https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106226
--- Comment #3 from CVS 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:cf3a120084e94614a4917f71940325cd4b537f24 commit r13-1575-gcf3a120084e94614a4917f71940325cd4b537f24 Author: Richard Biener <rguent...@suse.de> Date: Fri Jul 8 10:41:59 2022 +0200 tree-optimization/106226 - move vectorizer virtual SSA update When we knowingly have broken virtual SSA form we need to update it before we eventually perform slpeel manual updating which will call delete_update_ssa. Currently that's done on-demand but communicating whether it's a known unavoidable case is broken there. The following makes that a synchronous operation but instead of actually performing the update we instead recod the need, clear the update SSA sub-state and force virtual renaming at the very end of the vectorization pass. PR tree-optimization/106226 * tree-vect-loop-manip.cc (vect_do_peeling): Assert that no SSA update is needed. Move virtual SSA update ... * tree-vectorizer.cc (pass_vectorize::execute): ... here, via forced virtual renaming when TODO_update_ssa_only_virtuals is queued. (vect_transform_loops): Return TODO_update_ssa_only_virtuals when virtual SSA update is required. (try_vectorize_loop_1): Adjust. * tree-vect-stmts.cc (vectorizable_simd_clone_call): Allow virtual renaming if the ABI forces an aggregate return but the original call did not have a virtual definition. * gfortran.dg/pr106226.f: New testcase.
