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

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• Hash : 2cd7a0ed
  Author :
  Date : 2015-02-27T13:57:32
  

  Remove switch fall-through on HLSL
  
  Remove fall-through from non-empty labels in switch statements.
  
  Tested with dEQP-GLES3.functional.shaders.*switch*. All pass except for tests
  that require dFdx/dFdy, which fail for an unrelated reason.
  
  Additional test coverage could still be useful for cases where a label is
  terminated by a continue or return statement.
  
  BUG=angle:921
  
  Change-Id: I4741867789a9308d66d0adeabdaf83907106e2d2
  Reviewed-on: https://chromium-review.googlesource.com/254550
  Tested-by: Olli Etuaho <oetuaho@nvidia.com>
  Reviewed-by: Zhenyao Mo <zmo@chromium.org>
  

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• src/compiler/translator/RemoveSwitchFallThrough.h

• //
  // Copyright (c) 2002-2015 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.
  //
  
  #ifndef COMPILER_TRANSLATOR_REMOVESWITCHFALLTHROUGH_H_
  #define COMPILER_TRANSLATOR_REMOVESWITCHFALLTHROUGH_H_
  
  #include "compiler/translator/IntermNode.h"
  
  class RemoveSwitchFallThrough : public TIntermTraverser
  {
    public:
      // When given a statementList from a switch AST node, return an updated
      // statementList that has fall-through removed.
      static TIntermAggregate *removeFallThrough(TIntermAggregate *statementList);
  
    private:
      RemoveSwitchFallThrough(TIntermAggregate *statementList);
  
      void visitSymbol(TIntermSymbol *node) override;
      void visitConstantUnion(TIntermConstantUnion *node) override;
      bool visitBinary(Visit, TIntermBinary *node) override;
      bool visitUnary(Visit, TIntermUnary *node) override;
      bool visitSelection(Visit visit, TIntermSelection *node) override;
      bool visitSwitch(Visit, TIntermSwitch *node) override;
      bool visitCase(Visit, TIntermCase *node) override;
      bool visitAggregate(Visit, TIntermAggregate *node) override;
      bool visitLoop(Visit, TIntermLoop *node) override;
      bool visitBranch(Visit, TIntermBranch *node) override;
  
      void outputSequence(TIntermSequence *sequence, size_t startIndex);
      void handlePreviousCase();
  
      TIntermAggregate *mStatementList;
      TIntermAggregate *mStatementListOut;
      bool mLastStatementWasBreak;
      TIntermAggregate *mPreviousCase;
      std::vector<TIntermAggregate *> mCasesSharingBreak;
  };
  
  #endif // COMPILER_TRANSLATOR_REMOVESWITCHFALLTHROUGH_H_
  

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