ARM Limited.
+// Copyright (C) 2015-2018 Google, Inc.
+// Modifications Copyright (C) 2020 Advanced Micro Devices, Inc. All rights reserved.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+//
+// Symbol table for parsing.  Most functionality and main ideas
+// are documented in the header file.
+//
+
+#include "SymbolTable.h"
+
+namespace glslang {
+
+//
+// TType helper function needs a place to live.
+//
+
+//
+// Recursively generate mangled names.
+//
+void TType::buildMangledName(TString& mangledName) const
+{
+    if (isMatrix())
+        mangledName += 'm';
+    else if (isVector())
+        mangledName += 'v';
+
+    switch (basicType) {
+    case EbtFloat:              mangledName += 'f';      break;
+    case EbtInt:                mangledName += 'i';      break;
+    case EbtUint:               mangledName += 'u';      break;
+    case EbtBool:               mangledName += 'b';      break;
+#ifndef GLSLANG_WEB
+    case EbtDouble:             mangledName += 'd';      break;
+    case EbtFloat16:            mangledName += "f16";    break;
+    case EbtInt8:               mangledName += "i8";     break;
+    case EbtUint8:              mangledName += "u8";     break;
+    case EbtInt16:              mangledName += "i16";    break;
+    case EbtUint16:             mangledName += "u16";    break;
+    case EbtInt64:              mangledName += "i64";    break;
+    case EbtUint64:             mangledName += "u64";    break;
+    case EbtAtomicUint:         mangledName += "au";     break;
+    case EbtAccStruct:          mangledName += "as";     break;
+    case EbtRayQuery:           mangledName += "rq";     break;
+#endif
+    case EbtSampler:
+        switch (sampler.type) {
+#ifndef GLSLANG_WEB
+        case EbtFloat16: mangledName += "f16"; break;
+#endif
+        case EbtInt:   mangledName += "i"; break;
+        case EbtUint:  mangledName += "u"; break;
+        default: break; // some compilers want this
+        }
+        if (sampler.isImageClass())
+            mangledName += "I";  // a normal image or subpass
+        else if (sampler.isPureSampler())
+            mangledName += "p";  // a "pure" sampler
+        else if (!sampler.isCombined())
+            mangledName += "t";  // a "pure" texture
+        else
+            mangledName += "s";  // traditional combined sampler
+        if (sampler.isArrayed())
+            mangledName += "A";
+        if (sampler.isShadow())
+            mangledName += "S";
+        if (sampler.isExternal())
+            mangledName += "E";
+        if (sampler.isYuv())
+            mangledName += "Y";
+        switch (sampler.dim) {
+        case Esd2D:       mangledName += "2";  break;
+        case Esd3D:       mangledName += "3";  break;
+        case EsdCube:     mangledName += "C";  break;
+#ifndef GLSLANG_WEB
+        case Esd1D:       mangledName += "1";  break;
+        case EsdRect:     mangledName += "R2"; break;
+        case EsdBuffer:   mangledName += "B";  break;
+        case EsdSubpass:  mangledName += "P";  break;
+#endif
+        default: break; // some compilers want this
+        }
+
+#ifdef ENABLE_HLSL
+        if (sampler.hasReturnStruct()) {
+            // Name mangle for sampler return struct uses struct table index.
+            mangledName += "-tx-struct";
+
+            char text[16]; // plenty enough space for the small integers.
+            snprintf(text, sizeof(text), "%u-", sampler.getStructReturnIndex());
+            mangledName += text;
+        } else {
+            switch (sampler.getVectorSize()) {
+            case 1: mangledName += "1"; break;
+            case 2: mangledName += "2"; break;
+            case 3: mangledName += "3"; break;
+            case 4: break; // default to prior name mangle behavior
+            }
+        }
+#endif
+
+        if (sampler.isMultiSample())
+            mangledName += "M";
+        break;
+    case EbtStruct:
+    case EbtBlock:
+        if (basicType == EbtStruct)
+            mangledName += "struct-";
+        else
+            mangledName += "block-";
+        if (typeName)
+            mangledName += *typeName;
+        for (unsigned int i = 0; i < structure->size(); ++i) {
+            mangledName += '-';
+            (*structure)[i].type->buildMangledName(mangledName);
+        }
+    default:
+        break;
+    }
+
+    if (getVectorSize() > 0)
+        mangledName += static_cast<char>('0' + getVectorSize());
+    else {
+        mangledName += static_cast<char>('0' + getMatrixCols());
+        mangledName += static_cast<char>('0' + getMatrixRows());
+    }
+
+    if (arraySizes) {
+        const int maxSize = 11;
+        char buf[maxSize];
+        for (int i = 0; i < arraySizes->getNumDims(); ++i) {
+            if (arraySizes->getDimNode(i)) {
+                if (arraySizes->getDimNode(i)->getAsSymbolNode())
+                    snprintf(buf, maxSize, "s%d", arraySizes->getDimNode(i)->getAsSymbolNode()->getId());
+                else
+                    snprintf(buf, maxSize, "s%p", arraySizes->getDimNode(i));
+            } else
+                snprintf(buf, maxSize, "%d", arraySizes->getDimSize(i));
+            mangledName += '[';
+            mangledName += buf;
+            mangledName += ']';
+        }
+    }
+}
+
+#ifndef GLSLANG_WEB
+
+//
+// Dump functions.
+//
+
+void TSymbol::dumpExtensions(TInfoSink& infoSink) const
+{
+    int numExtensions = getNumExtensions();
+    if (numExtensions) {
+        infoSink.debug << " <";
+
+        for (int i = 0; i < numExtensions; i++)
+            infoSink.debug << getExtensions()[i] << ",";
+
+        infoSink.debug << ">";
+    }
+}
+
+void TVariable::dump(TInfoSink& infoSink, bool complete) const
+{
+    if (complete) {
+        infoSink.debug << getName().c_str() << ": " << type.getCompleteString();
+        dumpExtensions(infoSink);
+    } else {
+        infoSink.debug << getName().c_str() << ": " << type.getStorageQualifierString() << " "
+                       << type.getBasicTypeString();
+
+        if (type.isArray())
+            infoSink.debug << "[0]";
+    }
+
+    infoSink.debug << "\n";
+}
+
+void TFunction::dump(TInfoSink& infoSink, bool complete) const
+{
+    if (complete) {
+        infoSink.debug << getName().c_str() << ": " << returnType.getCompleteString() << " " << getName().c_str()
+                       << "(";
+
+        int numParams = getParamCount();
+        for (int i = 0; i < numParams; i++) {
+            const TParameter &param = parameters[i];
+            infoSink.debug << param.type->getCompleteString() << " "
+                           << (param.type->isStruct() ? "of " + param.type->getTypeName() + " " : "")
+                           << (param.name ? *param.name : "") << (i < numParams - 1 ? "," : "");
+        }
+
+        infoSink.debug << ")";
+        dumpExtensions(infoSink);
+    } else {
+        infoSink.debug << getName().c_str() << ": " << returnType.getBasicTypeString() << " "
+                       << getMangledName().c_str() << "n";
+    }
+
+    infoSink.debug << "\n";
+}
+
+void TAnonMember::dump(TInfoSink& TInfoSink, bool) const
+{
+    TInfoSink.debug << "anonymous member " << getMemberNumber() << " of " << getAnonContainer().getName().c_str()
+                    << "\n";
+}
+
+void TSymbolTableLevel::dump(TInfoSink& infoSink, bool complete) const
+{
+    tLevel::const_iterator it;
+    for (it = level.begin(); it != level.end(); ++it)
+        (*it).second->dump(infoSink, complete);
+}
+
+void TSymbolTable::dump(TInfoSink& infoSink, bool complete) const
+{
+    for (int level = currentLevel(); level >= 0; --level) {
+        infoSink.debug << "LEVEL " << level << "\n";
+        table[level]->dump(infoSink, complete);
+    }
+}
+
+#endif
+
+//
+// Functions have buried pointers to delete.
+//
+TFunction::~TFunction()
+{
+    for (TParamList::iterator i = parameters.begin(); i != parameters.end(); ++i)
+        delete (*i).type;
+}
+
+//
+// Symbol table levels are a map of pointers to symbols that have to be deleted.
+//
+TSymbolTableLevel::~TSymbolTableLevel()
+{
+    for (tLevel::iterator it = level.begin(); it != level.end(); ++it)
+        delete (*it).second;
+
+    delete [] defaultPrecision;
+}
+
+//
+// Change all function entries in the table with the non-mangled name
+// to be related to the provided built-in operation.
+//
+void TSymbolTableLevel::relateToOperator(const char* name, TOperator op)
+{
+    tLevel::const_iterator candidate = level.lower_bound(name);
+    while (candidate != level.end()) {
+        const TString& candidateName = (*candidate).first;
+        TString::size_type parenAt = candidateName.find_first_of('(');
+        if (parenAt != candidateName.npos && candidateName.compare(0, parenAt, name) == 0) {
+            TFunction* function = (*candidate).second->getAsFunction();
+            function->relateToOperator(op);
+        } else
+            break;
+        ++candidate;
+    }
+}
+
+// Make all function overloads of the given name require an extension(s).
+// Should only be used for a version/profile that actually needs the extension(s).
+void TSymbolTableLevel::setFunctionExtensions(const char* name, int num, const char* const extensions[])
+{
+    tLevel::const_iterator candidate = level.lower_bound(name);
+    while (candidate != level.end()) {
+        const TString& candidateName = (*candidate).first;
+        TString::size_type parenAt = candidateName.find_first_of('(');
+        if (parenAt != candidateName.npos && candidateName.compare(0, parenAt, name) == 0) {
+            TSymbol* symbol = candidate->second;
+            symbol->setExtensions(num, extensions);
+        } else
+            break;
+        ++candidate;
+    }
+}
+
+//
+// Make all symbols in this table level read only.
+//
+void TSymbolTableLevel::readOnly()
+{
+    for (tLevel::iterator it = level.begin(); it != level.end(); ++it)
+        (*it).second->makeReadOnly();
+}
+
+//
+// Copy a symbol, but the copy is writable; call readOnly() afterward if that's not desired.
+//
+TSymbol::TSymbol(const TSymbol& copyOf)
+{
+    name = NewPoolTString(copyOf.name->c_str());
+    uniqueId = copyOf.uniqueId;
+    writable = true;
+}
+
+TVariable::TVariable(const TVariable& copyOf) : TSymbol(copyOf)
+{
+    type.deepCopy(copyOf.type);
+    userType = copyOf.userType;
+
+    // we don't support specialization-constant subtrees in cloned tables, only extensions
+    constSubtree = nullptr;
+    extensions = nullptr;
+    memberExtensions = nullptr;
+    if (copyOf.getNumExtensions() > 0)
+        setExtensions(copyOf.getNumExtensions(), copyOf.getExtensions());
+    if (copyOf.hasMemberExtensions()) {
+        for (int m = 0; m < (int)copyOf.type.getStruct()->size(); ++m) {
+            if (copyOf.getNumMemberExtensions(m) > 0)
+                setMemberExtensions(m, copyOf.getNumMemberExtensions(m), copyOf.getMemberExtensions(m));
+        }
+    }
+
+    if (! copyOf.constArray.empty()) {
+        assert(! copyOf.type.isStruct());
+        TConstUnionArray newArray(copyOf.constArray, 0, copyOf.constArray.size());
+        constArray = newArray;
+    }
+}
+
+TVariable* TVariable::clone() const
+{
+    TVariable *variable = new TVariable(*this);
+
+    return variable;
+}
+
+TFunction::TFunction(const TFunction& copyOf) : TSymbol(copyOf)
+{
+    for (unsigned int i = 0; i < copyOf.parameters.size(); ++i) {
+        TParameter param;
+        parameters.push_back(param);
+        parameters.back().copyParam(copyOf.parameters[i]);
+    }
+
+    extensions = nullptr;
+    if (copyOf.getNumExtensions() > 0)
+        setExtensions(copyOf.getNumExtensions(), copyOf.getExtensions());
+    returnType.deepCopy(copyOf.returnType);
+    mangledName = copyOf.mangledName;
+    op = copyOf.op;
+    defined = copyOf.defined;
+    prototyped = copyOf.prototyped;
+    implicitThis = copyOf.implicitThis;
+    illegalImplicitThis = copyOf.illegalImplicitThis;
+    defaultParamCount = copyOf.defaultParamCount;
+}
+
+TFunction* TFunction::clone() const
+{
+    TFunction *function = new TFunction(*this);
+
+    return function;
+}
+
+TAnonMember* TAnonMember::clone() const
+{
+    // Anonymous members of a given block should be cloned at a higher level,
+    // where they can all be assured to still end up pointing to a single
+    // copy of the original container.
+    assert(0);
+
+    return 0;
+}
+
+TSymbolTableLevel* TSymbolTableLevel::clone() const
+{
+    TSymbolTableLevel *symTableLevel = new TSymbolTableLevel();
+    symTableLevel->anonId = anonId;
+    symTableLevel->thisLevel = thisLevel;
+    std::vector<bool> containerCopied(anonId, false);
+    tLevel::const_iterator iter;
+    for (iter = level.begin(); iter != level.end(); ++iter) {
+        const TAnonMember* anon = iter->second->getAsAnonMember();
+        if (anon) {
+            // Insert all the anonymous members of this same container at once,
+            // avoid inserting the remaining members in the future, once this has been done,
+            // allowing them to all be part of the same new container.
+            if (! containerCopied[anon->getAnonId()]) {
+                TVariable* container = anon->getAnonContainer().clone();
+                container->changeName(NewPoolTString(""));
+                // insert the container and all its members
+                symTableLevel->insert(*container, false);
+                containerCopied[anon->getAnonId()] = true;
+            }
+        } else
+            symTableLevel->insert(*iter->second->clone(), false);
+    }
+
+    return symTableLevel;
+}
+
+void TSymbolTable::copyTable(const TSymbolTable& copyOf)
+{
+    assert(adoptedLevels == copyOf.adoptedLevels);
+
+    uniqueId = copyOf.uniqueId;
+    noBuiltInRedeclarations = copyOf.noBuiltInRedeclarations;
+    separateNameSpaces = copyOf.separateNameSpaces;
+    for (unsigned int i = copyOf.adoptedLevels; i < copyOf.table.size(); ++i)
+        table.push_back(copyOf.table[i]->clone());
+}
+
+} // end namespace glslang

