* Makefile.in: New rule for cprop.o.
	* gcse.c: Move constant/copy propagation to cprop.c.
	(compute_local_properties): Only handle expression tables.
	(hash_scan_set, compute_hash_table_work, alloc_hash_table,): Likewise.
	(one_pre_gcse_pass, one_code_hoisting_pass): Likewise.
	(hash_set, insert_set_in_table, gcse_constant_p, lookup_set,
	next_set, reset_opr_set_tables, oprs_not_set_p, mark_call, mark_set,
	mark_clobber, mark_oprs_set, alloc_cprop_mem, free_cprop_mem, 
	compute_cprop_data, find_used_regs, try_replace_reg,
	find_avail_set, cprop_jump, constprop_register, cprop_insn,
	local_cprop_find_used_regs, do_local_cprop, local_cprop_pass,
	fis_get_condition, implicit_set_cond_p, find_implicit_sets,
	find_bypass_set, reg_killed_on_edge, bypass_block,
	bypass_conditional_jumps, one_cprop_pass, gate_rtl_cprop,
	execute_rtl_cprop, pass_rtl_cprop): Move to...
	* cprop.c: ...here.  New file, constant/copy propagation for RTL
	moved from gcse.c to here with minor cleanups in duplicated code.

From-SVN: r171627