[llvm] [SLP] Initial vectorization of non-power-of-2 ops. (PR #77790)

[Alexey Bataev via llvm-commits]

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@@ -4593,6 +4607,10 @@ bool BoUpSLP::canReorderOperands(
     TreeEntry *UserTE, SmallVectorImpl<std::pair<unsigned, TreeEntry *>> &Edges,
     ArrayRef<TreeEntry *> ReorderableGathers,
     SmallVectorImpl<TreeEntry *> &GatherOps) {
+  // Reordering isn't implemented for nodes with padding yet.
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alexey-bataev wrote:

```suggestion
  // FIXME: Reordering isn't implemented for nodes with padding yet.
```


https://github.com/llvm/llvm-project/pull/77790