rs6000.c (function_arg): Always split vectors for e500 if it's a stdarg function.

rs6000.c (function_arg): Always split vectors for e500 if it's a stdarg function.

2003-06-12  Aldy Hernandez  <aldyh@redhat.com>

	* config/rs6000/rs6000.c (function_arg): Always split vectors for
	e500 if it's a stdarg function.
	(function_arg_advance): Advance 2 registers for vectors in a
	stdarg function.
	(init_cumulative_args): Initialize stdarg.
	(rs6000_spe_function_arg): New.

	* config/rs6000/rs6000.h (rs6000_args): Add stdarg.

From-SVN: r67854