https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121395
--- 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:32b1be7eb434addefe203249746dc6bbdc185403 commit r16-2785-g32b1be7eb434addefe203249746dc6bbdc185403 Author: Richard Biener <rguent...@suse.de> Date: Mon Aug 4 14:45:53 2025 +0200 tree-optimization/121395 - SLP of SIMD calls w/o LHS The following records the alternate SLP instance entries coming from stmts with stores that have no SSA def, like OMP SIMD calls without LHS. There's a bit of fallout with having a SLP tree with a NULL vectype, but nothing too gross. PR tree-optimization/121395 * tree-vectorizer.h (_loop_vec_info::alternate_defs): New member. (LOOP_VINFO_ALTERNATE_DEFS): New. * tree-vect-stmts.cc (vect_stmt_relevant_p): Populate it. (vectorizable_simd_clone_call): Do not register a SLP def when there is none. * tree-vect-slp.cc (vect_build_slp_tree_1): Allow a NULL vectype when there's no LHS. Allow all calls w/o LHS. (vect_analyze_slp): Process LOOP_VINFO_ALTERNATE_DEFS as SLP graph entries. (vect_make_slp_decision): Handle a NULL SLP_TREE_VECTYPE. (vect_slp_analyze_node_operations_1): Likewise. (vect_schedule_slp_node): Likewise. * gcc.dg/vect/pr59984.c: Adjust.
