[Bug rtl-optimization/49890] IRA spill with plenty of available registers

[vmakarov at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49890

Vladimir Makarov <vmakarov at redhat dot com> changed:

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                 CC|                            |vmakarov at redhat dot com

--- Comment #1 from Vladimir Makarov <vmakarov at redhat dot com> 2011-08-18 16:12:45 UTC ---
IRA removes some classes for consideration on the 2nd pass to speed up cost
calculation which is very time consuming.  IRA did it in too optimistic way. 
That is the reason of the problem.

I'll send a patch which removes classes in more conservative way and fixes the
problem.