Don't use lib2funcs.asm on PA

[John David Anglin]

> > +  if (DO_FRAME_NOTES && current_function_calls_eh_return)
> > +    {
> > +      rtx sa = EH_RETURN_STACKADJ_RTX;
> > +      emit_insn (Pmode == SImode
> > +		 ? gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, sa)
> > +		 : gen_adddi3 (stack_pointer_rtx, stack_pointer_rtx, sa));
> > +    }
> >  
> >    /* If we haven't restored %r2 yet (no frame pointer, and a stack
> >       frame greater than 8k), do so now.  */
> 
>  Isn't this doing the wrong thing in case a function calling
>  __builtin_eh_return returns through a regular return path (as
>  _Unwind_RaiseException might do) ?

I will investigate.  This code appears in the rs6000 code.  I think the answer
must be that sa is 0 in a normal return.  In the light of day, this code
appears in the wrong place.  In your code, you appear to subtract the stack
adjustment rather than add it.

>  Avoiding that was the first purpose of introducing an eh_return pattern, but
>  I may well be missing something.

You didn't send you epilogue and eh_return patterns.  Could you?

I have integrated your frame size code into the epilogue for testing, although
it is adjusted to match what appears in hppa_expand_prologue and
compute_frame_size.

Dave
-- 
J. David Anglin                                  dave.anglin@nrc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6605)