https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92429
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Andre Simoes Dias Vieira <avie...@gcc.gnu.org>: https://gcc.gnu.org/g:f7dff7699fd70d3b8c3e637818e18c86f93ccfec commit r10-5997-gf7dff7699fd70d3b8c3e637818e18c86f93ccfec Author: Andre Vieira <andre.simoesdiasvie...@arm.com> Date: Thu Jan 16 10:28:02 2020 +0000 PR tree-optimization/92429 do not fold when updating epilogue statements This patch addresses the problem reported in PR92429. When creating an epilogue for vectorization we have to replace the SSA_NAMEs in the PATTERN_DEF_SEQs and RELATED_STMTs of the epilogue's loop_vec_infos. When doing this we were using simplify_replace_tree which always folds the replacement. This may lead to a different tree-node than the one which was analyzed in vect_loop_analyze. In turn the new tree-node may require a different vectorization than the one we had prepared for which caused the ICE in question. gcc/ChangeLog: 2020-01-16 Andre Vieira <andre.simoesdiasvie...@arm.com> PR tree-optimization/92429 * tree-ssa-loop-niter.h (simplify_replace_tree): Add parameter. * tree-ssa-loop-niter.c (simplify_replace_tree): Add parameter to control folding. * tree-vect-loop.c (update_epilogue_vinfo): Do not fold when replacing tree. gcc/testsuite/ChangeLog: 2020-01-16 Andre Vieira <andre.simoesdiasvie...@arm.com> PR tree-optimization/92429 * gcc.dg/vect/pr92429.c: New test.
