diff options
| -rw-r--r-- | llvm/lib/Analysis/InstructionSimplify.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/Analysis/InstructionSimplify.cpp b/llvm/lib/Analysis/InstructionSimplify.cpp index 08afafa7457..dace55a1c09 100644 --- a/llvm/lib/Analysis/InstructionSimplify.cpp +++ b/llvm/lib/Analysis/InstructionSimplify.cpp @@ -703,7 +703,7 @@ static Value *SimplifySubInst(Value *Op0, Value *Op1, bool isNSW, bool isNUW, APInt KnownZero(BitWidth, 0); APInt KnownOne(BitWidth, 0); computeKnownBits(Op1, KnownZero, KnownOne, Q.DL, 0, Q.AC, Q.CxtI, Q.DT); - if (KnownZero == ~APInt::getSignBit(BitWidth)) { + if (KnownZero.isMaxSignedValue()) { // Op1 is either 0 or the minimum signed value. If the sub is NSW, then // Op1 must be 0 because negating the minimum signed value is undefined. if (isNSW) |
