rfa (x86): 387<=>sse moves

[Dale Johannesen]

On Jul 26, 2005, at 3:34 PM, Dale Johannesen wrote:
>
> I think the RA may be missing the concept that memory might be faster 
> than any possible register....
> will dig further.

Yes, it is.  The following fixes my problem, and causes a couple of 
3DNow-specific regressions
in the testsuite which I need to look at, but nothing serious; I think 
it's gotten far enough to post
for opinions.  This is intended to go on top of Paolo's patch
http://gcc.gnu.org/ml/gcc-patches/2005-07/msg01044.html
It may, of course, run afoul of inaccuracies in the patterns on various 
targets, haven't
tried any performance testing yet.

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