diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp index f61d82340b5..2fcd003bcbd 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp @@ -425,17 +425,15 @@ Instruction *InstCombiner::visitFMul(BinaryOperator &I) { if (Instruction *NV = FoldOpIntoPhi(I)) return NV; - ConstantFP *C = dyn_cast<ConstantFP>(Op1); - // (fmul X, -1.0) --> (fsub -0.0, X) - if (C && C->isExactlyValue(-1.0)) { - Instruction *RI = BinaryOperator::CreateFSub( - ConstantFP::getNegativeZero(C->getType()), - Op0); + if (match(Op1, m_SpecificFP(-1.0))) { + Constant *NegZero = ConstantFP::getNegativeZero(Op1->getType()); + Instruction *RI = BinaryOperator::CreateFSub(NegZero, Op0); RI->copyFastMathFlags(&I); return RI; } + ConstantFP *C = dyn_cast<ConstantFP>(Op1); if (C && AllowReassociate && C->getValueAPF().isFiniteNonZero()) { // Let MDC denote an expression in one of these forms: // X * C, C/X, X/C, where C is a constant. |
