diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index da46a847490..0956cb519ef 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -10542,12 +10542,15 @@ SDValue DAGCombiner::visitFMUL(SDNode *N) { if (SDValue NewSel = foldBinOpIntoSelect(N)) return NewSel; - if (Options.UnsafeFPMath) { + if (Options.UnsafeFPMath || + (Flags.hasNoNaNs() && Flags.hasNoSignedZeros())) { // fold (fmul A, 0) -> 0 if (N1CFP && N1CFP->isZero()) return N1; + } - // fmul (fmul X, C1), X2 -> fmul X, C1 * C2 + if (Options.UnsafeFPMath || Flags.hasAllowReassociation()) { + // fmul (fmul X, C1), C2 -> fmul X, C1 * C2 if (N0.getOpcode() == ISD::FMUL) { // Fold scalars or any vector constants (not just splats). // This fold is done in general by InstCombine, but extra fmul insts |