dep/glslang/glslang/MachineIndependent/SymbolTable.h

@@ -0,0 +1,885 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// Copyright (C) 2013 LunarG, Inc.
+// Copyright (C) 2015-2018 Google, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+#ifndef _SYMBOL_TABLE_INCLUDED_
+#define _SYMBOL_TABLE_INCLUDED_
+
+//
+// Symbol table for parsing.  Has these design characteristics:
+//
+// * Same symbol table can be used to compile many shaders, to preserve
+//   effort of creating and loading with the large numbers of built-in
+//   symbols.
+//
+// -->  This requires a copy mechanism, so initial pools used to create
+//   the shared information can be popped.  Done through "clone"
+//   methods.
+//
+// * Name mangling will be used to give each function a unique name
+//   so that symbol table lookups are never ambiguous.  This allows
+//   a simpler symbol table structure.
+//
+// * Pushing and popping of scope, so symbol table will really be a stack
+//   of symbol tables.  Searched from the top, with new inserts going into
+//   the top.
+//
+// * Constants:  Compile time constant symbols will keep their values
+//   in the symbol table.  The parser can substitute constants at parse
+//   time, including doing constant folding and constant propagation.
+//
+// * No temporaries:  Temporaries made from operations (+, --, .xy, etc.)
+//   are tracked in the intermediate representation, not the symbol table.
+//
+
+#include "../Include/Common.h"
+#include "../Include/intermediate.h"
+#include "../Include/InfoSink.h"
+
+namespace glslang {
+
+//
+// Symbol base class.  (Can build functions or variables out of these...)
+//
+
+class TVariable;
+class TFunction;
+class TAnonMember;
+
+typedef TVector<const char*> TExtensionList;
+
+class TSymbol {
+public:
+    POOL_ALLOCATOR_NEW_DELETE(GetThreadPoolAllocator())
+    explicit TSymbol(const TString *n) :  name(n), extensions(0), writable(true) { }
+    virtual TSymbol* clone() const = 0;
+    virtual ~TSymbol() { }  // rely on all symbol owned memory coming from the pool
+
+    virtual const TString& getName() const { return *name; }
+    virtual void changeName(const TString* newName) { name = newName; }
+    virtual void addPrefix(const char* prefix)
+    {
+        TString newName(prefix);
+        newName.append(*name);
+        changeName(NewPoolTString(newName.c_str()));
+    }
+    virtual const TString& getMangledName() const { return getName(); }
+    virtual TFunction* getAsFunction() { return 0; }
+    virtual const TFunction* getAsFunction() const { return 0; }
+    virtual TVariable* getAsVariable() { return 0; }
+    virtual const TVariable* getAsVariable() const { return 0; }
+    virtual const TAnonMember* getAsAnonMember() const { return 0; }
+    virtual const TType& getType() const = 0;
+    virtual TType& getWritableType() = 0;
+    virtual void setUniqueId(int id) { uniqueId = id; }
+    virtual int getUniqueId() const { return uniqueId; }
+    virtual void setExtensions(int numExts, const char* const exts[])
+    {
+        assert(extensions == 0);
+        assert(numExts > 0);
+        extensions = NewPoolObject(extensions);
+        for (int e = 0; e < numExts; ++e)
+            extensions->push_back(exts[e]);
+    }
+    virtual int getNumExtensions() const { return extensions == nullptr ? 0 : (int)extensions->size(); }
+    virtual const char** getExtensions() const { return extensions->data(); }
+
+#ifndef GLSLANG_WEB
+    virtual void dump(TInfoSink& infoSink, bool complete = false) const = 0;
+    void dumpExtensions(TInfoSink& infoSink) const;
+#endif
+
+    virtual bool isReadOnly() const { return ! writable; }
+    virtual void makeReadOnly() { writable = false; }
+
+protected:
+    explicit TSymbol(const TSymbol&);
+    TSymbol& operator=(const TSymbol&);
+
+    const TString *name;
+    unsigned int uniqueId;      // For cross-scope comparing during code generation
+
+    // For tracking what extensions must be present
+    // (don't use if correct version/profile is present).
+    TExtensionList* extensions; // an array of pointers to existing constant char strings
+
+    //
+    // N.B.: Non-const functions that will be generally used should assert on this,
+    // to avoid overwriting shared symbol-table information.
+    //
+    bool writable;
+};
+
+//
+// Variable class, meaning a symbol that's not a function.
+//
+// There could be a separate class hierarchy for Constant variables;
+// Only one of int, bool, or float, (or none) is correct for
+// any particular use, but it's easy to do this way, and doesn't
+// seem worth having separate classes, and "getConst" can't simply return
+// different values for different types polymorphically, so this is
+// just simple and pragmatic.
+//
+class TVariable : public TSymbol {
+public:
+    TVariable(const TString *name, const TType& t, bool uT = false )
+        : TSymbol(name),
+          userType(uT),
+          constSubtree(nullptr),
+          memberExtensions(nullptr),
+          anonId(-1)
+        { type.shallowCopy(t); }
+    virtual TVariable* clone() const;
+    virtual ~TVariable() { }
+
+    virtual TVariable* getAsVariable() { return this; }
+    virtual const TVariable* getAsVariable() const { return this; }
+    virtual const TType& getType() const { return type; }
+    virtual TType& getWritableType() { assert(writable); return type; }
+    virtual bool isUserType() const { return userType; }
+    virtual const TConstUnionArray& getConstArray() const { return constArray; }
+    virtual TConstUnionArray& getWritableConstArray() { assert(writable); return constArray; }
+    virtual void setConstArray(const TConstUnionArray& array) { constArray = array; }
+    virtual void setConstSubtree(TIntermTyped* subtree) { constSubtree = subtree; }
+    virtual TIntermTyped* getConstSubtree() const { return constSubtree; }
+    virtual void setAnonId(int i) { anonId = i; }
+    virtual int getAnonId() const { return anonId; }
+
+    virtual void setMemberExtensions(int member, int numExts, const char* const exts[])
+    {
+        assert(type.isStruct());
+        assert(numExts > 0);
+        if (memberExtensions == nullptr) {
+            memberExtensions = NewPoolObject(memberExtensions);
+            memberExtensions->resize(type.getStruct()->size());
+        }
+        for (int e = 0; e < numExts; ++e)
+            (*memberExtensions)[member].push_back(exts[e]);
+    }
+    virtual bool hasMemberExtensions() const { return memberExtensions != nullptr; }
+    virtual int getNumMemberExtensions(int member) const 
+    {
+        return memberExtensions == nullptr ? 0 : (int)(*memberExtensions)[member].size();
+    }
+    virtual const char** getMemberExtensions(int member) const { return (*memberExtensions)[member].data(); }
+
+#ifndef GLSLANG_WEB
+    virtual void dump(TInfoSink& infoSink, bool complete = false) const;
+#endif
+
+protected:
+    explicit TVariable(const TVariable&);
+    TVariable& operator=(const TVariable&);
+
+    TType type;
+    bool userType;
+
+    // we are assuming that Pool Allocator will free the memory allocated to unionArray
+    // when this object is destroyed
+
+    TConstUnionArray constArray;               // for compile-time constant value
+    TIntermTyped* constSubtree;                // for specialization constant computation
+    TVector<TExtensionList>* memberExtensions; // per-member extension list, allocated only when needed
+    int anonId; // the ID used for anonymous blocks: TODO: see if uniqueId could serve a dual purpose
+};
+
+//
+// The function sub-class of symbols and the parser will need to
+// share this definition of a function parameter.
+//
+struct TParameter {
+    TString *name;
+    TType* type;
+    TIntermTyped* defaultValue;
+    void copyParam(const TParameter& param)
+    {
+        if (param.name)
+            name = NewPoolTString(param.name->c_str());
+        else
+            name = 0;
+        type = param.type->clone();
+        defaultValue = param.defaultValue;
+    }
+    TBuiltInVariable getDeclaredBuiltIn() const { return type->getQualifier().declaredBuiltIn; }
+};
+
+//
+// The function sub-class of a symbol.
+//
+class TFunction : public TSymbol {
+public:
+    explicit TFunction(TOperator o) :
+        TSymbol(0),
+        op(o),
+        defined(false), prototyped(false), implicitThis(false), illegalImplicitThis(false), defaultParamCount(0) { }
+    TFunction(const TString *name, const TType& retType, TOperator tOp = EOpNull) :
+        TSymbol(name),
+        mangledName(*name + '('),
+        op(tOp),
+        defined(false), prototyped(false), implicitThis(false), illegalImplicitThis(false), defaultParamCount(0)
+    {
+        returnType.shallowCopy(retType);
+        declaredBuiltIn = retType.getQualifier().builtIn;
+    }
+    virtual TFunction* clone() const override;
+    virtual ~TFunction();
+
+    virtual TFunction* getAsFunction() override { return this; }
+    virtual const TFunction* getAsFunction() const override { return this; }
+
+    // Install 'p' as the (non-'this') last parameter.
+    // Non-'this' parameters are reflected in both the list of parameters and the
+    // mangled name.
+    virtual void addParameter(TParameter& p)
+    {
+        assert(writable);
+        parameters.push_back(p);
+        p.type->appendMangledName(mangledName);
+
+        if (p.defaultValue != nullptr)
+            defaultParamCount++;
+    }
+
+    // Install 'this' as the first parameter.
+    // 'this' is reflected in the list of parameters, but not the mangled name.
+    virtual void addThisParameter(TType& type, const char* name)
+    {
+        TParameter p = { NewPoolTString(name), new TType, nullptr };
+        p.type->shallowCopy(type);
+        parameters.insert(parameters.begin(), p);
+    }
+
+    virtual void addPrefix(const char* prefix) override
+    {
+        TSymbol::addPrefix(prefix);
+        mangledName.insert(0, prefix);
+    }
+
+    virtual void removePrefix(const TString& prefix)
+    {
+        assert(mangledName.compare(0, prefix.size(), prefix) == 0);
+        mangledName.erase(0, prefix.size());
+    }
+
+    virtual const TString& getMangledName() const override { return mangledName; }
+    virtual const TType& getType() const override { return returnType; }
+    virtual TBuiltInVariable getDeclaredBuiltInType() const { return declaredBuiltIn; }
+    virtual TType& getWritableType() override { return returnType; }
+    virtual void relateToOperator(TOperator o) { assert(writable); op = o; }
+    virtual TOperator getBuiltInOp() const { return op; }
+    virtual void setDefined() { assert(writable); defined = true; }
+    virtual bool isDefined() const { return defined; }
+    virtual void setPrototyped() { assert(writable); prototyped = true; }
+    virtual bool isPrototyped() const { return prototyped; }
+    virtual void setImplicitThis() { assert(writable); implicitThis = true; }
+    virtual bool hasImplicitThis() const { return implicitThis; }
+    virtual void setIllegalImplicitThis() { assert(writable); illegalImplicitThis = true; }
+    virtual bool hasIllegalImplicitThis() const { return illegalImplicitThis; }
+
+    // Return total number of parameters
+    virtual int getParamCount() const { return static_cast<int>(parameters.size()); }
+    // Return number of parameters with default values.
+    virtual int getDefaultParamCount() const { return defaultParamCount; }
+    // Return number of fixed parameters (without default values)
+    virtual int getFixedParamCount() const { return getParamCount() - getDefaultParamCount(); }
+
+    virtual TParameter& operator[](int i) { assert(writable); return parameters[i]; }
+    virtual const TParameter& operator[](int i) const { return parameters[i]; }
+
+#ifndef GLSLANG_WEB
+    virtual void dump(TInfoSink& infoSink, bool complete = false) const override;
+#endif
+
+protected:
+    explicit TFunction(const TFunction&);
+    TFunction& operator=(const TFunction&);
+
+    typedef TVector<TParameter> TParamList;
+    TParamList parameters;
+    TType returnType;
+    TBuiltInVariable declaredBuiltIn;
+
+    TString mangledName;
+    TOperator op;
+    bool defined;
+    bool prototyped;
+    bool implicitThis;         // True if this function is allowed to see all members of 'this'
+    bool illegalImplicitThis;  // True if this function is not supposed to have access to dynamic members of 'this',
+                               // even if it finds member variables in the symbol table.
+                               // This is important for a static member function that has member variables in scope,
+                               // but is not allowed to use them, or see hidden symbols instead.
+    int  defaultParamCount;
+};
+
+//
+// Members of anonymous blocks are a kind of TSymbol.  They are not hidden in
+// the symbol table behind a container; rather they are visible and point to
+// their anonymous container.  (The anonymous container is found through the
+// member, not the other way around.)
+//
+class TAnonMember : public TSymbol {
+public:
+    TAnonMember(const TString* n, unsigned int m, TVariable& a, int an) : TSymbol(n), anonContainer(a), memberNumber(m), anonId(an) { }
+    virtual TAnonMember* clone() const override;
+    virtual ~TAnonMember() { }
+
+    virtual const TAnonMember* getAsAnonMember() const override { return this; }
+    virtual const TVariable& getAnonContainer() const { return anonContainer; }
+    virtual unsigned int getMemberNumber() const { return memberNumber; }
+
+    virtual const TType& getType() const override
+    {
+        const TTypeList& types = *anonContainer.getType().getStruct();
+        return *types[memberNumber].type;
+    }
+
+    virtual TType& getWritableType() override
+    {
+        assert(writable);
+        const TTypeList& types = *anonContainer.getType().getStruct();
+        return *types[memberNumber].type;
+    }
+
+    virtual void setExtensions(int numExts, const char* const exts[]) override
+    {
+        anonContainer.setMemberExtensions(memberNumber, numExts, exts);
+    }
+    virtual int getNumExtensions() const override { return anonContainer.getNumMemberExtensions(memberNumber); }
+    virtual const char** getExtensions() const override { return anonContainer.getMemberExtensions(memberNumber); }
+
+    virtual int getAnonId() const { return anonId; }
+#ifndef GLSLANG_WEB
+    virtual void dump(TInfoSink& infoSink, bool complete = false) const override;
+#endif
+
+protected:
+    explicit TAnonMember(const TAnonMember&);
+    TAnonMember& operator=(const TAnonMember&);
+
+    TVariable& anonContainer;
+    unsigned int memberNumber;
+    int anonId;
+};
+
+class TSymbolTableLevel {
+public:
+    POOL_ALLOCATOR_NEW_DELETE(GetThreadPoolAllocator())
+    TSymbolTableLevel() : defaultPrecision(0), anonId(0), thisLevel(false) { }
+    ~TSymbolTableLevel();
+
+    bool insert(TSymbol& symbol, bool separateNameSpaces)
+    {
+        //
+        // returning true means symbol was added to the table with no semantic errors
+        //
+        const TString& name = symbol.getName();
+        if (name == "") {
+            symbol.getAsVariable()->setAnonId(anonId++);
+            // An empty name means an anonymous container, exposing its members to the external scope.
+            // Give it a name and insert its members in the symbol table, pointing to the container.
+            char buf[20];
+            snprintf(buf, 20, "%s%d", AnonymousPrefix, symbol.getAsVariable()->getAnonId());
+            symbol.changeName(NewPoolTString(buf));
+
+            return insertAnonymousMembers(symbol, 0);
+        } else {
+            // Check for redefinition errors:
+            // - STL itself will tell us if there is a direct name collision, with name mangling, at this level
+            // - additionally, check for function-redefining-variable name collisions
+            const TString& insertName = symbol.getMangledName();
+            if (symbol.getAsFunction()) {
+                // make sure there isn't a variable of this name
+                if (! separateNameSpaces && level.find(name) != level.end())
+                    return false;
+
+                // insert, and whatever happens is okay
+                level.insert(tLevelPair(insertName, &symbol));
+
+                return true;
+            } else
+                return level.insert(tLevelPair(insertName, &symbol)).second;
+        }
+    }
+
+    // Add more members to an already inserted aggregate object
+    bool amend(TSymbol& symbol, int firstNewMember)
+    {
+        // See insert() for comments on basic explanation of insert.
+        // This operates similarly, but more simply.
+        // Only supporting amend of anonymous blocks so far.
+        if (IsAnonymous(symbol.getName()))
+            return insertAnonymousMembers(symbol, firstNewMember);
+        else
+            return false;
+    }
+
+    bool insertAnonymousMembers(TSymbol& symbol, int firstMember)
+    {
+        const TTypeList& types = *symbol.getAsVariable()->getType().getStruct();
+        for (unsigned int m = firstMember; m < types.size(); ++m) {
+            TAnonMember* member = new TAnonMember(&types[m].type->getFieldName(), m, *symbol.getAsVariable(), symbol.getAsVariable()->getAnonId());
+            if (! level.insert(tLevelPair(member->getMangledName(), member)).second)
+                return false;
+        }
+
+        return true;
+    }
+
+    TSymbol* find(const TString& name) const
+    {
+        tLevel::const_iterator it = level.find(name);
+        if (it == level.end())
+            return 0;
+        else
+            return (*it).second;
+    }
+
+    void findFunctionNameList(const TString& name, TVector<const TFunction*>& list)
+    {
+        size_t parenAt = name.find_first_of('(');
+        TString base(name, 0, parenAt + 1);
+
+        tLevel::const_iterator begin = level.lower_bound(base);
+        base[parenAt] = ')';  // assume ')' is lexically after '('
+        tLevel::const_iterator end = level.upper_bound(base);
+        for (tLevel::const_iterator it = begin; it != end; ++it)
+            list.push_back(it->second->getAsFunction());
+    }
+
+    // See if there is already a function in the table having the given non-function-style name.
+    bool hasFunctionName(const TString& name) const
+    {
+        tLevel::const_iterator candidate = level.lower_bound(name);
+        if (candidate != level.end()) {
+            const TString& candidateName = (*candidate).first;
+            TString::size_type parenAt = candidateName.find_first_of('(');
+            if (parenAt != candidateName.npos && candidateName.compare(0, parenAt, name) == 0)
+
+                return true;
+        }
+
+        return false;
+    }
+
+    // See if there is a variable at this level having the given non-function-style name.
+    // Return true if name is found, and set variable to true if the name was a variable.
+    bool findFunctionVariableName(const TString& name, bool& variable) const
+    {
+        tLevel::const_iterator candidate = level.lower_bound(name);
+        if (candidate != level.end()) {
+            const TString& candidateName = (*candidate).first;
+            TString::size_type parenAt = candidateName.find_first_of('(');
+            if (parenAt == candidateName.npos) {
+                // not a mangled name
+                if (candidateName == name) {
+                    // found a variable name match
+                    variable = true;
+                    return true;
+                }
+            } else {
+                // a mangled name
+                if (candidateName.compare(0, parenAt, name) == 0) {
+                    // found a function name match
+                    variable = false;
+                    return true;
+                }
+            }
+        }
+
+        return false;
+    }
+
+    // Use this to do a lazy 'push' of precision defaults the first time
+    // a precision statement is seen in a new scope.  Leave it at 0 for
+    // when no push was needed.  Thus, it is not the current defaults,
+    // it is what to restore the defaults to when popping a level.
+    void setPreviousDefaultPrecisions(const TPrecisionQualifier *p)
+    {
+        // can call multiple times at one scope, will only latch on first call,
+        // as we're tracking the previous scope's values, not the current values
+        if (defaultPrecision != 0)
+            return;
+
+        defaultPrecision = new TPrecisionQualifier[EbtNumTypes];
+        for (int t = 0; t < EbtNumTypes; ++t)
+            defaultPrecision[t] = p[t];
+    }
+
+    void getPreviousDefaultPrecisions(TPrecisionQualifier *p)
+    {
+        // can be called for table level pops that didn't set the
+        // defaults
+        if (defaultPrecision == 0 || p == 0)
+            return;
+
+        for (int t = 0; t < EbtNumTypes; ++t)
+            p[t] = defaultPrecision[t];
+    }
+
+    void relateToOperator(const char* name, TOperator op);
+    void setFunctionExtensions(const char* name, int num, const char* const extensions[]);
+#ifndef GLSLANG_WEB
+    void dump(TInfoSink& infoSink, bool complete = false) const;
+#endif
+    TSymbolTableLevel* clone() const;
+    void readOnly();
+
+    void setThisLevel() { thisLevel = true; }
+    bool isThisLevel() const { return thisLevel; }
+
+protected:
+    explicit TSymbolTableLevel(TSymbolTableLevel&);
+    TSymbolTableLevel& operator=(TSymbolTableLevel&);
+
+    typedef std::map<TString, TSymbol*, std::less<TString>, pool_allocator<std::pair<const TString, TSymbol*> > > tLevel;
+    typedef const tLevel::value_type tLevelPair;
+    typedef std::pair<tLevel::iterator, bool> tInsertResult;
+
+    tLevel level;  // named mappings
+    TPrecisionQualifier *defaultPrecision;
+    int anonId;
+    bool thisLevel;  // True if this level of the symbol table is a structure scope containing member function
+                     // that are supposed to see anonymous access to member variables.
+};
+
+class TSymbolTable {
+public:
+    TSymbolTable() : uniqueId(0), noBuiltInRedeclarations(false), separateNameSpaces(false), adoptedLevels(0)
+    {
+        //
+        // This symbol table cannot be used until push() is called.
+        //
+    }
+    ~TSymbolTable()
+    {
+        // this can be called explicitly; safest to code it so it can be called multiple times
+
+        // don't deallocate levels passed in from elsewhere
+        while (table.size() > adoptedLevels)
+            pop(0);
+    }
+
+    void adoptLevels(TSymbolTable& symTable)
+    {
+        for (unsigned int level = 0; level < symTable.table.size(); ++level) {
+            table.push_back(symTable.table[level]);
+            ++adoptedLevels;
+        }
+        uniqueId = symTable.uniqueId;
+        noBuiltInRedeclarations = symTable.noBuiltInRedeclarations;
+        separateNameSpaces = symTable.separateNameSpaces;
+    }
+
+    //
+    // While level adopting is generic, the methods below enact a the following
+    // convention for levels:
+    //   0: common built-ins shared across all stages, all compiles, only one copy for all symbol tables
+    //   1: per-stage built-ins, shared across all compiles, but a different copy per stage
+    //   2: built-ins specific to a compile, like resources that are context-dependent, or redeclared built-ins
+    //   3: user-shader globals
+    //
+protected:
+    static const int globalLevel = 3;
+    bool isSharedLevel(int level)  { return level <= 1; }              // exclude all per-compile levels
+    bool isBuiltInLevel(int level) { return level <= 2; }              // exclude user globals
+    bool isGlobalLevel(int level)  { return level <= globalLevel; }    // include user globals
+public:
+    bool isEmpty() { return table.size() == 0; }
+    bool atBuiltInLevel() { return isBuiltInLevel(currentLevel()); }
+    bool atGlobalLevel()  { return isGlobalLevel(currentLevel()); }
+
+    void setNoBuiltInRedeclarations() { noBuiltInRedeclarations = true; }
+    void setSeparateNameSpaces() { separateNameSpaces = true; }
+
+    void push()
+    {
+        table.push_back(new TSymbolTableLevel);
+    }
+
+    // Make a new symbol-table level to represent the scope introduced by a structure
+    // containing member functions, such that the member functions can find anonymous
+    // references to member variables.
+    //
+    // 'thisSymbol' should have a name of "" to trigger anonymous structure-member
+    // symbol finds.
+    void pushThis(TSymbol& thisSymbol)
+    {
+        assert(thisSymbol.getName().size() == 0);
+        table.push_back(new TSymbolTableLevel);
+        table.back()->setThisLevel();
+        insert(thisSymbol);
+    }
+
+    void pop(TPrecisionQualifier *p)
+    {
+        table[currentLevel()]->getPreviousDefaultPrecisions(p);
+        delete table.back();
+        table.pop_back();
+    }
+
+    //
+    // Insert a visible symbol into the symbol table so it can
+    // be found later by name.
+    //
+    // Returns false if the was a name collision.
+    //
+    bool insert(TSymbol& symbol)
+    {
+        symbol.setUniqueId(++uniqueId);
+
+        // make sure there isn't a function of this variable name
+        if (! separateNameSpaces && ! symbol.getAsFunction() && table[currentLevel()]->hasFunctionName(symbol.getName()))
+            return false;
+
+        // check for not overloading or redefining a built-in function
+        if (noBuiltInRedeclarations) {
+            if (atGlobalLevel() && currentLevel() > 0) {
+                if (table[0]->hasFunctionName(symbol.getName()))
+                    return false;
+                if (currentLevel() > 1 && table[1]->hasFunctionName(symbol.getName()))
+                    return false;
+            }
+        }
+
+        return table[currentLevel()]->insert(symbol, separateNameSpaces);
+    }
+
+    // Add more members to an already inserted aggregate object
+    bool amend(TSymbol& symbol, int firstNewMember)
+    {
+        // See insert() for comments on basic explanation of insert.
+        // This operates similarly, but more simply.
+        return table[currentLevel()]->amend(symbol, firstNewMember);
+    }
+
+    //
+    // To allocate an internal temporary, which will need to be uniquely
+    // identified by the consumer of the AST, but never need to
+    // found by doing a symbol table search by name, hence allowed an
+    // arbitrary name in the symbol with no worry of collision.
+    //
+    void makeInternalVariable(TSymbol& symbol)
+    {
+        symbol.setUniqueId(++uniqueId);
+    }
+
+    //
+    // Copy a variable or anonymous member's structure from a shared level so that
+    // it can be added (soon after return) to the symbol table where it can be
+    // modified without impacting other users of the shared table.
+    //
+    TSymbol* copyUpDeferredInsert(TSymbol* shared)
+    {
+        if (shared->getAsVariable()) {
+            TSymbol* copy = shared->clone();
+            copy->setUniqueId(shared->getUniqueId());
+            return copy;
+        } else {
+            const TAnonMember* anon = shared->getAsAnonMember();
+            assert(anon);
+            TVariable* container = anon->getAnonContainer().clone();
+            container->changeName(NewPoolTString(""));
+            container->setUniqueId(anon->getAnonContainer().getUniqueId());
+            return container;
+        }
+    }
+
+    TSymbol* copyUp(TSymbol* shared)
+    {
+        TSymbol* copy = copyUpDeferredInsert(shared);
+        table[globalLevel]->insert(*copy, separateNameSpaces);
+        if (shared->getAsVariable())
+            return copy;
+        else {
+            // return the copy of the anonymous member
+            return table[globalLevel]->find(shared->getName());
+        }
+    }
+
+    // Normal find of a symbol, that can optionally say whether the symbol was found
+    // at a built-in level or the current top-scope level.
+    TSymbol* find(const TString& name, bool* builtIn = 0, bool* currentScope = 0, int* thisDepthP = 0)
+    {
+        int level = currentLevel();
+        TSymbol* symbol;
+        int thisDepth = 0;
+        do {
+            if (table[level]->isThisLevel())
+                ++thisDepth;
+            symbol = table[level]->find(name);
+            --level;
+        } while (symbol == nullptr && level >= 0);
+        level++;
+        if (builtIn)
+            *builtIn = isBuiltInLevel(level);
+        if (currentScope)
+            *currentScope = isGlobalLevel(currentLevel()) || level == currentLevel();  // consider shared levels as "current scope" WRT user globals
+        if (thisDepthP != nullptr) {
+            if (! table[level]->isThisLevel())
+                thisDepth = 0;
+            *thisDepthP = thisDepth;
+        }
+
+        return symbol;
+    }
+
+    // Find of a symbol that returns how many layers deep of nested
+    // structures-with-member-functions ('this' scopes) deep the symbol was
+    // found in.
+    TSymbol* find(const TString& name, int& thisDepth)
+    {
+        int level = currentLevel();
+        TSymbol* symbol;
+        thisDepth = 0;
+        do {
+            if (table[level]->isThisLevel())
+                ++thisDepth;
+            symbol = table[level]->find(name);
+            --level;
+        } while (symbol == 0 && level >= 0);
+
+        if (! table[level + 1]->isThisLevel())
+            thisDepth = 0;
+
+        return symbol;
+    }
+
+    bool isFunctionNameVariable(const TString& name) const
+    {
+        if (separateNameSpaces)
+            return false;
+
+        int level = currentLevel();
+        do {
+            bool variable;
+            bool found = table[level]->findFunctionVariableName(name, variable);
+            if (found)
+                return variable;
+            --level;
+        } while (level >= 0);
+
+        return false;
+    }
+
+    void findFunctionNameList(const TString& name, TVector<const TFunction*>& list, bool& builtIn)
+    {
+        // For user levels, return the set found in the first scope with a match
+        builtIn = false;
+        int level = currentLevel();
+        do {
+            table[level]->findFunctionNameList(name, list);
+            --level;
+        } while (list.empty() && level >= globalLevel);
+
+        if (! list.empty())
+            return;
+
+        // Gather across all built-in levels; they don't hide each other
+        builtIn = true;
+        do {
+            table[level]->findFunctionNameList(name, list);
+            --level;
+        } while (level >= 0);
+    }
+
+    void relateToOperator(const char* name, TOperator op)
+    {
+        for (unsigned int level = 0; level < table.size(); ++level)
+            table[level]->relateToOperator(name, op);
+    }
+
+    void setFunctionExtensions(const char* name, int num, const char* const extensions[])
+    {
+        for (unsigned int level = 0; level < table.size(); ++level)
+            table[level]->setFunctionExtensions(name, num, extensions);
+    }
+
+    void setVariableExtensions(const char* name, int numExts, const char* const extensions[])
+    {
+        TSymbol* symbol = find(TString(name));
+        if (symbol == nullptr)
+            return;
+
+        symbol->setExtensions(numExts, extensions);
+    }
+
+    void setVariableExtensions(const char* blockName, const char* name, int numExts, const char* const extensions[])
+    {
+        TSymbol* symbol = find(TString(blockName));
+        if (symbol == nullptr)
+            return;
+        TVariable* variable = symbol->getAsVariable();
+        assert(variable != nullptr);
+
+        const TTypeList& structure = *variable->getAsVariable()->getType().getStruct();
+        for (int member = 0; member < (int)structure.size(); ++member) {
+            if (structure[member].type->getFieldName().compare(name) == 0) {
+                variable->setMemberExtensions(member, numExts, extensions);
+                return;
+            }
+        }
+    }
+
+    int getMaxSymbolId() { return uniqueId; }
+#ifndef GLSLANG_WEB
+    void dump(TInfoSink& infoSink, bool complete = false) const;
+#endif
+    void copyTable(const TSymbolTable& copyOf);
+
+    void setPreviousDefaultPrecisions(TPrecisionQualifier *p) { table[currentLevel()]->setPreviousDefaultPrecisions(p); }
+
+    void readOnly()
+    {
+        for (unsigned int level = 0; level < table.size(); ++level)
+            table[level]->readOnly();
+    }
+
+protected:
+    TSymbolTable(TSymbolTable&);
+    TSymbolTable& operator=(TSymbolTableLevel&);
+
+    int currentLevel() const { return static_cast<int>(table.size()) - 1; }
+
+    std::vector<TSymbolTableLevel*> table;
+    int uniqueId;     // for unique identification in code generation
+    bool noBuiltInRedeclarations;
+    bool separateNameSpaces;
+    unsigned int adoptedLevels;
+};
+
+} // end namespace glslang
+
+#endif // _SYMBOL_TABLE_INCLUDED_

dep/glslang/glslang/MachineIndependent/Versions.h

@@ -0,0 +1,331 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// Copyright (C) 2012-2013 LunarG, Inc.
+// Copyright (C) 2017 ARM Limited.
+// Copyright (C) 2015-2018 Google, Inc.
+// Modifications Copyright (C) 2020 Advanced Micro Devices, Inc. All rights reserved.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+#ifndef _VERSIONS_INCLUDED_
+#define _VERSIONS_INCLUDED_
+
+#define LAST_ELEMENT_MARKER(x) x
+
+//
+// Help manage multiple profiles, versions, extensions etc.
+//
+
+//
+// Profiles are set up for masking operations, so queries can be done on multiple
+// profiles at the same time.
+//
+// Don't maintain an ordinal set of enums (0,1,2,3...) to avoid all possible
+// defects from mixing the two different forms.
+//
+typedef enum : unsigned {
+    EBadProfile           = 0,
+    ENoProfile            = (1 << 0), // only for desktop, before profiles showed up
+    ECoreProfile          = (1 << 1),
+    ECompatibilityProfile = (1 << 2),
+    EEsProfile            = (1 << 3),
+    LAST_ELEMENT_MARKER(EProfileCount),
+} EProfile;
+
+namespace glslang {
+
+//
+// Map from profile enum to externally readable text name.
+//
+inline const char* ProfileName(EProfile profile)
+{
+    switch (profile) {
+    case ENoProfile:             return "none";
+    case ECoreProfile:           return "core";
+    case ECompatibilityProfile:  return "compatibility";
+    case EEsProfile:             return "es";
+    default:                     return "unknown profile";
+    }
+}
+
+//
+// What source rules, validation rules, target language, etc. are needed or
+// desired for SPIR-V?
+//
+// 0 means a target or rule set is not enabled (ignore rules from that entity).
+// Non-0 means to apply semantic rules arising from that version of its rule set.
+// The union of all requested rule sets will be applied.
+//
+struct SpvVersion {
+    SpvVersion() : spv(0), vulkanGlsl(0), vulkan(0), openGl(0) {}
+    unsigned int spv; // the version of SPIR-V to target, as defined by "word 1" of the SPIR-V binary header
+    int vulkanGlsl;   // the version of GLSL semantics for Vulkan, from GL_KHR_vulkan_glsl, for "#define VULKAN XXX"
+    int vulkan;       // the version of Vulkan, for which SPIR-V execution environment rules to use
+    int openGl;       // the version of GLSL semantics for OpenGL, from GL_ARB_gl_spirv, for "#define GL_SPIRV XXX"
+};
+
+//
+// The behaviors from the GLSL "#extension extension_name : behavior"
+//
+typedef enum {
+    EBhMissing = 0,
+    EBhRequire,
+    EBhEnable,
+    EBhWarn,
+    EBhDisable,
+    EBhDisablePartial    // use as initial state of an extension that is only partially implemented
+} TExtensionBehavior;
+
+//
+// Symbolic names for extensions.  Strings may be directly used when calling the
+// functions, but better to have the compiler do spelling checks.
+//
+const char* const E_GL_OES_texture_3D                   = "GL_OES_texture_3D";
+const char* const E_GL_OES_standard_derivatives         = "GL_OES_standard_derivatives";
+const char* const E_GL_EXT_frag_depth                   = "GL_EXT_frag_depth";
+const char* const E_GL_OES_EGL_image_external           = "GL_OES_EGL_image_external";
+const char* const E_GL_OES_EGL_image_external_essl3     = "GL_OES_EGL_image_external_essl3";
+const char* const E_GL_EXT_YUV_target                   = "GL_EXT_YUV_target";
+const char* const E_GL_EXT_shader_texture_lod           = "GL_EXT_shader_texture_lod";
+const char* const E_GL_EXT_shadow_samplers              = "GL_EXT_shadow_samplers";
+
+const char* const E_GL_ARB_texture_rectangle            = "GL_ARB_texture_rectangle";
+const char* const E_GL_3DL_array_objects                = "GL_3DL_array_objects";
+const char* const E_GL_ARB_shading_language_420pack     = "GL_ARB_shading_language_420pack";
+const char* const E_GL_ARB_texture_gather               = "GL_ARB_texture_gather";
+const char* const E_GL_ARB_gpu_shader5                  = "GL_ARB_gpu_shader5";
+const char* const E_GL_ARB_separate_shader_objects      = "GL_ARB_separate_shader_objects";
+const char* const E_GL_ARB_compute_shader               = "GL_ARB_compute_shader";
+const char* const E_GL_ARB_tessellation_shader          = "GL_ARB_tessellation_shader";
+const char* const E_GL_ARB_enhanced_layouts             = "GL_ARB_enhanced_layouts";
+const char* const E_GL_ARB_texture_cube_map_array       = "GL_ARB_texture_cube_map_array";
+const char* const E_GL_ARB_texture_multisample          = "GL_ARB_texture_multisample";
+const char* const E_GL_ARB_shader_texture_lod           = "GL_ARB_shader_texture_lod";
+const char* const E_GL_ARB_explicit_attrib_location     = "GL_ARB_explicit_attrib_location";
+const char* const E_GL_ARB_explicit_uniform_location    = "GL_ARB_explicit_uniform_location";
+const char* const E_GL_ARB_shader_image_load_store      = "GL_ARB_shader_image_load_store";
+const char* const E_GL_ARB_shader_atomic_counters       = "GL_ARB_shader_atomic_counters";
+const char* const E_GL_ARB_shader_draw_parameters       = "GL_ARB_shader_draw_parameters";
+const char* const E_GL_ARB_shader_group_vote            = "GL_ARB_shader_group_vote";
+const char* const E_GL_ARB_derivative_control           = "GL_ARB_derivative_control";
+const char* const E_GL_ARB_shader_texture_image_samples = "GL_ARB_shader_texture_image_samples";
+const char* const E_GL_ARB_viewport_array               = "GL_ARB_viewport_array";
+const char* const E_GL_ARB_gpu_shader_int64             = "GL_ARB_gpu_shader_int64";
+const char* const E_GL_ARB_gpu_shader_fp64              = "GL_ARB_gpu_shader_fp64";
+const char* const E_GL_ARB_shader_ballot                = "GL_ARB_shader_ballot";
+const char* const E_GL_ARB_sparse_texture2              = "GL_ARB_sparse_texture2";
+const char* const E_GL_ARB_sparse_texture_clamp         = "GL_ARB_sparse_texture_clamp";
+const char* const E_GL_ARB_shader_stencil_export        = "GL_ARB_shader_stencil_export";
+// const char* const E_GL_ARB_cull_distance            = "GL_ARB_cull_distance";  // present for 4.5, but need extension control over block members
+const char* const E_GL_ARB_post_depth_coverage          = "GL_ARB_post_depth_coverage";
+const char* const E_GL_ARB_shader_viewport_layer_array  = "GL_ARB_shader_viewport_layer_array";
+const char* const E_GL_ARB_fragment_shader_interlock    = "GL_ARB_fragment_shader_interlock";
+const char* const E_GL_ARB_shader_clock                 = "GL_ARB_shader_clock";
+const char* const E_GL_ARB_uniform_buffer_object        = "GL_ARB_uniform_buffer_object";
+const char* const E_GL_ARB_sample_shading               = "GL_ARB_sample_shading";
+const char* const E_GL_ARB_shader_bit_encoding          = "GL_ARB_shader_bit_encoding";
+const char* const E_GL_ARB_shader_image_size            = "GL_ARB_shader_image_size";
+const char* const E_GL_ARB_shader_storage_buffer_object = "GL_ARB_shader_storage_buffer_object";
+const char* const E_GL_ARB_shading_language_packing     = "GL_ARB_shading_language_packing";
+const char* const E_GL_ARB_texture_query_lod            = "GL_ARB_texture_query_lod";
+const char* const E_GL_ARB_vertex_attrib_64bit          = "GL_ARB_vertex_attrib_64bit";
+
+const char* const E_GL_KHR_shader_subgroup_basic            = "GL_KHR_shader_subgroup_basic";
+const char* const E_GL_KHR_shader_subgroup_vote             = "GL_KHR_shader_subgroup_vote";
+const char* const E_GL_KHR_shader_subgroup_arithmetic       = "GL_KHR_shader_subgroup_arithmetic";
+const char* const E_GL_KHR_shader_subgroup_ballot           = "GL_KHR_shader_subgroup_ballot";
+const char* const E_GL_KHR_shader_subgroup_shuffle          = "GL_KHR_shader_subgroup_shuffle";
+const char* const E_GL_KHR_shader_subgroup_shuffle_relative = "GL_KHR_shader_subgroup_shuffle_relative";
+const char* const E_GL_KHR_shader_subgroup_clustered        = "GL_KHR_shader_subgroup_clustered";
+const char* const E_GL_KHR_shader_subgroup_quad             = "GL_KHR_shader_subgroup_quad";
+const char* const E_GL_KHR_memory_scope_semantics           = "GL_KHR_memory_scope_semantics";
+
+const char* const E_GL_EXT_shader_atomic_int64              = "GL_EXT_shader_atomic_int64";
+
+const char* const E_GL_EXT_shader_non_constant_global_initializers = "GL_EXT_shader_non_constant_global_initializers";
+const char* const E_GL_EXT_shader_image_load_formatted = "GL_EXT_shader_image_load_formatted";
+
+const char* const E_GL_EXT_shader_16bit_storage             = "GL_EXT_shader_16bit_storage";
+const char* const E_GL_EXT_shader_8bit_storage              = "GL_EXT_shader_8bit_storage";
+
+
+// EXT extensions
+const char* const E_GL_EXT_device_group                     = "GL_EXT_device_group";
+const char* const E_GL_EXT_multiview                        = "GL_EXT_multiview";
+const char* const E_GL_EXT_post_depth_coverage              = "GL_EXT_post_depth_coverage";
+const char* const E_GL_EXT_control_flow_attributes          = "GL_EXT_control_flow_attributes";
+const char* const E_GL_EXT_nonuniform_qualifier             = "GL_EXT_nonuniform_qualifier";
+const char* const E_GL_EXT_samplerless_texture_functions    = "GL_EXT_samplerless_texture_functions";
+const char* const E_GL_EXT_scalar_block_layout              = "GL_EXT_scalar_block_layout";
+const char* const E_GL_EXT_fragment_invocation_density      = "GL_EXT_fragment_invocation_density";
+const char* const E_GL_EXT_buffer_reference                 = "GL_EXT_buffer_reference";
+const char* const E_GL_EXT_buffer_reference2                = "GL_EXT_buffer_reference2";
+const char* const E_GL_EXT_buffer_reference_uvec2           = "GL_EXT_buffer_reference_uvec2";
+const char* const E_GL_EXT_demote_to_helper_invocation      = "GL_EXT_demote_to_helper_invocation";
+const char* const E_GL_EXT_shader_realtime_clock            = "GL_EXT_shader_realtime_clock";
+const char* const E_GL_EXT_debug_printf                     = "GL_EXT_debug_printf";
+const char* const E_GL_EXT_ray_tracing                      = "GL_EXT_ray_tracing";
+const char* const E_GL_EXT_ray_query                        = "GL_EXT_ray_query";
+const char* const E_GL_EXT_ray_flags_primitive_culling      = "GL_EXT_ray_flags_primitive_culling";
+const char* const E_GL_EXT_blend_func_extended              = "GL_EXT_blend_func_extended";
+const char* const E_GL_EXT_shader_implicit_conversions      = "GL_EXT_shader_implicit_conversions";
+
+// Arrays of extensions for the above viewportEXTs duplications
+
+const char* const post_depth_coverageEXTs[] = { E_GL_ARB_post_depth_coverage, E_GL_EXT_post_depth_coverage };
+const int Num_post_depth_coverageEXTs = sizeof(post_depth_coverageEXTs) / sizeof(post_depth_coverageEXTs[0]);
+
+// OVR extensions
+const char* const E_GL_OVR_multiview                    = "GL_OVR_multiview";
+const char* const E_GL_OVR_multiview2                   = "GL_OVR_multiview2";
+
+const char* const OVR_multiview_EXTs[] = { E_GL_OVR_multiview, E_GL_OVR_multiview2 };
+const int Num_OVR_multiview_EXTs = sizeof(OVR_multiview_EXTs) / sizeof(OVR_multiview_EXTs[0]);
+
+// #line and #include
+const char* const E_GL_GOOGLE_cpp_style_line_directive          = "GL_GOOGLE_cpp_style_line_directive";
+const char* const E_GL_GOOGLE_include_directive                 = "GL_GOOGLE_include_directive";
+
+const char* const E_GL_AMD_shader_ballot                        = "GL_AMD_shader_ballot";
+const char* const E_GL_AMD_shader_trinary_minmax                = "GL_AMD_shader_trinary_minmax";
+const char* const E_GL_AMD_shader_explicit_vertex_parameter     = "GL_AMD_shader_explicit_vertex_parameter";
+const char* const E_GL_AMD_gcn_shader                           = "GL_AMD_gcn_shader";
+const char* const E_GL_AMD_gpu_shader_half_float                = "GL_AMD_gpu_shader_half_float";
+const char* const E_GL_AMD_texture_gather_bias_lod              = "GL_AMD_texture_gather_bias_lod";
+const char* const E_GL_AMD_gpu_shader_int16                     = "GL_AMD_gpu_shader_int16";
+const char* const E_GL_AMD_shader_image_load_store_lod          = "GL_AMD_shader_image_load_store_lod";
+const char* const E_GL_AMD_shader_fragment_mask                 = "GL_AMD_shader_fragment_mask";
+const char* const E_GL_AMD_gpu_shader_half_float_fetch          = "GL_AMD_gpu_shader_half_float_fetch";
+
+const char* const E_GL_INTEL_shader_integer_functions2          = "GL_INTEL_shader_integer_functions2";
+
+const char* const E_GL_NV_sample_mask_override_coverage         = "GL_NV_sample_mask_override_coverage";
+const char* const E_SPV_NV_geometry_shader_passthrough          = "GL_NV_geometry_shader_passthrough";
+const char* const E_GL_NV_viewport_array2                       = "GL_NV_viewport_array2";
+const char* const E_GL_NV_stereo_view_rendering                 = "GL_NV_stereo_view_rendering";
+const char* const E_GL_NVX_multiview_per_view_attributes        = "GL_NVX_multiview_per_view_attributes";
+const char* const E_GL_NV_shader_atomic_int64                   = "GL_NV_shader_atomic_int64";
+const char* const E_GL_NV_conservative_raster_underestimation   = "GL_NV_conservative_raster_underestimation";
+const char* const E_GL_NV_shader_noperspective_interpolation    = "GL_NV_shader_noperspective_interpolation";
+const char* const E_GL_NV_shader_subgroup_partitioned           = "GL_NV_shader_subgroup_partitioned";
+const char* const E_GL_NV_shading_rate_image                    = "GL_NV_shading_rate_image";
+const char* const E_GL_NV_ray_tracing                           = "GL_NV_ray_tracing";
+const char* const E_GL_NV_fragment_shader_barycentric           = "GL_NV_fragment_shader_barycentric";
+const char* const E_GL_NV_compute_shader_derivatives            = "GL_NV_compute_shader_derivatives";
+const char* const E_GL_NV_shader_texture_footprint              = "GL_NV_shader_texture_footprint";
+const char* const E_GL_NV_mesh_shader                           = "GL_NV_mesh_shader";
+
+// Arrays of extensions for the above viewportEXTs duplications
+
+const char* const viewportEXTs[] = { E_GL_ARB_shader_viewport_layer_array, E_GL_NV_viewport_array2 };
+const int Num_viewportEXTs = sizeof(viewportEXTs) / sizeof(viewportEXTs[0]);
+
+const char* const E_GL_NV_cooperative_matrix                    = "GL_NV_cooperative_matrix";
+const char* const E_GL_NV_shader_sm_builtins                    = "GL_NV_shader_sm_builtins";
+const char* const E_GL_NV_integer_cooperative_matrix            = "GL_NV_integer_cooperative_matrix";
+
+// AEP
+const char* const E_GL_ANDROID_extension_pack_es31a             = "GL_ANDROID_extension_pack_es31a";
+const char* const E_GL_KHR_blend_equation_advanced              = "GL_KHR_blend_equation_advanced";
+const char* const E_GL_OES_sample_variables                     = "GL_OES_sample_variables";
+const char* const E_GL_OES_shader_image_atomic                  = "GL_OES_shader_image_atomic";
+const char* const E_GL_OES_shader_multisample_interpolation     = "GL_OES_shader_multisample_interpolation";
+const char* const E_GL_OES_texture_storage_multisample_2d_array = "GL_OES_texture_storage_multisample_2d_array";
+const char* const E_GL_EXT_geometry_shader                      = "GL_EXT_geometry_shader";
+const char* const E_GL_EXT_geometry_point_size                  = "GL_EXT_geometry_point_size";
+const char* const E_GL_EXT_gpu_shader5                          = "GL_EXT_gpu_shader5";
+const char* const E_GL_EXT_primitive_bounding_box               = "GL_EXT_primitive_bounding_box";
+const char* const E_GL_EXT_shader_io_blocks                     = "GL_EXT_shader_io_blocks";
+const char* const E_GL_EXT_tessellation_shader                  = "GL_EXT_tessellation_shader";
+const char* const E_GL_EXT_tessellation_point_size              = "GL_EXT_tessellation_point_size";
+const char* const E_GL_EXT_texture_buffer                       = "GL_EXT_texture_buffer";
+const char* const E_GL_EXT_texture_cube_map_array               = "GL_EXT_texture_cube_map_array";
+const char* const E_GL_EXT_shader_integer_mix                   = "GL_EXT_shader_integer_mix"; 
+
+// OES matching AEP
+const char* const E_GL_OES_geometry_shader                      = "GL_OES_geometry_shader";
+const char* const E_GL_OES_geometry_point_size                  = "GL_OES_geometry_point_size";
+const char* const E_GL_OES_gpu_shader5                          = "GL_OES_gpu_shader5";
+const char* const E_GL_OES_primitive_bounding_box               = "GL_OES_primitive_bounding_box";
+const char* const E_GL_OES_shader_io_blocks                     = "GL_OES_shader_io_blocks";
+const char* const E_GL_OES_tessellation_shader                  = "GL_OES_tessellation_shader";
+const char* const E_GL_OES_tessellation_point_size              = "GL_OES_tessellation_point_size";
+const char* const E_GL_OES_texture_buffer                       = "GL_OES_texture_buffer";
+const char* const E_GL_OES_texture_cube_map_array               = "GL_OES_texture_cube_map_array";
+
+// EXT
+const char* const E_GL_EXT_shader_explicit_arithmetic_types          = "GL_EXT_shader_explicit_arithmetic_types";
+const char* const E_GL_EXT_shader_explicit_arithmetic_types_int8     = "GL_EXT_shader_explicit_arithmetic_types_int8";
+const char* const E_GL_EXT_shader_explicit_arithmetic_types_int16    = "GL_EXT_shader_explicit_arithmetic_types_int16";
+const char* const E_GL_EXT_shader_explicit_arithmetic_types_int32    = "GL_EXT_shader_explicit_arithmetic_types_int32";
+const char* const E_GL_EXT_shader_explicit_arithmetic_types_int64    = "GL_EXT_shader_explicit_arithmetic_types_int64";
+const char* const E_GL_EXT_shader_explicit_arithmetic_types_float16  = "GL_EXT_shader_explicit_arithmetic_types_float16";
+const char* const E_GL_EXT_shader_explicit_arithmetic_types_float32  = "GL_EXT_shader_explicit_arithmetic_types_float32";
+const char* const E_GL_EXT_shader_explicit_arithmetic_types_float64  = "GL_EXT_shader_explicit_arithmetic_types_float64";
+
+const char* const E_GL_EXT_shader_subgroup_extended_types_int8    = "GL_EXT_shader_subgroup_extended_types_int8";
+const char* const E_GL_EXT_shader_subgroup_extended_types_int16   = "GL_EXT_shader_subgroup_extended_types_int16";
+const char* const E_GL_EXT_shader_subgroup_extended_types_int64   = "GL_EXT_shader_subgroup_extended_types_int64";
+const char* const E_GL_EXT_shader_subgroup_extended_types_float16 = "GL_EXT_shader_subgroup_extended_types_float16";
+
+// Arrays of extensions for the above AEP duplications
+
+const char* const AEP_geometry_shader[] = { E_GL_EXT_geometry_shader, E_GL_OES_geometry_shader };
+const int Num_AEP_geometry_shader = sizeof(AEP_geometry_shader)/sizeof(AEP_geometry_shader[0]);
+
+const char* const AEP_geometry_point_size[] = { E_GL_EXT_geometry_point_size, E_GL_OES_geometry_point_size };
+const int Num_AEP_geometry_point_size = sizeof(AEP_geometry_point_size)/sizeof(AEP_geometry_point_size[0]);
+
+const char* const AEP_gpu_shader5[] = { E_GL_EXT_gpu_shader5, E_GL_OES_gpu_shader5 };
+const int Num_AEP_gpu_shader5 = sizeof(AEP_gpu_shader5)/sizeof(AEP_gpu_shader5[0]);
+
+const char* const AEP_primitive_bounding_box[] = { E_GL_EXT_primitive_bounding_box, E_GL_OES_primitive_bounding_box };
+const int Num_AEP_primitive_bounding_box = sizeof(AEP_primitive_bounding_box)/sizeof(AEP_primitive_bounding_box[0]);
+
+const char* const AEP_shader_io_blocks[] = { E_GL_EXT_shader_io_blocks, E_GL_OES_shader_io_blocks };
+const int Num_AEP_shader_io_blocks = sizeof(AEP_shader_io_blocks)/sizeof(AEP_shader_io_blocks[0]);
+
+const char* const AEP_tessellation_shader[] = { E_GL_EXT_tessellation_shader, E_GL_OES_tessellation_shader };
+const int Num_AEP_tessellation_shader = sizeof(AEP_tessellation_shader)/sizeof(AEP_tessellation_shader[0]);
+
+const char* const AEP_tessellation_point_size[] = { E_GL_EXT_tessellation_point_size, E_GL_OES_tessellation_point_size };
+const int Num_AEP_tessellation_point_size = sizeof(AEP_tessellation_point_size)/sizeof(AEP_tessellation_point_size[0]);
+
+const char* const AEP_texture_buffer[] = { E_GL_EXT_texture_buffer, E_GL_OES_texture_buffer };
+const int Num_AEP_texture_buffer = sizeof(AEP_texture_buffer)/sizeof(AEP_texture_buffer[0]);
+
+const char* const AEP_texture_cube_map_array[] = { E_GL_EXT_texture_cube_map_array, E_GL_OES_texture_cube_map_array };
+const int Num_AEP_texture_cube_map_array = sizeof(AEP_texture_cube_map_array)/sizeof(AEP_texture_cube_map_array[0]);
+
+} // end namespace glslang
+
+#endif // _VERSIONS_INCLUDED_

