[Bug tree-optimization/69719] [5/6 Regression] wrong code at -O3 on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69719

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Feb  8 14:51:20 2016
New Revision: 233212

URL: https://gcc.gnu.org/viewcvs?rev=233212&root=gcc&view=rev
Log:
2016-02-08  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/69719
        * tree-vect-data-refs.c (vect_prune_runtime_alias_test_list):
        Properly use absolute of the difference of the two offsets to
        compare or adjust the segment length.

        * gcc.dg/torture/pr69719.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr69719.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-data-refs.c