https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92241
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> --- Author: rguenth Date: Mon Oct 28 13:42:03 2019 New Revision: 277516 URL: https://gcc.gnu.org/viewcvs?rev=277516&root=gcc&view=rev Log: 2019-10-28 Richard Biener <rguent...@suse.de> PR tree-optimization/92241 * tree-vect-loop.c (vect_fixup_scalar_cycles_with_patterns): When we failed to update the reduction index do not use the pattern stmts for the reduction chain. (vectorizable_reduction): When the reduction chain is corrupt, fail. * tree-vect-patterns.c (vect_mark_pattern_stmts): Stop when we fail to update the reduction chain. * gcc.dg/torture/pr92241.c: New testcase. Added: trunk/gcc/testsuite/gcc.dg/torture/pr92241.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-vect-loop.c trunk/gcc/tree-vect-patterns.c
