https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117502
--- Comment #1 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:0b27a7dd050262a7d64d87863201e4ebbde88386 commit r15-5117-g0b27a7dd050262a7d64d87863201e4ebbde88386 Author: Richard Biener <rguent...@suse.de> Date: Fri Nov 8 13:06:07 2024 +0100 tree-optimization/117502 - VMAT_STRIDED_SLP vs VMAT_ELEMENTWISE when considering gather The following treats both the same when considering to use gather or scatter for single-element interleaving accesses. This will cause FAIL: gcc.target/aarch64/sve/sve_iters_low_2.c scan-tree-dump-not vect "LOOP VECTORIZED" where we now vectorize the loop with VNx4QI, I'll leave it to ARM folks to investigate whether that's OK and to adjust the testcase or to see where to adjust things to make the testcase not vectorized again. The original fix for which the testcase was introduced is still efffective. PR tree-optimization/117502 * tree-vect-stmts.cc (get_group_load_store_type): Also consider VMAT_STRIDED_SLP when checking to use gather/scatter for single-element interleaving access. * tree-vect-loop.cc (update_epilogue_loop_vinfo): STMT_VINFO_STRIDED_P can be classified as VMAT_GATHER_SCATTER, so update DR_REF for those as well.
