[llvm] [SLP]Improve/fix subvectors in gather/buildvector nodes handling (PR #104144)

[Simon Pilgrim via llvm-commits]

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@@ -3104,6 +3104,10 @@ class BoUpSLP {
     /// The index of this treeEntry in VectorizableTree.
     int Idx = -1;
 
+    /// For gather/buildvector/alt opcode (TODO) nodes, which are combined from
+    /// other nodes as a serie of insertvector instructions.
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RKSimon wrote:

serie -> series

https://github.com/llvm/llvm-project/pull/104144