CN: add some tests that didn't get committed before

tests/cn/left_shift_const.c

@@ -0,0 +1,10 @@
+
+#define BIT(n) (1UL << (n))
+
+int
+f (int x) {
+  int mask = BIT(12 - 3) - 1;
+
+  return 0;
+}
+

tests/cn/missing_resource.error.c

@@ -0,0 +1,15 @@
+
+/* this is a wrong specification. */
+/* this function doesn't create an integer in memory */
+
+int
+f (int *p, int x)
+/*@ requires x < 12 @*/
+/*@ ensures return < 12 @*/
+/*@ ensures take Resource_From_Nothing = Owned(p) @*/
+{
+  return x;
+}
+
+
+

tests/cn/missing_resource_indirect.error.c

@@ -0,0 +1,22 @@
+
+/* this is a wrong specification. */
+/* this function doesn't create an integer in memory */
+
+/*@
+predicate (integer) Owned_Wrapper (pointer p) {
+  take I = Owned<int>(p);
+  return I;
+}
+@*/
+
+int
+f (int *p, int x)
+/*@ requires x < 12 @*/
+/*@ ensures return < 12 @*/
+/*@ ensures take Resource_From_Nothing = Owned_Wrapper(p) @*/
+{
+  return x;
+}
+
+
+