[Bug tree-optimization/81977] [5/6/7 Regression] Issue with inline memcpy with optimizations enabled

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81977

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Aug 28 11:42:23 2017
New Revision: 251378

URL: https://gcc.gnu.org/viewcvs?rev=251378&root=gcc&view=rev
Log:
2017-08-28  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/81977
        * tree-ssa-sccvn.c (vn_reference_lookup_3): Fix look through
        memcpy.

        * g++.dg/torture/pr81977.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/torture/pr81977.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c