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From: "gaius at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug modula2/108183] wrong code generated in the modula2 scaffold
 mechanism
Date: Tue, 20 Dec 2022 21:24:30 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108183

--- Comment #11 from Gaius Mulley <gaius at gcc dot gnu.org> ---
Many thanks for the analysis.  Taking your idea and assuming
that Sym 6114 is a procedure then I think the correction is:

PROCEDURE IsExternal (sym: CARDINAL) : BOOLEAN ;
VAR
   mod: CARDINAL ;
BEGIN
   (* new code starts here.  *)
   IF IsProcedure (sym) AND IsExtern (sym)
   THEN
      RETURN TRUE
   END ;
   (* end of new code.  *)
   mod :=3D GetScope(sym) ;
   REPEAT
      IF mod=3DNulSym
      THEN
         RETURN( FALSE )
      ELSIF IsDefImp(mod)
      THEN
         RETURN( mod#GetMainModule() )
      END ;
      mod :=3D GetScope(mod)
   UNTIL mod=3DNulSym ;
   RETURN( FALSE )
END IsExternal ;


In gcc/m2/gm2-compiler/SymbolTable.mod procedures can be queried as IsExter=
n.
The ctors are special case created in gcc/m2/gm2-compiler/M2Scaffold.mod.
It looks as if the special case might not have been tested in IsExternal.=