[X86] Add necessary check isReg() when updating LiveVariables in conv…

…ertToThreeAddress Reviewed By: RKSimon Differential Revision: https://reviews.llvm.org/D137388
llvm · Nov 10, 2022 · 5bc36c8 · 5bc36c8
1 parent 27091e6
commit 5bc36c8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp
@@ -1768,7 +1768,7 @@ MachineInstr *X86InstrInfo::convertToThreeAddress(MachineInstr &MI,
   if (LV) {  // Update live variables
     for (unsigned I = 0; I < NumRegOperands; ++I) {
       MachineOperand &Op = MI.getOperand(I);
-      if (Op.isDead() || Op.isKill())
+      if (Op.isReg() && (Op.isDead() || Op.isKill()))
         LV->replaceKillInstruction(Op.getReg(), MI, *NewMI);
     }
   }