[llvm] [BranchFolding] Refactor AreConditionalsEqual to Helper (PR #211270)

[Matt Arsenault via llvm-commits]

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@@ -1391,6 +1391,15 @@ static void salvageDebugInfoFromEmptyBlock(const TargetInstrInfo *TII,
       copyDebugInfoToPredecessor(TII, MBB, *PredBB);
 }
 
+static bool AreConditionalsEqual(ArrayRef<MachineOperand> CurCond,
+                                 ArrayRef<MachineOperand> PriorCond) {
+  return CurCond.size() > 0 &&
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arsenm wrote:

If this is known to be conditional branch, then can't you assume CurCond isn't empty?

```suggestion
  return !CurCond.empty() &&
```

https://github.com/llvm/llvm-project/pull/211270