[Bug rtl-optimization/60947] [4.9/4.10 Regression] Unable to handle kernel paging request (linux kernel 2.6.28.9) with gcc 4.9 release

[yufan8.chen at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60947

--- Comment #10 from YuFan <yufan8.chen at gmail dot com> ---
After more tests, I figure out the issue is caused by the commit:

SVN revision:
r206552 | amker | 2014-01-11 17:33:39 +0800 (六, 11  1月 2014) | 7 lines


        * tree-ssa-loop-ivopts.c (iv_ca_narrow): New parameter.
        Start narrowing with START.  Apply candidate-use pair
        and check overall cost in narrowing.
        (iv_ca_prune): Pass new argument.