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

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• Author : Corentin Wallez
  Date : 2016-11-23 13:44:05
  Hash : 1212bcac
  Message : translator: separate declarations after rewriting loops Otherwise when trying to add the declarations back, things might fail because the loop initialization is a sequence and not a block. BUG=668028 Change-Id: I8d84a25c25765e9655c16ce56604ae08f0f8176c Reviewed-on: https://chromium-review.googlesource.com/414305 Commit-Queue: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>

• src/compiler/translator/IntermNodePatternMatcher.h

• //
  // 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.
  //
  // IntermNodePatternMatcher is a helper class for matching node trees to given patterns.
  // It can be used whenever the same checks for certain node structures are common to multiple AST
  // traversers.
  //
  
  #ifndef COMPILER_TRANSLATOR_INTERMNODEPATTERNMATCHER_H_
  #define COMPILER_TRANSLATOR_INTERMNODEPATTERNMATCHER_H_
  
  namespace sh
  {
  
  class TIntermAggregate;
  class TIntermBinary;
  class TIntermNode;
  class TIntermTernary;
  class TIntermDeclaration;
  
  class IntermNodePatternMatcher
  {
    public:
      static bool IsDynamicIndexingOfVectorOrMatrix(TIntermBinary *node);
  
      enum PatternType
      {
          // Matches expressions that are unfolded to if statements by UnfoldShortCircuitToIf
          kUnfoldedShortCircuitExpression = 0x0001,
  
          // Matches expressions that return arrays with the exception of simple statements where a
          // constructor or function call result is assigned.
          kExpressionReturningArray = 0x0002,
  
          // Matches dynamic indexing of vectors or matrices in l-values.
          kDynamicIndexingOfVectorOrMatrixInLValue = 0x0004,
  
          // Matches declarations with more than one declared variables
          kMultiDeclaration = 0x0008,
      };
      IntermNodePatternMatcher(const unsigned int mask);
  
      bool match(TIntermBinary *node, TIntermNode *parentNode);
  
      // Use this version for checking binary node matches in case you're using flag
      // kDynamicIndexingOfVectorOrMatrixInLValue.
      bool match(TIntermBinary *node, TIntermNode *parentNode, bool isLValueRequiredHere);
  
      bool match(TIntermAggregate *node, TIntermNode *parentNode);
      bool match(TIntermTernary *node);
      bool match(TIntermDeclaration *node);
  
    private:
      const unsigned int mMask;
  
      bool matchInternal(TIntermBinary *node, TIntermNode *parentNode);
  };
  
  }  // namespace sh
  
  #endif