[llvm] [SLP] no need to generate extract for in-tree uses for original scala… (PR #76077)

[Alexey Bataev via llvm-commits]

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@@ -11898,6 +11864,12 @@ Value *BoUpSLP::vectorizeTree(
     Value *Vec = E->VectorizedValue;
     assert(Vec && "Can't find vectorizable value");
 
+    // Generate extract for in-tree uses if the use is scalar operand in
+    // vectorized instruction.
+    if (auto *UserVecTE = getTreeEntry(User))
+      if (doesInTreeUserNeedToExtract(Scalar, cast<Instruction>(User), TLI))
+        User = cast<llvm::User>(UserVecTE->VectorizedValue);
+
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alexey-bataev wrote:

Why need this? I meant try to fix the place where we buildingExtractUsers directly, I think it can be fixed by proper checking of the scalar element.

https://github.com/llvm/llvm-project/pull/76077