[Bug tree-optimization/58640] [4.9 Regression] wrong code (segfaults) at -O3 on x86_64-linux-gnu

[law at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58640

--- Comment #6 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Fri Oct 11 20:31:25 2013
New Revision: 203463

URL: http://gcc.gnu.org/viewcvs?rev=203463&root=gcc&view=rev
Log:
    PR tree-optimization/58640
    * tree-ssa-threadupdate.c (mark_threaded_blocks): Truncate jump threading
    paths that cross over two loop entry points.

    * gcc.c-torture/execute/pr58640.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr58640.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-threadupdate.c