[Bug target/69345] [6 Regression] 459.GemsFDTD regression

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69345

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jan 20 08:36:32 2016
New Revision: 232603

URL: https://gcc.gnu.org/viewcvs?rev=232603&root=gcc&view=rev
Log:
2016-01-20  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/69345
        * tree-ssa-sccvn.h (VN_INFO_RANGE_INFO): New inline function.
        (VN_INFO_PTR_INFO): Likewise.
        * tree-ssa-sccvn.c (set_ssa_val_to): Avoid clearing points-to
        info when it is equal between non-dominating SSA names.
        * tree-ssa-pre.c (eliminate_dom_walker::before_dom_children):
        Make sure to look at original SSA infos.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-pre.c
    trunk/gcc/tree-ssa-sccvn.c
    trunk/gcc/tree-ssa-sccvn.h