[clang] [llvm] [X86][APX] Return CopyMI when added in foldMemoryOperandImpl (PR #191368)

[Phoebe Wang via cfe-commits]

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@@ -7600,13 +7600,22 @@ MachineInstr *X86InstrInfo::foldMemoryOperandImpl(
 
       const TargetRegisterClass &RC = *MF.getRegInfo().getRegClass(SrcReg);
       MachineRegisterInfo &MRI = MF.getRegInfo();
-      Register NewSrc = MRI.isSSA() ? MRI.createVirtualRegister(&RC)
-                                    : MI.getOperand(0).getReg();
+      Register SubReg = X86::NoSubRegister;
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phoebewang wrote:

Good catch, fixed.

https://github.com/llvm/llvm-project/pull/191368
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