[Bug tree-optimization/78218] [7 Regression] wrong code at -Os and above on x86_64-linux-gnu (in both 32-bit and 64-bit modes)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78218

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Nov  7 12:26:00 2016
New Revision: 241900

URL: https://gcc.gnu.org/viewcvs?rev=241900&root=gcc&view=rev
Log:
2016-11-07  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/78218
        * gimple-ssa-store-merging.c
        (pass_store_merging::terminate_all_aliasing_chains):
        Drop unused argument, fix alias check to also consider uses.
        (pass_store_merging::execute): Adjust.

        * gcc.dg/torture/pr78218.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr78218.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-ssa-store-merging.c
    trunk/gcc/testsuite/ChangeLog