nvptx.c (write_one_arg): Rename to ...
* config/nvptx/nvptx.c (write_one_arg): Rename to ...
(write_arg_mode): ... here. Update callers.
(write_arg): Rename to ...
(write__arg_type): ... here. Update callers.
(write_return_mode): New fn, broken out of ...
(write_return): ... here. Rename to ...
(write_return_type): ... here. Call it. Update callers.
(write_fn_proto_from_insn): Use write_arg_mode and
write_return_mode.
(init_frame): New fn.
(nvptx_declare_function_name): Call it for frame and varargs. Only
emit outgoing static chain, if it's live.
(nvptx_output_return): Use reg_names for return reg name.
(nvptx_output_call_insn): Likewise.
(nvptx_reorg): Mark unused hard regs too.
From-SVN: r231663