[Bug tree-optimization/86363] [9 Regression] wrong code with __builtin_memset() at -O1

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86363

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Jul  2 13:32:26 2018
New Revision: 262307

URL: https://gcc.gnu.org/viewcvs?rev=262307&root=gcc&view=rev
Log:
2018-07-02  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/86363
        * tree-ssa-sccvn.c (vn_reference_lookup_3): Check the
        memset argument refers to a non-variable address.

        * gcc.dg/torture/pr86363.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr86363.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c