From 01af97d3b23bded2b2b21af19bbc6e4cce49e5b3 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 2 May 2011 19:39:53 +0000
Subject: Vendor import of clang trunk r130700:
 http://llvm.org/svn/llvm-project/cfe/trunk@130700

---
 test/Analysis/nullptr.cpp | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 test/Analysis/nullptr.cpp

(limited to 'test/Analysis/nullptr.cpp')

diff --git a/test/Analysis/nullptr.cpp b/test/Analysis/nullptr.cpp
new file mode 100644
index 000000000000..b74a5abcdfa4
--- /dev/null
+++ b/test/Analysis/nullptr.cpp
@@ -0,0 +1,41 @@
+// RUN: %clang_cc1 -std=c++0x -analyze -analyzer-checker=core -analyzer-store region -verify %s
+
+// test to see if nullptr is detected as a null pointer
+void foo1(void) {
+  char  *np = nullptr;
+  *np = 0;  // expected-warning{{Dereference of null pointer}}
+}
+
+// check if comparing nullptr to nullptr is detected properly
+void foo2(void) {
+  char *np1 = nullptr;
+  char *np2 = np1;
+  char c;
+  if (np1 == np2)
+    np1 = &c;
+  *np1 = 0;  // no-warning
+}
+
+// invoving a nullptr in a more complex operation should be cause a warning
+void foo3(void) {
+  struct foo {
+    int a, f;
+  };
+  char *np = nullptr;
+  // casting a nullptr to anything should be caught eventually
+  int *ip = &(((struct foo *)np)->f);
+  *ip = 0;  // expected-warning{{Dereference of null pointer}}
+  // should be error here too, but analysis gets stopped
+//  *np = 0;
+}
+
+// nullptr is implemented as a zero integer value, so should be able to compare
+void foo4(void) {
+  char *np = nullptr;
+  if (np != 0)
+    *np = 0;  // no-warning
+  char  *cp = 0;
+  if (np != cp)
+    *np = 0;  // no-warning
+}
+
-- 
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