1 files changed, 57 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/warn/Walways-true-1.C b/gcc/testsuite/g++.dg/warn/Walways-true-1.C
new file mode 100644
index 000000000..ae6f9dc83
--- /dev/null
+++ b/gcc/testsuite/g++.dg/warn/Walways-true-1.C
@@ -0,0 +1,57 @@
+// Test -Waddress for testing an address against NULL.
+// Origin: Ian Lance Taylor <iant@google.com>
+
+// { dg-do compile }
+// { dg-options "-Waddress" }
+
+extern int foo (int);
+
+int i;
+
+void
+bar (int a)
+{
+ lab:
+  if (foo)	// { dg-warning "always evaluate as" "correct warning" }
+    foo (0);
+  if (foo (1))
+    ;
+  if (&i)	// { dg-warning "always evaluate as" "correct warning" }
+    foo (2);
+  if (i)
+    foo (3);
+  if (&a)	// { dg-warning "always evaluate as" "correct warning" }
+    foo (4);
+  if (a)
+    foo (5);
+  if (&&lab)	// { dg-warning "always evaluate as" "correct warning" }
+    foo (6);
+  if (foo == 0)	// { dg-warning "never be NULL" "correct warning" }
+    foo (7);
+  if (foo (1) == 0)
+    foo (8);
+  if (&i == 0)	// { dg-warning "never be NULL" "correct warning" }
+    foo (9);
+  if (i == 0)
+    foo (10);
+  if (&a == 0)	// { dg-warning "never be NULL" "correct warning" }
+    foo (11);
+  if (a == 0)
+    foo (12);
+  if (&&lab == 0) // { dg-warning "never be NULL" "correct warning" }
+    foo (13);
+  if (0 == foo)	// { dg-warning "never be NULL" "correct warning" }
+    foo (14);
+  if (0 == foo (1))
+    foo (15);
+  if (0 == &i)	// { dg-warning "never be NULL" "correct warning" }
+    foo (16);
+  if (0 == i)
+    foo (17);
+  if (0 == &a)	// { dg-warning "never be NULL" "correct warning" }
+    foo (18);
+  if (0 == a)
+    foo (19);
+  if (0 == &&lab) // { dg-warning "never be NULL" "correct warning" }
+    foo (20);
+}