[C++] Fix two grokdeclarator locations

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  • [C++] Fix two grokdeclarator locations
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Commit Message

Paolo Carlini Nov. 8, 2018, 9:26 a.m.
Hi,

two additional grokdeclarator locations that we can easily fix by using 
declarator->id_loc. Slightly more interesting, testing revealed a latent 
issue in the make_id_declarator uses: cp_parser_member_declaration 
wasn't setting declarator->id_loc, thus I decided to add a location_t 
parameter to make_id_declarator itself and adjust all the callers. 
Tested x86_64-linux.

Thanks, Paolo.

//////////////
/cp
2018-11-08  Paolo Carlini  <paolo.carlini@oracle.com>

	* parser.c (make_id_declarator): Add location_t parameter.
	(cp_parser_lambda_declarator_opt): Adjust call.
	(cp_parser_decomposition_declaration): Likewise.
	(cp_parser_alias_declaration): Likewise.
	(cp_parser_direct_declarator): Likewise.
	(cp_parser_member_declaration): Likewise.
	(cp_parser_objc_class_ivars): Likewise.
	* decl.c (grokdeclarator): Use declarator->id_loc in two error messages.

/testsuite
2018-11-08  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/cpp0x/nsdmi-union6.C: Test locations too.
	* g++.dg/cpp0x/nsdmi6.C: Likewise.
	* g++.dg/ext/flexary4.C: Likewise.
	* g++.dg/ext/flexary9.C: Likewise.
	* g++.dg/other/incomplete2.C: Likewise.
	* g++.dg/parse/friend12.C: Likewise.

Comments

Paolo Carlini Nov. 12, 2018, 11:39 a.m. | #1
Hi again,

On 08/11/18 10:26, Paolo Carlini wrote:
> Hi,
>
> two additional grokdeclarator locations that we can easily fix by 
> using declarator->id_loc. Slightly more interesting, testing revealed 
> a latent issue in the make_id_declarator uses: 
> cp_parser_member_declaration wasn't setting declarator->id_loc, thus I 
> decided to add a location_t parameter to make_id_declarator itself and 
> adjust all the callers. Tested x86_64-linux.

PS: In my local tree I have the cp_parser_objc_class_ivars change using 
token->location instead of UNKNOWN_LOCATION, thus all the 
make_id_declarator calls should be completely fine location-wise.

Paolo.
Jason Merrill Nov. 14, 2018, 12:30 a.m. | #2
On 11/12/18 6:39 AM, Paolo Carlini wrote:
> Hi again,
> 
> On 08/11/18 10:26, Paolo Carlini wrote:
>> Hi,
>>
>> two additional grokdeclarator locations that we can easily fix by 
>> using declarator->id_loc. Slightly more interesting, testing revealed 
>> a latent issue in the make_id_declarator uses: 
>> cp_parser_member_declaration wasn't setting declarator->id_loc, thus I 
>> decided to add a location_t parameter to make_id_declarator itself and 
>> adjust all the callers. Tested x86_64-linux.
> 
> PS: In my local tree I have the cp_parser_objc_class_ivars change using 
> token->location instead of UNKNOWN_LOCATION, thus all the 
> make_id_declarator calls should be completely fine location-wise.

Great, I was going to ask about that.  Can I see that patch, then?

Jason
Paolo Carlini Nov. 14, 2018, 9:25 a.m. | #3
Hi,

On 14/11/18 01:30, Jason Merrill wrote:
> On 11/12/18 6:39 AM, Paolo Carlini wrote:
>> Hi again,
>>
>> On 08/11/18 10:26, Paolo Carlini wrote:
>>> Hi,
>>>
>>> two additional grokdeclarator locations that we can easily fix by 
>>> using declarator->id_loc. Slightly more interesting, testing 
>>> revealed a latent issue in the make_id_declarator uses: 
>>> cp_parser_member_declaration wasn't setting declarator->id_loc, thus 
>>> I decided to add a location_t parameter to make_id_declarator itself 
>>> and adjust all the callers. Tested x86_64-linux.
>>
>> PS: In my local tree I have the cp_parser_objc_class_ivars change 
>> using token->location instead of UNKNOWN_LOCATION, thus all the 
>> make_id_declarator calls should be completely fine location-wise.
> Great, I was going to ask about that.  Can I see that patch, then?

Thanks, well I didn't post it because it is a trivial incremental change 
vs the posted one. Attached.

Paolo.

