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author | Tobias Hunger <tobias.hunger@qt.io> | 2019-04-16 16:32:08 +0200 |
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committer | Tobias Hunger <tobias.hunger@qt.io> | 2019-04-16 16:32:08 +0200 |
commit | 6630937e63ae5797487b86743a7733c8ae5cc42c (patch) | |
tree | 3d53dacf6430f9099e1fb20835881205de674961 /src/3rdparty/angle/src/compiler/translator/AddAndTrueToLoopCondition.cpp | |
parent | 37ed6dae00640f9cc980ffda05347c12a7eb5d7e (diff) | |
parent | c7af193d2e49e9f10b86262e63d8d13abf72b5cf (diff) |
Merge commit 'dev' into 'wip/cmake-merge'
Change-Id: I176c40d031be26a1dd1cf08843e448a660598783
Diffstat (limited to 'src/3rdparty/angle/src/compiler/translator/AddAndTrueToLoopCondition.cpp')
-rw-r--r-- | src/3rdparty/angle/src/compiler/translator/AddAndTrueToLoopCondition.cpp | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/compiler/translator/AddAndTrueToLoopCondition.cpp b/src/3rdparty/angle/src/compiler/translator/AddAndTrueToLoopCondition.cpp new file mode 100644 index 0000000000..6a05104233 --- /dev/null +++ b/src/3rdparty/angle/src/compiler/translator/AddAndTrueToLoopCondition.cpp @@ -0,0 +1,59 @@ +// +// 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. +// + +#include "compiler/translator/AddAndTrueToLoopCondition.h" + +#include "compiler/translator/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. + TConstantUnion *trueConstant = new TConstantUnion(); + trueConstant->setBConst(true); + TIntermTyped *trueValue = new TIntermConstantUnion(trueConstant, TType(EbtBool)); + + // CONDITION && true. + TIntermBinary *andOp = new TIntermBinary(EOpLogicalAnd, loop->getCondition(), trueValue); + loop->setCondition(andOp); + + return true; + } +}; + +} // anonymous namespace + +void AddAndTrueToLoopCondition(TIntermNode *root) +{ + AddAndTrueToLoopConditionTraverser traverser; + root->traverse(&traverser); +} + +} // namespace sh |