[llvm] [LV] Incorporate trip counts into selection of scalable VFs (PR #80926)

[Florian Hahn via llvm-commits]

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@@ -4933,11 +4933,17 @@ bool LoopVectorizationPlanner::isMoreProfitable(
       EstimatedWidthB *= *VScale;
   }
 
+  if (MaxTripCount > 0) {
+    EstimatedWidthA = std::min(EstimatedWidthA, MaxTripCount);
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fhahn wrote:

Ah yes, the cases I was thinking about were limiting to a smaller *scalable* VF.

https://github.com/llvm/llvm-project/pull/80926