re PR c++/7188 (Segfault with template class and recursive (incorrect) initalizer list.)

	PR c++/7188.
	* cp-tree.def (CTOR_INITIALIZER): Use one slot, not two.
	* cp-tree.h (emit_base_init): Rename to ....
	(emit_mem_initializers): ... this.
	(expand_member_init): Change prototype.
	* init.c (perform_member_init): Compute explicit, rather than
	requiring it as a parameter.
	(sort_member_init): Rename to ...
	(sort_mem_initializers): ... this.  Process bases and data members
	together.
	(sort_base_init): Remove.
	(emit_base_init): Rename to ...
	(emit_mem_initializers): ... this.
	(expand_aggr_vbase_init_1): Remove.
	(construct_virtual_bases): Rename to ...
	(construct_virtual_base): ... this.
	(expand_member_init): Rework handling of base initializers.
	* method.c (do_build_copy_constructor): Use
	finish_mem_initializers.
	* parse.y (member_init): Adjust calls to expand_member_init.
	* pt.c (tsubst_expr): Simplify CTOR_INITIALIZER case.
	(tsubst_initializer_list): Use expand_member_init.
	* semantics.c (finish_mem_intiailizers): Simplify.

	PR c++/7188.
	* g++.dg/template/meminit1.C: New test.
	* g++.dg/warn/Wreorder-1.C: Likewise.
	* g++.old-deja/g++.mike/warn3.C: Tweak.
	* lib/prune.exp: Ingore "in copy constructor".

From-SVN: r57748

gcc/cp/ChangeLog

+2002-10-02  Mark Mitchell  <mark@codesourcery.com>
+
+	PR c++/7188.
+	* cp-tree.def (CTOR_INITIALIZER): Use one slot, not two.
+	* cp-tree.h (emit_base_init): Rename to ....
+	(emit_mem_initializers): ... this.
+	(expand_member_init): Change prototype.
+	* init.c (perform_member_init): Compute explicit, rather than
+	requiring it as a parameter.
+	(sort_member_init): Rename to ...
+	(sort_mem_initializers): ... this.  Process bases and data members
+	together.
+	(sort_base_init): Remove.
+	(emit_base_init): Rename to ...
+	(emit_mem_initializers): ... this.
+	(expand_aggr_vbase_init_1): Remove.
+	(construct_virtual_bases): Rename to ...
+	(construct_virtual_base): ... this.
+	(expand_member_init): Rework handling of base initializers.
+	* method.c (do_build_copy_constructor): Use
+	finish_mem_initializers.
+	* parse.y (member_init): Adjust calls to expand_member_init.
+	* pt.c (tsubst_expr): Simplify CTOR_INITIALIZER case.
+	(tsubst_initializer_list): Use expand_member_init.
+	* semantics.c (finish_mem_intiailizers): Simplify.
+	
 2002-10-02  Roger Sayle  <roger@eyesopen.com>
 
 	PR optimization/6627

gcc/cp/cp-tree.def

@@ -251,7 +251,7 @@ DEFTREECODE (PSEUDO_DTOR_EXPR, "pseudo_dtor_expr", 'e', 3)
 
 /* CTOR_INITIALIZER is a placeholder in template code for a call to
    setup_vtbl_pointer (and appears in all functions, not just ctors).  */
-DEFTREECODE (CTOR_INITIALIZER, "ctor_initializer", 'e', 2)
+DEFTREECODE (CTOR_INITIALIZER, "ctor_initializer", 'e', 1)
 DEFTREECODE (RETURN_INIT, "return_init", 'e', 2)
 DEFTREECODE (TRY_BLOCK, "try_block", 'e', 2)
 DEFTREECODE (EH_SPEC_BLOCK, "eh_spec_block", 'e', 2)

gcc/cp/cp-tree.h

@@ -3845,8 +3845,8 @@ extern void add_friend                          PARAMS ((tree, tree));
 extern tree do_friend				PARAMS ((tree, tree, tree, tree, tree, enum overload_flags, tree, int));
 
 /* in init.c */
-extern void emit_base_init			PARAMS ((tree, tree));
-extern tree expand_member_init			PARAMS ((tree, tree, tree));
+extern tree expand_member_init			(tree, tree);
+extern void emit_mem_initializers		(tree);
 extern tree build_aggr_init			PARAMS ((tree, tree, int));
 extern tree build_init				PARAMS ((tree, tree, int));
 extern int is_aggr_type				PARAMS ((tree, int));

gcc/cp/method.c

@@ -536,7 +536,6 @@ do_build_copy_constructor (fndecl)
       int n_bases = CLASSTYPE_N_BASECLASSES (current_class_type);
       tree binfos = TYPE_BINFO_BASETYPES (current_class_type);
       tree member_init_list = NULL_TREE;
-      tree base_init_list = NULL_TREE;
       int cvquals = cp_type_quals (TREE_TYPE (parm));
       int i;
 
@@ -550,10 +549,12 @@ do_build_copy_constructor (fndecl)
 	{
 	  tree binfo = TREE_VALUE (t);
 	  