dep/glslang/glslang/MachineIndependent/attribute.cpp

@@ -0,0 +1,346 @@
+//
+// Copyright (C) 2017 LunarG, Inc.
+// Copyright (C) 2018 Google, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of Google, Inc., nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+#ifndef GLSLANG_WEB
+
+#include "attribute.h"
+#include "../Include/intermediate.h"
+#include "ParseHelper.h"
+
+namespace glslang {
+
+// extract integers out of attribute arguments stored in attribute aggregate
+bool TAttributeArgs::getInt(int& value, int argNum) const 
+{
+    const TConstUnion* intConst = getConstUnion(EbtInt, argNum);
+
+    if (intConst == nullptr)
+        return false;
+
+    value = intConst->getIConst();
+    return true;
+}
+
+
+// extract strings out of attribute arguments stored in attribute aggregate.
+// convert to lower case if converToLower is true (for case-insensitive compare convenience)
+bool TAttributeArgs::getString(TString& value, int argNum, bool convertToLower) const 
+{
+    const TConstUnion* stringConst = getConstUnion(EbtString, argNum);
+
+    if (stringConst == nullptr)
+        return false;
+
+    value = *stringConst->getSConst();
+
+    // Convenience.
+    if (convertToLower)
+        std::transform(value.begin(), value.end(), value.begin(), ::tolower);
+
+    return true;
+}
+
+// How many arguments were supplied?
+int TAttributeArgs::size() const
+{
+    return args == nullptr ? 0 : (int)args->getSequence().size();
+}
+
+// Helper to get attribute const union.  Returns nullptr on failure.
+const TConstUnion* TAttributeArgs::getConstUnion(TBasicType basicType, int argNum) const
+{
+    if (args == nullptr)
+        return nullptr;
+
+    if (argNum >= (int)args->getSequence().size())
+        return nullptr;
+
+    if (args->getSequence()[argNum]->getAsConstantUnion() == nullptr)
+        return nullptr;
+
+    const TConstUnion* constVal = &args->getSequence()[argNum]->getAsConstantUnion()->getConstArray()[0];
+    if (constVal == nullptr || constVal->getType() != basicType)
+        return nullptr;
+
+    return constVal;
+}
+
+// Implementation of TParseContext parts of attributes
+TAttributeType TParseContext::attributeFromName(const TString& name) const
+{
+    if (name == "branch" || name == "dont_flatten")
+        return EatBranch;
+    else if (name == "flatten")
+        return EatFlatten;
+    else if (name == "unroll")
+        return EatUnroll;
+    else if (name == "loop" || name == "dont_unroll")
+        return EatLoop;
+    else if (name == "dependency_infinite")
+        return EatDependencyInfinite;
+    else if (name == "dependency_length")
+        return EatDependencyLength;
+    else if (name == "min_iterations")
+        return EatMinIterations;
+    else if (name == "max_iterations")
+        return EatMaxIterations;
+    else if (name == "iteration_multiple")
+        return EatIterationMultiple;
+    else if (name == "peel_count")
+        return EatPeelCount;
+    else if (name == "partial_count")
+        return EatPartialCount;
+    else
+        return EatNone;
+}
+
+// Make an initial leaf for the grammar from a no-argument attribute
+TAttributes* TParseContext::makeAttributes(const TString& identifier) const
+{
+    TAttributes *attributes = nullptr;
+    attributes = NewPoolObject(attributes);
+    TAttributeArgs args = { attributeFromName(identifier), nullptr };
+    attributes->push_back(args);
+    return attributes;
+}
+
+// Make an initial leaf for the grammar from a one-argument attribute
+TAttributes* TParseContext::makeAttributes(const TString& identifier, TIntermNode* node) const
+{
+    TAttributes *attributes = nullptr;
+    attributes = NewPoolObject(attributes);
+
+    // for now, node is always a simple single expression, but other code expects
+    // a list, so make it so
+    TIntermAggregate* agg = intermediate.makeAggregate(node);
+    TAttributeArgs args = { attributeFromName(identifier), agg };
+    attributes->push_back(args);
+    return attributes;
+}
+
+// Merge two sets of attributes into a single set.
+// The second argument is destructively consumed.
+TAttributes* TParseContext::mergeAttributes(TAttributes* attr1, TAttributes* attr2) const
+{
+    attr1->splice(attr1->end(), *attr2);
+    return attr1;
+}
+
+//
+// Selection attributes
+//
+void TParseContext::handleSelectionAttributes(const TAttributes& attributes, TIntermNode* node)
+{
+    TIntermSelection* selection = node->getAsSelectionNode();
+    if (selection == nullptr)
+        return;
+
+    for (auto it = attributes.begin(); it != attributes.end(); ++it) {
+        if (it->size() > 0) {
+            warn(node->getLoc(), "attribute with arguments not recognized, skipping", "", "");
+            continue;
+        }
+
+        switch (it->name) {
+        case EatFlatten:
+            selection->setFlatten();
+            break;
+        case EatBranch:
+            selection->setDontFlatten();
+            break;
+        default:
+            warn(node->getLoc(), "attribute does not apply to a selection", "", "");
+            break;
+        }
+    }
+}
+
+//
+// Switch attributes
+//
+void TParseContext::handleSwitchAttributes(const TAttributes& attributes, TIntermNode* node)
+{
+    TIntermSwitch* selection = node->getAsSwitchNode();
+    if (selection == nullptr)
+        return;
+
+    for (auto it = attributes.begin(); it != attributes.end(); ++it) {
+        if (it->size() > 0) {
+            warn(node->getLoc(), "attribute with arguments not recognized, skipping", "", "");
+            continue;
+        }
+
+        switch (it->name) {
+        case EatFlatten:
+            selection->setFlatten();
+            break;
+        case EatBranch:
+            selection->setDontFlatten();
+            break;
+        default:
+            warn(node->getLoc(), "attribute does not apply to a switch", "", "");
+            break;
+        }
+    }
+}
+
+//
+// Loop attributes
+//
+void TParseContext::handleLoopAttributes(const TAttributes& attributes, TIntermNode* node)
+{
+    TIntermLoop* loop = node->getAsLoopNode();
+    if (loop == nullptr) {
+        // the actual loop might be part of a sequence
+        TIntermAggregate* agg = node->getAsAggregate();
+        if (agg == nullptr)
+            return;
+        for (auto it = agg->getSequence().begin(); it != agg->getSequence().end(); ++it) {
+            loop = (*it)->getAsLoopNode();
+            if (loop != nullptr)
+                break;
+        }
+        if (loop == nullptr)
+            return;
+    }
+
+    for (auto it = attributes.begin(); it != attributes.end(); ++it) {
+
+        const auto noArgument = [&](const char* feature) {
+            if (it->size() > 0) {
+                warn(node->getLoc(), "expected no arguments", feature, "");
+                return false;
+            }
+            return true;
+        };
+
+        const auto positiveSignedArgument = [&](const char* feature, int& value) {
+            if (it->size() == 1 && it->getInt(value)) {
+                if (value <= 0) {
+                    error(node->getLoc(), "must be positive", feature, "");
+                    return false;
+                }
+            } else {
+                warn(node->getLoc(), "expected a single integer argument", feature, "");
+                return false;
+            }
+            return true;
+        };
+
+        const auto unsignedArgument = [&](const char* feature, unsigned int& uiValue) {
+            int value;
+            if (!(it->size() == 1 && it->getInt(value))) {
+                warn(node->getLoc(), "expected a single integer argument", feature, "");
+                return false;
+            }
+            uiValue = (unsigned int)value;
+            return true;
+        };
+
+        const auto positiveUnsignedArgument = [&](const char* feature, unsigned int& uiValue) {
+            int value;
+            if (it->size() == 1 && it->getInt(value)) {
+                if (value == 0) {
+                    error(node->getLoc(), "must be greater than or equal to 1", feature, "");
+                    return false;
+                }
+            } else {
+                warn(node->getLoc(), "expected a single integer argument", feature, "");
+                return false;
+            }
+            uiValue = (unsigned int)value;
+            return true;
+        };
+
+        const auto spirv14 = [&](const char* feature) {
+            if (spvVersion.spv > 0 && spvVersion.spv < EShTargetSpv_1_4)
+                warn(node->getLoc(), "attribute requires a SPIR-V 1.4 target-env", feature, "");
+        };
+
+        int value = 0;
+        unsigned uiValue = 0;
+        switch (it->name) {
+        case EatUnroll:
+            if (noArgument("unroll"))
+                loop->setUnroll();
+            break;
+        case EatLoop:
+            if (noArgument("dont_unroll"))
+                loop->setDontUnroll();
+            break;
+        case EatDependencyInfinite:
+            if (noArgument("dependency_infinite"))
+                loop->setLoopDependency(TIntermLoop::dependencyInfinite);
+            break;
+        case EatDependencyLength:
+            if (positiveSignedArgument("dependency_length", value))
+                loop->setLoopDependency(value);
+            break;
+        case EatMinIterations:
+            spirv14("min_iterations");
+            if (unsignedArgument("min_iterations", uiValue))
+                loop->setMinIterations(uiValue);
+            break;
+        case EatMaxIterations:
+            spirv14("max_iterations");
+            if (unsignedArgument("max_iterations", uiValue))
+                loop->setMaxIterations(uiValue);
+            break;
+        case EatIterationMultiple:
+            spirv14("iteration_multiple");
+            if (positiveUnsignedArgument("iteration_multiple", uiValue))
+                loop->setIterationMultiple(uiValue);
+            break;
+        case EatPeelCount:
+            spirv14("peel_count");
+            if (unsignedArgument("peel_count", uiValue))
+                loop->setPeelCount(uiValue);
+            break;
+        case EatPartialCount:
+            spirv14("partial_count");
+            if (unsignedArgument("partial_count", uiValue))
+                loop->setPartialCount(uiValue);
+            break;
+        default:
+            warn(node->getLoc(), "attribute does not apply to a loop", "", "");
+            break;
+        }
+    }
+}
+
+} // end namespace glslang
+
+#endif // GLSLANG_WEB

dep/glslang/glslang/MachineIndependent/attribute.h

@@ -0,0 +1,149 @@
+//
+// Copyright (C) 2017 LunarG, Inc.
+// Copyright (C) 2018 Google, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+#ifndef _ATTRIBUTE_INCLUDED_
+#define _ATTRIBUTE_INCLUDED_
+
+#include "../Include/Common.h"
+#include "../Include/ConstantUnion.h"
+
+namespace glslang {
+
+    enum TAttributeType {
+        EatNone,
+        EatAllow_uav_condition,
+        EatBranch,
+        EatCall,
+        EatDomain,
+        EatEarlyDepthStencil,
+        EatFastOpt,
+        EatFlatten,
+        EatForceCase,
+        EatInstance,
+        EatMaxTessFactor,
+        EatNumThreads,
+        EatMaxVertexCount,
+        EatOutputControlPoints,
+        EatOutputTopology,
+        EatPartitioning,
+        EatPatchConstantFunc,
+        EatPatchSize,
+        EatUnroll,
+        EatLoop,
+        EatBinding,
+        EatGlobalBinding,
+        EatLocation,
+        EatInputAttachment,
+        EatBuiltIn,
+        EatPushConstant,
+        EatConstantId,
+        EatDependencyInfinite,
+        EatDependencyLength,
+        EatMinIterations,
+        EatMaxIterations,
+        EatIterationMultiple,
+        EatPeelCount,
+        EatPartialCount,
+        EatFormatRgba32f,
+        EatFormatRgba16f,
+        EatFormatR32f,
+        EatFormatRgba8,
+        EatFormatRgba8Snorm,
+        EatFormatRg32f,
+        EatFormatRg16f,
+        EatFormatR11fG11fB10f,
+        EatFormatR16f,
+        EatFormatRgba16,
+        EatFormatRgb10A2,
+        EatFormatRg16,
+        EatFormatRg8,
+        EatFormatR16,
+        EatFormatR8,
+        EatFormatRgba16Snorm,
+        EatFormatRg16Snorm,
+        EatFormatRg8Snorm,
+        EatFormatR16Snorm,
+        EatFormatR8Snorm,
+        EatFormatRgba32i,
+        EatFormatRgba16i,
+        EatFormatRgba8i,
+        EatFormatR32i,
+        EatFormatRg32i,
+        EatFormatRg16i,
+        EatFormatRg8i,
+        EatFormatR16i,
+        EatFormatR8i,
+        EatFormatRgba32ui,
+        EatFormatRgba16ui,
+        EatFormatRgba8ui,
+        EatFormatR32ui,
+        EatFormatRgb10a2ui,
+        EatFormatRg32ui,
+        EatFormatRg16ui,
+        EatFormatRg8ui,
+        EatFormatR16ui,
+        EatFormatR8ui,
+        EatFormatUnknown,
+        EatNonWritable,
+        EatNonReadable
+    };
+
+    class TIntermAggregate;
+
+    struct TAttributeArgs {
+        TAttributeType name;
+        const TIntermAggregate* args;
+
+        // Obtain attribute as integer
+        // Return false if it cannot be obtained
+        bool getInt(int& value, int argNum = 0) const;
+
+        // Obtain attribute as string, with optional to-lower transform
+        // Return false if it cannot be obtained
+        bool getString(TString& value, int argNum = 0, bool convertToLower = true) const;
+
+        // How many arguments were provided to the attribute?
+        int size() const;
+
+    protected:
+        const TConstUnion* getConstUnion(TBasicType basicType, int argNum) const;
+    };
+
+    typedef TList<TAttributeArgs> TAttributes;
+
+} // end namespace glslang
+
+#endif // _ATTRIBUTE_INCLUDED_

dep/glslang/glslang/MachineIndependent/gl_types.h

@@ -0,0 +1,210 @@
+/*
+** Copyright (c) 2013 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+#pragma once
+
+#define GL_FLOAT                          0x1406
+#define GL_FLOAT_VEC2                     0x8B50
+#define GL_FLOAT_VEC3                     0x8B51
+#define GL_FLOAT_VEC4                     0x8B52
+
+#define GL_DOUBLE                         0x140A
+#define GL_DOUBLE_VEC2                    0x8FFC
+#define GL_DOUBLE_VEC3                    0x8FFD
+#define GL_DOUBLE_VEC4                    0x8FFE
+
+#define GL_INT                            0x1404
+#define GL_INT_VEC2                       0x8B53
+#define GL_INT_VEC3                       0x8B54
+#define GL_INT_VEC4                       0x8B55
+
+#define GL_UNSIGNED_INT                   0x1405
+#define GL_UNSIGNED_INT_VEC2              0x8DC6
+#define GL_UNSIGNED_INT_VEC3              0x8DC7
+#define GL_UNSIGNED_INT_VEC4              0x8DC8
+
+#define GL_INT64_ARB                      0x140E
+#define GL_INT64_VEC2_ARB                 0x8FE9
+#define GL_INT64_VEC3_ARB                 0x8FEA
+#define GL_INT64_VEC4_ARB                 0x8FEB
+
+#define GL_UNSIGNED_INT64_ARB             0x140F
+#define GL_UNSIGNED_INT64_VEC2_ARB        0x8FE5
+#define GL_UNSIGNED_INT64_VEC3_ARB        0x8FE6
+#define GL_UNSIGNED_INT64_VEC4_ARB        0x8FE7
+
+#define GL_BOOL                           0x8B56
+#define GL_BOOL_VEC2                      0x8B57
+#define GL_BOOL_VEC3                      0x8B58
+#define GL_BOOL_VEC4                      0x8B59
+
+#define GL_FLOAT_MAT2                     0x8B5A
+#define GL_FLOAT_MAT3                     0x8B5B
+#define GL_FLOAT_MAT4                     0x8B5C
+#define GL_FLOAT_MAT2x3                   0x8B65
+#define GL_FLOAT_MAT2x4                   0x8B66
+#define GL_FLOAT_MAT3x2                   0x8B67
+#define GL_FLOAT_MAT3x4                   0x8B68
+#define GL_FLOAT_MAT4x2                   0x8B69
+#define GL_FLOAT_MAT4x3                   0x8B6A
+
+#define GL_DOUBLE_MAT2                    0x8F46
+#define GL_DOUBLE_MAT3                    0x8F47
+#define GL_DOUBLE_MAT4                    0x8F48
+#define GL_DOUBLE_MAT2x3                  0x8F49
+#define GL_DOUBLE_MAT2x4                  0x8F4A
+#define GL_DOUBLE_MAT3x2                  0x8F4B
+#define GL_DOUBLE_MAT3x4                  0x8F4C
+#define GL_DOUBLE_MAT4x2                  0x8F4D
+#define GL_DOUBLE_MAT4x3                  0x8F4E
+
+// Those constants are borrowed from extension NV_gpu_shader5
+#define GL_FLOAT16_NV                     0x8FF8
+#define GL_FLOAT16_VEC2_NV                0x8FF9
+#define GL_FLOAT16_VEC3_NV                0x8FFA
+#define GL_FLOAT16_VEC4_NV                0x8FFB
+
+#define GL_FLOAT16_MAT2_AMD               0x91C5
+#define GL_FLOAT16_MAT3_AMD               0x91C6
+#define GL_FLOAT16_MAT4_AMD               0x91C7
+#define GL_FLOAT16_MAT2x3_AMD             0x91C8
+#define GL_FLOAT16_MAT2x4_AMD             0x91C9
+#define GL_FLOAT16_MAT3x2_AMD             0x91CA
+#define GL_FLOAT16_MAT3x4_AMD             0x91CB
+#define GL_FLOAT16_MAT4x2_AMD             0x91CC
+#define GL_FLOAT16_MAT4x3_AMD             0x91CD
+
+#define GL_SAMPLER_1D                     0x8B5D
+#define GL_SAMPLER_2D                     0x8B5E
+#define GL_SAMPLER_3D                     0x8B5F
+#define GL_SAMPLER_CUBE                   0x8B60
+#define GL_SAMPLER_BUFFER                 0x8DC2
+#define GL_SAMPLER_1D_ARRAY               0x8DC0
+#define GL_SAMPLER_2D_ARRAY               0x8DC1
+#define GL_SAMPLER_1D_ARRAY_SHADOW        0x8DC3
+#define GL_SAMPLER_2D_ARRAY_SHADOW        0x8DC4
+#define GL_SAMPLER_CUBE_SHADOW            0x8DC5
+#define GL_SAMPLER_1D_SHADOW              0x8B61
+#define GL_SAMPLER_2D_SHADOW              0x8B62
+#define GL_SAMPLER_2D_RECT                0x8B63
+#define GL_SAMPLER_2D_RECT_SHADOW         0x8B64
+#define GL_SAMPLER_2D_MULTISAMPLE         0x9108
+#define GL_SAMPLER_2D_MULTISAMPLE_ARRAY   0x910B
+#define GL_SAMPLER_CUBE_MAP_ARRAY         0x900C
+#define GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW  0x900D
+#define GL_SAMPLER_CUBE_MAP_ARRAY_ARB     0x900C
+#define GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW_ARB 0x900D
+
+#define GL_FLOAT16_SAMPLER_1D_AMD                       0x91CE
+#define GL_FLOAT16_SAMPLER_2D_AMD                       0x91CF
+#define GL_FLOAT16_SAMPLER_3D_AMD                       0x91D0
+#define GL_FLOAT16_SAMPLER_CUBE_AMD                     0x91D1
+#define GL_FLOAT16_SAMPLER_2D_RECT_AMD                  0x91D2
+#define GL_FLOAT16_SAMPLER_1D_ARRAY_AMD                 0x91D3
+#define GL_FLOAT16_SAMPLER_2D_ARRAY_AMD                 0x91D4
+#define GL_FLOAT16_SAMPLER_CUBE_MAP_ARRAY_AMD           0x91D5
+#define GL_FLOAT16_SAMPLER_BUFFER_AMD                   0x91D6
+#define GL_FLOAT16_SAMPLER_2D_MULTISAMPLE_AMD           0x91D7
+#define GL_FLOAT16_SAMPLER_2D_MULTISAMPLE_ARRAY_AMD     0x91D8
+
+#define GL_FLOAT16_SAMPLER_1D_SHADOW_AMD                0x91D9
+#define GL_FLOAT16_SAMPLER_2D_SHADOW_AMD                0x91DA
+#define GL_FLOAT16_SAMPLER_2D_RECT_SHADOW_AMD           0x91DB
+#define GL_FLOAT16_SAMPLER_1D_ARRAY_SHADOW_AMD          0x91DC
+#define GL_FLOAT16_SAMPLER_2D_ARRAY_SHADOW_AMD          0x91DD
+#define GL_FLOAT16_SAMPLER_CUBE_SHADOW_AMD              0x91DE
+#define GL_FLOAT16_SAMPLER_CUBE_MAP_ARRAY_SHADOW_AMD    0x91DF
+
+#define GL_FLOAT16_IMAGE_1D_AMD                         0x91E0
+#define GL_FLOAT16_IMAGE_2D_AMD                         0x91E1
+#define GL_FLOAT16_IMAGE_3D_AMD                         0x91E2
+#define GL_FLOAT16_IMAGE_2D_RECT_AMD                    0x91E3
+#define GL_FLOAT16_IMAGE_CUBE_AMD                       0x91E4
+#define GL_FLOAT16_IMAGE_1D_ARRAY_AMD                   0x91E5
+#define GL_FLOAT16_IMAGE_2D_ARRAY_AMD                   0x91E6
+#define GL_FLOAT16_IMAGE_CUBE_MAP_ARRAY_AMD             0x91E7
+#define GL_FLOAT16_IMAGE_BUFFER_AMD                     0x91E8
+#define GL_FLOAT16_IMAGE_2D_MULTISAMPLE_AMD             0x91E9
+#define GL_FLOAT16_IMAGE_2D_MULTISAMPLE_ARRAY_AMD       0x91EA
+
+#define GL_INT_SAMPLER_1D                 0x8DC9
+#define GL_INT_SAMPLER_2D                 0x8DCA
+#define GL_INT_SAMPLER_3D                 0x8DCB
+#define GL_INT_SAMPLER_CUBE               0x8DCC
+#define GL_INT_SAMPLER_1D_ARRAY           0x8DCE
+#define GL_INT_SAMPLER_2D_ARRAY           0x8DCF
+#define GL_INT_SAMPLER_2D_RECT            0x8DCD
+#define GL_INT_SAMPLER_BUFFER             0x8DD0
+#define GL_INT_SAMPLER_2D_MULTISAMPLE     0x9109
+#define GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY 0x910C
+#define GL_INT_SAMPLER_CUBE_MAP_ARRAY     0x900E
+#define GL_INT_SAMPLER_CUBE_MAP_ARRAY_ARB 0x900E
+
+#define GL_UNSIGNED_INT_SAMPLER_1D        0x8DD1
+#define GL_UNSIGNED_INT_SAMPLER_2D        0x8DD2
+#define GL_UNSIGNED_INT_SAMPLER_3D        0x8DD3
+#define GL_UNSIGNED_INT_SAMPLER_CUBE      0x8DD4
+#define GL_UNSIGNED_INT_SAMPLER_1D_ARRAY  0x8DD6
+#define GL_UNSIGNED_INT_SAMPLER_2D_ARRAY  0x8DD7
+#define GL_UNSIGNED_INT_SAMPLER_2D_RECT   0x8DD5
+#define GL_UNSIGNED_INT_SAMPLER_BUFFER    0x8DD8
+#define GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY 0x910D
+#define GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY 0x900F
+#define GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY_ARB 0x900F
+#define GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE 0x910A
+
+#define GL_IMAGE_1D                       0x904C
+#define GL_IMAGE_2D                       0x904D
+#define GL_IMAGE_3D                       0x904E
+#define GL_IMAGE_2D_RECT                  0x904F
+#define GL_IMAGE_CUBE                     0x9050
+#define GL_IMAGE_BUFFER                   0x9051
+#define GL_IMAGE_1D_ARRAY                 0x9052
+#define GL_IMAGE_2D_ARRAY                 0x9053
+#define GL_IMAGE_CUBE_MAP_ARRAY           0x9054
+#define GL_IMAGE_2D_MULTISAMPLE           0x9055
+#define GL_IMAGE_2D_MULTISAMPLE_ARRAY     0x9056
+#define GL_INT_IMAGE_1D                   0x9057
+#define GL_INT_IMAGE_2D                   0x9058
+#define GL_INT_IMAGE_3D                   0x9059
+#define GL_INT_IMAGE_2D_RECT              0x905A
+#define GL_INT_IMAGE_CUBE                 0x905B
+#define GL_INT_IMAGE_BUFFER               0x905C
+#define GL_INT_IMAGE_1D_ARRAY             0x905D
+#define GL_INT_IMAGE_2D_ARRAY             0x905E
+#define GL_INT_IMAGE_CUBE_MAP_ARRAY       0x905F
+#define GL_INT_IMAGE_2D_MULTISAMPLE       0x9060
+#define GL_INT_IMAGE_2D_MULTISAMPLE_ARRAY 0x9061
+#define GL_UNSIGNED_INT_IMAGE_1D          0x9062
+#define GL_UNSIGNED_INT_IMAGE_2D          0x9063
+#define GL_UNSIGNED_INT_IMAGE_3D          0x9064
+#define GL_UNSIGNED_INT_IMAGE_2D_RECT     0x9065
+#define GL_UNSIGNED_INT_IMAGE_CUBE        0x9066
+#define GL_UNSIGNED_INT_IMAGE_BUFFER      0x9067
+#define GL_UNSIGNED_INT_IMAGE_1D_ARRAY    0x9068
+#define GL_UNSIGNED_INT_IMAGE_2D_ARRAY    0x9069
+#define GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY 0x906A
+#define GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE 0x906B
+#define GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_ARRAY 0x906C
+
+#define GL_UNSIGNED_INT_ATOMIC_COUNTER    0x92DB

