[llvm] AArch64: Fix assert on fold of undef operand (PR #218600)

[Nathan Corbyn via llvm-commits]

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@@ -10102,9 +10102,9 @@ bool AArch64InstrInfo::optimizeCondBranch(MachineInstr &MI) const {
       return false;
     if (!MRI->hasOneNonDBGUse(CopyVReg))
       return false;
-    if (!MRI->hasOneDef(CopyVReg))
-      return false;
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cofibrant wrote:

Ah I see, thanks!


https://github.com/llvm/llvm-project/pull/218600