diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp index f79e33fe597..b445c33e88c 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp @@ -563,13 +563,9 @@ Instruction *InstCombiner::visitFMul(BinaryOperator &I) { if (match(Op0, m_FNeg(m_Value(X)))) return BinaryOperator::CreateFMulFMF(X, ConstantExpr::getFNeg(C), &I); - // (fmul X, -1.0) --> (fsub -0.0, X) - if (match(C, m_SpecificFP(-1.0))) { - Constant *NegZero = ConstantFP::getNegativeZero(Op1->getType()); - Instruction *RI = BinaryOperator::CreateFSub(NegZero, Op0); - RI->copyFastMathFlags(&I); - return RI; - } + // X * -1.0 --> -X + if (match(C, m_SpecificFP(-1.0))) + return BinaryOperator::CreateFNegFMF(Op0, &I); if (AllowReassociate && C->isFiniteNonZeroFP()) { // Let MDC denote an expression in one of these forms: |
