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

[Alexey Bataev via llvm-commits]

================
@@ -6111,6 +6141,12 @@ void BoUpSLP::buildTree_rec(ArrayRef<Value *> VL, unsigned Depth,
     if (NumUniqueScalarValues == VL.size()) {
       ReuseShuffleIndicies.clear();
     } else {
+      if (UserTreeIdx.UserTE && UserTreeIdx.UserTE->isNonPowOf2Vec()) {
----------------
alexey-bataev wrote:

Add FIXME here for non-power-of-2 support

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