-	  base_init_list = tree_cons (binfo,
+	  member_init_list 
+	    = tree_cons (binfo,
+			 build_tree_list (NULL_TREE,
 					  build_base_path (PLUS_EXPR, parm,
-						       binfo, 1),
-				      base_init_list);
+							   binfo, 1)),
+			 member_init_list);
 	}
 
       for (i = 0; i < n_bases; ++i)
@@ -562,10 +563,12 @@ do_build_copy_constructor (fndecl)
 	  if (TREE_VIA_VIRTUAL (binfo))
 	    continue; 
 
-	  base_init_list = tree_cons (binfo,
+	  member_init_list 
+	    = tree_cons (binfo,
+			 build_tree_list (NULL_TREE,
 					  build_base_path (PLUS_EXPR, parm,
-						       binfo, 1),
-				      base_init_list);
+							   binfo, 1)),
+			 member_init_list);
 	}
 
       for (; fields; fields = TREE_CHAIN (fields))
@@ -609,9 +612,7 @@ do_build_copy_constructor (fndecl)
 	  member_init_list
 	    = tree_cons (field, init, member_init_list);
 	}
-      member_init_list = nreverse (member_init_list);
-      base_init_list = nreverse (base_init_list);
-      emit_base_init (member_init_list, base_init_list);
+      finish_mem_initializers (member_init_list);
     }
 }
 

gcc/cp/parse.y

@@ -981,31 +981,27 @@ member_init:
 		{
 		  if (current_class_name)
 		    pedwarn ("anachronistic old style base class initializer");
-		  $$ = expand_member_init (current_class_ref, NULL_TREE, $2);
+		  $$ = expand_member_init (NULL_TREE, $2);
 		}
 	| LEFT_RIGHT
 		{
 		  if (current_class_name)
 		    pedwarn ("anachronistic old style base class initializer");
-		  $$ = expand_member_init (current_class_ref,
-					   NULL_TREE,
+		  $$ = expand_member_init (NULL_TREE,
 					   void_type_node);
 		}
 	| notype_identifier '(' nonnull_exprlist ')'
-		{ $$ = expand_member_init (current_class_ref, $1, $3); }
+		{ $$ = expand_member_init ($1, $3); }
 	| notype_identifier LEFT_RIGHT
-		{ $$ = expand_member_init (current_class_ref, $1,
-					   void_type_node); }
+		{ $$ = expand_member_init ($1, void_type_node); }
 	| nonnested_type '(' nonnull_exprlist ')'
-		{ $$ = expand_member_init (current_class_ref, $1, $3); }
+		{ $$ = expand_member_init ($1, $3); }
 	| nonnested_type LEFT_RIGHT
-		{ $$ = expand_member_init (current_class_ref, $1,
-					   void_type_node); }
+		{ $$ = expand_member_init ($1, void_type_node); }
 	| typename_sub '(' nonnull_exprlist ')'
-		{ $$ = expand_member_init (current_class_ref, $1, $3); }
+		{ $$ = expand_member_init ($1, $3); }
 	| typename_sub LEFT_RIGHT
-		{ $$ = expand_member_init (current_class_ref, $1,
-					   void_type_node); }
+		{ $$ = expand_member_init ($1, void_type_node); }
         | error
                 { $$ = NULL_TREE; }
 	;

gcc/cp/pt.c

@@ -7369,18 +7369,10 @@ tsubst_expr (t, args, complain, in_decl)
       break;
 
     case CTOR_INITIALIZER:
-      {
-	tree member_init_list;
-	tree base_init_list;
-
       prep_stmt (t);
-	member_init_list
-	  = tsubst_initializer_list (TREE_OPERAND (t, 0), args);
-	base_init_list
-	  = tsubst_initializer_list (TREE_OPERAND (t, 1), args);
-	emit_base_init (member_init_list, base_init_list);
+      finish_mem_initializers (tsubst_initializer_list 
+			       (TREE_OPERAND (t, 0), args));
       break;
-      }
 
     case RETURN_STMT:
       prep_stmt (t);
@@ -10293,8 +10285,7 @@ static tree
 tsubst_initializer_list (t, argvec)
      tree t, argvec;
 {
-  tree first = NULL_TREE;
-  tree *p = &first;
+  tree inits = NULL_TREE;
 
   for (; t; t = TREE_CHAIN (t))
     {
@@ -10312,13 +10303,17 @@ tsubst_initializer_list (t, argvec)
       else if (TREE_CODE (init) == TREE_LIST)
 	for (val = init; val; val = TREE_CHAIN (val))
 	  TREE_VALUE (val) = convert_from_reference (TREE_VALUE (val));
-      else
+      else if (init != void_type_node)
 	init = convert_from_reference (init);
 
-      *p = build_tree_list (decl, init);
-      p = &TREE_CHAIN (*p);
+      init = expand_member_init (decl, init);
+      if (init)
+	{
+	  TREE_CHAIN (init) = inits;
+	  inits = init;
+	}
     }
-  return first;
+  return inits;
 }
 