dep/glslang/glslang/MachineIndependent/glslang_tab.cpp.h

@@ -0,0 +1,521 @@
+/* A Bison parser, made by GNU Bison 3.0.4.  */
+
+/* Bison interface for Yacc-like parsers in C
+
+   Copyright (C) 1984, 1989-1990, 2000-2015 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* As a special exception, you may create a larger work that contains
+   part or all of the Bison parser skeleton and distribute that work
+   under terms of your choice, so long as that work isn't itself a
+   parser generator using the skeleton or a modified version thereof
+   as a parser skeleton.  Alternatively, if you modify or redistribute
+   the parser skeleton itself, you may (at your option) remove this
+   special exception, which will cause the skeleton and the resulting
+   Bison output files to be licensed under the GNU General Public
+   License without this special exception.
+
+   This special exception was added by the Free Software Foundation in
+   version 2.2 of Bison.  */
+
+#ifndef YY_YY_GLSLANG_TAB_CPP_H_INCLUDED
+# define YY_YY_GLSLANG_TAB_CPP_H_INCLUDED
+/* Debug traces.  */
+#ifndef YYDEBUG
+# define YYDEBUG 1
+#endif
+#if YYDEBUG
+extern int yydebug;
+#endif
+
+/* Token type.  */
+#ifndef YYTOKENTYPE
+# define YYTOKENTYPE
+  enum yytokentype
+  {
+    CONST = 258,
+    BOOL = 259,
+    INT = 260,
+    UINT = 261,
+    FLOAT = 262,
+    BVEC2 = 263,
+    BVEC3 = 264,
+    BVEC4 = 265,
+    IVEC2 = 266,
+    IVEC3 = 267,
+    IVEC4 = 268,
+    UVEC2 = 269,
+    UVEC3 = 270,
+    UVEC4 = 271,
+    VEC2 = 272,
+    VEC3 = 273,
+    VEC4 = 274,
+    MAT2 = 275,
+    MAT3 = 276,
+    MAT4 = 277,
+    MAT2X2 = 278,
+    MAT2X3 = 279,
+    MAT2X4 = 280,
+    MAT3X2 = 281,
+    MAT3X3 = 282,
+    MAT3X4 = 283,
+    MAT4X2 = 284,
+    MAT4X3 = 285,
+    MAT4X4 = 286,
+    SAMPLER2D = 287,
+    SAMPLER3D = 288,
+    SAMPLERCUBE = 289,
+    SAMPLER2DSHADOW = 290,
+    SAMPLERCUBESHADOW = 291,
+    SAMPLER2DARRAY = 292,
+    SAMPLER2DARRAYSHADOW = 293,
+    ISAMPLER2D = 294,
+    ISAMPLER3D = 295,
+    ISAMPLERCUBE = 296,
+    ISAMPLER2DARRAY = 297,
+    USAMPLER2D = 298,
+    USAMPLER3D = 299,
+    USAMPLERCUBE = 300,
+    USAMPLER2DARRAY = 301,
+    SAMPLER = 302,
+    SAMPLERSHADOW = 303,
+    TEXTURE2D = 304,
+    TEXTURE3D = 305,
+    TEXTURECUBE = 306,
+    TEXTURE2DARRAY = 307,
+    ITEXTURE2D = 308,
+    ITEXTURE3D = 309,
+    ITEXTURECUBE = 310,
+    ITEXTURE2DARRAY = 311,
+    UTEXTURE2D = 312,
+    UTEXTURE3D = 313,
+    UTEXTURECUBE = 314,
+    UTEXTURE2DARRAY = 315,
+    ATTRIBUTE = 316,
+    VARYING = 317,
+    FLOAT16_T = 318,
+    FLOAT32_T = 319,
+    DOUBLE = 320,
+    FLOAT64_T = 321,
+    INT64_T = 322,
+    UINT64_T = 323,
+    INT32_T = 324,
+    UINT32_T = 325,
+    INT16_T = 326,
+    UINT16_T = 327,
+    INT8_T = 328,
+    UINT8_T = 329,
+    I64VEC2 = 330,
+    I64VEC3 = 331,
+    I64VEC4 = 332,
+    U64VEC2 = 333,
+    U64VEC3 = 334,
+    U64VEC4 = 335,
+    I32VEC2 = 336,
+    I32VEC3 = 337,
+    I32VEC4 = 338,
+    U32VEC2 = 339,
+    U32VEC3 = 340,
+    U32VEC4 = 341,
+    I16VEC2 = 342,
+    I16VEC3 = 343,
+    I16VEC4 = 344,
+    U16VEC2 = 345,
+    U16VEC3 = 346,
+    U16VEC4 = 347,
+    I8VEC2 = 348,
+    I8VEC3 = 349,
+    I8VEC4 = 350,
+    U8VEC2 = 351,
+    U8VEC3 = 352,
+    U8VEC4 = 353,
+    DVEC2 = 354,
+    DVEC3 = 355,
+    DVEC4 = 356,
+    DMAT2 = 357,
+    DMAT3 = 358,
+    DMAT4 = 359,
+    F16VEC2 = 360,
+    F16VEC3 = 361,
+    F16VEC4 = 362,
+    F16MAT2 = 363,
+    F16MAT3 = 364,
+    F16MAT4 = 365,
+    F32VEC2 = 366,
+    F32VEC3 = 367,
+    F32VEC4 = 368,
+    F32MAT2 = 369,
+    F32MAT3 = 370,
+    F32MAT4 = 371,
+    F64VEC2 = 372,
+    F64VEC3 = 373,
+    F64VEC4 = 374,
+    F64MAT2 = 375,
+    F64MAT3 = 376,
+    F64MAT4 = 377,
+    DMAT2X2 = 378,
+    DMAT2X3 = 379,
+    DMAT2X4 = 380,
+    DMAT3X2 = 381,
+    DMAT3X3 = 382,
+    DMAT3X4 = 383,
+    DMAT4X2 = 384,
+    DMAT4X3 = 385,
+    DMAT4X4 = 386,
+    F16MAT2X2 = 387,
+    F16MAT2X3 = 388,
+    F16MAT2X4 = 389,
+    F16MAT3X2 = 390,
+    F16MAT3X3 = 391,
+    F16MAT3X4 = 392,
+    F16MAT4X2 = 393,
+    F16MAT4X3 = 394,
+    F16MAT4X4 = 395,
+    F32MAT2X2 = 396,
+    F32MAT2X3 = 397,
+    F32MAT2X4 = 398,
+    F32MAT3X2 = 399,
+    F32MAT3X3 = 400,
+    F32MAT3X4 = 401,
+    F32MAT4X2 = 402,
+    F32MAT4X3 = 403,
+    F32MAT4X4 = 404,
+    F64MAT2X2 = 405,
+    F64MAT2X3 = 406,
+    F64MAT2X4 = 407,
+    F64MAT3X2 = 408,
+    F64MAT3X3 = 409,
+    F64MAT3X4 = 410,
+    F64MAT4X2 = 411,
+    F64MAT4X3 = 412,
+    F64MAT4X4 = 413,
+    ATOMIC_UINT = 414,
+    ACCSTRUCTNV = 415,
+    ACCSTRUCTEXT = 416,
+    RAYQUERYEXT = 417,
+    FCOOPMATNV = 418,
+    ICOOPMATNV = 419,
+    UCOOPMATNV = 420,
+    SAMPLERCUBEARRAY = 421,
+    SAMPLERCUBEARRAYSHADOW = 422,
+    ISAMPLERCUBEARRAY = 423,
+    USAMPLERCUBEARRAY = 424,
+    SAMPLER1D = 425,
+    SAMPLER1DARRAY = 426,
+    SAMPLER1DARRAYSHADOW = 427,
+    ISAMPLER1D = 428,
+    SAMPLER1DSHADOW = 429,
+    SAMPLER2DRECT = 430,
+    SAMPLER2DRECTSHADOW = 431,
+    ISAMPLER2DRECT = 432,
+    USAMPLER2DRECT = 433,
+    SAMPLERBUFFER = 434,
+    ISAMPLERBUFFER = 435,
+    USAMPLERBUFFER = 436,
+    SAMPLER2DMS = 437,
+    ISAMPLER2DMS = 438,
+    USAMPLER2DMS = 439,
+    SAMPLER2DMSARRAY = 440,
+    ISAMPLER2DMSARRAY = 441,
+    USAMPLER2DMSARRAY = 442,
+    SAMPLEREXTERNALOES = 443,
+    SAMPLEREXTERNAL2DY2YEXT = 444,
+    ISAMPLER1DARRAY = 445,
+    USAMPLER1D = 446,
+    USAMPLER1DARRAY = 447,
+    F16SAMPLER1D = 448,
+    F16SAMPLER2D = 449,
+    F16SAMPLER3D = 450,
+    F16SAMPLER2DRECT = 451,
+    F16SAMPLERCUBE = 452,
+    F16SAMPLER1DARRAY = 453,
+    F16SAMPLER2DARRAY = 454,
+    F16SAMPLERCUBEARRAY = 455,
+    F16SAMPLERBUFFER = 456,
+    F16SAMPLER2DMS = 457,
+    F16SAMPLER2DMSARRAY = 458,
+    F16SAMPLER1DSHADOW = 459,
+    F16SAMPLER2DSHADOW = 460,
+    F16SAMPLER1DARRAYSHADOW = 461,
+    F16SAMPLER2DARRAYSHADOW = 462,
+    F16SAMPLER2DRECTSHADOW = 463,
+    F16SAMPLERCUBESHADOW = 464,
+    F16SAMPLERCUBEARRAYSHADOW = 465,
+    IMAGE1D = 466,
+    IIMAGE1D = 467,
+    UIMAGE1D = 468,
+    IMAGE2D = 469,
+    IIMAGE2D = 470,
+    UIMAGE2D = 471,
+    IMAGE3D = 472,
+    IIMAGE3D = 473,
+    UIMAGE3D = 474,
+    IMAGE2DRECT = 475,
+    IIMAGE2DRECT = 476,
+    UIMAGE2DRECT = 477,
+    IMAGECUBE = 478,
+    IIMAGECUBE = 479,
+    UIMAGECUBE = 480,
+    IMAGEBUFFER = 481,
+    IIMAGEBUFFER = 482,
+    UIMAGEBUFFER = 483,
+    IMAGE1DARRAY = 484,
+    IIMAGE1DARRAY = 485,
+    UIMAGE1DARRAY = 486,
+    IMAGE2DARRAY = 487,
+    IIMAGE2DARRAY = 488,
+    UIMAGE2DARRAY = 489,
+    IMAGECUBEARRAY = 490,
+    IIMAGECUBEARRAY = 491,
+    UIMAGECUBEARRAY = 492,
+    IMAGE2DMS = 493,
+    IIMAGE2DMS = 494,
+    UIMAGE2DMS = 495,
+    IMAGE2DMSARRAY = 496,
+    IIMAGE2DMSARRAY = 497,
+    UIMAGE2DMSARRAY = 498,
+    F16IMAGE1D = 499,
+    F16IMAGE2D = 500,
+    F16IMAGE3D = 501,
+    F16IMAGE2DRECT = 502,
+    F16IMAGECUBE = 503,
+    F16IMAGE1DARRAY = 504,
+    F16IMAGE2DARRAY = 505,
+    F16IMAGECUBEARRAY = 506,
+    F16IMAGEBUFFER = 507,
+    F16IMAGE2DMS = 508,
+    F16IMAGE2DMSARRAY = 509,
+    TEXTURECUBEARRAY = 510,
+    ITEXTURECUBEARRAY = 511,
+    UTEXTURECUBEARRAY = 512,
+    TEXTURE1D = 513,
+    ITEXTURE1D = 514,
+    UTEXTURE1D = 515,
+    TEXTURE1DARRAY = 516,
+    ITEXTURE1DARRAY = 517,
+    UTEXTURE1DARRAY = 518,
+    TEXTURE2DRECT = 519,
+    ITEXTURE2DRECT = 520,
+    UTEXTURE2DRECT = 521,
+    TEXTUREBUFFER = 522,
+    ITEXTUREBUFFER = 523,
+    UTEXTUREBUFFER = 524,
+    TEXTURE2DMS = 525,
+    ITEXTURE2DMS = 526,
+    UTEXTURE2DMS = 527,
+    TEXTURE2DMSARRAY = 528,
+    ITEXTURE2DMSARRAY = 529,
+    UTEXTURE2DMSARRAY = 530,
+    F16TEXTURE1D = 531,
+    F16TEXTURE2D = 532,
+    F16TEXTURE3D = 533,
+    F16TEXTURE2DRECT = 534,
+    F16TEXTURECUBE = 535,
+    F16TEXTURE1DARRAY = 536,
+    F16TEXTURE2DARRAY = 537,
+    F16TEXTURECUBEARRAY = 538,
+    F16TEXTUREBUFFER = 539,
+    F16TEXTURE2DMS = 540,
+    F16TEXTURE2DMSARRAY = 541,
+    SUBPASSINPUT = 542,
+    SUBPASSINPUTMS = 543,
+    ISUBPASSINPUT = 544,
+    ISUBPASSINPUTMS = 545,
+    USUBPASSINPUT = 546,
+    USUBPASSINPUTMS = 547,
+    F16SUBPASSINPUT = 548,
+    F16SUBPASSINPUTMS = 549,
+    LEFT_OP = 550,
+    RIGHT_OP = 551,
+    INC_OP = 552,
+    DEC_OP = 553,
+    LE_OP = 554,
+    GE_OP = 555,
+    EQ_OP = 556,
+    NE_OP = 557,
+    AND_OP = 558,
+    OR_OP = 559,
+    XOR_OP = 560,
+    MUL_ASSIGN = 561,
+    DIV_ASSIGN = 562,
+    ADD_ASSIGN = 563,
+    MOD_ASSIGN = 564,
+    LEFT_ASSIGN = 565,
+    RIGHT_ASSIGN = 566,
+    AND_ASSIGN = 567,
+    XOR_ASSIGN = 568,
+    OR_ASSIGN = 569,
+    SUB_ASSIGN = 570,
+    STRING_LITERAL = 571,
+    LEFT_PAREN = 572,
+    RIGHT_PAREN = 573,
+    LEFT_BRACKET = 574,
+    RIGHT_BRACKET = 575,
+    LEFT_BRACE = 576,
+    RIGHT_BRACE = 577,
+    DOT = 578,
+    COMMA = 579,
+    COLON = 580,
+    EQUAL = 581,
+    SEMICOLON = 582,
+    BANG = 583,
+    DASH = 584,
+    TILDE = 585,
+    PLUS = 586,
+    STAR = 587,
+    SLASH = 588,
+    PERCENT = 589,
+    LEFT_ANGLE = 590,
+    RIGHT_ANGLE = 591,
+    VERTICAL_BAR = 592,
+    CARET = 593,
+    AMPERSAND = 594,
+    QUESTION = 595,
+    INVARIANT = 596,
+    HIGH_PRECISION = 597,
+    MEDIUM_PRECISION = 598,
+    LOW_PRECISION = 599,
+    PRECISION = 600,
+    PACKED = 601,
+    RESOURCE = 602,
+    SUPERP = 603,
+    FLOATCONSTANT = 604,
+    INTCONSTANT = 605,
+    UINTCONSTANT = 606,
+    BOOLCONSTANT = 607,
+    IDENTIFIER = 608,
+    TYPE_NAME = 609,
+    CENTROID = 610,
+    IN = 611,
+    OUT = 612,
+    INOUT = 613,
+    STRUCT = 614,
+    VOID = 615,
+    WHILE = 616,
+    BREAK = 617,
+    CONTINUE = 618,
+    DO = 619,
+    ELSE = 620,
+    FOR = 621,
+    IF = 622,
+    DISCARD = 623,
+    RETURN = 624,
+    SWITCH = 625,
+    CASE = 626,
+    DEFAULT = 627,
+    UNIFORM = 628,
+    SHARED = 629,
+    BUFFER = 630,
+    FLAT = 631,
+    SMOOTH = 632,
+    LAYOUT = 633,
+    DOUBLECONSTANT = 634,
+    INT16CONSTANT = 635,
+    UINT16CONSTANT = 636,
+    FLOAT16CONSTANT = 637,
+    INT32CONSTANT = 638,
+    UINT32CONSTANT = 639,
+    INT64CONSTANT = 640,
+    UINT64CONSTANT = 641,
+    SUBROUTINE = 642,
+    DEMOTE = 643,
+    PAYLOADNV = 644,
+    PAYLOADINNV = 645,
+    HITATTRNV = 646,
+    CALLDATANV = 647,
+    CALLDATAINNV = 648,
+    PAYLOADEXT = 649,
+    PAYLOADINEXT = 650,
+    HITATTREXT = 651,
+    CALLDATAEXT = 652,
+    CALLDATAINEXT = 653,
+    PATCH = 654,
+    SAMPLE = 655,
+    NONUNIFORM = 656,
+    COHERENT = 657,
+    VOLATILE = 658,
+    RESTRICT = 659,
+    READONLY = 660,
+    WRITEONLY = 661,
+    DEVICECOHERENT = 662,
+    QUEUEFAMILYCOHERENT = 663,
+    WORKGROUPCOHERENT = 664,
+    SUBGROUPCOHERENT = 665,
+    NONPRIVATE = 666,
+    SHADERCALLCOHERENT = 667,
+    NOPERSPECTIVE = 668,
+    EXPLICITINTERPAMD = 669,
+    PERVERTEXNV = 670,
+    PERPRIMITIVENV = 671,
+    PERVIEWNV = 672,
+    PERTASKNV = 673,
+    PRECISE = 674
+  };
+#endif
+
+/* Value type.  */
+#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
+
+union YYSTYPE
+{
+#line 97 "glslang.y" /* yacc.c:1909  */
+
+    struct {
+        glslang::TSourceLoc loc;
+        union {
+            glslang::TString *string;
+            int i;
+            unsigned int u;
+            long long i64;
+            unsigned long long u64;
+            bool b;
+            double d;
+        };
+        glslang::TSymbol* symbol;
+    } lex;
+    struct {
+        glslang::TSourceLoc loc;
+        glslang::TOperator op;
+        union {
+            TIntermNode* intermNode;
+            glslang::TIntermNodePair nodePair;
+            glslang::TIntermTyped* intermTypedNode;
+            glslang::TAttributes* attributes;
+        };
+        union {
+            glslang::TPublicType type;
+            glslang::TFunction* function;
+            glslang::TParameter param;
+            glslang::TTypeLoc typeLine;
+            glslang::TTypeList* typeList;
+            glslang::TArraySizes* arraySizes;
+            glslang::TIdentifierList* identifierList;
+        };
+        glslang::TArraySizes* typeParameters;
+    } interm;
+
+#line 510 "glslang_tab.cpp.h" /* yacc.c:1909  */
+};
+
+typedef union YYSTYPE YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1
+# define YYSTYPE_IS_DECLARED 1
+#endif
+
+
+
+int yyparse (glslang::TParseContext* pParseContext);
+
+#endif /* !YY_YY_GLSLANG_TAB_CPP_H_INCLUDED  */

