diff options
Diffstat (limited to 'llvm/lib/IR/ConstantFold.cpp')
-rw-r--r-- | llvm/lib/IR/ConstantFold.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/lib/IR/ConstantFold.cpp b/llvm/lib/IR/ConstantFold.cpp index 49ef302..a05c594 100644 --- a/llvm/lib/IR/ConstantFold.cpp +++ b/llvm/lib/IR/ConstantFold.cpp @@ -960,8 +960,9 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode, // X >>a undef -> undef if (isa<UndefValue>(C2)) return C2; - // undef >>a X -> all ones - return Constant::getAllOnesValue(C1->getType()); + // TODO: undef >>a X -> undef if the shift is exact + // undef >>a X -> 0 + return Constant::getNullValue(C1->getType()); case Instruction::Shl: // X << undef -> undef if (isa<UndefValue>(C2)) |