[Bug middle-end/47650] wrong output of print_generic_decl() called from a plugin

["rguenther at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47650

--- Comment #22 from rguenther at suse dot de <rguenther at suse dot de> 2011-03-15 16:33:09 UTC ---
On Tue, 15 Mar 2011, joe at mcknight dot de wrote:

> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47650
> 
> --- Comment #21 from joe at mcknight dot de 2011-03-15 16:18:37 UTC ---
> (In reply to comment #19)
> > All looks good to me with your C testcase:
> > 
> > (gdb) call debug_generic_expr (fndecl->common.type)
> > int <T357> (struct 
> > {
> >   double dvar;
> >   int ivar;
> > } *)
> 
> Hm, the function was declared to take a new type "tpdefp", so I was expecting
> the dump to return it like this and not resolve it to whatever it is typedef'ed
> to.
> 
> Compare it to:
> 
> typedef int mytype;
> int myfunc2(mytype var) {
>     return 1;
> };
> 
> which outputs
> 
>   static int myfunc2 (mytype);
> 
> i.e. returns the newly created type as well.

That's by design.

> > (gdb) call debug_generic_expr (fndecl->common.type)
> > void (*Handler) (int, void *) <T352> (void)
> 
> It outputs "static void (*Handler) (int, void *) GetFunctionPointer (void);"
> 
> And this is not C  :-)
> 
> The compiler throws a parse error when I compile a function with the prototype
> that it outputs.

It's not designed to do that.  The functions are for debugging and
diagnostic output only, they are not supposed to generate valid C.

Richard.