[llvm] [X86][BF16] Support INSERT_SUBVECTOR and CONCAT_VECTORS (PR #76485)

[Freddy Ye via llvm-commits]

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@@ -7931,6 +7927,14 @@ let Predicates = [HasAVX2, NoVLX] in {
   defm : vextract_lowering<"VEXTRACTI128", v32i8,  v16i8>;
 }
 
+let Predicates = [HasAVXNECONVERT, NoVLX] in {
+  def : Pat<(v16bf16 (X86SubVBroadcastld128 addr:$src)),
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FreddyLeaf wrote:

This file seems to have a good organization on categories of broadcast, insert and extract. Why put these three together?

https://github.com/llvm/llvm-project/pull/76485