[llvm] [LoopUnswitch] Allow i1 truncs in loop unswitch (PR #89738)

[David Sherwood via llvm-commits]

================
@@ -1930,7 +1930,15 @@ llvm::hasPartialIVCondition(const Loop &L, unsigned MSSAThreshold,
   if (!TI || !TI->isConditional())
     return {};
 
-  auto *CondI = dyn_cast<CmpInst>(TI->getCondition());
+  Instruction *CondI = nullptr;
----------------
david-arm wrote:

I think you can write this more simply as:

```
Instruction *CondI = dyn_cast<CmpInst>(TI->getCondition());
```

https://github.com/llvm/llvm-project/pull/89738