https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117559
--- Comment #2 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:ba192895d17c4fc4676444fe1bd4a593d20e6def commit r15-5228-gba192895d17c4fc4676444fe1bd4a593d20e6def Author: Richard Biener <rguent...@suse.de> Date: Wed Nov 13 13:56:13 2024 +0100 tree-optimization/117559 - avoid hybrid SLP for masked load/store lanes Hybrid analysis is confused by the mask_conversion pattern making a uniform mask non-uniform. As load/store lanes only uses a single lane to mask all data lanes the SLP graph doesn't cover the alternate (redundant) mask lanes and thus their pattern defs. The following adds a hack to mark them covered. Fixes gcc.target/aarch64/sve/mask_struct_store_?.c with forced SLP. PR tree-optimization/117559 * tree-vect-slp.cc (vect_mark_slp_stmts): Pass in vinfo, mark all mask defs of a load/store-lane .MASK_LOAD/STORE as pure. (vect_make_slp_decision): Adjust. (vect_slp_analyze_bb_1): Likewise.