//////////////////
Index: cp/decl.c
===================================================================
--- cp/decl.c	(revision 265869)
+++ cp/decl.c	(working copy)
@@ -12408,8 +12408,9 @@ grokdeclarator (const cp_declarator *declarator,
 	      {
 		if (unqualified_id)
 		  {
-		    error ("field %qD has incomplete type %qT",
-			   unqualified_id, type);
+		    error_at (declarator->id_loc,
+			      "field %qD has incomplete type %qT",
+			      unqualified_id, type);
 		    cxx_incomplete_type_inform (strip_array_types (type));
 		  }
 		else
@@ -12423,8 +12424,9 @@ grokdeclarator (const cp_declarator *declarator,
 	  {
 	    if (friendp)
 	      {
-		error ("%qE is neither function nor member function; "
-		       "cannot be declared friend", unqualified_id);
+		error_at (declarator->id_loc,
+			  "%qE is neither function nor member function; "
+			  "cannot be declared friend", unqualified_id);
 		return error_mark_node;
 	      }
 	    decl = NULL_TREE;
Index: cp/parser.c
===================================================================
--- cp/parser.c	(revision 265869)
+++ cp/parser.c	(working copy)
@@ -1452,7 +1452,7 @@ make_declarator (cp_declarator_kind kind)
 
 static cp_declarator *
 make_id_declarator (tree qualifying_scope, tree unqualified_name,
-		    special_function_kind sfk)
+		    special_function_kind sfk, location_t id_location)
 {
   cp_declarator *declarator;
 
@@ -1477,7 +1477,8 @@ make_id_declarator (tree qualifying_scope, tree un
   declarator->u.id.qualifying_scope = qualifying_scope;
   declarator->u.id.unqualified_name = unqualified_name;
   declarator->u.id.sfk = sfk;
-  
+  declarator->id_loc = id_location;
+
   return declarator;
 }
 
@@ -10666,7 +10667,8 @@ cp_parser_lambda_declarator_opt (cp_parser* parser
 
     p = obstack_alloc (&declarator_obstack, 0);
 
-    declarator = make_id_declarator (NULL_TREE, call_op_identifier, sfk_none);
+    declarator = make_id_declarator (NULL_TREE, call_op_identifier, sfk_none,
+				     LAMBDA_EXPR_LOCATION (lambda_expr));
 
     quals = (LAMBDA_EXPR_MUTABLE_P (lambda_expr)
 	     ? TYPE_UNQUALIFIED : TYPE_QUAL_CONST);
@@ -10677,7 +10679,6 @@ cp_parser_lambda_declarator_opt (cp_parser* parser
 				       exception_spec,
                                        return_type,
                                        /*requires_clause*/NULL_TREE);
-    declarator->id_loc = LAMBDA_EXPR_LOCATION (lambda_expr);
     declarator->std_attributes = attributes;
 
     fco = grokmethod (&return_type_specs,
@@ -13443,10 +13444,13 @@ cp_parser_decomposition_declaration (cp_parser *pa
   FOR_EACH_VEC_ELT (v, i, e)
     {
       if (i == 0)
-	declarator = make_id_declarator (NULL_TREE, e.get_value (), sfk_none);
+	declarator = make_id_declarator (NULL_TREE, e.get_value (),
+					 sfk_none, e.get_location ());
       else
-	declarator->u.id.unqualified_name = e.get_value ();
-      declarator->id_loc = e.get_location ();
+	{
+	  declarator->u.id.unqualified_name = e.get_value ();
+	  declarator->id_loc = e.get_location ();
+	}
       tree elt_pushed_scope;
       tree decl2 = start_decl (declarator, &decl_specs, SD_INITIALIZED,
 			       NULL_TREE, NULL_TREE, &elt_pushed_scope);
@@ -19264,8 +19268,7 @@ cp_parser_alias_declaration (cp_parser* parser)
 					       /*declarator=*/NULL))
     return error_mark_node;
 
