[llvm] [LV]Set tailfolding styles before computing feasible max VF. (PR #91403)

[Florian Hahn via llvm-commits]

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@@ -4198,15 +4212,17 @@ bool LoopVectorizationCostModel::runtimeChecksRequired() {
   return false;
 }
 
-ElementCount
-LoopVectorizationCostModel::getMaxLegalScalableVF(unsigned MaxSafeElements) {
+bool LoopVectorizationCostModel::isScalableVectorizationAllowed() {
+  if (IsScalableVectorizationAllowed)
+    return *IsScalableVectorizationAllowed;
+  IsScalableVectorizationAllowed = false;
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fhahn wrote:

nit: newline above to more clearly separate this exit from the remainder

https://github.com/llvm/llvm-project/pull/91403