[Bug inline-asm/54450] Extended asm in global scope

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54450

Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|DUPLICATE                   |INVALID

--- Comment #8 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Georg-Johann Lay from comment #7)
> (In reply to Eric Gallager from comment #6)
> > (In reply to Marek Polacek from comment #2)
> > > Probably dup of http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41045
> > 
> > Agreed, closing as a duplicate of it
> > 
> > *** This bug has been marked as a duplicate of bug 41045 ***
> 
> Really?
> 
> What the OP wants is
> 
> >> void *ptr;
> >>
> >>   __asm__ ("my_function:\n\t"
> >>            "jmp *%0\n\t" : : "r"(ptr));
> 
> Constraint "r" cannot work at toplevel, hence this PR is invalid.
> 
> What PR41045 is about is top-level asm arguments that are compiler-time
> constants (constraint "n") and maybe also symbols (constraints "i" and "s").
> 
> So the initial request is only valid if the address of ptr was used (and
> &ptr is CONST_INT, CONST or SYMBOL_REF etc.):
> 
> void *ptr;
> 
> __asm__ ("my_function:\n\t"
>          "jmp ??? %0" : : "i" (&ptr));

Oh OK, changing to INVALID then.