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1// RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin9 -analyzer-checker=core,alpha.core -verify -fblocks %s2// expected-no-diagnostics3 4// A bunch of misc. failures involving evaluating these expressions and5// building CFGs. These tests are here to prevent regressions.6typedef long long int64_t;7@class NSString, NSDictionary;8typedef long NSInteger;9typedef unsigned long NSUInteger;10typedef unsigned char Boolean;11typedef const struct __CFDictionary * CFDictionaryRef;12 13extern Boolean CFDictionaryGetValueIfPresent(CFDictionaryRef theDict, const void *key, const void **value);14void shazam(NSUInteger i, unsigned char **out);15 16void rdar_6440393_1(NSDictionary *dict) {17 NSInteger x = 0;18 unsigned char buf[10], *bufptr = buf;19 if (!CFDictionaryGetValueIfPresent(0, dict, (void *)&x))20 return;21 shazam(x, &bufptr);22}23 24// In this example we got a signedness mismatch between the literal '0' and the25// value of 'scrooge'. The trick is to have the evaluator convert the literal26// to an unsigned integer when doing a comparison with the pointer. This27// happens because of the transfer function logic of28// OSAtomicCompareAndSwap64Barrier, which doesn't have special casts in place29// to do this for us.30_Bool OSAtomicCompareAndSwap64Barrier( int64_t __oldValue, int64_t __newValue, volatile int64_t *__theValue );31extern id objc_lookUpClass(const char *name);32void rdar_6845148(id debug_yourself) {33 if (!debug_yourself) {34 const char *wacky = ((void *)0); 35 Class scrooge = wacky ? (Class)objc_lookUpClass(wacky) : ((void *)0); 36 OSAtomicCompareAndSwap64Barrier(0, (int64_t)scrooge, (int64_t*)&debug_yourself);37 }38}39void rdar_6845148_b(id debug_yourself) {40 if (!debug_yourself) {41 const char *wacky = ((void *)0); 42 Class scrooge = wacky ? (Class)objc_lookUpClass(wacky) : ((void *)0); 43 OSAtomicCompareAndSwap64Barrier((int64_t)scrooge, 0, (int64_t*)&debug_yourself);44 }45}46