1// RUN: %clang_cc1 -triple x86_64-apple-darwin9 -analyze -analyzer-checker=core,osx -analyzer-store=region -verify -fblocks   -analyzer-opt-analyze-nested-blocks %s
2// expected-no-diagnostics
3
4// Test handling of OSAtomicCompareAndSwap when C++ inserts "no-op" casts and we
5// do a forced load and binding to the environment on an expression that would regularly
6// not have an environment binding.  This previously triggered a crash (<rdar://problem/9339920>).
7// NOTE: It is critical that the function called is OSAtomicCompareAndSwapIntBarrier.
8bool OSAtomicCompareAndSwapIntBarrier( int __oldValue, int __newValue, volatile int *__theValue ) ;
9static int _rdar9339920_x = 0;
10int rdar9339920_aux();
11
12int rdar9339920_test() {
13  int rdar9339920_x = rdar9339920_aux();
14  if (rdar9339920_x != _rdar9339920_x) {
15    if (OSAtomicCompareAndSwapIntBarrier(_rdar9339920_x, rdar9339920_x, &_rdar9339920_x))
16      return 1;
17  }
18  return 0;
19}
20
21