dep/glslang/glslang/MachineIndependent/iomapper.h

@@ -0,0 +1,302 @@
+//
+// Copyright (C) 2016 LunarG, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+#ifndef GLSLANG_WEB
+
+#ifndef _IOMAPPER_INCLUDED
+#define _IOMAPPER_INCLUDED
+
+#include <cstdint>
+#include "LiveTraverser.h"
+#include <unordered_map>
+#include <unordered_set>
+//
+// A reflection database and its interface, consistent with the OpenGL API reflection queries.
+//
+
+class TInfoSink;
+
+namespace glslang {
+
+class TIntermediate;
+struct TVarEntryInfo {
+    int id;
+    TIntermSymbol* symbol;
+    bool live;
+    int newBinding;
+    int newSet;
+    int newLocation;
+    int newComponent;
+    int newIndex;
+    EShLanguage stage;
+    struct TOrderById {
+        inline bool operator()(const TVarEntryInfo& l, const TVarEntryInfo& r) { return l.id < r.id; }
+    };
+
+    struct TOrderByPriority {
+        // ordering:
+        // 1) has both binding and set
+        // 2) has binding but no set
+        // 3) has no binding but set
+        // 4) has no binding and no set
+        inline bool operator()(const TVarEntryInfo& l, const TVarEntryInfo& r) {
+            const TQualifier& lq = l.symbol->getQualifier();
+            const TQualifier& rq = r.symbol->getQualifier();
+
+            // simple rules:
+            // has binding gives 2 points
+            // has set gives 1 point
+            // who has the most points is more important.
+            int lPoints = (lq.hasBinding() ? 2 : 0) + (lq.hasSet() ? 1 : 0);
+            int rPoints = (rq.hasBinding() ? 2 : 0) + (rq.hasSet() ? 1 : 0);
+
+            if (lPoints == rPoints)
+                return l.id < r.id;
+            return lPoints > rPoints;
+        }
+    };
+};
+
+// Base class for shared TIoMapResolver services, used by several derivations.
+struct TDefaultIoResolverBase : public glslang::TIoMapResolver {
+public:
+    TDefaultIoResolverBase(const TIntermediate& intermediate);
+    typedef std::vector<int> TSlotSet;
+    typedef std::unordered_map<int, TSlotSet> TSlotSetMap;
+
+    // grow the reflection stage by stage
+    void notifyBinding(EShLanguage, TVarEntryInfo& /*ent*/) override {}
+    void notifyInOut(EShLanguage, TVarEntryInfo& /*ent*/) override {}
+    void beginNotifications(EShLanguage) override {}
+    void endNotifications(EShLanguage) override {}
+    void beginResolve(EShLanguage) override {}
+    void endResolve(EShLanguage) override {}
+    void beginCollect(EShLanguage) override {}
+    void endCollect(EShLanguage) override {}
+    void reserverResourceSlot(TVarEntryInfo& /*ent*/, TInfoSink& /*infoSink*/) override {}
+    void reserverStorageSlot(TVarEntryInfo& /*ent*/, TInfoSink& /*infoSink*/) override {}
+    int getBaseBinding(TResourceType res, unsigned int set) const;
+    const std::vector<std::string>& getResourceSetBinding() const;
+    virtual TResourceType getResourceType(const glslang::TType& type) = 0;
+    bool doAutoBindingMapping() const;
+    bool doAutoLocationMapping() const;
+    TSlotSet::iterator findSlot(int set, int slot);
+    bool checkEmpty(int set, int slot);
+    bool validateInOut(EShLanguage /*stage*/, TVarEntryInfo& /*ent*/) override { return true; }
+    int reserveSlot(int set, int slot, int size = 1);
+    int getFreeSlot(int set, int base, int size = 1);
+    int resolveSet(EShLanguage /*stage*/, TVarEntryInfo& ent) override;
+    int resolveUniformLocation(EShLanguage /*stage*/, TVarEntryInfo& ent) override;
+    int resolveInOutLocation(EShLanguage stage, TVarEntryInfo& ent) override;
+    int resolveInOutComponent(EShLanguage /*stage*/, TVarEntryInfo& ent) override;
+    int resolveInOutIndex(EShLanguage /*stage*/, TVarEntryInfo& ent) override;
+    void addStage(EShLanguage stage) override {
+        if (stage < EShLangCount)
+            stageMask[stage] = true;
+    }
+    uint32_t computeTypeLocationSize(const TType& type, EShLanguage stage);
+
+    TSlotSetMap slots;
+    bool hasError = false;
+
+protected:
+    TDefaultIoResolverBase(TDefaultIoResolverBase&);
+    TDefaultIoResolverBase& operator=(TDefaultIoResolverBase&);
+    const TIntermediate& intermediate;
+    int nextUniformLocation;
+    int nextInputLocation;
+    int nextOutputLocation;
+    bool stageMask[EShLangCount + 1];
+    // Return descriptor set specific base if there is one, and the generic base otherwise.
+    int selectBaseBinding(int base, int descriptorSetBase) const {
+        return descriptorSetBase != -1 ? descriptorSetBase : base;
+    }
+
+    static int getLayoutSet(const glslang::TType& type) {
+        if (type.getQualifier().hasSet())
+            return type.getQualifier().layoutSet;
+        else
+            return 0;
+    }
+
+    static bool isSamplerType(const glslang::TType& type) {
+        return type.getBasicType() == glslang::EbtSampler && type.getSampler().isPureSampler();
+    }
+
+    static bool isTextureType(const glslang::TType& type) {
+        return (type.getBasicType() == glslang::EbtSampler &&
+                (type.getSampler().isTexture() || type.getSampler().isSubpass()));
+    }
+
+    static bool isUboType(const glslang::TType& type) {
+        return type.getQualifier().storage == EvqUniform;
+    }
+
+    static bool isImageType(const glslang::TType& type) {
+        return type.getBasicType() == glslang::EbtSampler && type.getSampler().isImage();
+    }
+
+    static bool isSsboType(const glslang::TType& type) {
+        return type.getQualifier().storage == EvqBuffer;
+    }
+
+    // Return true if this is a SRV (shader resource view) type:
+    static bool isSrvType(const glslang::TType& type) {
+        return isTextureType(type) || type.getQualifier().storage == EvqBuffer;
+    }
+
+    // Return true if this is a UAV (unordered access view) type:
+    static bool isUavType(const glslang::TType& type) {
+        if (type.getQualifier().isReadOnly())
+            return false;
+        return (type.getBasicType() == glslang::EbtSampler && type.getSampler().isImage()) ||
+                (type.getQualifier().storage == EvqBuffer);
+    }
+};
+
+// Defaulf I/O resolver for OpenGL
+struct TDefaultGlslIoResolver : public TDefaultIoResolverBase {
+public:
+    typedef std::map<TString, int> TVarSlotMap;  // <resourceName, location/binding>
+    typedef std::map<int, TVarSlotMap> TSlotMap; // <resourceKey, TVarSlotMap>
+    TDefaultGlslIoResolver(const TIntermediate& intermediate);
+    bool validateBinding(EShLanguage /*stage*/, TVarEntryInfo& /*ent*/) override { return true; }
+    TResourceType getResourceType(const glslang::TType& type) override;
+    int resolveInOutLocation(EShLanguage stage, TVarEntryInfo& ent) override;
+    int resolveUniformLocation(EShLanguage /*stage*/, TVarEntryInfo& ent) override;
+    int resolveBinding(EShLanguage /*stage*/, TVarEntryInfo& ent) override;
+    void beginResolve(EShLanguage /*stage*/) override;
+    void endResolve(EShLanguage stage) override;
+    void beginCollect(EShLanguage) override;
+    void endCollect(EShLanguage) override;
+    void reserverStorageSlot(TVarEntryInfo& ent, TInfoSink& infoSink) override;
+    void reserverResourceSlot(TVarEntryInfo& ent, TInfoSink& infoSink) override;
+    const TString& getAccessName(const TIntermSymbol*);
+    // in/out symbol and uniform symbol are stored in the same resourceSlotMap, the storage key is used to identify each type of symbol.
+    // We use stage and storage qualifier to construct a storage key. it can help us identify the same storage resource used in different stage.
+    // if a resource is a program resource and we don't need know it usage stage, we can use same stage to build storage key.
+    // Note: both stage and type must less then 0xffff.
+    int buildStorageKey(EShLanguage stage, TStorageQualifier type) {
+        assert(static_cast<uint32_t>(stage) <= 0x0000ffff && static_cast<uint32_t>(type) <= 0x0000ffff);
+        return (stage << 16) | type;
+    }
+
+protected:
+    // Use for mark pre stage, to get more interface symbol information.
+    EShLanguage preStage;
+    // Use for mark current shader stage for resolver
+    EShLanguage currentStage;
+    // Slot map for storage resource(location of uniform and interface symbol) It's a program share slot
+    TSlotMap resourceSlotMap;
+    // Slot map for other resource(image, ubo, ssbo), It's a program share slot.
+    TSlotMap storageSlotMap;
+};
+
+typedef std::map<TString, TVarEntryInfo> TVarLiveMap;
+
+// override function "operator=", if a vector<const _Kty, _Ty> being sort,
+// when use vc++, the sort function will call :
+// pair& operator=(const pair<_Other1, _Other2>& _Right)
+// {
+//     first = _Right.first;
+//     second = _Right.second;
+//     return (*this);
+// }
+// that will make a const type handing on left.
+// override this function can avoid a compiler error.
+// In the future, if the vc++ compiler can handle such a situation,
+// this part of the code will be removed.
+struct TVarLivePair : std::pair<const TString, TVarEntryInfo> {
+    TVarLivePair(const std::pair<const TString, TVarEntryInfo>& _Right) : pair(_Right.first, _Right.second) {}
+    TVarLivePair& operator=(const TVarLivePair& _Right) {
+        const_cast<TString&>(first) = _Right.first;
+        second = _Right.second;
+        return (*this);
+    }
+    TVarLivePair(const TVarLivePair& src) : pair(src) { }
+};
+typedef std::vector<TVarLivePair> TVarLiveVector;
+
+// I/O mapper
+class TIoMapper {
+public:
+    TIoMapper() {}
+    virtual ~TIoMapper() {}
+    // grow the reflection stage by stage
+    bool virtual addStage(EShLanguage, TIntermediate&, TInfoSink&, TIoMapResolver*);
+    bool virtual doMap(TIoMapResolver*, TInfoSink&) { return true; }
+};
+
+// I/O mapper for OpenGL
+class TGlslIoMapper : public TIoMapper {
+public:
+    TGlslIoMapper() {
+        memset(inVarMaps,     0, sizeof(TVarLiveMap*)   * EShLangCount);
+        memset(outVarMaps,    0, sizeof(TVarLiveMap*)   * EShLangCount);
+        memset(uniformVarMap, 0, sizeof(TVarLiveMap*)   * EShLangCount);
+        memset(intermediates, 0, sizeof(TIntermediate*) * EShLangCount);
+    }
+    virtual ~TGlslIoMapper() {
+        for (size_t stage = 0; stage < EShLangCount; stage++) {
+            if (inVarMaps[stage] != nullptr) {
+                delete inVarMaps[stage];
+                inVarMaps[stage] = nullptr;
+            }
+            if (outVarMaps[stage] != nullptr) {
+                delete outVarMaps[stage];
+                outVarMaps[stage] = nullptr;
+            }
+            if (uniformVarMap[stage] != nullptr) {
+                delete uniformVarMap[stage];
+                uniformVarMap[stage] = nullptr;
+            }
+            if (intermediates[stage] != nullptr)
+                intermediates[stage] = nullptr;
+        }
+    }
+    // grow the reflection stage by stage
+    bool addStage(EShLanguage, TIntermediate&, TInfoSink&, TIoMapResolver*) override;
+    bool doMap(TIoMapResolver*, TInfoSink&) override;
+    TVarLiveMap *inVarMaps[EShLangCount], *outVarMaps[EShLangCount],
+                *uniformVarMap[EShLangCount];
+    TIntermediate* intermediates[EShLangCount];
+    bool hadError = false;
+};
+
+} // end namespace glslang
+
+#endif // _IOMAPPER_INCLUDED
+
+#endif //  GLSLANG_WEB

dep/glslang/glslang/MachineIndependent/limits.cpp

@@ -0,0 +1,200 @@
+//
+// Copyright (C) 2013 LunarG, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+//
+// Do sub tree walks for
+// 1) inductive loop bodies to see if the inductive variable is modified
+// 2) array-index expressions to see if they are "constant-index-expression"
+//
+// These are per Appendix A of ES 2.0:
+//
+// "Within the body of the loop, the loop index is not statically assigned to nor is it used as the
+// argument to a function out or inout parameter."
+//
+// "The following are constant-index-expressions:
+//  - Constant expressions
+//  - Loop indices as defined in section 4
+//  - Expressions composed of both of the above"
+//
+// N.B.: assuming the last rule excludes function calls
+//
+
+#include "ParseHelper.h"
+
+namespace glslang {
+
+//
+// The inductive loop-body traverser.
+//
+// Just look at things that might modify the loop index.
+//
+
+class TInductiveTraverser : public TIntermTraverser {
+public:
+    TInductiveTraverser(int id, TSymbolTable& st)
+    : loopId(id), symbolTable(st), bad(false)  { }
+
+    virtual bool visitBinary(TVisit, TIntermBinary* node);
+    virtual bool visitUnary(TVisit, TIntermUnary* node);
+    virtual bool visitAggregate(TVisit, TIntermAggregate* node);
+
+    int loopId;           // unique ID of the symbol that's the loop inductive variable
+    TSymbolTable& symbolTable;
+    bool bad;
+    TSourceLoc badLoc;
+
+protected:
+    TInductiveTraverser(TInductiveTraverser&);
+    TInductiveTraverser& operator=(TInductiveTraverser&);
+};
+
+// check binary operations for those modifying the loop index
+bool TInductiveTraverser::visitBinary(TVisit /* visit */, TIntermBinary* node)
+{
+    if (node->modifiesState() && node->getLeft()->getAsSymbolNode() &&
+                                 node->getLeft()->getAsSymbolNode()->getId() == loopId) {
+        bad = true;
+        badLoc = node->getLoc();
+    }
+
+    return true;
+}
+
+// check unary operations for those modifying the loop index
+bool TInductiveTraverser::visitUnary(TVisit /* visit */, TIntermUnary* node)
+{
+    if (node->modifiesState() && node->getOperand()->getAsSymbolNode() &&
+                                 node->getOperand()->getAsSymbolNode()->getId() == loopId) {
+        bad = true;
+        badLoc = node->getLoc();
+    }
+
+    return true;
+}
+
+// check function calls for arguments modifying the loop index
+bool TInductiveTraverser::visitAggregate(TVisit /* visit */, TIntermAggregate* node)
+{
+    if (node->getOp() == EOpFunctionCall) {
+        // see if an out or inout argument is the loop index
+        const TIntermSequence& args = node->getSequence();
+        for (int i = 0; i < (int)args.size(); ++i) {
+            if (args[i]->getAsSymbolNode() && args[i]->getAsSymbolNode()->getId() == loopId) {
+                TSymbol* function = symbolTable.find(node->getName());
+                const TType* type = (*function->getAsFunction())[i].type;
+                if (type->getQualifier().storage == EvqOut ||
+                    type->getQualifier().storage == EvqInOut) {
+                    bad = true;
+                    badLoc = node->getLoc();
+                }
+            }
+        }
+    }
+
+    return true;
+}
+
+//
+// External function to call for loop check.
+//
+void TParseContext::inductiveLoopBodyCheck(TIntermNode* body, int loopId, TSymbolTable& symbolTable)
+{
+    TInductiveTraverser it(loopId, symbolTable);
+
+    if (body == nullptr)
+        return;
+
+    body->traverse(&it);
+
+    if (it.bad)
+        error(it.badLoc, "inductive loop index modified", "limitations", "");
+}
+
+//
+// The "constant-index-expression" tranverser.
+//
+// Just look at things that can form an index.
+//
+
+class TIndexTraverser : public TIntermTraverser {
+public:
+    TIndexTraverser(const TIdSetType& ids) : inductiveLoopIds(ids), bad(false) { }
+    virtual void visitSymbol(TIntermSymbol* symbol);
+    virtual bool visitAggregate(TVisit, TIntermAggregate* node);
+    const TIdSetType& inductiveLoopIds;
+    bool bad;
+    TSourceLoc badLoc;
+
+protected:
+    TIndexTraverser(TIndexTraverser&);
+    TIndexTraverser& operator=(TIndexTraverser&);
+};
+
+// make sure symbols are inductive-loop indexes
+void TIndexTraverser::visitSymbol(TIntermSymbol* symbol)
+{
+    if (inductiveLoopIds.find(symbol->getId()) == inductiveLoopIds.end()) {
+        bad = true;
+        badLoc = symbol->getLoc();
+    }
+}
+
+// check for function calls, assuming they are bad; spec. doesn't really say
+bool TIndexTraverser::visitAggregate(TVisit /* visit */, TIntermAggregate* node)
+{
+    if (node->getOp() == EOpFunctionCall) {
+        bad = true;
+        badLoc = node->getLoc();
+    }
+
+    return true;
+}
+
+//
+// External function to call for loop check.
+//
+void TParseContext::constantIndexExpressionCheck(TIntermNode* index)
+{
+#ifndef GLSLANG_WEB
+    TIndexTraverser it(inductiveLoopIds);
+
+    index->traverse(&it);
+
+    if (it.bad)
+        error(it.badLoc, "Non-constant-index-expression", "limitations", "");
+#endif
+}
+
+} // end namespace glslang

dep/glslang/glslang/MachineIndependent/parseConst.cpp

@@ -0,0 +1,214 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+//
+// Traverse a tree of constants to create a single folded constant.
+// It should only be used when the whole tree is known to be constant.
+//
+
+#include "ParseHelper.h"
+
+namespace glslang {
+
+class TConstTraverser : public TIntermTraverser {
+public:
+    TConstTraverser(const TConstUnionArray& cUnion, bool singleConstParam, TOperator constructType, const TType& t)
+      : unionArray(cUnion), type(t),
+        constructorType(constructType), singleConstantParam(singleConstParam), error(false), isMatrix(false),
+        matrixCols(0), matrixRows(0) {  index = 0; tOp = EOpNull; }
+
+    virtual void visitConstantUnion(TIntermConstantUnion* node);
+    virtual bool visitAggregate(TVisit, TIntermAggregate* node);
+
+    int index;
+    TConstUnionArray unionArray;
+    TOperator tOp;
+    const TType& type;
+    TOperator constructorType;
+    bool singleConstantParam;
+    bool error;
+    int size; // size of the constructor ( 4 for vec4)
+    bool isMatrix;
+    int matrixCols;
+    int matrixRows;
+
+protected:
+    TConstTraverser(TConstTraverser&);
+    TConstTraverser& operator=(TConstTraverser&);
+};
+
+bool TConstTraverser::visitAggregate(TVisit /* visit */, TIntermAggregate* node)
+{
+    if (! node->isConstructor() && node->getOp() != EOpComma) {
+        error = true;
+
+        return false;
+    }
+
+    bool flag = node->getSequence().size() == 1 && node->getSequence()[0]->getAsTyped()->getAsConstantUnion();
+    if (flag) {
+        singleConstantParam = true;
+        constructorType = node->getOp();
+        size = node->getType().computeNumComponents();
+
+        if (node->getType().isMatrix()) {
+            isMatrix = true;
+            matrixCols = node->getType().getMatrixCols();
+            matrixRows = node->getType().getMatrixRows();
+        }
+    }
+
+    for (TIntermSequence::iterator p = node->getSequence().begin();
+                                   p != node->getSequence().end(); p++) {
+
+        if (node->getOp() == EOpComma)
+            index = 0;
+
+        (*p)->traverse(this);
+    }
+    if (flag)
+    {
+        singleConstantParam = false;
+        constructorType = EOpNull;
+        size = 0;
+        isMatrix = false;
+        matrixCols = 0;
+        matrixRows = 0;
+    }
+
+    return false;
+}
+
+void TConstTraverser::visitConstantUnion(TIntermConstantUnion* node)
+{
+    TConstUnionArray leftUnionArray(unionArray);
+    int instanceSize = type.computeNumComponents();
+
+    if (index >= instanceSize)
+        return;
+
+    if (! singleConstantParam) {
+        int rightUnionSize = node->getType().computeNumComponents();
+
+        const TConstUnionArray& rightUnionArray = node->getConstArray();
+        for (int i = 0; i < rightUnionSize; i++) {
+            if (index >= instanceSize)
+                return;
+            leftUnionArray[index] = rightUnionArray[i];
+
+            index++;
+        }
+    } else {
+        int endIndex = index + size;
+        const TConstUnionArray& rightUnionArray = node->getConstArray();
+        if (! isMatrix) {
+            int count = 0;
+            int nodeComps = node->getType().computeNumComponents();
+            for (int i = index; i < endIndex; i++) {
+                if (i >= instanceSize)
+                    return;
+
+                leftUnionArray[i] = rightUnionArray[count];
+
+                (index)++;
+
+                if (nodeComps > 1)
+                    count++;
+            }
+        } else {
+            // constructing a matrix, but from what?
+            if (node->isMatrix()) {
+                // Matrix from a matrix; this has the outer matrix, node is the argument matrix.
+                // Traverse the outer, potentially bigger matrix, fill in missing pieces with the
+                // identity matrix.
+                for (int c = 0; c < matrixCols; ++c) {
+                    for (int r = 0; r < matrixRows; ++r) {
+                        int targetOffset = index + c * matrixRows + r;
+                        if (r < node->getType().getMatrixRows() && c < node->getType().getMatrixCols()) {
+                            int srcOffset = c * node->getType().getMatrixRows() + r;
+                            leftUnionArray[targetOffset] = rightUnionArray[srcOffset];
+                        } else if (r == c)
+                            leftUnionArray[targetOffset].setDConst(1.0);
+                        else
+                            leftUnionArray[targetOffset].setDConst(0.0);
+                    }
+                }
+            } else {
+                // matrix from vector or scalar
+                int count = 0;
+                const int startIndex = index;
+                int nodeComps = node->getType().computeNumComponents();
+                for (int i = startIndex; i < endIndex; i++) {
+                    if (i >= instanceSize)
+                        return;
+                    if (nodeComps == 1) {
+                        // If there is a single scalar parameter to a matrix
+                        // constructor, it is used to initialize all the
+                        // components on the matrix's diagonal, with the
+                        // remaining components initialized to 0.0.
+                        if (i == startIndex || (i - startIndex) % (matrixRows + 1) == 0 )
+                            leftUnionArray[i] = rightUnionArray[count];
+                        else
+                            leftUnionArray[i].setDConst(0.0);
+                    } else {
+                        // construct the matrix in column-major order, from
+                        // the components provided, in order
+                        leftUnionArray[i] = rightUnionArray[count];
+                    }
+
+                    index++;
+
+                    if (nodeComps > 1)
+                        count++;
+                }
+            }
+        }
+    }
+}
+
+bool TIntermediate::parseConstTree(TIntermNode* root, TConstUnionArray unionArray, TOperator constructorType, const TType& t, bool singleConstantParam)
+{
+    if (root == 0)
+        return false;
+
+    TConstTraverser it(unionArray, singleConstantParam, constructorType, t);
+
+    root->traverse(&it);
+    if (it.error)
+        return true;
+    else
+        return false;
+}
+
+} // end namespace glslang

dep/glslang/glslang/MachineIndependent/parseVersions.h

@@ -0,0 +1,236 @@
+//
+// Copyright (C) 2015-2018 Google, Inc.
+// Copyright (C) 2017 ARM Limited.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+// This is implemented in Versions.cpp
+
+#ifndef _PARSE_VERSIONS_INCLUDED_
+#define _PARSE_VERSIONS_INCLUDED_
+
+#include "../Public/ShaderLang.h"
+#include "../Include/InfoSink.h"
+#include "Scan.h"
+
+#include <map>
+
+namespace glslang {
+
+//
+// Base class for parse helpers.
+// This just has version-related information and checking.
+// This class should be sufficient for preprocessing.
+//
+class TParseVersions {
+public:
+    TParseVersions(TIntermediate& interm, int version, EProfile profile,
+                   const SpvVersion& spvVersion, EShLanguage language, TInfoSink& infoSink,
+                   bool forwardCompatible, EShMessages messages)
+        :
+#ifndef GLSLANG_WEB
+        forwardCompatible(forwardCompatible),
+        profile(profile),
+#endif
+        infoSink(infoSink), version(version), 
+        language(language),
+        spvVersion(spvVersion), 
+        intermediate(interm), messages(messages), numErrors(0), currentScanner(0) { }
+    virtual ~TParseVersions() { }
+    void requireStage(const TSourceLoc&, EShLanguageMask, const char* featureDesc);
+    void requireStage(const TSourceLoc&, EShLanguage, const char* featureDesc);
+#ifdef GLSLANG_WEB
+    const EProfile profile = EEsProfile;
+    bool isEsProfile() const { return true; }
+    void requireProfile(const TSourceLoc& loc, int profileMask, const char* featureDesc)
+    {
+        if (! (EEsProfile & profileMask))
+            error(loc, "not supported with this profile:", featureDesc, ProfileName(profile));
+    }
+    void profileRequires(const TSourceLoc& loc, int profileMask, int minVersion, int numExtensions,
+        const char* const extensions[], const char* featureDesc)
+    {
+        if ((EEsProfile & profileMask) && (minVersion == 0 || version < minVersion))
+            error(loc, "not supported for this version or the enabled extensions", featureDesc, "");
+    }
+    void profileRequires(const TSourceLoc& loc, int profileMask, int minVersion, const char* extension,
+        const char* featureDesc)
+    {
+        profileRequires(loc, profileMask, minVersion, extension ? 1 : 0, &extension, featureDesc);
+    }
+    void initializeExtensionBehavior() { }
+    void checkDeprecated(const TSourceLoc&, int queryProfiles, int depVersion, const char* featureDesc) { }
+    void requireNotRemoved(const TSourceLoc&, int queryProfiles, int removedVersion, const char* featureDesc) { }
+    void requireExtensions(const TSourceLoc&, int numExtensions, const char* const extensions[],
+        const char* featureDesc) { }
+    void ppRequireExtensions(const TSourceLoc&, int numExtensions, const char* const extensions[],
+        const char* featureDesc) { }
+    TExtensionBehavior getExtensionBehavior(const char*) { return EBhMissing; }
+    bool extensionTurnedOn(const char* const extension) { return false; }
+    bool extensionsTurnedOn(int numExtensions, const char* const extensions[]) { return false; }
+    void updateExtensionBehavior(int line, const char* const extension, const char* behavior) { }
+    void updateExtensionBehavior(const char* const extension, TExtensionBehavior) { }
+    void checkExtensionStage(const TSourceLoc&, const char* const extension) { }
+    void fullIntegerCheck(const TSourceLoc&, const char* op) { }
+    void doubleCheck(const TSourceLoc&, const char* op) { }
+    bool float16Arithmetic() { return false; }
+    void requireFloat16Arithmetic(const TSourceLoc& loc, const char* op, const char* featureDesc) { }
+    bool int16Arithmetic() { return false; }
+    void requireInt16Arithmetic(const TSourceLoc& loc, const char* op, const char* featureDesc) { }
+    bool int8Arithmetic() { return false; }
+    void requireInt8Arithmetic(const TSourceLoc& loc, const char* op, const char* featureDesc) { }
+    void int64Check(const TSourceLoc&, const char* op, bool builtIn = false) { }
+    void explicitFloat32Check(const TSourceLoc&, const char* op, bool builtIn = false) { }
+    void explicitFloat64Check(const TSourceLoc&, const char* op, bool builtIn = false) { }
+    bool relaxedErrors()    const { return false; }
+    bool suppressWarnings() const { return true; }
+    bool isForwardCompatible() const { return false; }
+#else
+    bool forwardCompatible;      // true if errors are to be given for use of deprecated features
+    EProfile profile;            // the declared profile in the shader (core by default)
+    bool isEsProfile() const { return profile == EEsProfile; }
+    void requireProfile(const TSourceLoc& loc, int profileMask, const char* featureDesc);
+    void profileRequires(const TSourceLoc& loc, int profileMask, int minVersion, int numExtensions,
+        const char* const extensions[], const char* featureDesc);
+    void profileRequires(const TSourceLoc& loc, int profileMask, int minVersion, const char* extension,
+        const char* featureDesc);
+    virtual void initializeExtensionBehavior();
+    virtual void checkDeprecated(const TSourceLoc&, int queryProfiles, int depVersion, const char* featureDesc);
+    virtual void requireNotRemoved(const TSourceLoc&, int queryProfiles, int removedVersion, const char* featureDesc);
+    virtual void requireExtensions(const TSourceLoc&, int numExtensions, const char* const extensions[],
+        const char* featureDesc);
+    virtual void ppRequireExtensions(const TSourceLoc&, int numExtensions, const char* const extensions[],
+        const char* featureDesc);
+    virtual TExtensionBehavior getExtensionBehavior(const char*);
+    virtual bool extensionTurnedOn(const char* const extension);
+    virtual bool extensionsTurnedOn(int numExtensions, const char* const extensions[]);
+    virtual void updateExtensionBehavior(int line, const char* const extension, const char* behavior);
+    virtual void updateExtensionBehavior(const char* const extension, TExtensionBehavior);
+    virtual bool checkExtensionsRequested(const TSourceLoc&, int numExtensions, const char* const extensions[],
+        const char* featureDesc);
+    virtual void checkExtensionStage(const TSourceLoc&, const char* const extension);
+    virtual void fullIntegerCheck(const TSourceLoc&, const char* op);
+
+    virtual void unimplemented(const TSourceLoc&, const char* featureDesc);
+    virtual void doubleCheck(const TSourceLoc&, const char* op);
+    virtual void float16Check(const TSourceLoc&, const char* op, bool builtIn = false);
+    virtual void float16ScalarVectorCheck(const TSourceLoc&, const char* op, bool builtIn = false);
+    virtual bool float16Arithmetic();
+    virtual void requireFloat16Arithmetic(const TSourceLoc& loc, const char* op, const char* featureDesc);
+    virtual void int16ScalarVectorCheck(const TSourceLoc&, const char* op, bool builtIn = false);
+    virtual bool int16Arithmetic();
+    virtual void requireInt16Arithmetic(const TSourceLoc& loc, const char* op, const char* featureDesc);
+    virtual void int8ScalarVectorCheck(const TSourceLoc&, const char* op, bool builtIn = false);
+    virtual bool int8Arithmetic();
+    virtual void requireInt8Arithmetic(const TSourceLoc& loc, const char* op, const char* featureDesc);
+    virtual void float16OpaqueCheck(const TSourceLoc&, const char* op, bool builtIn = false);
+    virtual void int64Check(const TSourceLoc&, const char* op, bool builtIn = false);
+    virtual void explicitInt8Check(const TSourceLoc&, const char* op, bool builtIn = false);
+    virtual void explicitInt16Check(const TSourceLoc&, const char* op, bool builtIn = false);
+    virtual void explicitInt32Check(const TSourceLoc&, const char* op, bool builtIn = false);
+    virtual void explicitFloat32Check(const TSourceLoc&, const char* op, bool builtIn = false);
+    virtual void explicitFloat64Check(const TSourceLoc&, const char* op, bool builtIn = false);
+    virtual void fcoopmatCheck(const TSourceLoc&, const char* op, bool builtIn = false);
+    virtual void intcoopmatCheck(const TSourceLoc&, const char *op, bool builtIn = false);
+    bool relaxedErrors()    const { return (messages & EShMsgRelaxedErrors) != 0; }
+    bool suppressWarnings() const { return (messages & EShMsgSuppressWarnings) != 0; }
+    bool isForwardCompatible() const { return forwardCompatible; }
+#endif // GLSLANG_WEB
+    virtual void spvRemoved(const TSourceLoc&, const char* op);
+    virtual void vulkanRemoved(const TSourceLoc&, const char* op);
+    virtual void requireVulkan(const TSourceLoc&, const char* op);
+    virtual void requireSpv(const TSourceLoc&, const char* op);
+
+
+#if defined(GLSLANG_WEB) && !defined(GLSLANG_WEB_DEVEL)
+    void C_DECL   error(const TSourceLoc&, const char* szReason, const char* szToken,
+                        const char* szExtraInfoFormat, ...) { addError(); }
+    void C_DECL    warn(const TSourceLoc&, const char* szReason, const char* szToken,
+                        const char* szExtraInfoFormat, ...) { }
+    void C_DECL ppError(const TSourceLoc&, const char* szReason, const char* szToken,
+                        const char* szExtraInfoFormat, ...) { addError(); }
+    void C_DECL  ppWarn(const TSourceLoc&, const char* szReason, const char* szToken,
+                        const char* szExtraInfoFormat, ...) { }
+#else
+    virtual void C_DECL error(const TSourceLoc&, const char* szReason, const char* szToken,
+        const char* szExtraInfoFormat, ...) = 0;
+    virtual void C_DECL  warn(const TSourceLoc&, const char* szReason, const char* szToken,
+        const char* szExtraInfoFormat, ...) = 0;
+    virtual void C_DECL ppError(const TSourceLoc&, const char* szReason, const char* szToken,
+        const char* szExtraInfoFormat, ...) = 0;
+    virtual void C_DECL ppWarn(const TSourceLoc&, const char* szReason, const char* szToken,
+        const char* szExtraInfoFormat, ...) = 0;
+#endif
+
+    void addError() { ++numErrors; }
+    int getNumErrors() const { return numErrors; }
+
+    void setScanner(TInputScanner* scanner) { currentScanner = scanner; }
+    TInputScanner* getScanner() const { return currentScanner; }
+    const TSourceLoc& getCurrentLoc() const { return currentScanner->getSourceLoc(); }
+    void setCurrentLine(int line) { currentScanner->setLine(line); }
+    void setCurrentColumn(int col) { currentScanner->setColumn(col); }
+    void setCurrentSourceName(const char* name) { currentScanner->setFile(name); }
+    void setCurrentString(int string) { currentScanner->setString(string); }
+
+    void getPreamble(std::string&);
+#ifdef ENABLE_HLSL
+    bool isReadingHLSL()    const { return (messages & EShMsgReadHlsl) == EShMsgReadHlsl; }
+    bool hlslEnable16BitTypes() const { return (messages & EShMsgHlslEnable16BitTypes) != 0; }
+    bool hlslDX9Compatible() const { return (messages & EShMsgHlslDX9Compatible) != 0; }
+#else
+    bool isReadingHLSL()    const { return false; }
+#endif
+
+    TInfoSink& infoSink;
+
+    // compilation mode
+    int version;                 // version, updated by #version in the shader
+    EShLanguage language;        // really the stage
+    SpvVersion spvVersion;
+    TIntermediate& intermediate; // helper for making and hooking up pieces of the parse tree
+
+protected:
+    TMap<TString, TExtensionBehavior> extensionBehavior;    // for each extension string, what its current behavior is set to
+    EShMessages messages;        // errors/warnings/rule-sets
+    int numErrors;               // number of compile-time errors encountered
+    TInputScanner* currentScanner;
+
+private:
+    explicit TParseVersions(const TParseVersions&);
+    TParseVersions& operator=(const TParseVersions&);
+};
+
+} // end namespace glslang
+
+#endif // _PARSE_VERSIONS_INCLUDED_

