diff options
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp index 79caf880219..35ca9fa4f2f 100644 --- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -1953,10 +1953,8 @@ bool TargetLowering::SimplifyDemandedBits( if (C && !C->isAllOnesValue() && !C->isOne() && (C->getAPIntValue() | HighMask).isAllOnesValue()) { SDValue Neg1 = TLO.DAG.getAllOnesConstant(dl, VT); - // We can't guarantee that the new math op doesn't wrap, so explicitly - // clear those flags to prevent folding with a potential existing node - // that has those flags set. - SDNodeFlags Flags; + // Disable the nsw and nuw flags. We can no longer guarantee that we + // won't wrap after simplification. Flags.setNoSignedWrap(false); Flags.setNoUnsignedWrap(false); SDValue NewOp = TLO.DAG.getNode(Op.getOpcode(), dl, VT, Op0, Neg1, Flags); |
