commit 00eeabd8273ce6dca5d2ccba45b302119cd798e6
Author: Jason Merrill <jason@redhat.com>
Date: Fri Jan 13 14:27:04 2012 -0500
PR c++/20681
* semantics.c (finish_break_stmt): Avoid adding an unreachable
BREAK_STMT.
@@ -995,6 +995,15 @@ finish_range_for_decl (tree range_for_stmt, tree decl, tree expr)
tree
finish_break_stmt (void)
{
+ /* In switch statements break is sometimes stylistically used after
+ a return statement. This can lead to spurious warnings about
+ control reaching the end of a non-void function when it is
+ inlined. Note that we are calling block_may_fallthru with
+ language specific tree nodes; this works because
+ block_may_fallthru returns true when given something it does not
+ understand. */
+ if (!block_may_fallthru (cur_stmt_list))
+ return void_zero_node;
return add_stmt (build_stmt (input_location, BREAK_STMT));
}
new file mode 100644
@@ -0,0 +1,16 @@
+// PR c++/20681
+// { dg-options -Wreturn-type }
+
+struct a{~a();a();};
+int GetMetaCombination (int a2)
+{
+ a bi;
+ switch (a2)
+ {
+ case 1:
+ return 18;
+ break;//removing this works around the warning
+ default:
+ return 0;
+ }
+}