* gimple.h: Move some prototypes to gimple-expr.h and add to include
	list.
	(extract_ops_from_tree, gimple_call_addr_fndecl, is_gimple_reg_type):
	Move to gimple-expr.h.
	* gimple-expr.h: New file.  Relocate some prototypes from gimple.h.
	(types_compatible_p, is_gimple_reg_type, is_gimple_variable,
	is_gimple_id, virtual_operand_p, is_gimple_addressable,
	is_gimple_constant, extract_ops_from_tree, gimple_call_addr_fndecl):
	Relocate here.
	* gimple.c (extract_ops_from_tree_1, gimple_cond_get_ops_from_tree,
	gimple_set_body, gimple_body, gimple_has_body_p, is_gimple_lvalue,
	is_gimple_condexpr, is_gimple_addressable, is_gimple_constant,
	is_gimple_address, is_gimple_invariant_address,
	is_gimple_ip_invariant_address, is_gimple_min_invariant,
	is_gimple_ip_invariant, is_gimple_variable, is_gimple_id,
	virtual_operand_p, is_gimple_reg, is_gimple_val, is_gimple_asm_val,
	is_gimple_min_lval, is_gimple_call_addr, is_gimple_mem_ref_addr,
	gimple_decl_printable_name, useless_type_conversion_p,
	types_compatible_p, gimple_can_coalesce_p, copy_var_decl): Move to 
	gimple-expr.[ch].
	* gimple-expr.c: New File.
	(useless_type_conversion_p, gimple_set_body, gimple_body,
	gimple_has_body_p, gimple_decl_printable_name, copy_var_decl,
	gimple_can_coalesce_p, extract_ops_from_tree_1, 
	gimple_cond_get_ops_from_tree, is_gimple_lvalue, is_gimple_condexpr,
	is_gimple_address, is_gimple_invariant_address,
	is_gimple_ip_invariant_address, is_gimple_min_invariant,
	is_gimple_ip_invariant, is_gimple_reg, is_gimple_val,
	is_gimple_asm_val, is_gimple_min_lval, is_gimple_call_addr,
	is_gimple_mem_ref_addr): Relocate here.
	* Makefile.in (OBJS): Add gimple-expr.o.

From-SVN: r204412