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

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• Author : Geoff Lang
  Date : 2014-11-19 16:18:08
  Hash : 0a73dd85
  Message : Fix include guards. BUG=angle:733 Change-Id: I08b2c11c4831f1161c178c1842b10e807185aced Reviewed-on: https://chromium-review.googlesource.com/230831 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>

• 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 COMPILER_TRANSLATOR_NODESEARCH_H_
  #define COMPILER_TRANSLATOR_NODESEARCH_H_
  
  #include "compiler/translator/IntermNode.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 // COMPILER_TRANSLATOR_NODESEARCH_H_