1 files changed, 36 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/warn/Wunused-var-12.C b/gcc/testsuite/g++.dg/warn/Wunused-var-12.C
new file mode 100644
index 000000000..3300cbe3d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/warn/Wunused-var-12.C
@@ -0,0 +1,36 @@
+// PR c++/44444
+// { dg-do compile }
+// { dg-options "-Wunused" }
+
+struct S
+{
+  const int &u;
+  const int &v;
+  S (const int &a, const int &b) : u(a), v(b) { }
+};
+
+bool
+f1 ()
+{
+  bool t = false;
+  S z = S (1, 2);
+  t |= z.u == 1;
+  t |= z.v == 2;
+  return t;
+}
+
+void
+f2 ()
+{
+  S z = S (1, 2);
+  z.u;		// { dg-warning "no effect" }
+}
+
+int i;
+
+void
+f3 ()
+{
+  S z = S (1, 2);
+  i++, z.u;	// { dg-warning "no effect" }
+}