diff options
| author | Chris Lattner <sabre@nondot.org> | 2004-02-02 20:09:56 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2004-02-02 20:09:56 +0000 |
| commit | 0517e7209615054b47a57be94e488874850fd5d5 (patch) | |
| tree | a5a82451b4aa164a9fa59654646a31b653449624 | |
| parent | 529429224c9334ca308e1a8563d03f52196fc342 (diff) | |
Disable (x - (y - z)) => (x + (z - y)) optimization for floating point.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11083 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index bc9558e8db..8a089555b8 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -512,7 +512,8 @@ Instruction *InstCombiner::visitSub(BinaryOperator &I) { // Replace (x - (y - z)) with (x + (z - y)) if the (y - z) subexpression // is not used by anyone else... // - if (Op1I->getOpcode() == Instruction::Sub) { + if (Op1I->getOpcode() == Instruction::Sub && + !Op1I->getType()->isFloatingPoint()) { // Swap the two operands of the subexpr... Value *IIOp0 = Op1I->getOperand(0), *IIOp1 = Op1I->getOperand(1); Op1I->setOperand(0, IIOp1); |