[Bug tree-optimization/82397] [8 Regression] qsort comparator non-negative on sorted output: 1 in vect_analyze_data_ref_accesses

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82397

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Oct  6 09:27:09 2017
New Revision: 253482

URL: https://gcc.gnu.org/viewcvs?rev=253482&root=gcc&view=rev
Log:
2017-10-06  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/82397
        * tree-vect-data-refs.c (dr_group_sort_cmp): Do not use
        operand_equal_p but rely on data_ref_compare_tree for detecting
        equalities.
        (vect_analyze_data_ref_accesses): Use data_ref_compare_tree
        to match up with dr_group_sort_cmp.

        * gfortran.dg/pr82397.f: New testcase.

Added:
    trunk/gcc/testsuite/gfortran.dg/pr82397.f
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-data-refs.c