https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85586
--- Comment #5 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> --- Author: rsandifo Date: Wed May 2 07:43:49 2018 New Revision: 259823 URL: https://gcc.gnu.org/viewcvs?rev=259823&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: branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr85586.c Modified: branches/gcc-8-branch/gcc/ChangeLog branches/gcc-8-branch/gcc/testsuite/ChangeLog branches/gcc-8-branch/gcc/tree-vect-data-refs.c
