Add test case for 'nil receiver returns undefined struct value' check.

llvm-svn: 65004

clang/test/Analysis/rdar-6600344-nil-receiver-undefined-struct-ret.m

@@ -0,0 +1,19 @@
+// RUN: clang -analyze -checker-cfref -analyzer-constraints=basic -analyzer-store=basic %s -verify
+
+typedef struct Foo { int x; } Bar;
+
+@interface MyClass {}
+- (Bar)foo;
+@end
+@implementation MyClass
+- (Bar)foo { 
+  struct Foo f = { 0 };
+  return f;
+}
+@end
+
+void createFoo() {
+  MyClass *obj = 0;  
+  Bar f = [obj foo]; // expected-warning{{The receiver in the message expression is 'nil' and results in the returned value (of type 'Bar') to be garbage or otherwise undefined.}}
+}
+