decl.c (warn_extern_redeclared_static): Check DECL_ARTIFICIAL...

	* decl.c (warn_extern_redeclared_static): Check DECL_ARTIFICIAL,
	not DECL_BUILT_IN, to determine if a function is internally declared.
	(duplicate_decls): Likewise.  Improve handling of builtins.
	(push_overloaded_decl): Remove special handling of builtins.

	* cp-tree.h (ANON_AGGR_TYPE_P): Use CLASS_TYPE_P.

	* decl.c (grokdeclarator): Pull out decl_constant_value in
	templates, too.

	* class.c (finish_struct, finish_struct_1): Remove 'warn_anon' parm.
	* cp-tree.h, pt.c, semantics.c: Adjust.
	* method.c (largest_union_member): Remove.

From-SVN: r28204

gcc/cp/ChangeLog

 1999-07-20  Jason Merrill  <jason@yorick.cygnus.com>
 
+	* decl.c (warn_extern_redeclared_static): Check DECL_ARTIFICIAL,
+	not DECL_BUILT_IN, to determine if a function is internally declared.
+	(duplicate_decls): Likewise.  Improve handling of builtins.
+	(push_overloaded_decl): Remove special handling of builtins.
+
+	* cp-tree.h (ANON_AGGR_TYPE_P): Use CLASS_TYPE_P.
+
+	* decl.c (grokdeclarator): Pull out decl_constant_value in
+	templates, too.
+
+	* class.c (finish_struct, finish_struct_1): Remove 'warn_anon' parm.
+	* cp-tree.h, pt.c, semantics.c: Adjust.
+	* method.c (largest_union_member): Remove.
+
 	* lang-specs.h (c++-cpp-output): Pass -fpreprocessed.
 
 	* lex.c (token_getch, token_put_back): New fns.

gcc/cp/class.c

@@ -3202,9 +3202,8 @@ add_fields_to_vec (fields, field_vec, idx)
    ATTRIBUTES is the set of decl attributes to be applied, if any.  */
 
 void
-finish_struct_1 (t, warn_anon)
+finish_struct_1 (t)
      tree t;
-     int warn_anon;
 {
   int old;
   enum tree_code code = TREE_CODE (t);
@@ -4279,9 +4278,8 @@ unreverse_member_declarations (t)
 }
 
 tree
-finish_struct (t, attributes, warn_anon)
+finish_struct (t, attributes)
      tree t, attributes;
-     int warn_anon;
 {
   /* Append the fields we need for constructing signature tables.  */
   if (IS_SIGNATURE (t))
@@ -4299,7 +4297,7 @@ finish_struct (t, attributes, warn_anon)
       TYPE_SIZE (t) = integer_zero_node;
     }
   else
-    finish_struct_1 (t, warn_anon);
+    finish_struct_1 (t);
 
   TYPE_BEING_DEFINED (t) = 0;
 

gcc/cp/cp-tree.h

@@ -1848,8 +1848,7 @@ extern int flag_new_for_scope;
    flag for this because "A union for which objects or pointers are
    declared is not an anonymous union" [class.union].  */
 #define ANON_AGGR_TYPE_P(NODE)				\
-  (TYPE_LANG_SPECIFIC (NODE)				\
-   && TYPE_LANG_SPECIFIC (NODE)->type_flags.anon_aggr)
+  (CLASS_TYPE_P (NODE) && TYPE_LANG_SPECIFIC (NODE)->type_flags.anon_aggr)
 #define SET_ANON_AGGR_TYPE_P(NODE)			\
   (TYPE_LANG_SPECIFIC (NODE)->type_flags.anon_aggr = 1)
 
