[Bug tree-optimization/69376] [6 Regression] wrong code at -Os and above on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69376

--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Jan 25 09:05:47 2016
New Revision: 232786

URL: https://gcc.gnu.org/viewcvs?rev=232786&root=gcc&view=rev
Log:
2016-01-25  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/69376
        * tree-ssa-sccvn.h (struct vn_ssa_aux): Add range_info_anti_range_p
        flag.
        (VN_INFO_ANTI_RANGE_P): New inline.
        (VN_INFO_RANGE_TYPE): Likewise.
        * tree-ssa-sccvn.c (set_ssa_val_to): Also record and copy
        SSA_NAME_ANTI_RANGE_P.
        (free_scc_vn): Restore SSA_NAME_ANTI_RANGE_P.
        * tree-ssa-pre.c (eliminate_dom_walker::before_dom_children):
        Properly query VN_INFO_RANGE_TYPE.

        * gcc.dg/torture/pr69376.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr69376.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c
    trunk/gcc/tree-ssa-sccvn.c
    trunk/gcc/tree-ssa-sccvn.h