diff options
Diffstat (limited to 'llvm/lib/Analysis/InstructionSimplify.cpp')
| -rw-r--r-- | llvm/lib/Analysis/InstructionSimplify.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/Analysis/InstructionSimplify.cpp b/llvm/lib/Analysis/InstructionSimplify.cpp index b71b39334ace..4775340b3438 100644 --- a/llvm/lib/Analysis/InstructionSimplify.cpp +++ b/llvm/lib/Analysis/InstructionSimplify.cpp @@ -951,7 +951,7 @@ static Value *simplifyDivRem(Instruction::BinaryOps Opcode, Value *Op0, // X / undef -> poison // X % undef -> poison - if (Q.isUndefValue(Op1)) + if (Q.isUndefValue(Op1) || isa<PoisonValue>(Op1)) return PoisonValue::get(Ty); // X / 0 -> poison @@ -2418,6 +2418,10 @@ static Value *SimplifyXorInst(Value *Op0, Value *Op1, const SimplifyQuery &Q, if (Constant *C = foldOrCommuteConstant(Instruction::Xor, Op0, Op1, Q)) return C; + // X ^ poison -> poison + if (isa<PoisonValue>(Op1)) + return Op1; + // A ^ undef -> undef if (Q.isUndefValue(Op1)) return Op1; |