[llvm] [SLP][REVEC] Make reorderTopToBottom support ShuffleVectorInst. (PR #117310)

[Han-Kuan Chen via llvm-commits]

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@@ -6005,10 +6005,12 @@ void BoUpSLP::reorderTopToBottom() {
       if ((TE->State == TreeEntry::Vectorize ||
            TE->State == TreeEntry::StridedVectorize) &&
           isa<ExtractElementInst, ExtractValueInst, LoadInst, StoreInst,
-              InsertElementInst>(TE->getMainOp())) {
+              InsertElementInst, ShuffleVectorInst>(TE->getMainOp())) {
         assert(!TE->isAltShuffle() &&
                "Alternate instructions are only supported by BinaryOperator "
                "and CastInst.");
+        assert(!isa<ShuffleVectorInst>(TE->getMainOp()) ||
+               SLPReVec && "Only supported by REVEC.");
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HanKuanChen wrote:

How does the TreeEntry has `ShuffleVectorInst` as Scalars without REVEC? `ShuffleVectorInst` returns vector.

https://github.com/llvm/llvm-project/pull/117310