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-rw-r--r--llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp b/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
index 9f57df87fb2..fc9c227e4df 100644
--- a/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
@@ -959,7 +959,7 @@ EmitMachineNode(SDNode *Node, bool IsClone, bool IsCloned,
}
// Finally mark unused registers as dead.
- if (!UsedRegs.empty() || II.getImplicitDefs())
+ if (!UsedRegs.empty() || II.getImplicitDefs() || II.hasOptionalDef())
MIB->setPhysRegsDeadExcept(UsedRegs, *TRI);
// Run post-isel target hook to adjust this instruction if needed.
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