* config/m32r/m32r-protos.h (m32r_pass_by_reference): Declare.
	* config/m32r/m32r.c (m32r_pass_by_reference): New fn.
	(m32r_va_arg): Use it.
	* config/m32r/m32r.h (FUNCTION_ARG_PASS_BY_REFERENCE): Ditto.
	(RETURN_IN_MEMORY): Ditto.

Co-Authored-By: Kazuhiro Inaoka <inaoka.kazuhiro@renesas.com>

From-SVN: r67906