[PATCH] Optimize subregs of zero and sign extensions (take 2)

[Richard Henderson]

On Wed, Jan 21, 2004 at 07:10:11PM -0700, Roger Sayle wrote:
> 	* rtlanal.c (subreg_lsb_1): New function split out from subreg_lsb.
> 	(subreg_lsb): Change to call new subreg_lsb_1 helper function.
> 	* rtl.h (subreg_lsb_1): Prototype here.
> 	* simplify-rtx.c (simplify_subreg): Optimize subregs of zero and
> 	sign extensions.

Ok.


r~