https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96698
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-10 branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:e563687cf9d3d1278f45aaebd03e0f66531076c9 commit r10-9107-ge563687cf9d3d1278f45aaebd03e0f66531076c9 Author: Richard Biener <rguent...@suse.de> Date: Fri Sep 4 14:35:39 2020 +0200 tree-optimization/96920 - another ICE when vectorizing nested cycles This refines the previous fix for PR96698 by re-doing how and where we arrange for setting vectorized cycle PHI backedge values. 2020-09-04 Richard Biener <rguent...@suse.de> PR tree-optimization/96698 PR tree-optimization/96920 * tree-vectorizer.h (loop_vec_info::reduc_latch_defs): Remove. (loop_vec_info::reduc_latch_slp_defs): Likewise. * tree-vect-stmts.c (vect_transform_stmt): Remove vectorized cycle PHI latch code. * tree-vect-loop.c (maybe_set_vectorized_backedge_value): New helper to set vectorized cycle PHI latch values. (vect_transform_loop): Walk over all PHIs again after vectorizing them, calling maybe_set_vectorized_backedge_value. Call maybe_set_vectorized_backedge_value for each vectorized stmt. Remove delayed update code. * tree-vect-slp.c (vect_analyze_slp_instance): Initialize SLP instance reduc_phis member. (vect_schedule_slp): Set vectorized cycle PHI latch values. * gfortran.dg/vect/pr96920.f90: New testcase. * gcc.dg/vect/pr96920.c: Likewise. (cherry picked from commit 46a58c779af3055a4b10b285a1f4be28abe4351c)
