[llvm] [SLP][REVEC] Fix the mismatch between the result of getAltInstrMask and the VecTy argument of TargetTransformInfo::isLegalAltInstr. (PR #134795)

[Alexey Bataev via llvm-commits]

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@@ -6667,11 +6666,12 @@ void BoUpSLP::reorderTopToBottom() {
     // to take into account their order when looking for the most used order.
     if (TE->hasState() && TE->isAltShuffle() &&
         TE->State != TreeEntry::SplitVectorize) {
-      VectorType *VecTy =
-          getWidenedType(TE->Scalars[0]->getType(), TE->Scalars.size());
+      Type *ScalarTy = TE->Scalars[0]->getType();
+      VectorType *VecTy = getWidenedType(ScalarTy, TE->Scalars.size());
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alexey-bataev wrote:

Better not to hide ScalarTy, use another name for the var

https://github.com/llvm/llvm-project/pull/134795