https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85586
--- Comment #4 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> --- Author: rsandifo Date: Wed May 2 07:40:22 2018 New Revision: 259822 URL: https://gcc.gnu.org/viewcvs?rev=259822&root=gcc&view=rev Log: Tighten early exit in vect_analyze_data_ref_dependence (PR85586) The problem in this PR was that we didn't consider aliases between writes in the same strided group. After tightening the early exit we get the expected abs(step) >= 2 versioning check. 2018-05-02 Richard Sandiford <richard.sandif...@linaro.org> gcc/ PR tree-optimization/85586 * tree-vect-data-refs.c (vect_analyze_data_ref_dependence): Only exit early for statements in the same group if the accesses are not strided. gcc/testsuite/ PR tree-optimization/85586 * gcc.dg/vect/pr85586.c: New test. Added: trunk/gcc/testsuite/gcc.dg/vect/pr85586.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-vect-data-refs.c
