i386.c (ix86_decompose_address): Use REG_P instead of ix86_address_subreg_operand.

i386.c (ix86_decompose_address): Use REG_P instead of ix86_address_subreg_operand.

	* config/i386/i386.c (ix86_decompose_address): Use REG_P instead of
	ix86_address_subreg_operand.  Move subreg checks to
	ix86_validate_address_register.  Move address override check to
	ix86_legitimate_address_p.
	(ix86_validate_address_register): New function.
	(ix86_legitimate_address_p): Call ix86_validate_address_register
	to validate base and index registers.  Add address override check
	from ix86_decompose_address.
	(ix86_decompose_address): Remove.

From-SVN: r204976