sparc.c (function_arg_slotno): Handle aggregate types other than record and union types.

	* config/sparc/sparc.c (function_arg_slotno) <BLKmode>: Handle
	aggregate types other than record and union types.
	(function_arg): Likewise.
	(function_arg_pass_by_reference): In 64-bit mode, return 0 for
	small arrays.
	(function_value): In 64-bit mode, return objects that require it
	in FP registers.

From-SVN: r112859