Fix subreg fallout in simplify_unary_operation()

[Geoff Keating]

> From: Richard Sandiford <rsandifo@redhat.com>
> Date: Sat, 10 Jan 2004 12:47:17 +0000

> Geoff Keating <geoffk@geoffk.org> writes:
> > No, I don't like this; it complicates the interface of
> > simplify_unary_operation.  Instead, have combine_simplify_rtx
> > compute the mode if it gets passed VOIDmode and is going to call
> > simplify_unary_operation.
> 
> OK, patch below.  Tested as before on mips64vrel-elf.  OK to install?

This is OK.

> 	* combine.c (combine_simplify_rtx): Don't pass VOIDmode to
> 	simplify_unary_operation if the operand has a known mode.


-- 
- Geoffrey Keating <geoffk@geoffk.org>