[RFC] Fix for PR58201

[Jeff Law]

On 09/04/2013 10:49 AM, Bernd Schmidt wrote:
> On 09/04/2013 06:04 PM, Jan Hubicka wrote:
>> this is third fallout of my change to remove DECL_ARGUMENTS/DECL_RESULT for functions w/o
>> bodies I did not really anticipate.
> [...]
>> I would like to basically ask if it seems to make sense to go this route and
>> try to get rid of those declarations.
>
> I'm currently working on a new target, ptx, which uses a
> pseudo-assembler where functions (even extern ones) need to be declared
> with their arguments and return types. With my current code I have to
> look at DECL_ARGUMENTS fairly late in the compilation. I'm not quite
> sure yet whether the change to delete them will break the backend.
IIRC the PA had similar requirements as well -- in 
ASM_DECLARE_FUNCTION_NAME we have to peek at DECL_ARGUMENTS so we can 
pass to the assembler & linker which registers hold arguments.

Jeff