[llvm] [SLP][REVEC] Fix insertelement has multiple uses. (PR #102329)

[Alexey Bataev via llvm-commits]

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@@ -6402,6 +6402,14 @@ BoUpSLP::TreeEntry::EntryState BoUpSLP::getScalarsVectorizationState(
       return TreeEntry::NeedToGather;
     }
 
+    if (any_of(VL, [&SourceVectors](Value *V) {
+          if (SourceVectors.contains(V))
+            return !V->hasOneUse();
+          // The last InsertElement can have multiple uses.
+          return false;
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alexey-bataev wrote:

`return SourceVectors.contains(V) && !V->hasOneUse();`

https://github.com/llvm/llvm-project/pull/102329