llvm-project

197ead75 - [X86] splitVector - split concat_vectors(a,b,c,d) -> concat_vectors(a,b) + concat_vectors(c,d) (#133753)

[X86] splitVector - split concat_vectors(a,b,c,d) -> concat_vectors(a,b) + concat_vectors(c,d) (#133753) Similar to what we already for build_vectors during subvector extraction, when splitting concat_vectors nodes, attempt to create a pair of half size concat_vectors nodes to see if these can fold.