[Bug rtl-optimization/67443] [5/6 regression] DSE removes required store instruction

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67443

--- Comment #22 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Oct 26 15:24:45 2015
New Revision: 229372

URL: https://gcc.gnu.org/viewcvs?rev=229372&root=gcc&view=rev
Log:
2015-10-26  Richard Biener  <rguent...@suse.de>
        Dominik Vogt  <v...@linux.vnet.ibm.com>

        PR middle-end/67443
        * alias.c (ao_ref_from_mem): Remove promoted subreg handling.
        Properly prune ref->ref for accesses outside of ref.

        * gcc.target/s390/pr67443.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.target/s390/pr67443.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/alias.c
    trunk/gcc/testsuite/ChangeLog