gcc/
	* rtl.def (REG): Change format to "r".
	* rtl.h (rtunion): Remove rt_reg.
	(reg_info): New structure.
	(rtx_def): Add reg field to main union.
	(X0REGATTR): Delete.
	(REG_CHECK): New macro.
	(SET_REGNO_RAW, rhs_regno, REG_ATTRS): Use it.
	* rtl.c (rtx_format): Document "r".
	(rtx_code_size): Handle REG specially.
	* gengenrtl.c (special_format): Return true for formats
	that include 'r'.
	* gengtype.c (adjust_field_rtx_def): Handle 'r' fields.
	Deal with REG_ATTRS after the field loop.
	* emit-rtl.c (gen_raw_REG): Call rtx_alloc_stat directly.
	* expmed.c (init_expmed): Call gen_raw_REG instead of
	gen_rtx_raw_REG.
	* expr.c (init_expr_target): Likewise.
	* regcprop.c (maybe_mode_change): Likewise.
	* varasm.c (make_decl_rtl): Likewise.
	* final.c (leaf_renumber_regs_insn): Return early after
	handling REGs.
	* genemit.c (gen_exp): Handle 'r' fields.
	* genpeep.c (match_rtx): Likewise.
	* gensupport.c (subst_pattern_match): Likewise.
	(get_alternatives_number, collect_insn_data, alter_predicate_for_insn)
	(alter_constraints, subst_dup): Likewise.
	* read-rtl.c (read_rtx_code): Likewise.
	* print-rtl.c (print_rtx): Likewise.
	* genrecog.c (find_operand, find_matching_operand): Likewise.
	(validate_pattern, match_pattern_2): Likewise.
	(parameter::UINT, rtx_test::REGNO_FIELD): New enum values.
	(rtx_test::regno_field): New function.
	(operator ==, safe_to_hoist_p, transition_parameter_type)
	(parameter_type_string, print_parameter_value)
	(print_nonbool_test, print_test): Handle new enum values.
	* cselib.c (rtx_equal_for_cselib_1): Handle REG specially.
	* lra-constraints.c (operands_match_p): Likewise.

From-SVN: r223339