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

[David Sherwood via llvm-commits]

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@@ -4703,22 +4769,24 @@ void AArch64TTIImpl::getUnrollingPreferences(Loop *L, ScalarEvolution &SE,
     break;
   }
 
+  if (!L->getExitBlock() && shouldUnrollMultiExitLoop(L, SE, *this)) {
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david-arm wrote:

Yep, I've tried to add something.

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