[Bug tree-optimization/77979] [7 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: Segmentation fault

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77979

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Oct 14 12:58:18 2016
New Revision: 241162

URL: https://gcc.gnu.org/viewcvs?rev=241162&root=gcc&view=rev
Log:
2016-10-14  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/77979
        * tree-vrp.c (compare_name_with_value): Handle released SSA names
        in the equivalency sets.
        (compare_names): Likewise.

        * gcc.dg/torture/pr77979.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr77979.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c