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-rw-r--r--llvm/lib/CodeGen/MachineCSE.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/MachineCSE.cpp b/llvm/lib/CodeGen/MachineCSE.cpp
index 0766f465456..5a035c7667b 100644
--- a/llvm/lib/CodeGen/MachineCSE.cpp
+++ b/llvm/lib/CodeGen/MachineCSE.cpp
@@ -180,8 +180,8 @@ MachineCSE::isPhysDefTriviallyDead(unsigned Reg,
I = skipDebugInstructionsForward(I, E);
if (I == E)
- // Reached end of block, register is obviously dead.
- return true;
+ // Reached end of block, we don't know if register is dead or not.
+ return false;
bool SeenDef = false;
for (const MachineOperand &MO : I->operands()) {
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