https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81740
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> --- Author: rguenth Date: Wed Sep 4 11:56:15 2019 New Revision: 275372 URL: https://gcc.gnu.org/viewcvs?rev=275372&root=gcc&view=rev Log: 2019-09-04 Richard Biener <rguent...@suse.de> Backport from mainline 2019-03-26 Bin Cheng <bin.ch...@linux.alibaba.com> PR tree-optimization/81740 * tree-vect-data-refs.c (vect_analyze_data_ref_dependence): In case of outer loop vectorization, check for backward dependence at the inner loop if outer loop dependence is reversed. * gcc.dg/vect/pr81740-1.c: New testcase. * gcc.dg/vect/pr81740-2.c: Likewise. Added: branches/gcc-7-branch/gcc/testsuite/gcc.dg/vect/pr81740-1.c branches/gcc-7-branch/gcc/testsuite/gcc.dg/vect/pr81740-2.c Modified: branches/gcc-7-branch/gcc/ChangeLog branches/gcc-7-branch/gcc/testsuite/ChangeLog branches/gcc-7-branch/gcc/tree-vect-data-refs.c
