Another NaT bit propagation bug.

[Richard Henderson]

On Fri, Nov 16, 2001 at 07:08:23AM -0800, Andrew Macleod wrote:
> 	* rtl.h (initialize_uninitialized_subregs): New prototype.
> 	* toplev.c (rest_of_compilation): Call initialize_uninitialized_subregs
> 	when optimization is on.
> 	* flow.c (find_regno_partial): Find subregs within an expression.
> 	(initialize_uninitialized_subregs): Initialize live on entry registers
> 	which are used in subreg expressions.

Ok.


r~