-  declarator = make_id_declarator (NULL_TREE, id, sfk_none);
-  declarator->id_loc = id_location;
+  declarator = make_id_declarator (NULL_TREE, id, sfk_none, id_location);
 
   member_p = at_class_scope_p ();
   if (member_p)
@@ -20669,9 +20672,8 @@ cp_parser_direct_declarator (cp_parser* parser,
 	      }
 	    declarator = make_id_declarator (qualifying_scope,
 					     unqualified_name,
-					     sfk);
+					     sfk, token->location);
 	    declarator->std_attributes = attrs;
-	    declarator->id_loc = token->location;
 	    declarator->parameter_pack_p = pack_expansion_p;
 
 	    if (pack_expansion_p)
@@ -23963,6 +23965,8 @@ cp_parser_member_declaration (cp_parser* parser)
 	      tree identifier;
 	      tree width;
 	      tree late_attributes = NULL_TREE;
+	      location_t id_location
+		= cp_lexer_peek_token (parser->lexer)->location;
 
 	      if (named_bitfld)
 		identifier = cp_parser_identifier (parser);
@@ -24031,7 +24035,8 @@ cp_parser_member_declaration (cp_parser* parser)
 	      decl = grokbitfield (identifier
 				   ? make_id_declarator (NULL_TREE,
 							 identifier,
-							 sfk_none)
+							 sfk_none,
+							 id_location)
 				   : NULL,
 				   &decl_specifiers,
 				   width, initializer,
@@ -30585,7 +30590,7 @@ cp_parser_objc_class_ivars (cp_parser* parser)
 	      /* Get the name of the bitfield.  */
 	      declarator = make_id_declarator (NULL_TREE,
 					       cp_parser_identifier (parser),
-					       sfk_none);
+					       sfk_none, token->location);
 
 	     eat_colon:
 	      cp_lexer_consume_token (parser->lexer);  /* Eat ':'.  */
Index: testsuite/g++.dg/cpp0x/nsdmi-union6.C
===================================================================
--- testsuite/g++.dg/cpp0x/nsdmi-union6.C	(revision 265869)
+++ testsuite/g++.dg/cpp0x/nsdmi-union6.C	(working copy)
@@ -5,7 +5,7 @@ struct F;          // { dg-message "forward declar
 
 union U            // { dg-message "not complete" }
 {
-  U u[1] = { 0 };  // { dg-error "incomplete type" }
+  U u[1] = { 0 };  // { dg-error "5:field .u. has incomplete type" }
 };
 
 template<typename T>
@@ -18,13 +18,13 @@ template union UT<int>;
 
 union UF
 {
-  F u[1] = { 0 };  // { dg-error "incomplete type" }
+  F u[1] = { 0 };  // { dg-error "5:field .u. has incomplete type" }
 };
 
 template<typename T>
 union UFT
 {
-  F u[1] = { 0 };  // { dg-error "incomplete type" }
+  F u[1] = { 0 };  // { dg-error "5:field .u. has incomplete type" }
 };
 
 template union UFT<int>;
@@ -31,7 +31,7 @@ template union UFT<int>;
 
 struct S           // { dg-message "not complete" }
 {
-  S s[1] = { 0 };  // { dg-error "incomplete type" }
+  S s[1] = { 0 };  // { dg-error "5:field .s. has incomplete type" }
 };
 
 template<typename T>
@@ -44,13 +44,13 @@ template class ST<int>;
 
 struct SF
 {
-  F s[1] = { 0 };  // { dg-error "incomplete type" }
+  F s[1] = { 0 };  // { dg-error "5:field .s. has incomplete type" }
 };
 
 template<typename T>
 struct SFT
 {
-  F s[1] = { 0 };  // { dg-error "incomplete type" }
+  F s[1] = { 0 };  // { dg-error "5:field .s. has incomplete type" }
 };
 
 template class SFT<int>;
Index: testsuite/g++.dg/cpp0x/nsdmi6.C
===================================================================
--- testsuite/g++.dg/cpp0x/nsdmi6.C	(revision 265869)
+++ testsuite/g++.dg/cpp0x/nsdmi6.C	(working copy)
@@ -4,5 +4,6 @@
 struct A
 {
     typedef int int T; // { dg-error "two or more data types in declaration" }
-    struct T x[1] = { 0 }; // { dg-error "incomplete type|forward" }
+    struct T x[1] = { 0 }; // { dg-error "14:field .x. has incomplete type" }
+// { dg-message "forward declaration" "" { target c++11 } .-1 }  
 };
Index: testsuite/g++.dg/ext/flexary4.C
===================================================================
--- testsuite/g++.dg/ext/flexary4.C	(revision 265869)
+++ testsuite/g++.dg/ext/flexary4.C	(working copy)
@@ -143,7 +143,7 @@ struct Sx23 {
 
 struct Sx24 {
   struct S;
-  S a_x [];                 // { dg-error "incomplete type" }
+  S a_x [];                 // { dg-error "5:field .a_x. has incomplete type" }
 };
 
