From 960ecba4bf0515ef3094d68af4d6225f4f11c6d2 Mon Sep 17 00:00:00 2001
From: Martin Sebor <msebor@redhat.com>
Date: Wed, 11 Jan 2017 18:33:13 +0000
Subject: [PATCH] PR c/47931 - missing -Waddress warning for comparison with
 NULL

gcc/testsuite/ChangeLog:
	* c-c++-common/Waddress-2.c: New test.

From-SVN: r244331
---
 gcc/testsuite/ChangeLog                 |  5 +++++
 gcc/testsuite/c-c++-common/Waddress-2.c | 30 +++++++++++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 gcc/testsuite/c-c++-common/Waddress-2.c

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 4df8d41da99..51bcf982f6d 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2017-01-11  Martin Sebor  <msebor@redhat.com>
+
+	PR c/47931
+	* c-c++-common/Waddress-2.c: New test.
+
 2017-01-11  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/78341
diff --git a/gcc/testsuite/c-c++-common/Waddress-2.c b/gcc/testsuite/c-c++-common/Waddress-2.c
new file mode 100644
index 00000000000..b58a55fe95f
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/Waddress-2.c
@@ -0,0 +1,30 @@
+/* PR c/47931 - missing -Waddress warning for comparison with NULL
+  { dg-do compile }
+  { dg-options "-Waddress" } */
+
+#define NULL ((void *) 0)
+
+int i;
+
+int f0 (void)
+{
+  return &i != 0;   /* { dg-warning "the address of .i. will never be NULL" } */
+}
+
+int f1 (void)
+{
+  return &i != (void *) 0;   /* { dg-warning "the address of .i. will never be NULL" } */
+}
+
+int f2 (void)
+{
+  return &i != NULL;   /* { dg-warning "the address of .i. will never be NULL" } */
+}
+
+int f3 (void)
+{
+  return &i != (int *) 0;
+}
+
+
+
-- 
2.30.2