[Bug rtl-optimization/57268] [4.9 Regression] c nested loops hang compiler in sched-deps.c

[dtemirbulatov at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57268

--- Comment #4 from Dinar Temirbulatov <dtemirbulatov at gmail dot com> ---
proposed fix posted here
http://gcc.gnu.org/ml/gcc-patches/2013-05/msg01713.html