target register load optimizations

[Richard Earnshaw]

joern.rennecke@superh.com said:
> 2003-06-18  Stephen Clarke <stephen.clarke@superh.com>
>             J"orn Rennecke <joern.rennecke@superh.com>
> 	* bt-load.c: New file.
> 	* Makefile.in (OBJS): Include bt-load.o
> 	(bt-load.o): Add dependencies.
> 	* flags.h (flag_branch_target_load_optimize): Declare.
> 	(flag_branch_target_load_optimize2): Likewise.
> 	* hooks.c (hook_reg_class_void_no_regs): New function.
> 	(hook_bool_bool_false): Likewise.
> 	* hooks.h (hook_reg_class_void_no_regs, hook_bool_bool_false):
> Declare. 
[...]

I'm intrigued to know which platform you used to 3-stage bootstrap this 
patch.  It seems to me that none could get past the forward declaration of 
"enum reg_class".

R.