dep/glslang/glslang/MachineIndependent/preprocessor/PpAtom.cpp

@@ -0,0 +1,181 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// Copyright (C) 2013 LunarG, Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+/****************************************************************************\
+Copyright (c) 2002, NVIDIA Corporation.
+
+NVIDIA Corporation("NVIDIA") supplies this software to you in
+consideration of your agreement to the following terms, and your use,
+installation, modification or redistribution of this NVIDIA software
+constitutes acceptance of these terms.  If you do not agree with these
+terms, please do not use, install, modify or redistribute this NVIDIA
+software.
+
+In consideration of your agreement to abide by the following terms, and
+subject to these terms, NVIDIA grants you a personal, non-exclusive
+license, under NVIDIA's copyrights in this original NVIDIA software (the
+"NVIDIA Software"), to use, reproduce, modify and redistribute the
+NVIDIA Software, with or without modifications, in source and/or binary
+forms; provided that if you redistribute the NVIDIA Software, you must
+retain the copyright notice of NVIDIA, this notice and the following
+text and disclaimers in all such redistributions of the NVIDIA Software.
+Neither the name, trademarks, service marks nor logos of NVIDIA
+Corporation may be used to endorse or promote products derived from the
+NVIDIA Software without specific prior written permission from NVIDIA.
+Except as expressly stated in this notice, no other rights or licenses
+express or implied, are granted by NVIDIA herein, including but not
+limited to any patent rights that may be infringed by your derivative
+works or by other works in which the NVIDIA Software may be
+incorporated. No hardware is licensed hereunder.
+
+THE NVIDIA SOFTWARE IS BEING PROVIDED ON AN "AS IS" BASIS, WITHOUT
+WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED,
+INCLUDING WITHOUT LIMITATION, WARRANTIES OR CONDITIONS OF TITLE,
+NON-INFRINGEMENT, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
+ITS USE AND OPERATION EITHER ALONE OR IN COMBINATION WITH OTHER
+PRODUCTS.
+
+IN NO EVENT SHALL NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT,
+INCIDENTAL, EXEMPLARY, CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, LOST PROFITS; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) OR ARISING IN ANY WAY
+OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE
+NVIDIA SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT,
+TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF
+NVIDIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+\****************************************************************************/
+
+#ifndef _CRT_SECURE_NO_WARNINGS
+#define _CRT_SECURE_NO_WARNINGS
+#endif
+
+#include <cassert>
+#include <cstdlib>
+#include <cstring>
+
+#include "PpContext.h"
+#include "PpTokens.h"
+
+namespace {
+
+using namespace glslang;
+
+const struct {
+    int val;
+    const char* str;
+} tokens[] = {
+
+    { PPAtomAddAssign,      "+=" },
+    { PPAtomSubAssign,      "-=" },
+    { PPAtomMulAssign,      "*=" },
+    { PPAtomDivAssign,      "/=" },
+    { PPAtomModAssign,      "%=" },
+
+    { PpAtomRight,          ">>" },
+    { PpAtomLeft,           "<<" },
+    { PpAtomAnd,            "&&" },
+    { PpAtomOr,             "||" },
+    { PpAtomXor,            "^^" },
+
+    { PpAtomRightAssign,    ">>=" },
+    { PpAtomLeftAssign,     "<<=" },
+    { PpAtomAndAssign,      "&=" },
+    { PpAtomOrAssign,       "|=" },
+    { PpAtomXorAssign,      "^=" },
+
+    { PpAtomEQ,             "==" },
+    { PpAtomNE,             "!=" },
+    { PpAtomGE,             ">=" },
+    { PpAtomLE,             "<=" },
+
+    { PpAtomDecrement,      "--" },
+    { PpAtomIncrement,      "++" },
+
+    { PpAtomColonColon,     "::" },
+
+    { PpAtomDefine,         "define" },
+    { PpAtomUndef,          "undef" },
+    { PpAtomIf,             "if" },
+    { PpAtomElif,           "elif" },
+    { PpAtomElse,           "else" },
+    { PpAtomEndif,          "endif" },
+    { PpAtomIfdef,          "ifdef" },
+    { PpAtomIfndef,         "ifndef" },
+    { PpAtomLine,           "line" },
+    { PpAtomPragma,         "pragma" },
+    { PpAtomError,          "error" },
+
+    { PpAtomVersion,        "version" },
+    { PpAtomCore,           "core" },
+    { PpAtomCompatibility,  "compatibility" },
+    { PpAtomEs,             "es" },
+    { PpAtomExtension,      "extension" },
+
+    { PpAtomLineMacro,       "__LINE__" },
+    { PpAtomFileMacro,       "__FILE__" },
+    { PpAtomVersionMacro,    "__VERSION__" },
+
+    { PpAtomInclude,         "include" },
+};
+
+} // end anonymous namespace
+
+namespace glslang {
+
+//
+// Initialize the atom table.
+//
+TStringAtomMap::TStringAtomMap()
+{
+    badToken.assign("<bad token>");
+
+    // Add single character tokens to the atom table:
+    const char* s = "~!%^&*()-+=|,.<>/?;:[]{}#\\";
+    char t[2];
+
+    t[1] = '\0';
+    while (*s) {
+        t[0] = *s;
+        addAtomFixed(t, s[0]);
+        s++;
+    }
+
+    // Add multiple character scanner tokens :
+    for (size_t ii = 0; ii < sizeof(tokens)/sizeof(tokens[0]); ii++)
+        addAtomFixed(tokens[ii].str, tokens[ii].val);
+
+    nextAtom = PpAtomLast;
+}
+
+} // end namespace glslang

dep/glslang/glslang/MachineIndependent/preprocessor/PpContext.cpp

@@ -0,0 +1,120 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// Copyright (C) 2013 LunarG, Inc.
+// Copyright (C) 2015-2018 Google, Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+/****************************************************************************\
+Copyright (c) 2002, NVIDIA Corporation.
+
+NVIDIA Corporation("NVIDIA") supplies this software to you in
+consideration of your agreement to the following terms, and your use,
+installation, modification or redistribution of this NVIDIA software
+constitutes acceptance of these terms.  If you do not agree with these
+terms, please do not use, install, modify or redistribute this NVIDIA
+software.
+
+In consideration of your agreement to abide by the following terms, and
+subject to these terms, NVIDIA grants you a personal, non-exclusive
+license, under NVIDIA's copyrights in this original NVIDIA software (the
+"NVIDIA Software"), to use, reproduce, modify and redistribute the
+NVIDIA Software, with or without modifications, in source and/or binary
+forms; provided that if you redistribute the NVIDIA Software, you must
+retain the copyright notice of NVIDIA, this notice and the following
+text and disclaimers in all such redistributions of the NVIDIA Software.
+Neither the name, trademarks, service marks nor logos of NVIDIA
+Corporation may be used to endorse or promote products derived from the
+NVIDIA Software without specific prior written permission from NVIDIA.
+Except as expressly stated in this notice, no other rights or licenses
+express or implied, are granted by NVIDIA herein, including but not
+limited to any patent rights that may be infringed by your derivative
+works or by other works in which the NVIDIA Software may be
+incorporated. No hardware is licensed hereunder.
+
+THE NVIDIA SOFTWARE IS BEING PROVIDED ON AN "AS IS" BASIS, WITHOUT
+WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED,
+INCLUDING WITHOUT LIMITATION, WARRANTIES OR CONDITIONS OF TITLE,
+NON-INFRINGEMENT, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
+ITS USE AND OPERATION EITHER ALONE OR IN COMBINATION WITH OTHER
+PRODUCTS.
+
+IN NO EVENT SHALL NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT,
+INCIDENTAL, EXEMPLARY, CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, LOST PROFITS; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) OR ARISING IN ANY WAY
+OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE
+NVIDIA SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT,
+TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF
+NVIDIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+\****************************************************************************/
+
+#include <cstdlib>
+#include <locale>
+
+#include "PpContext.h"
+
+namespace glslang {
+
+TPpContext::TPpContext(TParseContextBase& pc, const std::string& rootFileName, TShader::Includer& inclr) :
+    preamble(0), strings(0), previous_token('\n'), parseContext(pc), includer(inclr), inComment(false),
+    rootFileName(rootFileName),
+    currentSourceFile(rootFileName),
+    disableEscapeSequences(false)
+{
+    ifdepth = 0;
+    for (elsetracker = 0; elsetracker < maxIfNesting; elsetracker++)
+        elseSeen[elsetracker] = false;
+    elsetracker = 0;
+
+    strtodStream.imbue(std::locale::classic());
+}
+
+TPpContext::~TPpContext()
+{
+    delete [] preamble;
+
+    // free up the inputStack
+    while (! inputStack.empty())
+        popInput();
+}
+
+void TPpContext::setInput(TInputScanner& input, bool versionWillBeError)
+{
+    assert(inputStack.size() == 0);
+
+    pushInput(new tStringInput(this, input));
+
+    errorOnVersion = versionWillBeError;
+    versionSeen = false;
+}
+
+} // end namespace glslang

dep/glslang/glslang/MachineIndependent/preprocessor/PpContext.h

@@ -0,0 +1,703 @@
+//
+// Copyright (C) 2013 LunarG, Inc.
+// Copyright (C) 2015-2018 Google, Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+/****************************************************************************\
+Copyright (c) 2002, NVIDIA Corporation.
+
+NVIDIA Corporation("NVIDIA") supplies this software to you in
+consideration of your agreement to the following terms, and your use,
+installation, modification or redistribution of this NVIDIA software
+constitutes acceptance of these terms.  If you do not agree with these
+terms, please do not use, install, modify or redistribute this NVIDIA
+software.
+
+In consideration of your agreement to abide by the following terms, and
+subject to these terms, NVIDIA grants you a personal, non-exclusive
+license, under NVIDIA's copyrights in this original NVIDIA software (the
+"NVIDIA Software"), to use, reproduce, modify and redistribute the
+NVIDIA Software, with or without modifications, in source and/or binary
+forms; provided that if you redistribute the NVIDIA Software, you must
+retain the copyright notice of NVIDIA, this notice and the following
+text and disclaimers in all such redistributions of the NVIDIA Software.
+Neither the name, trademarks, service marks nor logos of NVIDIA
+Corporation may be used to endorse or promote products derived from the
+NVIDIA Software without specific prior written permission from NVIDIA.
+Except as expressly stated in this notice, no other rights or licenses
+express or implied, are granted by NVIDIA herein, including but not
+limited to any patent rights that may be infringed by your derivative
+works or by other works in which the NVIDIA Software may be
+incorporated. No hardware is licensed hereunder.
+
+THE NVIDIA SOFTWARE IS BEING PROVIDED ON AN "AS IS" BASIS, WITHOUT
+WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED,
+INCLUDING WITHOUT LIMITATION, WARRANTIES OR CONDITIONS OF TITLE,
+NON-INFRINGEMENT, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
+ITS USE AND OPERATION EITHER ALONE OR IN COMBINATION WITH OTHER
+PRODUCTS.
+
+IN NO EVENT SHALL NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT,
+INCIDENTAL, EXEMPLARY, CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, LOST PROFITS; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) OR ARISING IN ANY WAY
+OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE
+NVIDIA SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT,
+TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF
+NVIDIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+\****************************************************************************/
+
+#ifndef PPCONTEXT_H
+#define PPCONTEXT_H
+
+#include <stack>
+#include <unordered_map>
+#include <sstream>
+
+#include "../ParseHelper.h"
+#include "PpTokens.h"
+
+/* windows only pragma */
+#ifdef _MSC_VER
+    #pragma warning(disable : 4127)
+#endif
+
+namespace glslang {
+
+class TPpToken {
+public:
+    TPpToken() { clear(); }
+    void clear()
+    {
+        space = false;
+        i64val = 0;
+        loc.init();
+        name[0] = 0;
+    }
+
+    // Used for comparing macro definitions, so checks what is relevant for that.
+    bool operator==(const TPpToken& right) const
+    {
+        return space == right.space &&
+               ival == right.ival && dval == right.dval && i64val == right.i64val &&
+               strncmp(name, right.name, MaxTokenLength) == 0;
+    }
+    bool operator!=(const TPpToken& right) const { return ! operator==(right); }
+
+    TSourceLoc loc;
+    // True if a space (for white space or a removed comment) should also be
+    // recognized, in front of the token returned:
+    bool space;
+    // Numeric value of the token:
+    union {
+        int ival;
+        double dval;
+        long long i64val;
+    };
+    // Text string of the token:
+    char name[MaxTokenLength + 1];
+};
+
+class TStringAtomMap {
+//
+// Implementation is in PpAtom.cpp
+//
+// Maintain a bi-directional mapping between relevant preprocessor strings and
+// "atoms" which a unique integers (small, contiguous, not hash-like) per string.
+//
+public:
+    TStringAtomMap();
+
+    // Map string -> atom.
+    // Return 0 if no existing string.
+    int getAtom(const char* s) const
+    {
+        auto it = atomMap.find(s);
+        return it == atomMap.end() ? 0 : it->second;
+    }
+
+    // Map a new or existing string -> atom, inventing a new atom if necessary.
+    int getAddAtom(const char* s)
+    {
+        int atom = getAtom(s);
+        if (atom == 0) {
+            atom = nextAtom++;
+            addAtomFixed(s, atom);
+        }
+        return atom;
+    }
+
+    // Map atom -> string.
+    const char* getString(int atom) const { return stringMap[atom]->c_str(); }
+
+protected:
+    TStringAtomMap(TStringAtomMap&);
+    TStringAtomMap& operator=(TStringAtomMap&);
+
+    TUnorderedMap<TString, int> atomMap;
+    TVector<const TString*> stringMap;    // these point into the TString in atomMap
+    int nextAtom;
+
+    // Bad source characters can lead to bad atoms, so gracefully handle those by
+    // pre-filling the table with them (to avoid if tests later).
+    TString badToken;
+
+    // Add bi-directional mappings:
+    //  - string -> atom
+    //  - atom -> string
+    void addAtomFixed(const char* s, int atom)
+    {
+        auto it = atomMap.insert(std::pair<TString, int>(s, atom)).first;
+        if (stringMap.size() < (size_t)atom + 1)
+            stringMap.resize(atom + 100, &badToken);
+        stringMap[atom] = &it->first;
+    }
+};
+
+class TInputScanner;
+
+enum MacroExpandResult {
+    MacroExpandNotStarted, // macro not expanded, which might not be an error
+    MacroExpandError,      // a clear error occurred while expanding, no expansion
+    MacroExpandStarted,    // macro expansion process has started
+    MacroExpandUndef       // macro is undefined and will be expanded
+};
+
+// This class is the result of turning a huge pile of C code communicating through globals
+// into a class.  This was done to allowing instancing to attain thread safety.
+// Don't expect too much in terms of OO design.
+class TPpContext {
+public:
+    TPpContext(TParseContextBase&, const std::string& rootFileName, TShader::Includer&);
+    virtual ~TPpContext();
+
+    void setPreamble(const char* preamble, size_t length);
+
+    int tokenize(TPpToken& ppToken);
+    int tokenPaste(int token, TPpToken&);
+
+    class tInput {
+    public:
+        tInput(TPpContext* p) : done(false), pp(p) { }
+        virtual ~tInput() { }
+
+        virtual int scan(TPpToken*) = 0;
+        virtual int getch() = 0;
+        virtual void ungetch() = 0;
+        virtual bool peekPasting() { return false; }             // true when about to see ##
+        virtual bool peekContinuedPasting(int) { return false; } // true when non-spaced tokens can paste
+        virtual bool endOfReplacementList() { return false; } // true when at the end of a macro replacement list (RHS of #define)
+        virtual bool isMacroInput() { return false; }
+
+        // Will be called when we start reading tokens from this instance
+        virtual void notifyActivated() {}
+        // Will be called when we do not read tokens from this instance anymore
+        virtual void notifyDeleted() {}
+    protected:
+        bool done;
+        TPpContext* pp;
+    };
+
+    void setInput(TInputScanner& input, bool versionWillBeError);
+
+    void pushInput(tInput* in)
+    {
+        inputStack.push_back(in);
+        in->notifyActivated();
+    }
+    void popInput()
+    {
+        inputStack.back()->notifyDeleted();
+        delete inputStack.back();
+        inputStack.pop_back();
+    }
+
+    //
+    // From PpTokens.cpp
+    //
+
+    // Capture the needed parts of a token stream for macro recording/playback.
+    class TokenStream {
+    public:
+        // Manage a stream of these 'Token', which capture the relevant parts
+        // of a TPpToken, plus its atom.
+        class Token {
+        public:
+            Token(int atom, const TPpToken& ppToken) : 
+                atom(atom),
+                space(ppToken.space),
+                i64val(ppToken.i64val),
+                name(ppToken.name) { }
+            int get(TPpToken& ppToken)
+            {
+                ppToken.clear();
+                ppToken.space = space;
+                ppToken.i64val = i64val;
+                snprintf(ppToken.name, sizeof(ppToken.name), "%s", name.c_str());
+                return atom;
+            }
+            bool isAtom(int a) const { return atom == a; }
+            int getAtom() const { return atom; }
+            bool nonSpaced() const { return !space; }
+        protected:
+            Token() {}
+            int atom;
+            bool space;        // did a space precede the token?
+            long long i64val;
+            TString name;
+        };
+
+        TokenStream() : currentPos(0) { }
+
+        void putToken(int token, TPpToken* ppToken);
+        bool peekToken(int atom) { return !atEnd() && stream[currentPos].isAtom(atom); }
+        bool peekContinuedPasting(int atom)
+        {
+            // This is basically necessary because, for example, the PP
+            // tokenizer only accepts valid numeric-literals plus suffixes, so
+            // separates numeric-literals plus bad suffix into two tokens, which
+            // should get both pasted together as one token when token pasting.
+            //
+            // The following code is a bit more generalized than the above example.
+            if (!atEnd() && atom == PpAtomIdentifier && stream[currentPos].nonSpaced()) {
+                switch(stream[currentPos].getAtom()) {
+                    case PpAtomConstInt:
+                    case PpAtomConstUint:
+                    case PpAtomConstInt64:
+                    case PpAtomConstUint64:
+                    case PpAtomConstInt16:
+                    case PpAtomConstUint16:
+                    case PpAtomConstFloat:
+                    case PpAtomConstDouble:
+                    case PpAtomConstFloat16:
+                    case PpAtomConstString:
+                    case PpAtomIdentifier:
+                        return true;
+                    default:
+                        break;
+                }
+            }
+
+            return false;
+        }
+        int getToken(TParseContextBase&, TPpToken*);
+        bool atEnd() { return currentPos >= stream.size(); }
+        bool peekTokenizedPasting(bool lastTokenPastes);
+        bool peekUntokenizedPasting();
+        void reset() { currentPos = 0; }
+
+    protected:
+        TVector<Token> stream;
+        size_t currentPos;
+    };
+
+    //
+    // From Pp.cpp
+    //
+
+    struct MacroSymbol {
+        MacroSymbol() : functionLike(0), busy(0), undef(0) { }
+        TVector<int> args;
+        TokenStream body;
+        unsigned functionLike : 1;  // 0 means object-like, 1 means function-like
+        unsigned busy         : 1;
+        unsigned undef        : 1;
+    };
+
+    typedef TMap<int, MacroSymbol> TSymbolMap;
+    TSymbolMap macroDefs;  // map atoms to macro definitions
+    MacroSymbol* lookupMacroDef(int atom)
+    {
+        auto existingMacroIt = macroDefs.find(atom);
+        return (existingMacroIt == macroDefs.end()) ? nullptr : &(existingMacroIt->second);
+    }
+    void addMacroDef(int atom, MacroSymbol& macroDef) { macroDefs[atom] = macroDef; }
+
+protected:
+    TPpContext(TPpContext&);
+    TPpContext& operator=(TPpContext&);
+
+    TStringAtomMap atomStrings;
+    char*   preamble;               // string to parse, all before line 1 of string 0, it is 0 if no preamble
+    int     preambleLength;
+    char**  strings;                // official strings of shader, starting a string 0 line 1
+    size_t* lengths;
+    int     numStrings;             // how many official strings there are
+    int     currentString;          // which string we're currently parsing  (-1 for preamble)
+
+    // Scanner data:
+    int previous_token;
+    TParseContextBase& parseContext;
+
+    // Get the next token from *stack* of input sources, popping input sources
+    // that are out of tokens, down until an input source is found that has a token.
+    // Return EndOfInput when there are no more tokens to be found by doing this.
+    int scanToken(TPpToken* ppToken)
+    {
+        int token = EndOfInput;
+
+        while (! inputStack.empty()) {
+            token = inputStack.back()->scan(ppToken);
+            if (token != EndOfInput || inputStack.empty())
+                break;
+            popInput();
+        }
+
+        return token;
+    }
+    int  getChar() { return inputStack.back()->getch(); }
+    void ungetChar() { inputStack.back()->ungetch(); }
+    bool peekPasting() { return !inputStack.empty() && inputStack.back()->peekPasting(); }
+    bool peekContinuedPasting(int a)
+    {
+        return !inputStack.empty() && inputStack.back()->peekContinuedPasting(a);
+    }
+    bool endOfReplacementList() { return inputStack.empty() || inputStack.back()->endOfReplacementList(); }
+    bool isMacroInput() { return inputStack.size() > 0 && inputStack.back()->isMacroInput(); }
+
+    static const int maxIfNesting = 65;
+
+    int ifdepth;                  // current #if-#else-#endif nesting in the cpp.c file (pre-processor)
+    bool elseSeen[maxIfNesting];  // Keep a track of whether an else has been seen at a particular depth
+    int elsetracker;              // #if-#else and #endif constructs...Counter.
+
+    class tMacroInput : public tInput {
+    public:
+        tMacroInput(TPpContext* pp) : tInput(pp), prepaste(false), postpaste(false) { }
+        virtual ~tMacroInput()
+        {
+            for (size_t i = 0; i < args.size(); ++i)
+                delete args[i];
+            for (size_t i = 0; i < expandedArgs.size(); ++i)
+                delete expandedArgs[i];
+        }
+
+        virtual int scan(TPpToken*) override;
+        virtual int getch() override { assert(0); return EndOfInput; }
+        virtual void ungetch() override { assert(0); }
+        bool peekPasting() override { return prepaste; }
+        bool peekContinuedPasting(int a) override { return mac->body.peekContinuedPasting(a); }
+        bool endOfReplacementList() override { return mac->body.atEnd(); }
+        bool isMacroInput() override { return true; }
+
+        MacroSymbol *mac;
+        TVector<TokenStream*> args;
+        TVector<TokenStream*> expandedArgs;
+
+    protected:
+        bool prepaste;         // true if we are just before ##
+        bool postpaste;        // true if we are right after ##
+    };
+
+    class tMarkerInput : public tInput {
+    public:
+        tMarkerInput(TPpContext* pp) : tInput(pp) { }
+        virtual int scan(TPpToken*) override
+        {
+            if (done)
+                return EndOfInput;
+            done = true;
+
+            return marker;
+        }
+        virtual int getch() override { assert(0); return EndOfInput; }
+        virtual void ungetch() override { assert(0); }
+        static const int marker = -3;
+    };
+
+    class tZeroInput : public tInput {
+    public:
+        tZeroInput(TPpContext* pp) : tInput(pp) { }
+        virtual int scan(TPpToken*) override;
+        virtual int getch() override { assert(0); return EndOfInput; }
+        virtual void ungetch() override { assert(0); }
+    };
+
+    std::vector<tInput*> inputStack;
+    bool errorOnVersion;
+    bool versionSeen;
+
+    //
+    // from Pp.cpp
+    //
+
+    // Used to obtain #include content.
+    TShader::Includer& includer;
+
+    int CPPdefine(TPpToken * ppToken);
+    int CPPundef(TPpToken * ppToken);
+    int CPPelse(int matchelse, TPpToken * ppToken);
+    int extraTokenCheck(int atom, TPpToken* ppToken, int token);
+    int eval(int token, int precedence, bool shortCircuit, int& res, bool& err, TPpToken * ppToken);
+    int evalToToken(int token, bool shortCircuit, int& res, bool& err, TPpToken * ppToken);
+    int CPPif (TPpToken * ppToken);
+    int CPPifdef(int defined, TPpToken * ppToken);
+    int CPPinclude(TPpToken * ppToken);
+    int CPPline(TPpToken * ppToken);
+    int CPPerror(TPpToken * ppToken);
+    int CPPpragma(TPpToken * ppToken);
+    int CPPversion(TPpToken * ppToken);
+    int CPPextension(TPpToken * ppToken);
+    int readCPPline(TPpToken * ppToken);
+    int scanHeaderName(TPpToken* ppToken, char delimit);
+    TokenStream* PrescanMacroArg(TokenStream&, TPpToken*, bool newLineOkay);
+    MacroExpandResult MacroExpand(TPpToken* ppToken, bool expandUndef, bool newLineOkay);
+
+    //
+    // From PpTokens.cpp
+    //
+    void pushTokenStreamInput(TokenStream&, bool pasting = false);
+    void UngetToken(int token, TPpToken*);
+
+    class tTokenInput : public tInput {
+    public:
+        tTokenInput(TPpContext* pp, TokenStream* t, bool prepasting) :
+            tInput(pp),
+            tokens(t),
+            lastTokenPastes(prepasting) { }
+        virtual int scan(TPpToken *ppToken) override { return tokens->getToken(pp->parseContext, ppToken); }
+        virtual int getch() override { assert(0); return EndOfInput; }
+        virtual void ungetch() override { assert(0); }
+        virtual bool peekPasting() override { return tokens->peekTokenizedPasting(lastTokenPastes); }
+        bool peekContinuedPasting(int a) override { return tokens->peekContinuedPasting(a); }
+    protected:
+        TokenStream* tokens;
+        bool lastTokenPastes; // true if the last token in the input is to be pasted, rather than consumed as a token
+    };
+
+    class tUngotTokenInput : public tInput {
+    public:
+        tUngotTokenInput(TPpContext* pp, int t, TPpToken* p) : tInput(pp), token(t), lval(*p) { }
+        virtual int scan(TPpToken *) override;
+        virtual int getch() override { assert(0); return EndOfInput; }
+        virtual void ungetch() override { assert(0); }
+    protected:
+        int token;
+        TPpToken lval;
+    };
+
+    //
+    // From PpScanner.cpp
+    //
+    class tStringInput : public tInput {
+    public:
+        tStringInput(TPpContext* pp, TInputScanner& i) : tInput(pp), input(&i) { }
+        virtual int scan(TPpToken*) override;
+
+        // Scanner used to get source stream characters.
+        //  - Escaped newlines are handled here, invisibly to the caller.
+        //  - All forms of newline are handled, and turned into just a '\n'.
+        int getch() override
+        {
+            int ch = input->get();
+
+            if (ch == '\\') {
+                // Move past escaped newlines, as many as sequentially exist
+                do {
+                    if (input->peek() == '\r' || input->peek() == '\n') {
+                        bool allowed = pp->parseContext.lineContinuationCheck(input->getSourceLoc(), pp->inComment);
+                        if (! allowed && pp->inComment)
+                            return '\\';
+
+                        // escape one newline now
+                        ch = input->get();
+                        int nextch = input->get();
+                        if (ch == '\r' && nextch == '\n')
+                            ch = input->get();
+                        else
+                            ch = nextch;
+                    } else
+                        return '\\';
+                } while (ch == '\\');
+            }
+
+            // handle any non-escaped newline
+            if (ch == '\r' || ch == '\n') {
+                if (ch == '\r' && input->peek() == '\n')
+                    input->get();
+                return '\n';
+            }
+
+            return ch;
+        }
+
+        // Scanner used to backup the source stream characters.  Newlines are
+        // handled here, invisibly to the caller, meaning have to undo exactly
+        // what getch() above does (e.g., don't leave things in the middle of a
+        // sequence of escaped newlines).
+        void ungetch() override
+        {
+            input->unget();
+
+            do {
+                int ch = input->peek();
+                if (ch == '\r' || ch == '\n') {
+                    if (ch == '\n') {
+                        // correct for two-character newline
+                        input->unget();
+                        if (input->peek() != '\r')
+                            input->get();
+                    }
+                    // now in front of a complete newline, move past an escape character
+                    input->unget();
+                    if (input->peek() == '\\')
+                        input->unget();
+                    else {
+                        input->get();
+                        break;
+                    }
+                } else
+                    break;
+            } while (true);
+        }
+
+    protected:
+        TInputScanner* input;
+    };
+
+    // Holds a reference to included file data, as well as a
+    // prologue and an epilogue string. This can be scanned using the tInput
+    // interface and acts as a single source string.
+    class TokenizableIncludeFile : public tInput {
+    public:
+        // Copies prologue and epilogue. The includedFile must remain valid
+        // until this TokenizableIncludeFile is no longer used.
+        TokenizableIncludeFile(const TSourceLoc& startLoc,
+                          const std::string& prologue,
+                          TShader::Includer::IncludeResult* includedFile,
+                          const std::string& epilogue,
+                          TPpContext* pp)
+            : tInput(pp),
+              prologue_(prologue),
+              epilogue_(epilogue),
+              includedFile_(includedFile),
+              scanner(3, strings, lengths, nullptr, 0, 0, true),
+              prevScanner(nullptr),
+              stringInput(pp, scanner)
+        {
+              strings[0] = prologue_.data();
+              strings[1] = includedFile_->headerData;
+              strings[2] = epilogue_.data();
+
+              lengths[0] = prologue_.size();
+              lengths[1] = includedFile_->headerLength;
+              lengths[2] = epilogue_.size();
+
+              scanner.setLine(startLoc.line);
+              scanner.setString(startLoc.string);
+
+              scanner.setFile(startLoc.getFilenameStr(), 0);
+              scanner.setFile(startLoc.getFilenameStr(), 1);
+              scanner.setFile(startLoc.getFilenameStr(), 2);
+        }
+
+        // tInput methods:
+        int scan(TPpToken* t) override { return stringInput.scan(t); }
+        int getch() override { return stringInput.getch(); }
+        void ungetch() override { stringInput.ungetch(); }
+
+        void notifyActivated() override
+        {
+            prevScanner = pp->parseContext.getScanner();
+            pp->parseContext.setScanner(&scanner);
+            pp->push_include(includedFile_);
+        }
+
+        void notifyDeleted() override
+        {
+            pp->parseContext.setScanner(prevScanner);
+            pp->pop_include();
+        }
+
+    private:
+        TokenizableIncludeFile& operator=(const TokenizableIncludeFile&);
+
+        // Stores the prologue for this string.
+        const std::string prologue_;
+
+        // Stores the epilogue for this string.
+        const std::string epilogue_;
+
+        // Points to the IncludeResult that this TokenizableIncludeFile represents.
+        TShader::Includer::IncludeResult* includedFile_;
+
+        // Will point to prologue_, includedFile_->headerData and epilogue_
+        // This is passed to scanner constructor.
+        // These do not own the storage and it must remain valid until this
+        // object has been destroyed.
+        const char* strings[3];
+        // Length of str_, passed to scanner constructor.
+        size_t lengths[3];
+        // Scans over str_.
+        TInputScanner scanner;
+        // The previous effective scanner before the scanner in this instance
+        // has been activated.
+        TInputScanner* prevScanner;
+        // Delegate object implementing the tInput interface.
+        tStringInput stringInput;
+    };
+
+    int ScanFromString(char* s);
+    void missingEndifCheck();
+    int lFloatConst(int len, int ch, TPpToken* ppToken);
+    int characterLiteral(TPpToken* ppToken);
+
+    void push_include(TShader::Includer::IncludeResult* result)
+    {
+        currentSourceFile = result->headerName;
+        includeStack.push(result);
+    }
+
+    void pop_include()
+    {
+        TShader::Includer::IncludeResult* include = includeStack.top();
+        includeStack.pop();
+        includer.releaseInclude(include);
+        if (includeStack.empty()) {
+            currentSourceFile = rootFileName;
+        } else {
+            currentSourceFile = includeStack.top()->headerName;
+        }
+    }
+
+    bool inComment;
+    std::string rootFileName;
+    std::stack<TShader::Includer::IncludeResult*> includeStack;
+    std::string currentSourceFile;
+
+    std::istringstream strtodStream;
+    bool disableEscapeSequences;
+};
+
+} // end namespace glslang
+
+#endif  // PPCONTEXT_H

