Use float stack slots for e500 promoted arguments

[Steve Ellcey]

On Thu, 2008-07-03 at 19:11 -0400, Daniel Jacobowitz wrote:

> But from a different backtrace.  Could you try this patch?  It fixes
> your testcase, and does not perturb the code used for e500 floating
> point as far as I can tell.

I will put it in my tree for overnight bootstrap testing but I may not
have the results until next week.  It depends on whether or not I look
at it over the holiday weekend.

Steve Ellcey
sje@cup.hp.com