i386.md (R8_REG, R9_REG): New constants.

i386.md (R8_REG, R9_REG): New constants.

	* config/i386/i386.md (R8_REG, R9_REG): New constants.
	* config/i386/i386.h (CONDITIONAL_REGISTER_USAGE): Use named
	constants instead of magic numbers.
	(HARD_REGNO_CALLER_SAVE_MODE): Ditto.
	(QI_REG_P): Ditto.
	* config/i386/i386.c (x86_64_int_parameter_registers): Ditto.
	(x86_64_ms_abi_int_parameter_registers): Ditto.
	(x86_64_int_return_registers): Ditto.
	(ix86_expand_call): Ditto for clobbered_registers array.
	(ix86_hard_regno_mode_ok): Ditto.
	(x86_extended_QIreg_mentioned_p): Ditto.

From-SVN: r144638