[analyzer] DynTypes: Add a test for improper cast performed by user.

Dynamic type inference does the right thing in this case. However, as
Jordan suggested, it would be nice to add a warning here as well.

llvm-svn: 161365

1 files changed, 37 insertions, 0 deletions

diff --git a/clang/test/Analysis/inlining/ObjCImproperDynamictallyDetectableCast.m b/clang/test/Analysis/inlining/ObjCImproperDynamictallyDetectableCast.m
new file mode 100644
index 00000000000..b43304d5f44
--- /dev/null
+++ b/clang/test/Analysis/inlining/ObjCImproperDynamictallyDetectableCast.m
@@ -0,0 +1,37 @@
+// RUN: %clang_cc1 -analyze -analyzer-checker=core,debug.ExprInspection -analyzer-ipa=dynamic -verify %s
+
+typedef signed char BOOL;
+@protocol NSObject  - (BOOL)isEqual:(id)object; @end
+@interface NSObject <NSObject> {}
++(id)alloc;
+-(id)init;
++(id)new;
+-(id)autorelease;
+-(id)copy;
+- (Class)class;
+-(id)retain;
+@end
+void clang_analyzer_eval(BOOL);
+
+@interface SomeOtherClass : NSObject
+- (int)getZero;
+@end
+@implementation SomeOtherClass
+- (int)getZero { return 0; }
+@end
+
+@interface MyClass : NSObject
+- (int)getZero;
+@end
+
+@implementation MyClass
+- (int)getZero { return 1; }
+
+// TODO: Not only we should correctly determine that the type of o at runtime 
+// is MyClass, but we should also warn about it. 
++ (void) testCastToParent {
+  id a = [[self alloc] init];
+  SomeOtherClass *o = a;  
+  clang_analyzer_eval([o getZero] == 0); // expected-warning{{FALSE}}
+}
+@end
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