1// RUN: %clang_cc1 -analyze -analyzer-store=region -analyzer-constraints=range -fblocks -analyzer-opt-analyze-nested-blocks -analyzer-checker=alpha.deadcode.IdempotentOperations,osx.cocoa.RetainCount -verify %s 2 3typedef signed char BOOL; 4typedef unsigned long NSUInteger; 5typedef struct _NSZone NSZone; 6@protocol NSObject - (BOOL)isEqual:(id)object; 7@end 8 9@interface NSObject {} 10 @property int locked; 11 @property(nonatomic, readonly) NSObject *media; 12@end 13 14// <rdar://problem/8725041> - Don't flag idempotent operation warnings when 15// a method may invalidate an instance variable. 16@interface Rdar8725041 : NSObject { 17 id _attribute; 18} 19 - (void) method2; 20@end 21 22@implementation Rdar8725041 23- (BOOL) method1 { 24 BOOL needsUpdate = (BOOL)0; 25 id oldAttribute = _attribute; 26 [self method2]; 27 needsUpdate |= (_attribute != oldAttribute); // no-warning 28 return needsUpdate; 29} 30 31- (void) method2 32{ 33 _attribute = ((void*)0); 34} 35@end 36 37// Test that the idempotent operations checker works in the prescence 38// of property expressions. 39void pr9116(NSObject *placeholder) { 40 int x = placeholder.media.locked = placeholder ? 1 : 0; 41} 42 43// <rdar://problem/9130239>: Test that calling property setters doesn't 44// trigger an assertion failure when the object is nil. 45@interface RDar9130239 46@property (assign) id delegate; 47@end 48 49void test_RDar9130239(RDar9130239 *x) { 50 if (x) 51 return; 52 x.delegate = x; // no-warning 53} 54 55