https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119589
--- 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:9e85d056cd15befffb39d2f84902d21eda4d98eb commit r16-462-g9e85d056cd15befffb39d2f84902d21eda4d98eb Author: Richard Biener <rguent...@suse.de> Date: Tue May 6 13:29:42 2025 +0200 tree-optimization/119589 - alignment analysis for VF > 1 and VMAT_STRIDED_SLP The following fixes the alignment analysis done by the VMAT_STRIDED_SLP code which for the case of VF > 1 currently relies on dataref analysis which assumes consecutive accesses. But the code generation advances by DR_STEP between each iteration which requires us to assess that individual DR_STEP preserve the alignment rather than only VF * DR_STEP. This allows us to use vector aligned accesses in some cases. PR tree-optimization/119589 PR tree-optimization/119586 PR tree-optimization/119155 * tree-vect-stmts.cc (vectorizable_store): Verify DR_STEP_ALIGNMENT preserves DR_TARGET_ALIGNMENT when VF > 1 and VMAT_STRIDED_SLP. Use vector aligned accesses when we can. (vectorizable_load): Likewise.
