[Bug tree-optimization/69117] [6 Regression] wrong code at -O1 -fstrict-aliasing

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69117

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Jan 15 08:16:08 2016
New Revision: 232401

URL: https://gcc.gnu.org/viewcvs?rev=232401&root=gcc&view=rev
Log:
2016-01-15  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/69117
        * tree-ssa-sccvn.h (struct vn_ssa_aux): Add info member.
        * tree-ssa-sccvn.c (set_ssa_val_to): Save and adjust SSA name info
        of the leader conservatively.
        (free_scc_vn): Restore original SSA name infos.

        * gcc.dg/torture/pr69117.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr69117.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c
    trunk/gcc/tree-ssa-sccvn.h