kc3-lang/angle/src/compiler/translator/NodeSearch.h

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• Hash : 3c9eeb97
  Author :
  Date : 2013-11-04T11:09:26
  

  Disable optimizations for shaders with conditional discard in D3D9, and
  only use expanded short-circuiting conditionals for expressions with
  potential side-effects.
  
  Conservatively assume aggreate and selection operators have side effects for now.
  
  BUG=
  ANGLEBUG=486
  R=geofflang@chromium.org, kbr@chromium.org, nicolas@transgaming.com, shannonwoods@chromium.org
  
  Review URL: https://codereview.appspot.com/14441075
  
  Conflicts:
  	src/common/version.h
  	src/compiler/translator.vcxproj
  	src/compiler/translator.vcxproj.filters
  	src/compiler/translator/OutputHLSL.cpp
  	src/libGLESv2/ProgramBinary.cpp
  	src/libGLESv2/Shader.cpp
  	src/libGLESv2/Shader.h
  
  Change-Id: Iaf9f10b5de7b33c927ef032f3c4fe9d5095f64dd
  

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• src/compiler/translator/NodeSearch.h

• //
  // Copyright (c) 2002-2013 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.
  //
  // NodeSearch.h: Utilities for searching translator node graphs
  //
  
  #ifndef TRANSLATOR_NODESEARCH_H_
  #define TRANSLATOR_NODESEARCH_H_
  
  namespace sh
  {
  
  template <class Parent>
  class NodeSearchTraverser : public TIntermTraverser
  {
    public:
      NodeSearchTraverser()
          : mFound(false)
      {}
  
      bool found() const { return mFound; }
  
      static bool search(TIntermNode *node)
      {
          Parent searchTraverser;
          node->traverse(&searchTraverser);
          return searchTraverser.found();
      }
  
    protected:
      bool mFound;
  };
  
  class FindDiscard : public NodeSearchTraverser<FindDiscard>
  {
    public:
      virtual bool visitBranch(Visit visit, TIntermBranch *node)
      {
          switch (node->getFlowOp())
          {
            case EOpKill:
              mFound = true;
              break;
  
            default: break;
          }
  
          return !mFound;
      }
  };
  
  class FindSideEffectRewriting : public NodeSearchTraverser<FindSideEffectRewriting>
  {
    public:
      virtual bool visitBinary(Visit visit, TIntermBinary *node)
      {
          switch (node->getOp())
          {
            case EOpLogicalOr:
            case EOpLogicalAnd:
              if (node->getRight()->hasSideEffects())
              {
                  mFound = true;
              }
              break;
  
            default: break;
          }
  
          return !mFound;
      }
  };
  
  }
  
  #endif // TRANSLATOR_NODESEARCH_H_
  

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