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-rw-r--r--llvm/lib/CodeGen/LivePhysRegs.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/LivePhysRegs.cpp b/llvm/lib/CodeGen/LivePhysRegs.cpp
index be8c02c212e..6cb3ee15a79 100644
--- a/llvm/lib/CodeGen/LivePhysRegs.cpp
+++ b/llvm/lib/CodeGen/LivePhysRegs.cpp
@@ -57,7 +57,7 @@ void LivePhysRegs::stepBackward(const MachineInstr &MI) {
// Add uses to the set.
for (ConstMIBundleOperands O(MI); O.isValid(); ++O) {
- if (!O->isReg() || !O->readsReg() || O->isUndef())
+ if (!O->isReg() || !O->readsReg())
continue;
unsigned Reg = O->getReg();
if (Reg == 0)
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