[Bug tree-optimization/79529] [7 Regression] ICE in is_maybe_undefined (tree-ssa-loop-unswitch.c:162)

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79529

--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Fri Feb 17 14:36:08 2017
New Revision: 245530

URL: https://gcc.gnu.org/viewcvs?rev=245530&root=gcc&view=rev
Log:
Introduce ssa_defined_default_def_p function (PR tree-optimization/79529).

2017-02-17  Martin Liska  <mliska@suse.cz>

        PR tree-optimization/79529
        * tree-ssa-loop-unswitch.c (is_maybe_undefined): Use
        ssa_defined_default_def_p to handle cases which are implicitly
        defined.
        * tree-ssa.c (ssa_defined_default_def_p): New function.
        (ssa_undefined_value_p): Use ssa_defined_default_def_p to handle cases
        which are implicitly defined.
        * tree-ssa.h (ssa_defined_default_def_p): Declare.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-loop-unswitch.c
    trunk/gcc/tree-ssa.c
    trunk/gcc/tree-ssa.h