[Bug target/37488] register allocation spills floats needlessly

[vmakarov at redhat dot com]

------- Comment #7 from vmakarov at redhat dot com  2009-06-29 19:44 -------
Paolo, Steven, thanks for looking into this problem.  Using the mips approach
is a good idea.  Although the costs of FLOAT_REGS and SSE_REGS are the same in
ira-costs.c, IRA should prefer SSE_REGS or FLOAT_REGS depending on -fpmath=
option.

The implementation will take some time because choosing a cover class depends
not only on order of them in IRA_COVER_CLASSES macro but also on order of them
in enum reg_class.  I hope I'll have a patch on this week.



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37488