[DRAFT][s4xbf16] JoinOp vectorization patch (Rebased)#25

ggengnv wants to merge 2 commits intoopenxla:llvm-head-stagingopenxla/triton:llvm-head-stagingfrom

ggengnv:new_int4_join_vectorizeggengnv/xla-triton:new_int4_join_vectorizeCopy head branch name to clipboard