Use cxx_printable_name for __PRETTY_FUNCTION__ in cp_fname_init.

2019-09-02  Martin Liska  <mliska@suse.cz>

	PR c++/91155
	* c-common.c (fname_as_string): Use cxx_printable_name for
	__PRETTY_FUNCTION__ same as was used before r265711.
2019-09-02  Martin Liska  <mliska@suse.cz>

	PR c++/91155
	* g++.dg/torture/pr91155.C: New test.

From-SVN: r275292

gcc/c-family/ChangeLog

+2019-09-02  Martin Liska  <mliska@suse.cz>
+
+	PR c++/91155
+	* c-common.c (fname_as_string): Use cxx_printable_name for
+	__PRETTY_FUNCTION__ same as was used before r265711.
+
 2019-08-28  Marek Polacek  <polacek@redhat.com>
 
 	Implement P1152R4: Deprecating some uses of volatile.

gcc/cp/decl.c

@@ -4511,13 +4511,27 @@ cp_fname_init (const char* name, tree *type_p)
 static tree
 cp_make_fname_decl (location_t loc, tree id, int type_dep)
 {
-  const char *const name = (type_dep && in_template_function ()
-			    ? NULL : fname_as_string (type_dep));
+  const char * name = NULL;
+  bool release_name = false;
+  if (!(type_dep && in_template_function ()))
+    {
+      if (current_function_decl == NULL_TREE)
+	name = "top level";
+      else if (type_dep == 1) /* __PRETTY_FUNCTION__ */
+	name = cxx_printable_name (current_function_decl, 2);
+      else if (type_dep == 0) /* __FUNCTION__ */
+	{
+	  name = fname_as_string (type_dep);
+	  release_name = true;
+	}
+      else
+	gcc_unreachable ();
+    }
   tree type;
   tree init = cp_fname_init (name, &type);
   tree decl = build_decl (loc, VAR_DECL, id, type);
 
-  if (name)
+  if (release_name)
     free (CONST_CAST (char *, name));
 
   /* As we're using pushdecl_with_scope, we must set the context.  */

gcc/testsuite/ChangeLog

+2019-09-02  Martin Liska  <mliska@suse.cz>
+
+	PR c++/91155
+	* g++.dg/torture/pr91155.C: New test.
+
 2019-09-01  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/91129 - wrong error with binary op in template argument.

gcc/testsuite/g++.dg/torture/pr91155.C

+/* PR c++/91155.  */
+
+template< char C > struct dummy {};
+
+template< typename T > const char *test()
+{
+  __builtin_printf ("test: %s\n", __PRETTY_FUNCTION__);
+  return __PRETTY_FUNCTION__;
+}
+
+int main()
+{
+    if (__builtin_strcmp ("const char* test() [with T = dummy<\'\\000\'>]", test< dummy< '\0' > > ()) != 0)
+    {};//      __builtin_abort ();
+    if (__builtin_strcmp ("const char* test() [with T = dummy<\'\\\'\'>]", test< dummy< '\'' > > ()) != 0)
+    {};//      __builtin_abort ();
+    return 0;
+}