[llvm] [SLP]Emit actual bitwidth for analyzed MinBitwidth nodes, NFCI. (PR #71536)

[Simon Pilgrim via llvm-commits]

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@@ -7892,6 +7892,30 @@ BoUpSLP::getEntryCost(const TreeEntry *E, ArrayRef<Value *> VectorizedVals,
       continue;
     UsedScalars.set(I);
   }
+  auto GetCastGontextHint = [&](Value *V) {
+    TTI::CastContextHint CCH = TTI::CastContextHint::None;
+    if (const TreeEntry *OpTE = getTreeEntry(V)) {
+      if (OpTE->State == TreeEntry::ScatterVectorize) {
+        CCH = TTI::CastContextHint::GatherScatter;
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RKSimon wrote:

(style) just return the CCH enum and break up the if-else chains

https://github.com/llvm/llvm-project/pull/71536