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

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• Author : Olli Etuaho
  Date : 2016-07-14 11:55:48
  Hash : 3cbb27a1
  Message : Simplify loop conditions so that they won't generate statements Introduce an AST traverser that can move the evaluation of certain types of loop conditions and loop expressions inside the loop. This way subsequent AST transformations don't have to worry about cases where they have to insert new statements to implement a loop condition or expression. This includes the revert of "Unfold short-circuiting operators in loop conditions correctly". The new traverser covers the loop cases that used to be handled in UnfoldShortCircuitToIf. BUG=angleproject:1465 TEST=WebGL conformance tests, dEQP-GLES2.functional.shaders.*select_iteration_count* Change-Id: I88e50e007e924d5884a217117690ac7fa2f96d38 Reviewed-on: https://chromium-review.googlesource.com/362570 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

• src/compiler/translator/SimplifyLoopConditions.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.
  //
  // SimplifyLoopConditions is an AST traverser that converts loop conditions and loop expressions
  // to regular statements inside the loop. This way further transformations that generate statements
  // from loop conditions and loop expressions work correctly.
  //
  
  #ifndef COMPILER_TRANSLATOR_SIMPLIFYLOOPCONDITIONS_H_
  #define COMPILER_TRANSLATOR_SIMPLIFYLOOPCONDITIONS_H_
  
  class TIntermNode;
  class TSymbolTable;
  
  void SimplifyLoopConditions(TIntermNode *root,
                              unsigned int conditionsToSimplify,
                              unsigned int *temporaryIndex,
                              const TSymbolTable &symbolTable,
                              int shaderVersion);
  
  #endif  // COMPILER_TRANSLATOR_SIMPLIFYLOOPCONDITIONS_H_