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

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• Hash : bf4e1b73
  Author :
  Date : 2016-12-09T11:30:15
  

  Split TIntermInvariantDeclaration from TIntermAggregate
  
  This change is pure refactoring and doesn't fix bugs related to
  invariant declarations. Invariant declarations are supposed to accept
  a list of identifiers, but this refactoring keeps the current behavior
  of only accepting a single identifier in an invariant declaration.
  When the bug will be fixed, the new TIntermInvariantDeclaration class
  that now has only a single child node can be changed so that it may
  have multiple children.
  
  TIntermAggregate is still used for function calls, function
  prototypes and function parameter lists.
  
  BUG=angleproject:1490
  TEST=angle_unittests
  
  Change-Id: I3e22092c87e1c06445fd7e123d9922c2fcb59428
  Reviewed-on: https://chromium-review.googlesource.com/419415
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  

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• src/compiler/translator/RemoveInvariantDeclaration.cpp

• //
  // Copyright (c) 2016 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.
  //
  
  #include "compiler/translator/RemoveInvariantDeclaration.h"
  
  #include "compiler/translator/IntermNode.h"
  
  namespace sh
  {
  
  namespace
  {
  
  // An AST traverser that removes invariant declaration for input in fragment shader
  // when GLSL >= 4.20 and for output in vertex shader when GLSL < 4.2.
  class RemoveInvariantDeclarationTraverser : public TIntermTraverser
  {
    public:
      RemoveInvariantDeclarationTraverser() : TIntermTraverser(true, false, false) {}
  
    private:
      bool visitInvariantDeclaration(Visit visit, TIntermInvariantDeclaration *node) override
      {
          TIntermSequence emptyReplacement;
          mMultiReplacements.push_back(
              NodeReplaceWithMultipleEntry(getParentNode()->getAsBlock(), node, emptyReplacement));
          return false;
      }
  };
  
  }  // anonymous namespace
  
  void RemoveInvariantDeclaration(TIntermNode *root)
  {
      RemoveInvariantDeclarationTraverser traverser;
      root->traverse(&traverser);
      traverser.updateTree();
  }
  
  }  // namespace sh
  

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