[llvm] [AArch64] Add flag to control unrolling for small multi-exit loops (PR #131998)

[David Sherwood via llvm-commits]

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@@ -4237,6 +4242,81 @@ getFalkorUnrollingPreferences(Loop *L, ScalarEvolution &SE,
   }
 }
 
+static bool shouldUnrollLoopWithInstruction(Instruction &I,
+                                            AArch64TTIImpl &TTI) {
+  // Don't unroll vectorised loop.
+  if (I.getType()->isVectorTy())
+    return false;
+
+  if (isa<CallInst>(I) || isa<InvokeInst>(I)) {
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david-arm wrote:

Hmm, it's a good suggestion but I checked and it seems `CallBrInst` also derives from `CallBase`. I'm not sure if I should implicitly add support for that by permitting all instances of `CallBase`. If you don't mind I'll leave this as it is for now?

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