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// expected-no-diagnostics 3 4typedef signed char BOOL; 5typedef unsigned long NSUInteger; 6typedef struct _NSZone NSZone; 7@protocol NSObject - (BOOL)isEqual:(id)object; 8@end 9 10@interface NSObject {} 11 @property int locked; 12 @property(nonatomic, readonly) NSObject *media; 13@end 14 15// <rdar://problem/8725041> - Don't flag idempotent operation warnings when 16// a method may invalidate an instance variable. 17@interface Rdar8725041 : NSObject { 18 id _attribute; 19} 20 - (void) method2; 21@end 22 23@implementation Rdar8725041 24- (BOOL) method1 { 25 BOOL needsUpdate = (BOOL)0; 26 id oldAttribute = _attribute; 27 [self method2]; 28 needsUpdate |= (_attribute != oldAttribute); // no-warning 29 return needsUpdate; 30} 31 32- (void) method2 33{ 34 _attribute = ((void*)0); 35} 36@end 37 38// Test that the idempotent operations checker works in the prescence 39// of property expressions. 40void pr9116(NSObject *placeholder) { 41 int x = placeholder.media.locked = placeholder ? 1 : 0; 42} 43 44// <rdar://problem/9130239>: Test that calling property setters doesn't 45// trigger an assertion failure when the object is nil. 46@interface RDar9130239 47@property (assign) id delegate; 48@end 49 50void test_RDar9130239(RDar9130239 *x) { 51 if (x) 52 return; 53 x.delegate = x; // no-warning 54} 55 56