re PR c++/40749 (g++ doesnt report missing return if return is of type const <type>)

gcc/cp/

2009-07-26  Simon Martin  <simartin@users.sourceforge.net>

	PR c++/40749
	* decl.c (grokdeclarator): Do not set TREE_NO_WARNING for functions
	with a qualified return type.

gcc/testsuite/

2007-07-26  Simon Martin  <simartin@users.sourceforge.net>

	PR c++/40749
	* g++.dg/warn/Wreturn-type-6.C: New test.

From-SVN: r150097

gcc/cp/ChangeLog

+2009-07-26  Simon Martin  <simartin@users.sourceforge.net>
+
+	PR c++/40749
+	* decl.c (grokdeclarator): Do not set TREE_NO_WARNING for functions
+	with a qualified return type.
+
 2009-07-24  Jason Merrill  <jason@redhat.com>
 
 	Core issue 901

gcc/cp/decl.c

@@ -7636,7 +7636,6 @@ grokdeclarator (const cp_declarator *declarator,
   bool unsigned_p, signed_p, short_p, long_p, thread_p;
   bool type_was_error_mark_node = false;
   bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
-  bool set_no_warning = false;
   bool template_type_arg = false;
   const char *errmsg;
 
@@ -8316,7 +8315,6 @@ grokdeclarator (const cp_declarator *declarator,
 		/* We now know that the TYPE_QUALS don't apply to the
 		   decl, but to its return type.  */
 		type_quals = TYPE_UNQUALIFIED;
-		set_no_warning = true;
 	      }
 	    errmsg = targetm.invalid_return_type (type);
 	    if (errmsg)
@@ -9538,9 +9536,6 @@ grokdeclarator (const cp_declarator *declarator,
     if (!processing_template_decl)
       cp_apply_type_quals_to_decl (type_quals, decl);
 
-    if (set_no_warning)
-        TREE_NO_WARNING (decl) = 1;
-
     return decl;
   }
 }

gcc/testsuite/ChangeLog

+2007-07-26  Simon Martin  <simartin@users.sourceforge.net>
+
+	PR c++/40749
+	* g++.dg/warn/Wreturn-type-6.C: New test.
+
 2009-07-26  Ira Rosen  <irar@il.ibm.com>
 
 	PR tree-optimization/40801

gcc/testsuite/g++.dg/warn/Wreturn-type-6.C

+/* PR c++/40749 */
+/* { dg-do "compile" } */
+/* { dg-options "-Wreturn-type" } */
+
+struct A {};
+const A a() {} /* { dg-warning "no return statement" } */
+const A& b() {} /* { dg-warning "no return statement" } */
+
+const int c() {} /* { dg-warning "no return statement" } */
+
+template<class T>
+const int foo(T t) {} /* { dg-warning "no return statement" } */
+int d = foo<int>(0), e = foo<int>(1);