@@ -2763,8 +2762,8 @@ extern void add_method				PROTO((tree, tree *, tree));
 extern int currently_open_class			PROTO((tree));
 extern tree get_vfield_offset			PROTO((tree));
 extern void duplicate_tag_error			PROTO((tree));
-extern tree finish_struct			PROTO((tree, tree, int));
-extern void finish_struct_1			PROTO((tree, int));
+extern tree finish_struct			PROTO((tree, tree));
+extern void finish_struct_1			PROTO((tree));
 extern int resolves_to_fixed_type_p		PROTO((tree, int *));
 extern void init_class_processing		PROTO((void));
 extern int is_empty_class			PROTO((tree));

gcc/cp/decl.c

@@ -3048,8 +3048,7 @@ warn_extern_redeclared_static (newdecl, olddecl)
       if (! (TREE_CODE (newdecl) == FUNCTION_DECL
 	     && olddecl != NULL_TREE
 	     && TREE_CODE (olddecl) == FUNCTION_DECL
-	     && (DECL_BUILT_IN (olddecl)
-		 || DECL_BUILT_IN_NONANSI (olddecl))))
+	     && DECL_ARTIFICIAL (olddecl)))
 	{
 	  cp_pedwarn (IDENTIFIER_IMPLICIT_DECL (name)
 		      ? implicit_extern_static_warning
@@ -3092,44 +3091,58 @@ duplicate_decls (newdecl, olddecl)
  
   /* Check for redeclaration and other discrepancies. */
   if (TREE_CODE (olddecl) == FUNCTION_DECL
-      && DECL_ARTIFICIAL (olddecl)
-      && (DECL_BUILT_IN (olddecl) || DECL_BUILT_IN_NONANSI (olddecl)))
-    {
-      /* If you declare a built-in or predefined function name as static,
-	 the old definition is overridden, but optionally warn this was a
-	 bad choice of name.  Ditto for overloads.  */
-      if (! TREE_PUBLIC (newdecl)
-	  || (TREE_CODE (newdecl) == FUNCTION_DECL
-	      && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl)))
-	{
-	  if (warn_shadow)
-	    cp_warning ("shadowing %s function `%#D'",
-			DECL_BUILT_IN (olddecl) ? "built-in" : "library",
+      && DECL_ARTIFICIAL (olddecl))
+    {
+      if (TREE_CODE (newdecl) != FUNCTION_DECL)
+	{
+	  /* If you declare a built-in or predefined function name as static,
+	     the old definition is overridden, but optionally warn this was a
+	     bad choice of name.  */
+	  if (! TREE_PUBLIC (newdecl))
+	    {
+	      if (warn_shadow)
+		cp_warning ("shadowing %s function `%#D'",
+			    DECL_BUILT_IN (olddecl) ? "built-in" : "library",
+			    olddecl);
+	      /* Discard the old built-in function.  */
+	      return 0;
+	    }
+	  /* If the built-in is not ansi, then programs can override
+	     it even globally without an error.  */
+	  else if (! DECL_BUILT_IN (olddecl))
+	    cp_warning ("library function `%#D' redeclared as non-function `%#D'",
+			olddecl, newdecl);
+	  else
+	    {
+	      cp_error ("declaration of `%#D'", newdecl);
+	      cp_error ("conflicts with built-in declaration `%#D'",
 			olddecl);
-	  /* Discard the old built-in function.  */
+	    }
 	  return 0;
 	}
-      else if (! types_match)
+      else if (!types_match)
 	{
-	  if (TREE_CODE (newdecl) != FUNCTION_DECL)
+	  if ((DECL_LANGUAGE (newdecl) == lang_c
+	       && DECL_LANGUAGE (olddecl) == lang_c)
+	      || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
+			    TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
 	    {
-	      /* If the built-in is not ansi, then programs can override
-		 it even globally without an error.  */
-	      if (! DECL_BUILT_IN (olddecl))
-		cp_warning ("library function `%#D' redeclared as non-function `%#D'",
-			    olddecl, newdecl);
-	      else
+	      /* A near match; override the builtin.  */
+
+	      if (TREE_PUBLIC (newdecl))
 		{
-		  cp_error ("declaration of `%#D'", newdecl);
-		  cp_error ("conflicts with built-in declaration `%#D'",
-			    olddecl);
+		  cp_warning ("new declaration `%#D'", newdecl);
+		  cp_warning ("ambiguates built-in declaration `%#D'",
+			      olddecl);
 		}
-	      return 0;
+	      else if (warn_shadow)
+		cp_warning ("shadowing %s function `%#D'",
+			    DECL_BUILT_IN (olddecl) ? "built-in" : "library",
+			    olddecl);
 	    }
-
-	  cp_warning ("declaration of `%#D'", newdecl);
-	  cp_warning ("conflicts with built-in declaration `%#D'",
-		      olddecl);
+	  else
+	    /* Discard the old built-in function.  */
+	    return 0;
 	}
     }
   else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
@@ -4469,17 +4482,7 @@ push_overloaded_decl (decl, flags)
   int doing_global = (namespace_bindings_p () || !(flags & PUSH_LOCAL));
 
