[Bug middle-end/70054] [6 Regression] GCC 6 gives a strict-aliasing warning on use of std::aligned_storage

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70054

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Mar  4 08:31:19 2016
New Revision: 233961

URL: https://gcc.gnu.org/viewcvs?rev=233961&root=gcc&view=rev
Log:
2016-03-04  Richard Biener  <rguent...@suse.de>

        PR c++/70054
        * c-common.c (strict_aliasing_warning): Use alias_set_subset_of
        instead of alias_sets_conflict_p.

        * g++.dg/warn/Wstrict-aliasing-bogus-union-2.C: New testcase.
        * gcc.dg/Wstrict-aliasing-struct-member.c: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/warn/Wstrict-aliasing-bogus-union-2.C
    trunk/gcc/testsuite/gcc.dg/Wstrict-aliasing-struct-member.c
Modified:
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/c-common.c
    trunk/gcc/testsuite/ChangeLog