[Bug tree-optimization/58343] [4.9 Regression] ICE in dfs_enumerate_from, at cfganal.c:1036

[law at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58343

--- Comment #4 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Tue Sep 10 12:29:58 2013
New Revision: 202441

URL: http://gcc.gnu.org/viewcvs?rev=202441&root=gcc&view=rev
Log:
    PR tree-optimization/58343
    * tree-ssa-threadupdate.c (thread_block): Identify and disable
    jump threading requests through loop headers buried in the middle
    of a jump threading path.

    * tree-ssa-threadedge.c (thread_around_empty_blocks): Fix thinko
    in return value/type.

    * gcc.c-torture/compile/pr58343.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr58343.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-threadedge.c
    trunk/gcc/tree-ssa-threadupdate.c