Add existing warnings to -Waddress so that it works closer to what GCC has.
Previously, -Waddress was empty.

Fixes PR9043.

llvm-svn: 204776
diff --git a/clang/test/SemaCXX/warn-address.cpp b/clang/test/SemaCXX/warn-address.cpp
new file mode 100644
index 0000000..219edfd
--- /dev/null
+++ b/clang/test/SemaCXX/warn-address.cpp
@@ -0,0 +1,20 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -Wno-bool-conversion -Wno-string-compare -Wno-tautological-compare -Waddress %s
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+void foo();
+int arr[5];
+int global;
+const char* str = "";
+
+void test() {
+  if (foo) {}            // expected-warning{{always evaluate to 'true'}} \
+                         // expected-note{{silence}}
+  if (arr) {}            // expected-warning{{always evaluate to 'true'}}
+  if (&global) {}        // expected-warning{{always evaluate to 'true'}}
+  if (foo == 0) {}       // expected-warning{{always false}} \
+                         // expected-note{{silence}}
+  if (arr == 0) {}       // expected-warning{{always false}}
+  if (&global == 0) {}   // expected-warning{{always false}}
+
+  if (str == "foo") {}   // expected-warning{{unspecified}}
+}