2004-05-25  Paolo Bonzini  <bonzini@gnu.org>

	* Makefile.in (OBJS): Add rtlhooks.o.
	(rtlanal.o): Depend on function.h.
	(cse.o): Depend on rtlhooks-def.h.
	(combine.o): Depend on rtlhooks-def.h.
	(rtlhooks.o): New rule.
	* combine.c: Include rtlhooks-def.h.
	(nonzero_bits, cached_nonzero_bits, nonzero_bits1,
	num_sign_bit_copies, cached_num_sign_bit_copies,
	num_sign_bit_copies1): Move most of the code to rtlanal.c.
	(reg_nonzero_bits_for_combine,
	reg_num_sign_bit_copies_for_combine): New functions holding
	the remnants of the above.
	(combine_rtl_hooks): New.
	(combine_instructions): Set rtl_hooks instead of gen_lowpart.
	* cse.c: Include rtlhooks-def.h.
	(cse_rtl_hooks): New.
	(cse_main): Set rtl_hooks instead of gen_lowpart.
	* emit-rtl.c (gen_lowpart): Remove.
	(gen_lowpart_general): Move to rtlhooks.c.
	* rtl.h (nonzero_bits, num_sign_bit_copies,
	struct rtl_hooks, rtl_hooks, general_rtl_hooks): New.
	(gen_lowpart_general): Remove.
	(gen_lowpart): Temporarily redefine as a macro.
	* rtlanal.c: Include function.h.
	(nonzero_bits, cached_nonzero_bits, nonzero_bits1,
	num_sign_bit_copies, cached_num_sign_bit_copies,
	num_sign_bit_copies1): New, from combine.c.
	* rtlhooks.c: New file.

From-SVN: r82234