https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67800
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> --- Ah, so reverting these changes causes FAIL: gcc.dg/vect/slp-reduc-sad.c scan-tree-dump vect "vectorizing stmts using SLP" FAIL: gcc.dg/vect/slp-reduc-sad.c scan-tree-dump-times vect "vectorized 1 loops" 1 with similar testcases using a dot product or widening sum pattern would need to be added. Note that the above are in reduction context but only the first stmt of the reduction chain is marked as such. Thus we need to amend the check with ! STMT_VINFO_GROUP_FIRST_ELEMENT (stmt_vinfo). Testing that now.
