1 files changed, 29 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/c-c++-common/Wunused-var-4.c b/gcc-4.9/gcc/testsuite/c-c++-common/Wunused-var-4.c
new file mode 100644
index 000000000..d60c476a4
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/c-c++-common/Wunused-var-4.c
@@ -0,0 +1,29 @@
+/* { dg-do compile } */
+/* { dg-options "-Wunused -W" } */
+
+int
+f1 (unsigned int x)
+{
+  int c = ({ union { unsigned int a; int b; } u; u.a = x; u.b; });
+  return c;
+}
+
+void
+f2 (void)
+{
+  struct S { int i; } a;
+  int b[1];
+  a.i = 1;
+  a.i;				/* { dg-warning "no effect" } */
+  b[0] = 1;
+  b[0];				/* { dg-warning "no effect" } */
+}
+
+void
+f3 (void)
+{
+  struct S { int i; } a;	/* { dg-warning "set but not used" } */
+  int b[1];			/* { dg-warning "set but not used" } */
+  a.i = 1;
+  b[0] = 1;
+}