   if (doing_global)
-    {
-      old = namespace_binding (name, DECL_CONTEXT (decl));
-      if (old && TREE_CODE (old) == FUNCTION_DECL
-	  && DECL_ARTIFICIAL (old)
-	  && (DECL_BUILT_IN (old) || DECL_BUILT_IN_NONANSI (old)))
-	{
-	  if (duplicate_decls (decl, old))
-	    return old;
-	  old = NULL_TREE;
-	}
-    }
+    old = namespace_binding (name, DECL_CONTEXT (decl));
   else
     old = lookup_name_current_level (name);
 
@@ -10013,6 +10016,8 @@ grokdeclarator (declarator, declspecs, decl_context, initialized, attrlist)
 		if (TREE_CODE (size) == NOP_EXPR
 		    && TREE_TYPE (size) == TREE_TYPE (TREE_OPERAND (size, 0)))
 		  size = TREE_OPERAND (size, 0);
+		if (TREE_READONLY_DECL_P (size))
+		  size = decl_constant_value (size);
 
 		/* If this involves a template parameter, it will be a
 		   constant at instantiation time, but we don't know
@@ -10048,8 +10053,6 @@ grokdeclarator (declarator, declspecs, decl_context, initialized, attrlist)
 			      dname);
 		    size = integer_one_node;
 		  }
-		if (TREE_READONLY_DECL_P (size))
-		  size = decl_constant_value (size);
 		if (pedantic && integer_zerop (size))
 		  cp_pedwarn ("ANSI C++ forbids zero-size array `%D'", dname);
 		if (TREE_CONSTANT (size))

gcc/cp/method.c

@@ -2180,24 +2180,6 @@ emit_thunk (thunk_fndecl)
 
 /* Code for synthesizing methods which have default semantics defined.  */
 
-/* For the anonymous union in TYPE, return the member that is at least as
-   large as the rest of the members, so we can copy it.  */
-
-static tree
-largest_union_member (type)
-     tree type;
-{
-  tree f, type_size = TYPE_SIZE (type);
-
-  for (f = TYPE_FIELDS (type); f; f = TREE_CHAIN (f))
-    if (simple_cst_equal (DECL_SIZE (f), type_size) == 1)
-      return f;
-
-  /* We should always find one.  */
-  my_friendly_abort (323);
-  return NULL_TREE;
-}
-
 /* Generate code for default X(X&) constructor.  */
 
 static void

gcc/cp/pt.c

@@ -5183,7 +5183,7 @@ instantiate_class_template (type)
   input_filename = DECL_SOURCE_FILE (typedecl);
 
   unreverse_member_declarations (type);
-  finish_struct_1 (type, 0);
+  finish_struct_1 (type);
   CLASSTYPE_GOT_SEMICOLON (type) = 1;
 
   /* Clear this now so repo_template_used is happy.  */

gcc/cp/semantics.c

@@ -1320,7 +1320,6 @@ begin_class_definition (t)
   /* Don't change signatures.  */
   if (! IS_SIGNATURE (t))
     {
-      int needs_writing;
       tree name = TYPE_IDENTIFIER (t);
       
       if (! ANON_AGGRNAME_P (name))
@@ -1464,7 +1463,7 @@ finish_class_definition (t, attributes, semi, pop_scope_p)
     ;
   else
     {
-      t = finish_struct (t, attributes, semi);
+      t = finish_struct (t, attributes);
       if (semi) 
 	note_got_semicolon (t);
     }