nvptx.h (RETURN_ADDR_REGNO): Delete.

nvptx.h (RETURN_ADDR_REGNO): Delete.

	* config/nvptx/nvptx.h (RETURN_ADDR_REGNO): Delete.
	(OUTGOING_ARG_POINTER_REGNUM): Delete.
	(ASM_OUTPUT_COMMON, ASM_OUTPUT_LOCAL): Delete.
	(REGISTER_NAMES): Name static chain regs.
	* config/nvptx/nvptx.c (nvptx_function_arg): Add ARG_UNUSED, merge
	ifs.
	(nvptx_incoming_arg): Merge ifs.
	(nvptx_function_arg_boundary): Reimplement to avoid mixing units.
	(nvptx_function_value): Tail call nvptx_libcall_value.
	(nvptx_pass_by_reference): Add ARG_UNUSED.
	(nvptx_static_chain): Use conditional op.
	(nvptx_handle_kernel_attribute): Use VOID_TYPE_P.

From-SVN: r231572