 /* Set CURRENT_ACCESS_SPECIFIER based on the protection of DECL.  */

gcc/cp/semantics.c

@@ -1094,67 +1094,21 @@ begin_mem_initializers ()
     error ("only constructors take base initializers");
 }
 
-/* The INIT_LIST is a list of mem-initializers, in the order they were
-   written by the user.  The TREE_VALUE of each node is a list of
-   initializers for a particular subobject.  The TREE_PURPOSE is a
-   FIELD_DECL is the initializer is for a non-static data member, and
-   a class type if the initializer is for a base class.  */
+/* The MEM_INITS is a list of mem-initializers, in reverse of the
+   order they were written by the user.  Each node is as for
+   emit_mem_initializers.  */
 
 void
-finish_mem_initializers (init_list)
-     tree init_list;
+finish_mem_initializers (tree mem_inits)
 {
-  tree member_init_list;
-  tree base_init_list;
-  tree last_base_warned_about;
-  tree next; 
-  tree init;
-
-  member_init_list = NULL_TREE;
-  base_init_list = NULL_TREE;
-  last_base_warned_about = NULL_TREE;
-
-  for (init = init_list; init; init = next)
-    {
-      next = TREE_CHAIN (init);
-      if (TREE_CODE (TREE_PURPOSE (init)) == FIELD_DECL)
-	{
-	  TREE_CHAIN (init) = member_init_list;
-	  member_init_list = init;
-
-	  /* We're running through the initializers from right to left
-	     as we process them here.  So, if we see a data member
-	     initializer after we see a base initializer, that
-	     actually means that the base initializer preceded the
-	     data member initializer.  */
-	  if (warn_reorder && last_base_warned_about != base_init_list)
-	    {
-	      tree base;
-
-	      for (base = base_init_list; 
-		   base != last_base_warned_about; 
-		   base = TREE_CHAIN (base))
-		{
-		  warning ("base initializer for `%T'",
-			      TREE_PURPOSE (base));
-		  warning ("   will be re-ordered to precede member initializations");
-		}
-
-	      last_base_warned_about = base_init_list;
-	    }
-	}
-      else
-	{
-	  TREE_CHAIN (init) = base_init_list;
-	  base_init_list = init;
-	}
-    }
+  /* Reorder the MEM_INITS so that they are in the order they appeared
+     in the source program.  */
+  mem_inits = nreverse (mem_inits);
 
   if (processing_template_decl)
-    add_stmt (build_min_nt (CTOR_INITIALIZER,
-			    member_init_list, base_init_list));
+    add_stmt (build_min_nt (CTOR_INITIALIZER, mem_inits));
   else
-    emit_base_init (member_init_list, base_init_list);
+    emit_mem_initializers (mem_inits);
 }
 
 /* Returns the stack of SCOPE_STMTs for the current function.  */

gcc/testsuite/ChangeLog

+2002-10-02  Mark Mitchell  <mark@codesourcery.com>
+
+	PR c++/7188.
+	* g++.dg/template/meminit1.C: New test.
+	* g++.dg/warn/Wreorder-1.C: Likewise.
+	* g++.old-deja/g++.mike/warn3.C: Tweak.
+	* lib/prune.exp: Ingore "in copy constructor".
+
 2002-10-02  Andreas Jaeger  <aj@suse.de>
 
 	* gcc.dg/20020919-1.c, gcc.dg/inline-2.c, gcc.dg/980211-1.c,

gcc/testsuite/g++.dg/template/meminit1.C

+template <class T >
+struct S
+{
+  S() : S() {} // { dg-error "base" }
+};
+
+S<int> s; // { dg-error "instantiated" }

gcc/testsuite/g++.dg/warn/Wreorder-1.C

+// { dg-options "-Wreorder -W" }
+
+struct S {
+  S ();
+};
+
+struct T {
+  T ();
+};
+
+struct U : virtual public S, virtual public T {
+  U () : T (), S () {}     // { dg-warning "" }
+  U (const U&) : S () {}   // { dg-warning "copy" }
+};

gcc/testsuite/g++.old-deja/g++.mike/warn3.C

@@ -7,6 +7,6 @@ public:
 };
 
 class D : public B {
-  int member;
+  int member;		                // WARNING - reordered
   D() : member(0), B(member) { }	// WARNING - reordered
 };

gcc/testsuite/lib/prune.exp

-#   Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc.
+#   Copyright (C) 1997, 1999, 2000, 2002 Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -19,7 +19,7 @@
 proc prune_gcc_output { text } {
     #send_user "Before:$text\n"
 
-    regsub -all "(^|\n)\[^\n\]*: In (function|member|method|constructor|instantiation|program|subroutine|block-data) \[^\n\]*" $text "" text
+    regsub -all "(^|\n)\[^\n\]*: In (function|member|method|(copy )?constructor|instantiation|program|subroutine|block-data) \[^\n\]*" $text "" text
     regsub -all "(^|\n)\[^\n\]*: At (top level|global scope):\[^\n\]*" $text "" text
     regsub -all "(^|\n)collect2: ld returned \[^\n\]*" $text "" text
     regsub -all "(^|\n)Please submit.*instructions\[^\n\]*" $text "" text