[X86][AVX] combineInsertSubvector - remove concat_vectors(load(x),load(x)) --> sub_vbroadcast(x)

D58053/rL354340 added this to EltsFromConsecutiveLoads directly

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354732 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed