[llvm] [SLP]Initial support for non-power-of-2 (but still whole register) number of elements in operands. (PR #107273)

[Philip Reames via llvm-commits]

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@@ -5200,7 +5234,7 @@ BoUpSLP::getReorderingData(const TreeEntry &TE, bool TopToBottom) {
   // node.
   if (!TE.ReuseShuffleIndices.empty()) {
     // FIXME: Support ReuseShuffleIndices for non-power-of-two vectors.
-    assert(!TE.isNonPowOf2Vec() &&
+    assert(!TE.hasNonWholeRegisterElems(*TTI) &&
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preames wrote:

Same as above.

https://github.com/llvm/llvm-project/pull/107273