Timing information for CFG manipulations

[Brad Lucier]

> I don't have time to finish bootstrap, but the patch appears to work.
> OK assuming the bootstrapping/regtesting i386 passes fluently?
> 
> Honza
> 
> Tue Oct 16 16:56:33 CEST 2001  Jan Hubicka  <jh@suse.cz>
> 	* basic-block.h (find_sub_basic_blocks): Use sbitmap parameter.
> 	* cfgbuild.c (find_bb_boundaries): Break out from ...
> 	(find_sub_basic_blocks): ... here; reorganize to handle multiple
> 	basic blocks at once.
> 	* cfgrtl.c (commite_one_edge_insertion): Create an bitmap to pass
> 	to find_sub_basic_blocks.
> 	* recog.c (split_all_insns): Update find_sub_basic_blocks call.

I haven't seen this patch approved or acknowledged yet, but if it helps, I
bootstrapped and regtested it on i686-pc-linux-gnu, see

http://gcc.gnu.org/ml/gcc-testresults/2001-10/msg00245.html

Brad