 struct Sx25 {
Index: testsuite/g++.dg/ext/flexary9.C
===================================================================
--- testsuite/g++.dg/ext/flexary9.C	(revision 265869)
+++ testsuite/g++.dg/ext/flexary9.C	(working copy)
@@ -136,7 +136,8 @@ struct Sx23 {
 // array warning.
 struct Sx24 {
   struct S;
-  S a_x [0];                // { dg-message "incomplete type|zero-size array" }
+  S a_x [0];                // { dg-error "5:field .a_x. has incomplete type" }
+// { dg-warning "zero-size array" "" { target *-*-* } .-1 }
 };
 
 struct Sx25 {
Index: testsuite/g++.dg/other/incomplete2.C
===================================================================
--- testsuite/g++.dg/other/incomplete2.C	(revision 265869)
+++ testsuite/g++.dg/other/incomplete2.C	(working copy)
@@ -5,7 +5,7 @@ struct A;
 
 struct B
 {
-  A a : 1;  // { dg-error "incomplete" }
+  A a : 1;  // { dg-error "5:field .a. has incomplete type .A" }
 };
 
 struct S
Index: testsuite/g++.dg/parse/friend12.C
===================================================================
--- testsuite/g++.dg/parse/friend12.C	(revision 265869)
+++ testsuite/g++.dg/parse/friend12.C	(working copy)
@@ -2,5 +2,5 @@
 
 struct A
 {
-  friend int i = 0;  // { dg-error "cannot be declared friend" }
+  friend int i = 0;  // { dg-error "14:.i. is neither function nor member function; cannot be declared friend" }
 };
Jason Merrill Nov. 14, 2018, 3:32 p.m. | #4
OK.
On Wed, Nov 14, 2018 at 4:26 AM Paolo Carlini <paolo.carlini@oracle.com> wrote:
>
> Hi,
>
> On 14/11/18 01:30, Jason Merrill wrote:
> > On 11/12/18 6:39 AM, Paolo Carlini wrote:
> >> Hi again,
> >>
> >> On 08/11/18 10:26, Paolo Carlini wrote:
> >>> Hi,
> >>>
> >>> two additional grokdeclarator locations that we can easily fix by
> >>> using declarator->id_loc. Slightly more interesting, testing
> >>> revealed a latent issue in the make_id_declarator uses:
> >>> cp_parser_member_declaration wasn't setting declarator->id_loc, thus
> >>> I decided to add a location_t parameter to make_id_declarator itself
> >>> and adjust all the callers. Tested x86_64-linux.
> >>
> >> PS: In my local tree I have the cp_parser_objc_class_ivars change
> >> using token->location instead of UNKNOWN_LOCATION, thus all the
> >> make_id_declarator calls should be completely fine location-wise.
> > Great, I was going to ask about that.  Can I see that patch, then?
>
> Thanks, well I didn't post it because it is a trivial incremental change
> vs the posted one. Attached.
>
> Paolo.
>
> //////////////////
>

Patch

Index: cp/decl.c
===================================================================
--- cp/decl.c	(revision 265869)
+++ cp/decl.c	(working copy)
@@ -12408,8 +12408,9 @@  grokdeclarator (const cp_declarator *declarator,
 	      {
 		if (unqualified_id)
 		  {
-		    error ("field %qD has incomplete type %qT",
-			   unqualified_id, type);
+		    error_at (declarator->id_loc,
+			      "field %qD has incomplete type %qT",
+			      unqualified_id, type);
 		    cxx_incomplete_type_inform (strip_array_types (type));
 		  }
 		else
@@ -12423,8 +12424,9 @@  grokdeclarator (const cp_declarator *declarator,
 	  {
 	    if (friendp)
 	      {
-		error ("%qE is neither function nor member function; "
-		       "cannot be declared friend", unqualified_id);
+		error_at (declarator->id_loc,
+			  "%qE is neither function nor member function; "
+			  "cannot be declared friend", unqualified_id);
 		return error_mark_node;
 	      }
 	    decl = NULL_TREE;
Index: cp/parser.c
===================================================================
--- cp/parser.c	(revision 265869)
+++ cp/parser.c	(working copy)
@@ -1452,7 +1452,7 @@  make_declarator (cp_declarator_kind kind)
 
 static cp_declarator *
 make_id_declarator (tree qualifying_scope, tree unqualified_name,
-		    special_function_kind sfk)
+		    special_function_kind sfk, location_t id_location)
 {
   cp_declarator *declarator;
 
