On Fri, 3 Jan 2014, Jakub Jelinek wrote:
> On Fri, Jan 03, 2014 at 11:15:32AM +0100, Richard Biener wrote:
> > so if there is a decl then use its type signature, otherwise
> > (indirect calls) use the caller signature (and hope it matches
> > the callee...). That it later falls back to looking at
> > DECL_ARGUMENTS is odd (probably a FE issue where we have a
> > fndecl with a bogus type?)
>
> For K&R C non-prototyped functions
> foo (x, y)
> int x, y;
> {
> return x + y;
> }
> I think TYPE_ARG_TYPES is NULL (?) and DECL_ARGUMENTS is the only way to get
> at the types.
Ah, indeed. A C speciality that shouldn't survive GENERICization if
that's really the case.
I wonder how
int main()
{
return (*(&foo))(0, 0);
}
works though. Or
__auto_type x = foo;
(substitute for that new C __auto thing).
The former probably because we fold away the indirection very early.
Richard.
