[Bug rtl-optimization/49936] [4.7 Regression] IRA handles CANNOT_CHANGE_MODE_CLASS poorly, + spills to memory on 4.7

[vmakarov at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49936

--- Comment #5 from Vladimir Makarov <vmakarov at gcc dot gnu.org> 2011-08-19 
22:17:29 UTC ---
Author: vmakarov
Date: Fri Aug 19 22:17:26 2011
New Revision: 177916

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=177916
Log:
2011-08-19  Vladimir Makarov  <vmaka...@redhat.com>

    PR rtl-optimization/49936
    * ira.c (ira_init_register_move_cost): Ignore too small subclasses
    for calculation of max register move costs.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ira.c