1*d21b3d34SFangrui Song // RUN: %clangxx_msan -O0 %s -o %t && %run %t 2*d21b3d34SFangrui Song main(void)3*d21b3d34SFangrui Song int main(void) { 4*d21b3d34SFangrui Song int i; 5*d21b3d34SFangrui Song __sync_lock_test_and_set(&i, 0); 6*d21b3d34SFangrui Song return i; 7*d21b3d34SFangrui Song } 8