kc3-lang/angle/src/compiler/translator/ReplaceVariable.cpp

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• Hash : cf180fcc
  Author :
  Date : 2018-01-04T16:25:40
  

  Keep TIntermSymbol data consistent in DeferGlobalInitializers
  
  BUG=angleproject:2267
  TEST=angle_unittests
  
  Change-Id: I25bd8baded9c13e75555578e4b61b99a56e0c702
  Reviewed-on: https://chromium-review.googlesource.com/850974
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  

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• src/compiler/translator/ReplaceVariable.cpp

• //
  // Copyright (c) 2018 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // ReplaceVariable.cpp: Replace all references to a specific variable in the AST with references to
  // another variable.
  
  #include "compiler/translator/ReplaceVariable.h"
  
  #include "compiler/translator/IntermNode.h"
  #include "compiler/translator/IntermTraverse.h"
  
  namespace sh
  {
  
  namespace
  {
  
  class ReplaceVariableTraverser : public TIntermTraverser
  {
    public:
      ReplaceVariableTraverser(const TVariable *toBeReplaced, const TVariable *replacement)
          : TIntermTraverser(true, false, false),
            mToBeReplaced(toBeReplaced),
            mReplacement(replacement)
      {
      }
  
      void visitSymbol(TIntermSymbol *node) override
      {
          if (&node->variable() == mToBeReplaced)
          {
              queueReplacement(new TIntermSymbol(mReplacement), OriginalNode::IS_DROPPED);
          }
      }
  
    private:
      const TVariable *const mToBeReplaced;
      const TVariable *const mReplacement;
  };
  
  }  // anonymous namespace
  
  // Replaces every occurrence of a variable with another variable.
  void ReplaceVariable(TIntermBlock *root,
                       const TVariable *toBeReplaced,
                       const TVariable *replacement)
  {
      ReplaceVariableTraverser traverser(toBeReplaced, replacement);
      root->traverse(&traverser);
      traverser.updateTree();
  }
  
  }  // namespace sh
  

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