[llvm] [SLP] NFC. Remove the useless check for alternate instruction. (PR #117116)

[Alexey Bataev via llvm-commits]

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@@ -5999,8 +5999,7 @@ void BoUpSLP::reorderTopToBottom() {
       if ((TE->State == TreeEntry::Vectorize ||
            TE->State == TreeEntry::StridedVectorize) &&
           isa<ExtractElementInst, ExtractValueInst, LoadInst, StoreInst,
-              InsertElementInst>(TE->getMainOp()) &&
-          !TE->isAltShuffle()) {
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alexey-bataev wrote:

Add the assertion

https://github.com/llvm/llvm-project/pull/117116