kc3-lang/angle/src/compiler/translator/tree_ops/apple/AddAndTrueToLoopCondition.cpp

• Show log

  Commit

• Hash : b8d6f8aa
  Author :
  Date : 2021-07-22T22:31:29
  

  Translator: Facilitate integration in FireFox
  
  Instead of relying on is_apple to build workarounds applied on apple
  hardware, a new build argument is added for this purpose.  This allows
  FireFox to more easily include these files in their build system (which
  builds every workaround on every platform).
  
  The workarounds are reorganized too and moved from tree_ops/gl/mac to
  tree_ops/apple.  RewriteRowMajorMatrices is moved there too as it's now
  used by both gl and metal.  This workaround is large, and removing it
  from non-apple builds improves binary size (~40KB on Linux).
  
  Bug: angleproject:6188
  Change-Id: I8e1dab44d0235bb6b8341d53721bdd0d157d46c6
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3047385
  Reviewed-by: Jeff Gilbert <jgilbert@mozilla.com>
  Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  

Download

• src/compiler/translator/tree_ops/apple/AddAndTrueToLoopCondition.cpp

• //
  // Copyright 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.
  //
  
  #include "compiler/translator/tree_ops/apple/AddAndTrueToLoopCondition.h"
  
  #include "compiler/translator/Compiler.h"
  #include "compiler/translator/tree_util/IntermNode_util.h"
  #include "compiler/translator/tree_util/IntermTraverse.h"
  
  namespace sh
  {
  
  namespace
  {
  
  // An AST traverser that rewrites for and while loops by replacing "condition" with
  // "condition && true" to work around condition bug on Intel Mac.
  class AddAndTrueToLoopConditionTraverser : public TIntermTraverser
  {
    public:
      AddAndTrueToLoopConditionTraverser() : TIntermTraverser(true, false, false) {}
  
      bool visitLoop(Visit, TIntermLoop *loop) override
      {
          // do-while loop doesn't have this bug.
          if (loop->getType() != ELoopFor && loop->getType() != ELoopWhile)
          {
              return true;
          }
  
          // For loop may not have a condition.
          if (loop->getCondition() == nullptr)
          {
              return true;
          }
  
          // Constant true.
          TIntermTyped *trueValue = CreateBoolNode(true);
  
          // CONDITION && true.
          TIntermBinary *andOp = new TIntermBinary(EOpLogicalAnd, loop->getCondition(), trueValue);
          loop->setCondition(andOp);
  
          return true;
      }
  };
  
  }  // anonymous namespace
  
  bool AddAndTrueToLoopCondition(TCompiler *compiler, TIntermNode *root)
  {
      AddAndTrueToLoopConditionTraverser traverser;
      root->traverse(&traverser);
      return compiler->validateAST(root);
  }
  
  }  // namespace sh
  

Download