@@ -1477,7 +1477,8 @@  make_id_declarator (tree qualifying_scope, tree un
   declarator->u.id.qualifying_scope = qualifying_scope;
   declarator->u.id.unqualified_name = unqualified_name;
   declarator->u.id.sfk = sfk;
-  
+  declarator->id_loc = id_location;
+
   return declarator;
 }
 
@@ -10666,7 +10667,8 @@  cp_parser_lambda_declarator_opt (cp_parser* parser
 
     p = obstack_alloc (&declarator_obstack, 0);
 
-    declarator = make_id_declarator (NULL_TREE, call_op_identifier, sfk_none);
+    declarator = make_id_declarator (NULL_TREE, call_op_identifier, sfk_none,
+				     LAMBDA_EXPR_LOCATION (lambda_expr));
 
     quals = (LAMBDA_EXPR_MUTABLE_P (lambda_expr)
 	     ? TYPE_UNQUALIFIED : TYPE_QUAL_CONST);
@@ -10677,7 +10679,6 @@  cp_parser_lambda_declarator_opt (cp_parser* parser
 				       exception_spec,
                                        return_type,
                                        /*requires_clause*/NULL_TREE);
-    declarator->id_loc = LAMBDA_EXPR_LOCATION (lambda_expr);
     declarator->std_attributes = attributes;
 
     fco = grokmethod (&return_type_specs,
@@ -13443,10 +13444,13 @@  cp_parser_decomposition_declaration (cp_parser *pa
   FOR_EACH_VEC_ELT (v, i, e)
     {
       if (i == 0)
-	declarator = make_id_declarator (NULL_TREE, e.get_value (), sfk_none);
+	declarator = make_id_declarator (NULL_TREE, e.get_value (),
+					 sfk_none, e.get_location ());
       else
-	declarator->u.id.unqualified_name = e.get_value ();
-      declarator->id_loc = e.get_location ();
+	{
+	  declarator->u.id.unqualified_name = e.get_value ();
+	  declarator->id_loc = e.get_location ();
+	}
       tree elt_pushed_scope;
       tree decl2 = start_decl (declarator, &decl_specs, SD_INITIALIZED,
 			       NULL_TREE, NULL_TREE, &elt_pushed_scope);
@@ -19264,8 +19268,7 @@  cp_parser_alias_declaration (cp_parser* parser)
 					       /*declarator=*/NULL))
     return error_mark_node;
 
-  declarator = make_id_declarator (NULL_TREE, id, sfk_none);
-  declarator->id_loc = id_location;
+  declarator = make_id_declarator (NULL_TREE, id, sfk_none, id_location);
 
   member_p = at_class_scope_p ();
   if (member_p)
@@ -20669,9 +20672,8 @@  cp_parser_direct_declarator (cp_parser* parser,
 	      }
 	    declarator = make_id_declarator (qualifying_scope,
 					     unqualified_name,
-					     sfk);
+					     sfk, token->location);
 	    declarator->std_attributes = attrs;
-	    declarator->id_loc = token->location;
 	    declarator->parameter_pack_p = pack_expansion_p;
 
 	    if (pack_expansion_p)
@@ -23963,6 +23965,8 @@  cp_parser_member_declaration (cp_parser* parser)
 	      tree identifier;
 	      tree width;
 	      tree late_attributes = NULL_TREE;
+	      location_t id_location
+		= cp_lexer_peek_token (parser->lexer)->location;
 
 	      if (named_bitfld)
 		identifier = cp_parser_identifier (parser);
@@ -24031,7 +24035,8 @@  cp_parser_member_declaration (cp_parser* parser)
 	      decl = grokbitfield (identifier
 				   ? make_id_declarator (NULL_TREE,
 							 identifier,
-							 sfk_none)
+							 sfk_none,
+							 id_location)
 				   : NULL,
 				   &decl_specifiers,
 				   width, initializer,
@@ -30585,7 +30590,7 @@  cp_parser_objc_class_ivars (cp_parser* parser)
 	      /* Get the name of the bitfield.  */
 	      declarator = make_id_declarator (NULL_TREE,
 					       cp_parser_identifier (parser),
-					       sfk_none);
+					       sfk_none, UNKNOWN_LOCATION);
 
 	     eat_colon:
 	      cp_lexer_consume_token (parser->lexer);  /* Eat ':'.  */
Index: testsuite/g++.dg/cpp0x/nsdmi-union6.C
===================================================================
--- testsuite/g++.dg/cpp0x/nsdmi-union6.C	(revision 265869)
+++ testsuite/g++.dg/cpp0x/nsdmi-union6.C	(working copy)
@@ -5,7 +5,7 @@  struct F;          // { dg-message "forward declar
 
