1 files changed, 54 insertions, 0 deletions
diff --git a/clang/test/Analysis/idempotent-operations.m b/clang/test/Analysis/idempotent-operations.m
new file mode 100644
index 0000000..9a9820c
--- /dev/null
+++ b/clang/test/Analysis/idempotent-operations.m
@@ -0,0 +1,54 @@
+// RUN: %clang_cc1 -analyze -analyzer-store=region -analyzer-constraints=range -fblocks -analyzer-opt-analyze-nested-blocks -analyzer-checker=experimental.deadcode.IdempotentOperations,osx.cocoa.RetainCount -verify %s
+
+typedef signed char BOOL;
+typedef unsigned long NSUInteger;
+typedef struct _NSZone NSZone;
+@protocol NSObject  - (BOOL)isEqual:(id)object;
+@end
+
+@interface NSObject {}
+  @property int locked;
+  @property(nonatomic, readonly) NSObject *media;
+@end
+
+// <rdar://problem/8725041> - Don't flag idempotent operation warnings when
+// a method may invalidate an instance variable.
+@interface Rdar8725041 : NSObject {
+  id _attribute;
+}
+  - (void) method2;
+@end
+
+@implementation Rdar8725041
+- (BOOL) method1 {
+  BOOL needsUpdate = (BOOL)0;
+  id oldAttribute = _attribute;
+  [self method2];
+  needsUpdate |= (_attribute != oldAttribute); // no-warning
+  return needsUpdate;
+}
+
+- (void) method2
+{
+  _attribute = ((void*)0);
+}
+@end
+
+// Test that the idempotent operations checker works in the prescence
+// of property expressions.
+void pr9116(NSObject *placeholder) {
+  int x = placeholder.media.locked = placeholder ? 1 : 0;
+}
+
+// <rdar://problem/9130239>: Test that calling property setters doesn't 
+// trigger an assertion failure when the object is nil.
+@interface RDar9130239
+@property (assign) id delegate;
+@end
+
+void test_RDar9130239(RDar9130239 *x) {
+  if (x)
+    return;
+  x.delegate = x; // no-warning
+}
+