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

Branch : - branch - main - tag -

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  Commit

• Author : Geoff Lang
  Date : 2013-08-29 13:46:49
  Hash : 17732823
  Message : Moved the compiler source files into directories based on their project and added a compiler.gypi to generate the compiler projects.

• src/compiler/translator/ForLoopUnroll.h

• //
  // Copyright (c) 2011 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/intermediate.h"
  
  struct TLoopIndexInfo {
      int id;
      int initValue;
      int stopValue;
      int incrementValue;
      TOperator op;
      int currentValue;
  };
  
  class ForLoopUnroll {
  public:
      ForLoopUnroll() { }
  
      void FillLoopIndexInfo(TIntermLoop* node, TLoopIndexInfo& info);
  
      // Update the info.currentValue for the next loop iteration.
      void Step();
  
      // Return false if loop condition is no longer satisfied.
      bool SatisfiesLoopCondition();
  
      // Check if the symbol is the index of a loop that's unrolled.
      bool NeedsToReplaceSymbolWithValue(TIntermSymbol* symbol);
  
      // Return the current value of a given loop index symbol.
      int GetLoopIndexValue(TIntermSymbol* symbol);
  
      void Push(TLoopIndexInfo& info);
      void Pop();
  
      static void MarkForLoopsWithIntegerIndicesForUnrolling(TIntermNode* root);
  
  private:
      int getLoopIncrement(TIntermLoop* node);
  
      int evaluateIntConstant(TIntermConstantUnion* node);
  
      TVector<TLoopIndexInfo> mLoopIndexStack;
  };