[TwoAddressInstruction] Use isPlainlyKilled in processTiedPairs (#65976)

Calling isPlainlyKilled instead of directly checking for a kill flag
should make processTiedPairs behave the same with LiveIntervals
(i.e. when compiling with -early-live-intervals) as it does with
LiveVariables.

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp b/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
index 560a0a4..4ae3967 100644
--- a/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -1566,7 +1566,7 @@ TwoAddressInstructionPass::processTiedPairs(MachineInstr *MI,
     MachineOperand &MO = MI->getOperand(SrcIdx);
     assert(MO.isReg() && MO.getReg() == RegB && MO.isUse() &&
            "inconsistent operand info for 2-reg pass");
-    if (MO.isKill()) {
+    if (isPlainlyKilled(MO)) {
       MO.setIsKill(false);
       RemovedKillFlag = true;
     }
@@ -1587,7 +1587,7 @@ TwoAddressInstructionPass::processTiedPairs(MachineInstr *MI,
     for (MachineOperand &MO : MI->all_uses()) {
       if (MO.getReg() == RegB) {
         if (MO.getSubReg() == SubRegB && !IsEarlyClobber) {
-          if (MO.isKill()) {
+          if (isPlainlyKilled(MO)) {
             MO.setIsKill(false);
             RemovedKillFlag = true;
           }