dep/glslang/glslang/MachineIndependent/preprocessor/PpTokens.cpp

@@ -0,0 +1,221 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// Copyright (C) 2013 LunarG, Inc.
+// Copyright (C) 2015-2018 Google, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+/****************************************************************************\
+Copyright (c) 2002, NVIDIA Corporation.
+
+NVIDIA Corporation("NVIDIA") supplies this software to you in
+consideration of your agreement to the following terms, and your use,
+installation, modification or redistribution of this NVIDIA software
+constitutes acceptance of these terms.  If you do not agree with these
+terms, please do not use, install, modify or redistribute this NVIDIA
+software.
+
+In consideration of your agreement to abide by the following terms, and
+subject to these terms, NVIDIA grants you a personal, non-exclusive
+license, under NVIDIA's copyrights in this original NVIDIA software (the
+"NVIDIA Software"), to use, reproduce, modify and redistribute the
+NVIDIA Software, with or without modifications, in source and/or binary
+forms; provided that if you redistribute the NVIDIA Software, you must
+retain the copyright notice of NVIDIA, this notice and the following
+text and disclaimers in all such redistributions of the NVIDIA Software.
+Neither the name, trademarks, service marks nor logos of NVIDIA
+Corporation may be used to endorse or promote products derived from the
+NVIDIA Software without specific prior written permission from NVIDIA.
+Except as expressly stated in this notice, no other rights or licenses
+express or implied, are granted by NVIDIA herein, including but not
+limited to any patent rights that may be infringed by your derivative
+works or by other works in which the NVIDIA Software may be
+incorporated. No hardware is licensed hereunder.
+
+THE NVIDIA SOFTWARE IS BEING PROVIDED ON AN "AS IS" BASIS, WITHOUT
+WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED,
+INCLUDING WITHOUT LIMITATION, WARRANTIES OR CONDITIONS OF TITLE,
+NON-INFRINGEMENT, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
+ITS USE AND OPERATION EITHER ALONE OR IN COMBINATION WITH OTHER
+PRODUCTS.
+
+IN NO EVENT SHALL NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT,
+INCIDENTAL, EXEMPLARY, CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, LOST PROFITS; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) OR ARISING IN ANY WAY
+OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE
+NVIDIA SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT,
+TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF
+NVIDIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+\****************************************************************************/
+
+//
+// For recording and playing back the stream of tokens in a macro definition.
+//
+
+#ifndef _CRT_SECURE_NO_WARNINGS
+#define _CRT_SECURE_NO_WARNINGS
+#endif
+#if (defined(_MSC_VER) && _MSC_VER < 1900 /*vs2015*/)
+#define snprintf sprintf_s
+#endif
+
+#include <cassert>
+#include <cstdlib>
+#include <cstring>
+#include <cctype>
+
+#include "PpContext.h"
+#include "PpTokens.h"
+
+namespace glslang {
+
+// Add a token (including backing string) to the end of a macro
+// token stream, for later playback.
+void TPpContext::TokenStream::putToken(int atom, TPpToken* ppToken)
+{
+    TokenStream::Token streamToken(atom, *ppToken);
+    stream.push_back(streamToken);
+}
+
+// Read the next token from a macro token stream.
+int TPpContext::TokenStream::getToken(TParseContextBase& parseContext, TPpToken *ppToken)
+{
+    if (atEnd())
+        return EndOfInput;
+
+    int atom = stream[currentPos++].get(*ppToken);
+    ppToken->loc = parseContext.getCurrentLoc();
+
+#ifndef GLSLANG_WEB
+    // Check for ##, unless the current # is the last character
+    if (atom == '#') {
+        if (peekToken('#')) {
+            parseContext.requireProfile(ppToken->loc, ~EEsProfile, "token pasting (##)");
+            parseContext.profileRequires(ppToken->loc, ~EEsProfile, 130, 0, "token pasting (##)");
+            currentPos++;
+            atom = PpAtomPaste;
+        }
+    }
+#endif
+
+    return atom;
+}
+
+// We are pasting if
+//   1. we are preceding a pasting operator within this stream
+// or
+//   2. the entire macro is preceding a pasting operator (lastTokenPastes)
+//      and we are also on the last token
+bool TPpContext::TokenStream::peekTokenizedPasting(bool lastTokenPastes)
+{
+    // 1. preceding ##?
+
+    size_t savePos = currentPos;
+    // skip white space
+    while (peekToken(' '))
+        ++currentPos;
+    if (peekToken(PpAtomPaste)) {
+        currentPos = savePos;
+        return true;
+    }
+
+    // 2. last token and we've been told after this there will be a ##
+
+    if (! lastTokenPastes)
+        return false;
+    // Getting here means the last token will be pasted, after this
+
+    // Are we at the last non-whitespace token?
+    savePos = currentPos;
+    bool moreTokens = false;
+    do {
+        if (atEnd())
+            break;
+        if (!peekToken(' ')) {
+            moreTokens = true;
+            break;
+        }
+        ++currentPos;
+    } while (true);
+    currentPos = savePos;
+
+    return !moreTokens;
+}
+
+// See if the next non-white-space tokens are two consecutive #
+bool TPpContext::TokenStream::peekUntokenizedPasting()
+{
+    // don't return early, have to restore this
+    size_t savePos = currentPos;
+
+    // skip white-space
+    while (peekToken(' '))
+        ++currentPos;
+
+    // check for ##
+    bool pasting = false;
+    if (peekToken('#')) {
+        ++currentPos;
+        if (peekToken('#'))
+            pasting = true;
+    }
+
+    currentPos = savePos;
+
+    return pasting;
+}
+
+void TPpContext::pushTokenStreamInput(TokenStream& ts, bool prepasting)
+{
+    pushInput(new tTokenInput(this, &ts, prepasting));
+    ts.reset();
+}
+
+int TPpContext::tUngotTokenInput::scan(TPpToken* ppToken)
+{
+    if (done)
+        return EndOfInput;
+
+    int ret = token;
+    *ppToken = lval;
+    done = true;
+
+    return ret;
+}
+
+void TPpContext::UngetToken(int token, TPpToken* ppToken)
+{
+    pushInput(new tUngotTokenInput(this, token, ppToken));
+}
+
+} // end namespace glslang

dep/glslang/glslang/MachineIndependent/preprocessor/PpTokens.h

@@ -0,0 +1,179 @@
+//
+// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+/****************************************************************************\
+Copyright (c) 2002, NVIDIA Corporation.
+
+NVIDIA Corporation("NVIDIA") supplies this software to you in
+consideration of your agreement to the following terms, and your use,
+installation, modification or redistribution of this NVIDIA software
+constitutes acceptance of these terms.  If you do not agree with these
+terms, please do not use, install, modify or redistribute this NVIDIA
+software.
+
+In consideration of your agreement to abide by the following terms, and
+subject to these terms, NVIDIA grants you a personal, non-exclusive
+license, under NVIDIA's copyrights in this original NVIDIA software (the
+"NVIDIA Software"), to use, reproduce, modify and redistribute the
+NVIDIA Software, with or without modifications, in source and/or binary
+forms; provided that if you redistribute the NVIDIA Software, you must
+retain the copyright notice of NVIDIA, this notice and the following
+text and disclaimers in all such redistributions of the NVIDIA Software.
+Neither the name, trademarks, service marks nor logos of NVIDIA
+Corporation may be used to endorse or promote products derived from the
+NVIDIA Software without specific prior written permission from NVIDIA.
+Except as expressly stated in this notice, no other rights or licenses
+express or implied, are granted by NVIDIA herein, including but not
+limited to any patent rights that may be infringed by your derivative
+works or by other works in which the NVIDIA Software may be
+incorporated. No hardware is licensed hereunder.
+
+THE NVIDIA SOFTWARE IS BEING PROVIDED ON AN "AS IS" BASIS, WITHOUT
+WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED,
+INCLUDING WITHOUT LIMITATION, WARRANTIES OR CONDITIONS OF TITLE,
+NON-INFRINGEMENT, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
+ITS USE AND OPERATION EITHER ALONE OR IN COMBINATION WITH OTHER
+PRODUCTS.
+
+IN NO EVENT SHALL NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT,
+INCIDENTAL, EXEMPLARY, CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, LOST PROFITS; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) OR ARISING IN ANY WAY
+OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE
+NVIDIA SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT,
+TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF
+NVIDIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+\****************************************************************************/
+
+#ifndef PARSER_H
+#define PARSER_H
+
+namespace glslang {
+
+// Multi-character tokens
+enum EFixedAtoms {
+    // single character tokens get their own char value as their token; start here for multi-character tokens
+    PpAtomMaxSingle = 127,
+
+    // replace bad character tokens with this, to avoid accidental aliasing with the below
+    PpAtomBadToken,
+
+    // Operators
+
+    PPAtomAddAssign,
+    PPAtomSubAssign,
+    PPAtomMulAssign,
+    PPAtomDivAssign,
+    PPAtomModAssign,
+
+    PpAtomRight,
+    PpAtomLeft,
+
+    PpAtomRightAssign,
+    PpAtomLeftAssign,
+    PpAtomAndAssign,
+    PpAtomOrAssign,
+    PpAtomXorAssign,
+
+    PpAtomAnd,
+    PpAtomOr,
+    PpAtomXor,
+
+    PpAtomEQ,
+    PpAtomNE,
+    PpAtomGE,
+    PpAtomLE,
+
+    PpAtomDecrement,
+    PpAtomIncrement,
+
+    PpAtomColonColon,
+
+    PpAtomPaste,
+
+    // Constants
+
+    PpAtomConstInt,
+    PpAtomConstUint,
+    PpAtomConstInt64,
+    PpAtomConstUint64,
+    PpAtomConstInt16,
+    PpAtomConstUint16,
+    PpAtomConstFloat,
+    PpAtomConstDouble,
+    PpAtomConstFloat16,
+    PpAtomConstString,
+
+    // Identifiers
+    PpAtomIdentifier,
+
+    // preprocessor "keywords"
+
+    PpAtomDefine,
+    PpAtomUndef,
+
+    PpAtomIf,
+    PpAtomIfdef,
+    PpAtomIfndef,
+    PpAtomElse,
+    PpAtomElif,
+    PpAtomEndif,
+
+    PpAtomLine,
+    PpAtomPragma,
+    PpAtomError,
+
+    // #version ...
+    PpAtomVersion,
+    PpAtomCore,
+    PpAtomCompatibility,
+    PpAtomEs,
+
+    // #extension
+    PpAtomExtension,
+
+    // __LINE__, __FILE__, __VERSION__
+
+    PpAtomLineMacro,
+    PpAtomFileMacro,
+    PpAtomVersionMacro,
+
+    // #include
+    PpAtomInclude,
+
+    PpAtomLast,
+};
+
+} // end namespace glslang
+
+#endif /* not PARSER_H */

