https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88915
--- Comment #5 from avieira at gcc dot gnu.org --- Author: avieira Date: Tue Oct 29 13:15:46 2019 New Revision: 277569 URL: https://gcc.gnu.org/viewcvs?rev=277569&root=gcc&view=rev Log: [vect]PR 88915: Vectorize epilogues when versioning loops gcc/ChangeLog: 2019-10-29 Andre Vieira <andre.simoesdiasvie...@arm.com> PR 88915 * tree-ssa-loop-niter.h (simplify_replace_tree): Change declaration. * tree-ssa-loop-niter.c (simplify_replace_tree): Add context parameter and make the valueize function pointer also take a void pointer. * gcc/tree-ssa-sccvn.c (vn_valueize_wrapper): New function to wrap around vn_valueize, to call it without a context. (process_bb): Use vn_valueize_wrapper instead of vn_valueize. * tree-vect-loop.c (_loop_vec_info): Initialize epilogue_vinfos. (~_loop_vec_info): Release epilogue_vinfos. (vect_analyze_loop_costing): Use knowledge of main VF to estimate number of iterations of epilogue. (vect_analyze_loop_2): Adapt to analyse main loop for all supported vector sizes when vect-epilogues-nomask=1. Also keep track of lowest versioning threshold needed for main loop. (vect_analyze_loop): Likewise. (find_in_mapping): New helper function. (update_epilogue_loop_vinfo): New function. (vect_transform_loop): When vectorizing epilogues re-use analysis done on main loop and call update_epilogue_loop_vinfo to update it. * tree-vect-loop-manip.c (vect_update_inits_of_drs): No longer insert stmts on loop preheader edge. (vect_do_peeling): Enable skip-vectors when doing loop versioning if we decided to vectorize epilogues. Update epilogues NITERS and construct ADVANCE to update epilogues data references where needed. * tree-vectorizer.h (_loop_vec_info): Add epilogue_vinfos. (vect_do_peeling, vect_update_inits_of_drs, determine_peel_for_niter, vect_analyze_loop): Add or update declarations. * tree-vectorizer.c (try_vectorize_loop_1): Make sure to use already created loop_vec_info's for epilogues when available. Otherwise analyse epilogue separately. Modified: trunk/gcc/ChangeLog trunk/gcc/tree-ssa-loop-niter.c trunk/gcc/tree-ssa-loop-niter.h trunk/gcc/tree-ssa-sccvn.c trunk/gcc/tree-vect-loop-manip.c trunk/gcc/tree-vect-loop.c trunk/gcc/tree-vectorizer.c trunk/gcc/tree-vectorizer.h
