Fix PR 39592 (excess precision ICE with -msse)

[Uros Bizjak]

Hello!

> 2009-03-31  Joseph Myers  <joseph@codesourcery.com>
>
> 	PR target/39592
> 	* config/i386/i386.md (*floatunssi<mode>2_1, two unnamed
> 	define_splits, floatunssi<mode>2): Require x87 conversions from
> 	DImode to be permitted.
>
> testsuite:
> 2009-03-31  Joseph Myers  <joseph@codesourcery.com>
>
> 	PR target/39592
> 	* gcc.target/i386/pr39592-1.c: New test.


This is OK for mainline.

Thanks,
Uros.