PR middle-end/28865

	* varasm.c (output_constant): Return the number of bytes actually
	emitted.
	(output_constructor_array_range): Update the field size with the
	number of bytes emitted by output_constant.
	(output_constructor_regular_field): Likewise.  Also do not
 	complain if the total number of bytes emitted is now greater
	than the expected fieldpos.
	* output.h (output_constant): Update prototype and descriptive
	comment.

	* gcc.c-torture/compile/pr28865.c: New.
	* gcc.c-torture/execute/pr28865.c: New.

From-SVN: r206661