[llvm] [AArch64] Enable unrolling for small multi-exit loops (PR #131998)

[Florian Hahn via llvm-commits]

================
@@ -4542,43 +4631,18 @@ getAppleRuntimeUnrollPreferences(Loop *L, ScalarEvolution &SE,
   if (!L->isInnermost() || L->getNumBlocks() > 8)
     return;
 
+  // This is handled by common code.
----------------
fhahn wrote:

```suggestion
  // Loops with multiple exits are handled by common code.
```

https://github.com/llvm/llvm-project/pull/131998