PATCH COMMITTED: Another lower-subreg.c patch

[Roger Sayle]

Hi Ian,

On 1 Feb 2007, Ian Lance Taylor wrote:
> Roger Sayle discovered a case which the lower subreg pass did not
> handle on mips-sgi-irix6.5:
> ...
> The bug was in handling a clobber of a TImode register, cast to
> TFmode, being split to DImode.  This patch fixes the problem.

Many thanks.  My apologies for taking a while to express my gratitude,
but I can now confirm this fixes a full "make bootstrap" on
mips-sgi-irix6.5.  Thanks for the speedy fix (and for the new subreg
lowering pass).

Roger
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