 union U            // { dg-message "not complete" }
 {
-  U u[1] = { 0 };  // { dg-error "incomplete type" }
+  U u[1] = { 0 };  // { dg-error "5:field .u. has incomplete type" }
 };
 
 template<typename T>
@@ -18,13 +18,13 @@  template union UT<int>;
 
 union UF
 {
-  F u[1] = { 0 };  // { dg-error "incomplete type" }
+  F u[1] = { 0 };  // { dg-error "5:field .u. has incomplete type" }
 };
 
 template<typename T>
 union UFT
 {
-  F u[1] = { 0 };  // { dg-error "incomplete type" }
+  F u[1] = { 0 };  // { dg-error "5:field .u. has incomplete type" }
 };
 
 template union UFT<int>;
@@ -31,7 +31,7 @@  template union UFT<int>;
 
 struct S           // { dg-message "not complete" }
 {
-  S s[1] = { 0 };  // { dg-error "incomplete type" }
+  S s[1] = { 0 };  // { dg-error "5:field .s. has incomplete type" }
 };
 
 template<typename T>
@@ -44,13 +44,13 @@  template class ST<int>;
 
 struct SF
 {
-  F s[1] = { 0 };  // { dg-error "incomplete type" }
+  F s[1] = { 0 };  // { dg-error "5:field .s. has incomplete type" }
 };
 
 template<typename T>
 struct SFT
 {
-  F s[1] = { 0 };  // { dg-error "incomplete type" }
+  F s[1] = { 0 };  // { dg-error "5:field .s. has incomplete type" }
 };
 
 template class SFT<int>;
Index: testsuite/g++.dg/cpp0x/nsdmi6.C
===================================================================
--- testsuite/g++.dg/cpp0x/nsdmi6.C	(revision 265869)
+++ testsuite/g++.dg/cpp0x/nsdmi6.C	(working copy)
@@ -4,5 +4,6 @@ 
 struct A
 {
     typedef int int T; // { dg-error "two or more data types in declaration" }
-    struct T x[1] = { 0 }; // { dg-error "incomplete type|forward" }
+    struct T x[1] = { 0 }; // { dg-error "14:field .x. has incomplete type" }
+// { dg-message "forward declaration" "" { target c++11 } .-1 }  
 };
Index: testsuite/g++.dg/ext/flexary4.C
===================================================================
--- testsuite/g++.dg/ext/flexary4.C	(revision 265869)
+++ testsuite/g++.dg/ext/flexary4.C	(working copy)
@@ -143,7 +143,7 @@  struct Sx23 {
 
 struct Sx24 {
   struct S;
-  S a_x [];                 // { dg-error "incomplete type" }
+  S a_x [];                 // { dg-error "5:field .a_x. has incomplete type" }
 };
 
 struct Sx25 {
Index: testsuite/g++.dg/ext/flexary9.C
===================================================================
--- testsuite/g++.dg/ext/flexary9.C	(revision 265869)
+++ testsuite/g++.dg/ext/flexary9.C	(working copy)
@@ -136,7 +136,8 @@  struct Sx23 {
 // array warning.
 struct Sx24 {
   struct S;
-  S a_x [0];                // { dg-message "incomplete type|zero-size array" }
+  S a_x [0];                // { dg-error "5:field .a_x. has incomplete type" }
+// { dg-warning "zero-size array" "" { target *-*-* } .-1 }
 };
 
 struct Sx25 {
Index: testsuite/g++.dg/other/incomplete2.C
===================================================================
--- testsuite/g++.dg/other/incomplete2.C	(revision 265869)
+++ testsuite/g++.dg/other/incomplete2.C	(working copy)
@@ -5,7 +5,7 @@  struct A;
 
 struct B
 {
-  A a : 1;  // { dg-error "incomplete" }
+  A a : 1;  // { dg-error "5:field .a. has incomplete type .A" }
 };
 
 struct S
Index: testsuite/g++.dg/parse/friend12.C
===================================================================
--- testsuite/g++.dg/parse/friend12.C	(revision 265869)
+++ testsuite/g++.dg/parse/friend12.C	(working copy)
@@ -2,5 +2,5 @@ 
 
 struct A
 {
-  friend int i = 0;  // { dg-error "cannot be declared friend" }
+  friend int i = 0;  // { dg-error "14:.i. is neither function nor member function; cannot be declared friend" }
 };