dep/glslang/glslang/MachineIndependent/propagateNoContraction.cpp

@@ -0,0 +1,870 @@
+//
+// Copyright (C) 2015-2016 Google, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of Google Inc. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+
+//
+// Visit the nodes in the glslang intermediate tree representation to
+// propagate the 'noContraction' qualifier.
+//
+
+#ifndef GLSLANG_WEB
+
+#include "propagateNoContraction.h"
+
+#include <cstdlib>
+#include <string>
+#include <tuple>
+#include <unordered_map>
+#include <unordered_set>
+
+#include "localintermediate.h"
+namespace {
+
+// Use a string to hold the access chain information, as in most cases the
+// access chain is short and may contain only one element, which is the symbol
+// ID.
+// Example: struct {float a; float b;} s;
+//  Object s.a will be represented with: <symbol ID of s>/0
+//  Object s.b will be represented with: <symbol ID of s>/1
+//  Object s will be represented with: <symbol ID of s>
+// For members of vector, matrix and arrays, they will be represented with the
+// same symbol ID of their container symbol objects. This is because their
+// preciseness is always the same as their container symbol objects.
+typedef std::string ObjectAccessChain;
+
+// The delimiter used in the ObjectAccessChain string to separate symbol ID and
+// different level of struct indices.
+const char ObjectAccesschainDelimiter = '/';
+
+// Mapping from Symbol IDs of symbol nodes, to their defining operation
+// nodes.
+typedef std::unordered_multimap<ObjectAccessChain, glslang::TIntermOperator*> NodeMapping;
+// Mapping from object nodes to their access chain info string.
+typedef std::unordered_map<glslang::TIntermTyped*, ObjectAccessChain> AccessChainMapping;
+
+// Set of object IDs.
+typedef std::unordered_set<ObjectAccessChain> ObjectAccesschainSet;
+// Set of return branch nodes.
+typedef std::unordered_set<glslang::TIntermBranch*> ReturnBranchNodeSet;
+
+// A helper function to tell whether a node is 'noContraction'. Returns true if
+// the node has 'noContraction' qualifier, otherwise false.
+bool isPreciseObjectNode(glslang::TIntermTyped* node)
+{
+    return node->getType().getQualifier().isNoContraction();
+}
+
+// Returns true if the opcode is a dereferencing one.
+bool isDereferenceOperation(glslang::TOperator op)
+{
+    switch (op) {
+    case glslang::EOpIndexDirect:
+    case glslang::EOpIndexDirectStruct:
+    case glslang::EOpIndexIndirect:
+    case glslang::EOpVectorSwizzle:
+    case glslang::EOpMatrixSwizzle:
+        return true;
+    default:
+        return false;
+    }
+}
+
+// Returns true if the opcode leads to an assignment operation.
+bool isAssignOperation(glslang::TOperator op)
+{
+    switch (op) {
+    case glslang::EOpAssign:
+    case glslang::EOpAddAssign:
+    case glslang::EOpSubAssign:
+    case glslang::EOpMulAssign:
+    case glslang::EOpVectorTimesMatrixAssign:
+    case glslang::EOpVectorTimesScalarAssign:
+    case glslang::EOpMatrixTimesScalarAssign:
+    case glslang::EOpMatrixTimesMatrixAssign:
+    case glslang::EOpDivAssign:
+    case glslang::EOpModAssign:
+    case glslang::EOpAndAssign:
+    case glslang::EOpLeftShiftAssign:
+    case glslang::EOpRightShiftAssign:
+    case glslang::EOpInclusiveOrAssign:
+    case glslang::EOpExclusiveOrAssign:
+
+    case glslang::EOpPostIncrement:
+    case glslang::EOpPostDecrement:
+    case glslang::EOpPreIncrement:
+    case glslang::EOpPreDecrement:
+        return true;
+    default:
+        return false;
+    }
+}
+
+// A helper function to get the unsigned int from a given constant union node.
+// Note the node should only hold a uint scalar.
+unsigned getStructIndexFromConstantUnion(glslang::TIntermTyped* node)
+{
+    assert(node->getAsConstantUnion() && node->getAsConstantUnion()->isScalar());
+    unsigned struct_dereference_index = node->getAsConstantUnion()->getConstArray()[0].getUConst();
+    return struct_dereference_index;
+}
+
+// A helper function to generate symbol_label.
+ObjectAccessChain generateSymbolLabel(glslang::TIntermSymbol* node)
+{
+    ObjectAccessChain symbol_id =
+        std::to_string(node->getId()) + "(" + node->getName().c_str() + ")";
+    return symbol_id;
+}
+
+// Returns true if the operation is an arithmetic operation and valid for
+// the 'NoContraction' decoration.
+bool isArithmeticOperation(glslang::TOperator op)
+{
+    switch (op) {
+    case glslang::EOpAddAssign:
+    case glslang::EOpSubAssign:
+    case glslang::EOpMulAssign:
+    case glslang::EOpVectorTimesMatrixAssign:
+    case glslang::EOpVectorTimesScalarAssign:
+    case glslang::EOpMatrixTimesScalarAssign:
+    case glslang::EOpMatrixTimesMatrixAssign:
+    case glslang::EOpDivAssign:
+    case glslang::EOpModAssign:
+
+    case glslang::EOpNegative:
+
+    case glslang::EOpAdd:
+    case glslang::EOpSub:
+    case glslang::EOpMul:
+    case glslang::EOpDiv:
+    case glslang::EOpMod:
+
+    case glslang::EOpVectorTimesScalar:
+    case glslang::EOpVectorTimesMatrix:
+    case glslang::EOpMatrixTimesVector:
+    case glslang::EOpMatrixTimesScalar:
+    case glslang::EOpMatrixTimesMatrix:
+
+    case glslang::EOpDot:
+
+    case glslang::EOpPostIncrement:
+    case glslang::EOpPostDecrement:
+    case glslang::EOpPreIncrement:
+    case glslang::EOpPreDecrement:
+        return true;
+    default:
+        return false;
+    }
+}
+
+// A helper class to help manage the populating_initial_no_contraction_ flag.
+template <typename T> class StateSettingGuard {
+public:
+    StateSettingGuard(T* state_ptr, T new_state_value)
+        : state_ptr_(state_ptr), previous_state_(*state_ptr)
+    {
+        *state_ptr = new_state_value;
+    }
+    StateSettingGuard(T* state_ptr) : state_ptr_(state_ptr), previous_state_(*state_ptr) {}
+    void setState(T new_state_value) { *state_ptr_ = new_state_value; }
+    ~StateSettingGuard() { *state_ptr_ = previous_state_; }
+
+private:
+    T* state_ptr_;
+    T previous_state_;
+};
+
+// A helper function to get the front element from a given ObjectAccessChain
+ObjectAccessChain getFrontElement(const ObjectAccessChain& chain)
+{
+    size_t pos_delimiter = chain.find(ObjectAccesschainDelimiter);
+    return pos_delimiter == std::string::npos ? chain : chain.substr(0, pos_delimiter);
+}
+
+// A helper function to get the access chain starting from the second element.
+ObjectAccessChain subAccessChainFromSecondElement(const ObjectAccessChain& chain)
+{
+    size_t pos_delimiter = chain.find(ObjectAccesschainDelimiter);
+    return pos_delimiter == std::string::npos ? "" : chain.substr(pos_delimiter + 1);
+}
+
+// A helper function to get the access chain after removing a given prefix.
+ObjectAccessChain getSubAccessChainAfterPrefix(const ObjectAccessChain& chain,
+                                               const ObjectAccessChain& prefix)
+{
+    size_t pos = chain.find(prefix);
+    if (pos != 0)
+        return chain;
+    return chain.substr(prefix.length() + sizeof(ObjectAccesschainDelimiter));
+}
+
+//
+// A traverser which traverses the whole AST and populates:
+//  1) A mapping from symbol nodes' IDs to their defining operation nodes.
+//  2) A set of access chains of the initial precise object nodes.
+//
+class TSymbolDefinitionCollectingTraverser : public glslang::TIntermTraverser {
+public:
+    TSymbolDefinitionCollectingTraverser(NodeMapping* symbol_definition_mapping,
+                                         AccessChainMapping* accesschain_mapping,
+                                         ObjectAccesschainSet* precise_objects,
+                                         ReturnBranchNodeSet* precise_return_nodes);
+
+    bool visitUnary(glslang::TVisit, glslang::TIntermUnary*) override;
+    bool visitBinary(glslang::TVisit, glslang::TIntermBinary*) override;
+    void visitSymbol(glslang::TIntermSymbol*) override;
+    bool visitAggregate(glslang::TVisit, glslang::TIntermAggregate*) override;
+    bool visitBranch(glslang::TVisit, glslang::TIntermBranch*) override;
+
+protected:
+    TSymbolDefinitionCollectingTraverser& operator=(const TSymbolDefinitionCollectingTraverser&);
+
+    // The mapping from symbol node IDs to their defining nodes. This should be
+    // populated along traversing the AST.
+    NodeMapping& symbol_definition_mapping_;
+    // The set of symbol node IDs for precise symbol nodes, the ones marked as
+    // 'noContraction'.
+    ObjectAccesschainSet& precise_objects_;
+    // The set of precise return nodes.
+    ReturnBranchNodeSet& precise_return_nodes_;
+    // A temporary cache of the symbol node whose defining node is to be found
+    // currently along traversing the AST.
+    ObjectAccessChain current_object_;
+    // A map from object node to its access chain. This traverser stores
+    // the built access chains into this map for each object node it has
+    // visited.
+    AccessChainMapping& accesschain_mapping_;
+    // The pointer to the Function Definition node, so we can get the
+    // preciseness of the return expression from it when we traverse the
+    // return branch node.
+    glslang::TIntermAggregate* current_function_definition_node_;
+};
+
+TSymbolDefinitionCollectingTraverser::TSymbolDefinitionCollectingTraverser(
+    NodeMapping* symbol_definition_mapping, AccessChainMapping* accesschain_mapping,
+    ObjectAccesschainSet* precise_objects,
+    std::unordered_set<glslang::TIntermBranch*>* precise_return_nodes)
+    : TIntermTraverser(true, false, false), symbol_definition_mapping_(*symbol_definition_mapping),
+      precise_objects_(*precise_objects), precise_return_nodes_(*precise_return_nodes),
+      current_object_(), accesschain_mapping_(*accesschain_mapping),
+      current_function_definition_node_(nullptr) {}
+
+// Visits a symbol node, set the current_object_ to the
+// current node symbol ID, and record a mapping from this node to the current
+// current_object_, which is the just obtained symbol
+// ID.
+void TSymbolDefinitionCollectingTraverser::visitSymbol(glslang::TIntermSymbol* node)
+{
+    current_object_ = generateSymbolLabel(node);
+    accesschain_mapping_[node] = current_object_;
+}
+
+// Visits an aggregate node, traverses all of its children.
+bool TSymbolDefinitionCollectingTraverser::visitAggregate(glslang::TVisit,
+                                                          glslang::TIntermAggregate* node)
+{
+    // This aggregate node might be a function definition node, in which case we need to
+    // cache this node, so we can get the preciseness information of the return value
+    // of this function later.
+    StateSettingGuard<glslang::TIntermAggregate*> current_function_definition_node_setting_guard(
+        &current_function_definition_node_);
+    if (node->getOp() == glslang::EOpFunction) {
+        // This is function definition node, we need to cache this node so that we can
+        // get the preciseness of the return value later.
+        current_function_definition_node_setting_guard.setState(node);
+    }
+    // Traverse the items in the sequence.
+    glslang::TIntermSequence& seq = node->getSequence();
+    for (int i = 0; i < (int)seq.size(); ++i) {
+        current_object_.clear();
+        seq[i]->traverse(this);
+    }
+    return false;
+}
+
+bool TSymbolDefinitionCollectingTraverser::visitBranch(glslang::TVisit,
+                                                       glslang::TIntermBranch* node)
+{
+    if (node->getFlowOp() == glslang::EOpReturn && node->getExpression() &&
+        current_function_definition_node_ &&
+        current_function_definition_node_->getType().getQualifier().noContraction) {
+        // This node is a return node with an expression, and its function has a
+        // precise return value. We need to find the involved objects in its
+        // expression and add them to the set of initial precise objects.
+        precise_return_nodes_.insert(node);
+        node->getExpression()->traverse(this);
+    }
+    return false;
+}
+
+// Visits a unary node. This might be an implicit assignment like i++, i--. etc.
+bool TSymbolDefinitionCollectingTraverser::visitUnary(glslang::TVisit /* visit */,
+                                                      glslang::TIntermUnary* node)
+{
+    current_object_.clear();
+    node->getOperand()->traverse(this);
+    if (isAssignOperation(node->getOp())) {
+        // We should always be able to get an access chain of the operand node.
+        assert(!current_object_.empty());
+
+        // If the operand node object is 'precise', we collect its access chain
+        // for the initial set of 'precise' objects.
+        if (isPreciseObjectNode(node->getOperand())) {
+            // The operand node is an 'precise' object node, add its
+            // access chain to the set of 'precise' objects. This is to collect
+            // the initial set of 'precise' objects.
+            precise_objects_.insert(current_object_);
+        }
+        // Gets the symbol ID from the object's access chain.
+        ObjectAccessChain id_symbol = getFrontElement(current_object_);
+        // Add a mapping from the symbol ID to this assignment operation node.
+        symbol_definition_mapping_.insert(std::make_pair(id_symbol, node));
+    }
+    // A unary node is not a dereference node, so we clear the access chain which
+    // is under construction.
+    current_object_.clear();
+    return false;
+}
+
+// Visits a binary node and updates the mapping from symbol IDs to the definition
+// nodes. Also collects the access chains for the initial precise objects.
+bool TSymbolDefinitionCollectingTraverser::visitBinary(glslang::TVisit /* visit */,
+                                                       glslang::TIntermBinary* node)
+{
+    // Traverses the left node to build the access chain info for the object.
+    current_object_.clear();
+    node->getLeft()->traverse(this);
+
+    if (isAssignOperation(node->getOp())) {
+        // We should always be able to get an access chain for the left node.
+        assert(!current_object_.empty());
+
+        // If the left node object is 'precise', it is an initial precise object
+        // specified in the shader source. Adds it to the initial work list to
+        // process later.
+        if (isPreciseObjectNode(node->getLeft())) {
+            // The left node is an 'precise' object node, add its access chain to
+            // the set of 'precise' objects. This is to collect the initial set
+            // of 'precise' objects.
+            precise_objects_.insert(current_object_);
+        }
+        // Gets the symbol ID from the object access chain, which should be the
+        // first element recorded in the access chain.
+        ObjectAccessChain id_symbol = getFrontElement(current_object_);
+        // Adds a mapping from the symbol ID to this assignment operation node.
+        symbol_definition_mapping_.insert(std::make_pair(id_symbol, node));
+
+        // Traverses the right node, there may be other 'assignment'
+        // operations in the right.
+        current_object_.clear();
+        node->getRight()->traverse(this);
+
+    } else if (isDereferenceOperation(node->getOp())) {
+        // The left node (parent node) is a struct type object. We need to
+        // record the access chain information of the current node into its
+        // object id.
+        if (node->getOp() == glslang::EOpIndexDirectStruct) {
+            unsigned struct_dereference_index = getStructIndexFromConstantUnion(node->getRight());
+            current_object_.push_back(ObjectAccesschainDelimiter);
+            current_object_.append(std::to_string(struct_dereference_index));
+        }
+        accesschain_mapping_[node] = current_object_;
+
+        // For a dereference node, there is no need to traverse the right child
+        // node as the right node should always be an integer type object.
+
+    } else {
+        // For other binary nodes, still traverse the right node.
+        current_object_.clear();
+        node->getRight()->traverse(this);
+    }
+    return false;
+}
+
+// Traverses the AST and returns a tuple of four members:
+// 1) a mapping from symbol IDs to the definition nodes (aka. assignment nodes) of these symbols.
+// 2) a mapping from object nodes in the AST to the access chains of these objects.
+// 3) a set of access chains of precise objects.
+// 4) a set of return nodes with precise expressions.
+std::tuple<NodeMapping, AccessChainMapping, ObjectAccesschainSet, ReturnBranchNodeSet>
+getSymbolToDefinitionMappingAndPreciseSymbolIDs(const glslang::TIntermediate& intermediate)
+{
+    auto result_tuple = std::make_tuple(NodeMapping(), AccessChainMapping(), ObjectAccesschainSet(),
+                                        ReturnBranchNodeSet());
+
+    TIntermNode* root = intermediate.getTreeRoot();
+    if (root == 0)
+        return result_tuple;
+
+    NodeMapping& symbol_definition_mapping = std::get<0>(result_tuple);
+    AccessChainMapping& accesschain_mapping = std::get<1>(result_tuple);
+    ObjectAccesschainSet& precise_objects = std::get<2>(result_tuple);
+    ReturnBranchNodeSet& precise_return_nodes = std::get<3>(result_tuple);
+
+    // Traverses the AST and populate the results.
+    TSymbolDefinitionCollectingTraverser collector(&symbol_definition_mapping, &accesschain_mapping,
+                                                   &precise_objects, &precise_return_nodes);
+    root->traverse(&collector);
+
+    return result_tuple;
+}
+
+//
+// A traverser that determine whether the left node (or operand node for unary
+// node) of an assignment node is 'precise', containing 'precise' or not,
+// according to the access chain a given precise object which share the same
+// symbol as the left node.
+//
+// Post-orderly traverses the left node subtree of an binary assignment node and:
+//
+//  1) Propagates the 'precise' from the left object nodes to this object node.
+//
+//  2) Builds object access chain along the traversal, and also compares with
+//  the access chain of the given 'precise' object along with the traversal to
+//  tell if the node to be defined is 'precise' or not.
+//
+class TNoContractionAssigneeCheckingTraverser : public glslang::TIntermTraverser {
+
+    enum DecisionStatus {
+        // The object node to be assigned to may contain 'precise' objects and also not 'precise' objects.
+        Mixed = 0,
+        // The object node to be assigned to is either a 'precise' object or a struct objects whose members are all 'precise'.
+        Precise = 1,
+        // The object node to be assigned to is not a 'precise' object.
+        NotPreicse = 2,
+    };
+
+public:
+    TNoContractionAssigneeCheckingTraverser(const AccessChainMapping& accesschain_mapping)
+        : TIntermTraverser(true, false, false), accesschain_mapping_(accesschain_mapping),
+          precise_object_(nullptr) {}
+
+    // Checks the preciseness of a given assignment node with a precise object
+    // represented as access chain. The precise object shares the same symbol
+    // with the assignee of the given assignment node. Return a tuple of two:
+    //
+    //  1) The preciseness of the assignee node of this assignment node. True
+    //  if the assignee contains 'precise' objects or is 'precise', false if
+    //  the assignee is not 'precise' according to the access chain of the given
+    //  precise object.
+    //
+    //  2) The incremental access chain from the assignee node to its nested
+    //  'precise' object, according to the access chain of the given precise
+    //  object. This incremental access chain can be empty, which means the
+    //  assignee is 'precise'. Otherwise it shows the path to the nested
+    //  precise object.
+    std::tuple<bool, ObjectAccessChain>
+    getPrecisenessAndRemainedAccessChain(glslang::TIntermOperator* node,
+                                         const ObjectAccessChain& precise_object)
+    {
+        assert(isAssignOperation(node->getOp()));
+        precise_object_ = &precise_object;
+        ObjectAccessChain assignee_object;
+        if (glslang::TIntermBinary* BN = node->getAsBinaryNode()) {
+            // This is a binary assignment node, we need to check the
+            // preciseness of the left node.
+            assert(accesschain_mapping_.count(BN->getLeft()));
+            // The left node (assignee node) is an object node, traverse the
+            // node to let the 'precise' of nesting objects being transfered to
+            // nested objects.
+            BN->getLeft()->traverse(this);
+            // After traversing the left node, if the left node is 'precise',
+            // we can conclude this assignment should propagate 'precise'.
+            if (isPreciseObjectNode(BN->getLeft())) {
+                return make_tuple(true, ObjectAccessChain());
+            }
+            // If the preciseness of the left node (assignee node) can not
+            // be determined by now, we need to compare the access chain string
+            // of the assignee object with the given precise object.
+            assignee_object = accesschain_mapping_.at(BN->getLeft());
+
+        } else if (glslang::TIntermUnary* UN = node->getAsUnaryNode()) {
+            // This is a unary assignment node, we need to check the
+            // preciseness of the operand node. For unary assignment node, the
+            // operand node should always be an object node.
+            assert(accesschain_mapping_.count(UN->getOperand()));
+            // Traverse the operand node to let the 'precise' being propagated
+            // from lower nodes to upper nodes.
+            UN->getOperand()->traverse(this);
+            // After traversing the operand node, if the operand node is
+            // 'precise', this assignment should propagate 'precise'.
+            if (isPreciseObjectNode(UN->getOperand())) {
+                return make_tuple(true, ObjectAccessChain());
+            }
+            // If the preciseness of the operand node (assignee node) can not
+            // be determined by now, we need to compare the access chain string
+            // of the assignee object with the given precise object.
+            assignee_object = accesschain_mapping_.at(UN->getOperand());
+        } else {
+            // Not a binary or unary node, should not happen.
+            assert(false);
+        }
+
+        // Compare the access chain string of the assignee node with the given
+        // precise object to determine if this assignment should propagate
+        // 'precise'.
+        if (assignee_object.find(precise_object) == 0) {
+            // The access chain string of the given precise object is a prefix
+            // of assignee's access chain string. The assignee should be
+            // 'precise'.
+            return make_tuple(true, ObjectAccessChain());
+        } else if (precise_object.find(assignee_object) == 0) {
+            // The assignee's access chain string is a prefix of the given
+            // precise object, the assignee object contains 'precise' object,
+            // and we need to pass the remained access chain to the object nodes
+            // in the right.
+            return make_tuple(true, getSubAccessChainAfterPrefix(precise_object, assignee_object));
+        } else {
+            // The access chain strings do not match, the assignee object can
+            // not be labeled as 'precise' according to the given precise
+            // object.
+            return make_tuple(false, ObjectAccessChain());
+        }
+    }
+
+protected:
+    TNoContractionAssigneeCheckingTraverser& operator=(const TNoContractionAssigneeCheckingTraverser&);
+
+    bool visitBinary(glslang::TVisit, glslang::TIntermBinary* node) override;
+    void visitSymbol(glslang::TIntermSymbol* node) override;
+
+    // A map from object nodes to their access chain string (used as object ID).
+    const AccessChainMapping& accesschain_mapping_;
+    // A given precise object, represented in it access chain string. This
+    // precise object is used to be compared with the assignee node to tell if
+    // the assignee node is 'precise', contains 'precise' object or not
+    // 'precise'.
+    const ObjectAccessChain* precise_object_;
+};
+
+// Visits a binary node. If the node is an object node, it must be a dereference
+// node. In such cases, if the left node is 'precise', this node should also be
+// 'precise'.
+bool TNoContractionAssigneeCheckingTraverser::visitBinary(glslang::TVisit,
+                                                          glslang::TIntermBinary* node)
+{
+    // Traverses the left so that we transfer the 'precise' from nesting object
+    // to its nested object.
+    node->getLeft()->traverse(this);
+    // If this binary node is an object node, we should have it in the
+    // accesschain_mapping_.
+    if (accesschain_mapping_.count(node)) {
+        // A binary object node must be a dereference node.
+        assert(isDereferenceOperation(node->getOp()));
+        // If the left node is 'precise', this node should also be precise,
+        // otherwise, compare with the given precise_object_. If the
+        // access chain of this node matches with the given precise_object_,
+        // this node should be marked as 'precise'.
+        if (isPreciseObjectNode(node->getLeft())) {
+            node->getWritableType().getQualifier().noContraction = true;
+        } else if (accesschain_mapping_.at(node) == *precise_object_) {
+            node->getWritableType().getQualifier().noContraction = true;
+        }
+    }
+    return false;
+}
+
+// Visits a symbol node, if the symbol node ID (its access chain string) matches
+// with the given precise object, this node should be 'precise'.
+void TNoContractionAssigneeCheckingTraverser::visitSymbol(glslang::TIntermSymbol* node)
+{
+    // A symbol node should always be an object node, and should have been added
+    // to the map from object nodes to their access chain strings.
+    assert(accesschain_mapping_.count(node));
+    if (accesschain_mapping_.at(node) == *precise_object_) {
+        node->getWritableType().getQualifier().noContraction = true;
+    }
+}
+
+//
+// A traverser that only traverses the right side of binary assignment nodes
+// and the operand node of unary assignment nodes.
+//
+// 1) Marks arithmetic operations as 'NoContraction'.
+//
+// 2) Find the object which should be marked as 'precise' in the right and
+//    update the 'precise' object work list.
+//
+class TNoContractionPropagator : public glslang::TIntermTraverser {
+public:
+    TNoContractionPropagator(ObjectAccesschainSet* precise_objects,
+                             const AccessChainMapping& accesschain_mapping)
+        : TIntermTraverser(true, false, false),
+          precise_objects_(*precise_objects), added_precise_object_ids_(),
+          remained_accesschain_(), accesschain_mapping_(accesschain_mapping) {}
+
+    // Propagates 'precise' in the right nodes of a given assignment node with
+    // access chain record from the assignee node to a 'precise' object it
+    // contains.
+    void
+    propagateNoContractionInOneExpression(glslang::TIntermTyped* defining_node,
+                                          const ObjectAccessChain& assignee_remained_accesschain)
+    {
+        remained_accesschain_ = assignee_remained_accesschain;
+        if (glslang::TIntermBinary* BN = defining_node->getAsBinaryNode()) {
+            assert(isAssignOperation(BN->getOp()));
+            BN->getRight()->traverse(this);
+            if (isArithmeticOperation(BN->getOp())) {
+                BN->getWritableType().getQualifier().noContraction = true;
+            }
+        } else if (glslang::TIntermUnary* UN = defining_node->getAsUnaryNode()) {
+            assert(isAssignOperation(UN->getOp()));
+            UN->getOperand()->traverse(this);
+            if (isArithmeticOperation(UN->getOp())) {
+                UN->getWritableType().getQualifier().noContraction = true;
+            }
+        }
+    }
+
+    // Propagates 'precise' in a given precise return node.
+    void propagateNoContractionInReturnNode(glslang::TIntermBranch* return_node)
+    {
+        remained_accesschain_ = "";
+        assert(return_node->getFlowOp() == glslang::EOpReturn && return_node->getExpression());
+        return_node->getExpression()->traverse(this);
+    }
+
+protected:
+    TNoContractionPropagator& operator=(const TNoContractionPropagator&);
+
+    // Visits an aggregate node. The node can be a initializer list, in which
+    // case we need to find the 'precise' or 'precise' containing object node
+    // with the access chain record. In other cases, just need to traverse all
+    // the children nodes.
+    bool visitAggregate(glslang::TVisit, glslang::TIntermAggregate* node) override
+    {
+        if (!remained_accesschain_.empty() && node->getOp() == glslang::EOpConstructStruct) {
+            // This is a struct initializer node, and the remained
+            // access chain is not empty, we need to refer to the
+            // assignee_remained_access_chain_ to find the nested
+            // 'precise' object. And we don't need to visit other nodes in this
+            // aggregate node.
+
+            // Gets the struct dereference index that leads to 'precise' object.
+            ObjectAccessChain precise_accesschain_index_str =
+                getFrontElement(remained_accesschain_);
+            unsigned precise_accesschain_index = (unsigned)strtoul(precise_accesschain_index_str.c_str(), nullptr, 10);
+            // Gets the node pointed by the access chain index extracted before.
+            glslang::TIntermTyped* potential_precise_node =
+                node->getSequence()[precise_accesschain_index]->getAsTyped();
+            assert(potential_precise_node);
+            // Pop the front access chain index from the path, and visit the nested node.
+            {
+                ObjectAccessChain next_level_accesschain =
+                    subAccessChainFromSecondElement(remained_accesschain_);
+                StateSettingGuard<ObjectAccessChain> setup_remained_accesschain_for_next_level(
+                    &remained_accesschain_, next_level_accesschain);
+                potential_precise_node->traverse(this);
+            }
+            return false;
+        }
+        return true;
+    }
+
+    // Visits a binary node. A binary node can be an object node, e.g. a dereference node.
+    // As only the top object nodes in the right side of an assignment needs to be visited
+    // and added to 'precise' work list, this traverser won't visit the children nodes of
+    // an object node. If the binary node does not represent an object node, it should
+    // go on to traverse its children nodes and if it is an arithmetic operation node, this
+    // operation should be marked as 'noContraction'.
+    bool visitBinary(glslang::TVisit, glslang::TIntermBinary* node) override
+    {
+        if (isDereferenceOperation(node->getOp())) {
+            // This binary node is an object node. Need to update the precise
+            // object set with the access chain of this node + remained
+            // access chain .
+            ObjectAccessChain new_precise_accesschain = accesschain_mapping_.at(node);
+            if (remained_accesschain_.empty()) {
+                node->getWritableType().getQualifier().noContraction = true;
+            } else {
+                new_precise_accesschain += ObjectAccesschainDelimiter + remained_accesschain_;
+            }
+            // Cache the access chain as added precise object, so we won't add the
+            // same object to the work list again.
+            if (!added_precise_object_ids_.count(new_precise_accesschain)) {
+                precise_objects_.insert(new_precise_accesschain);
+                added_precise_object_ids_.insert(new_precise_accesschain);
+            }
+            // Only the upper-most object nodes should be visited, so do not
+            // visit children of this object node.
+            return false;
+        }
+        // If this is an arithmetic operation, marks this node as 'noContraction'.
+        if (isArithmeticOperation(node->getOp()) && node->getBasicType() != glslang::EbtInt) {
+            node->getWritableType().getQualifier().noContraction = true;
+        }
+        // As this node is not an object node, need to traverse the children nodes.
+        return true;
+    }
+
+    // Visits a unary node. A unary node can not be an object node. If the operation
+    // is an arithmetic operation, need to mark this node as 'noContraction'.
+    bool visitUnary(glslang::TVisit /* visit */, glslang::TIntermUnary* node) override
+    {
+        // If this is an arithmetic operation, marks this with 'noContraction'
+        if (isArithmeticOperation(node->getOp())) {
+            node->getWritableType().getQualifier().noContraction = true;
+        }
+        return true;
+    }
+
+    // Visits a symbol node. A symbol node is always an object node. So we
+    // should always be able to find its in our collected mapping from object
+    // nodes to access chains.  As an object node, a symbol node can be either
+    // 'precise' or containing 'precise' objects according to unused
+    // access chain information we have when we visit this node.
+    void visitSymbol(glslang::TIntermSymbol* node) override
+    {
+        // Symbol nodes are object nodes and should always have an
+        // access chain collected before matches with it.
+        assert(accesschain_mapping_.count(node));
+        ObjectAccessChain new_precise_accesschain = accesschain_mapping_.at(node);
+        // If the unused access chain is empty, this symbol node should be
+        // marked as 'precise'.  Otherwise, the unused access chain should be
+        // appended to the symbol ID to build a new access chain which points to
+        // the nested 'precise' object in this symbol object.
+        if (remained_accesschain_.empty()) {
+            node->getWritableType().getQualifier().noContraction = true;
+        } else {
+            new_precise_accesschain += ObjectAccesschainDelimiter + remained_accesschain_;
+        }
+        // Add the new 'precise' access chain to the work list and make sure we
+        // don't visit it again.
+        if (!added_precise_object_ids_.count(new_precise_accesschain)) {
+            precise_objects_.insert(new_precise_accesschain);
+            added_precise_object_ids_.insert(new_precise_accesschain);
+        }
+    }
+
+    // A set of precise objects, represented as access chains.
+    ObjectAccesschainSet& precise_objects_;
+    // Visited symbol nodes, should not revisit these nodes.
+    ObjectAccesschainSet added_precise_object_ids_;
+    // The left node of an assignment operation might be an parent of 'precise' objects.
+    // This means the left node might not be an 'precise' object node, but it may contains
+    // 'precise' qualifier which should be propagated to the corresponding child node in
+    // the right. So we need the path from the left node to its nested 'precise' node to
+    // tell us how to find the corresponding 'precise' node in the right.
+    ObjectAccessChain remained_accesschain_;
+    // A map from node pointers to their access chains.
+    const AccessChainMapping& accesschain_mapping_;
+};
+}
+
+namespace glslang {
+
+void PropagateNoContraction(const glslang::TIntermediate& intermediate)
+{
+    // First, traverses the AST, records symbols with their defining operations
+    // and collects the initial set of precise symbols (symbol nodes that marked
+    // as 'noContraction') and precise return nodes.
+    auto mappings_and_precise_objects =
+        getSymbolToDefinitionMappingAndPreciseSymbolIDs(intermediate);
+
+    // The mapping of symbol node IDs to their defining nodes. This enables us
+    // to get the defining node directly from a given symbol ID without
+    // traversing the tree again.
+    NodeMapping& symbol_definition_mapping = std::get<0>(mappings_and_precise_objects);
+
+    // The mapping of object nodes to their access chains recorded.
+    AccessChainMapping& accesschain_mapping = std::get<1>(mappings_and_precise_objects);
+
+    // The initial set of 'precise' objects which are represented as the
+    // access chain toward them.
+    ObjectAccesschainSet& precise_object_accesschains = std::get<2>(mappings_and_precise_objects);
+
+    // The set of 'precise' return nodes.
+    ReturnBranchNodeSet& precise_return_nodes = std::get<3>(mappings_and_precise_objects);
+
+    // Second, uses the initial set of precise objects as a work list, pops an
+    // access chain, extract the symbol ID from it. Then:
+    //  1) Check the assignee object, see if it is 'precise' object node or
+    //  contains 'precise' object. Obtain the incremental access chain from the
+    //  assignee node to its nested 'precise' node (if any).
+    //  2) If the assignee object node is 'precise' or it contains 'precise'
+    //  objects, traverses the right side of the assignment operation
+    //  expression to mark arithmetic operations as 'noContration' and update
+    //  'precise' access chain work list with new found object nodes.
+    // Repeat above steps until the work list is empty.
+    TNoContractionAssigneeCheckingTraverser checker(accesschain_mapping);
+    TNoContractionPropagator propagator(&precise_object_accesschains, accesschain_mapping);
+
+    // We have two initial precise work lists to handle:
+    //  1) precise return nodes
+    //  2) precise object access chains
+    // We should process the precise return nodes first and the involved
+    // objects in the return expression should be added to the precise object
+    // access chain set.
+    while (!precise_return_nodes.empty()) {
+        glslang::TIntermBranch* precise_return_node = *precise_return_nodes.begin();
+        propagator.propagateNoContractionInReturnNode(precise_return_node);
+        precise_return_nodes.erase(precise_return_node);
+    }
+
+    while (!precise_object_accesschains.empty()) {
+        // Get the access chain of a precise object from the work list.
+        ObjectAccessChain precise_object_accesschain = *precise_object_accesschains.begin();
+        // Get the symbol id from the access chain.
+        ObjectAccessChain symbol_id = getFrontElement(precise_object_accesschain);
+        // Get all the defining nodes of that symbol ID.
+        std::pair<NodeMapping::iterator, NodeMapping::iterator> range =
+            symbol_definition_mapping.equal_range(symbol_id);
+        // Visits all the assignment nodes of that symbol ID and
+        //  1) Check if the assignee node is 'precise' or contains 'precise'
+        //  objects.
+        //  2) Propagate the 'precise' to the top layer object nodes
+        //  in the right side of the assignment operation, update the 'precise'
+        //  work list with new access chains representing the new 'precise'
+        //  objects, and mark arithmetic operations as 'noContraction'.
+        for (NodeMapping::iterator defining_node_iter = range.first;
+             defining_node_iter != range.second; defining_node_iter++) {
+            TIntermOperator* defining_node = defining_node_iter->second;
+            // Check the assignee node.
+            auto checker_result = checker.getPrecisenessAndRemainedAccessChain(
+                defining_node, precise_object_accesschain);
+            bool& contain_precise = std::get<0>(checker_result);
+            ObjectAccessChain& remained_accesschain = std::get<1>(checker_result);
+            // If the assignee node is 'precise' or contains 'precise', propagate the
+            // 'precise' to the right. Otherwise just skip this assignment node.
+            if (contain_precise) {
+                propagator.propagateNoContractionInOneExpression(defining_node,
+                                                                 remained_accesschain);
+            }
+        }
+        // Remove the last processed 'precise' object from the work list.
+        precise_object_accesschains.erase(precise_object_accesschain);
+    }
+}
+};
+
+#endif // GLSLANG_WEB

dep/glslang/glslang/MachineIndependent/propagateNoContraction.h

@@ -0,0 +1,55 @@
+//
+// Copyright (C) 2015-2016 Google, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of Google Inc. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+
+//
+// Visit the nodes in the glslang intermediate tree representation to
+// propagate 'noContraction' qualifier.
+//
+
+#pragma once
+
+#include "../Include/intermediate.h"
+
+namespace glslang {
+
+// Propagates the 'precise' qualifier for objects (objects marked with
+// 'noContraction' qualifier) from the shader source specified 'precise'
+// variables to all the involved objects, and add 'noContraction' qualifier for
+// the involved arithmetic operations.
+// Note that the same qualifier: 'noContraction' is used in both object nodes
+// and arithmetic operation nodes, but has different meaning. For object nodes,
+// 'noContraction' means the object is 'precise'; and for arithmetic operation
+// nodes, it means the operation should not be contracted.
+void PropagateNoContraction(const glslang::TIntermediate& intermediate);
+};

dep/glslang/glslang/MachineIndependent/reflection.h

@@ -0,0 +1,223 @@
+//
+// Copyright (C) 2013-2016 LunarG, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+#ifndef GLSLANG_WEB
+
+#ifndef _REFLECTION_INCLUDED
+#define _REFLECTION_INCLUDED
+
+#include "../Public/ShaderLang.h"
+#include "../Include/Types.h"
+
+#include <list>
+#include <set>
+
+//
+// A reflection database and its interface, consistent with the OpenGL API reflection queries.
+//
+
+namespace glslang {
+
+class TIntermediate;
+class TIntermAggregate;
+class TReflectionTraverser;
+
+// The full reflection database
+class TReflection {
+public:
+    TReflection(EShReflectionOptions opts, EShLanguage first, EShLanguage last)
+        : options(opts), firstStage(first), lastStage(last), badReflection(TObjectReflection::badReflection())
+    { 
+        for (int dim=0; dim<3; ++dim)
+            localSize[dim] = 0;
+    }
+
+    virtual ~TReflection() {}
+
+    // grow the reflection stage by stage
+    bool addStage(EShLanguage, const TIntermediate&);
+
+    // for mapping a uniform index to a uniform object's description
+    int getNumUniforms() { return (int)indexToUniform.size(); }
+    const TObjectReflection& getUniform(int i) const
+    {
+        if (i >= 0 && i < (int)indexToUniform.size())
+            return indexToUniform[i];
+        else
+            return badReflection;
+    }
+
+    // for mapping a block index to the block's description
+    int getNumUniformBlocks() const { return (int)indexToUniformBlock.size(); }
+    const TObjectReflection& getUniformBlock(int i) const
+    {
+        if (i >= 0 && i < (int)indexToUniformBlock.size())
+            return indexToUniformBlock[i];
+        else
+            return badReflection;
+    }
+
+    // for mapping an pipeline input index to the input's description
+    int getNumPipeInputs() { return (int)indexToPipeInput.size(); }
+    const TObjectReflection& getPipeInput(int i) const
+    {
+        if (i >= 0 && i < (int)indexToPipeInput.size())
+            return indexToPipeInput[i];
+        else
+            return badReflection;
+    }
+
+    // for mapping an pipeline output index to the output's description
+    int getNumPipeOutputs() { return (int)indexToPipeOutput.size(); }
+    const TObjectReflection& getPipeOutput(int i) const
+    {
+        if (i >= 0 && i < (int)indexToPipeOutput.size())
+            return indexToPipeOutput[i];
+        else
+            return badReflection;
+    }
+
+    // for mapping from an atomic counter to the uniform index
+    int getNumAtomicCounters() const { return (int)atomicCounterUniformIndices.size(); }
+    const TObjectReflection& getAtomicCounter(int i) const
+    {
+        if (i >= 0 && i < (int)atomicCounterUniformIndices.size())
+            return getUniform(atomicCounterUniformIndices[i]);
+        else
+            return badReflection;
+    }
+
+    // for mapping a buffer variable index to a buffer variable object's description
+    int getNumBufferVariables() { return (int)indexToBufferVariable.size(); }
+    const TObjectReflection& getBufferVariable(int i) const
+    {
+        if (i >= 0 && i < (int)indexToBufferVariable.size())
+            return indexToBufferVariable[i];
+        else
+            return badReflection;
+    }
+    
+    // for mapping a storage block index to the storage block's description
+    int getNumStorageBuffers() const { return (int)indexToBufferBlock.size(); }
+    const TObjectReflection&  getStorageBufferBlock(int i) const
+    {
+        if (i >= 0 && i < (int)indexToBufferBlock.size())
+            return indexToBufferBlock[i];
+        else
+            return badReflection;
+    }
+
+    // for mapping any name to its index (block names, uniform names and input/output names)
+    int getIndex(const char* name) const
+    {
+        TNameToIndex::const_iterator it = nameToIndex.find(name);
+        if (it == nameToIndex.end())
+            return -1;
+        else
+            return it->second;
+    }
+
+    // see getIndex(const char*)
+    int getIndex(const TString& name) const { return getIndex(name.c_str()); }
+
+
+    // for mapping any name to its index (only pipe input/output names)
+    int getPipeIOIndex(const char* name, const bool inOrOut) const
+    {
+        TNameToIndex::const_iterator it = inOrOut ? pipeInNameToIndex.find(name) : pipeOutNameToIndex.find(name);
+        if (it == (inOrOut ? pipeInNameToIndex.end() : pipeOutNameToIndex.end()))
+            return -1;
+        else
+            return it->second;
+    }
+
+    // see gePipeIOIndex(const char*, const bool)
+    int getPipeIOIndex(const TString& name, const bool inOrOut) const { return getPipeIOIndex(name.c_str(), inOrOut); }
+
+    // Thread local size
+    unsigned getLocalSize(int dim) const { return dim <= 2 ? localSize[dim] : 0; }
+
+    void dump();
+
+protected:
+    friend class glslang::TReflectionTraverser;
+
+    void buildCounterIndices(const TIntermediate&);
+    void buildUniformStageMask(const TIntermediate& intermediate);
+    void buildAttributeReflection(EShLanguage, const TIntermediate&);
+
+    // Need a TString hash: typedef std::unordered_map<TString, int> TNameToIndex;
+    typedef std::map<std::string, int> TNameToIndex;
+    typedef std::vector<TObjectReflection> TMapIndexToReflection;
+    typedef std::vector<int> TIndices;
+
+    TMapIndexToReflection& GetBlockMapForStorage(TStorageQualifier storage)
+    {
+        if ((options & EShReflectionSeparateBuffers) && storage == EvqBuffer)
+            return indexToBufferBlock;
+        return indexToUniformBlock;
+    }
+    TMapIndexToReflection& GetVariableMapForStorage(TStorageQualifier storage)
+    {
+        if ((options & EShReflectionSeparateBuffers) && storage == EvqBuffer)
+            return indexToBufferVariable;
+        return indexToUniform;
+    }
+
+    EShReflectionOptions options;
+
+    EShLanguage firstStage;
+    EShLanguage lastStage;
+
+    TObjectReflection badReflection; // return for queries of -1 or generally out of range; has expected descriptions with in it for this
+    TNameToIndex nameToIndex;        // maps names to indexes; can hold all types of data: uniform/buffer and which function names have been processed
+    TNameToIndex pipeInNameToIndex;  // maps pipe in names to indexes, this is a fix to seperate pipe I/O from uniforms and buffers.
+    TNameToIndex pipeOutNameToIndex; // maps pipe out names to indexes, this is a fix to seperate pipe I/O from uniforms and buffers.
+    TMapIndexToReflection indexToUniform;
+    TMapIndexToReflection indexToUniformBlock;
+    TMapIndexToReflection indexToBufferVariable;
+    TMapIndexToReflection indexToBufferBlock;
+    TMapIndexToReflection indexToPipeInput;
+    TMapIndexToReflection indexToPipeOutput;
+    TIndices atomicCounterUniformIndices;
+
+    unsigned int localSize[3];
+};
+
+} // end namespace glslang
+
+#endif // _REFLECTION_INCLUDED
+
+#endif // GLSLANG_WEB