[Bug c++/79825] [7 Regression] Uninitialized uses in aggregate copies of empty structs (missed DCE in C++ gimplify)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79825

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Mar  3 11:30:32 2017
New Revision: 245866

URL: https://gcc.gnu.org/viewcvs?rev=245866&root=gcc&view=rev
Log:
2017-03-03  Richard Biener  <rguent...@suse.de>

        PR c++/79825
        * cp-gimplify.c (simple_empty_class_p): Handle EMPTY_CLASS_EXPR.

        * g++.dg/warn/Wuninitialized-8.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/warn/Wuninitialized-8.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/cp-gimplify.c
    trunk/gcc/testsuite/ChangeLog