diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/InstructionCombining.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp index 8915598da11..9eb30549f47 100644 --- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp @@ -309,7 +309,8 @@ static inline Value *dyn_castNegVal(Value *V) { // Constants can be considered to be negated values if they can be folded... if (Constant *C = dyn_cast<Constant>(V)) - return ConstantExpr::getNeg(C); + if (!isa<UndefValue>(C)) + return ConstantExpr::getNeg(C); return 0; } |
