Add static analyzer support for C++'0X nullptr. Patch by Jim Goodnow II.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130003 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Analysis/nullptr.cpp b/test/Analysis/nullptr.cpp
new file mode 100644
index 0000000..b74a5ab
--- /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
+}
+