18c2ecf20Sopenharmony_ciC CoWR+poonceonce+Once 28c2ecf20Sopenharmony_ci 38c2ecf20Sopenharmony_ci(* 48c2ecf20Sopenharmony_ci * Result: Never 58c2ecf20Sopenharmony_ci * 68c2ecf20Sopenharmony_ci * Test of write-read coherence, that is, whether or not a write to a 78c2ecf20Sopenharmony_ci * given variable and a later read from that same variable are ordered. 88c2ecf20Sopenharmony_ci *) 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ci{} 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ciP0(int *x) 138c2ecf20Sopenharmony_ci{ 148c2ecf20Sopenharmony_ci int r0; 158c2ecf20Sopenharmony_ci 168c2ecf20Sopenharmony_ci WRITE_ONCE(*x, 1); 178c2ecf20Sopenharmony_ci r0 = READ_ONCE(*x); 188c2ecf20Sopenharmony_ci} 198c2ecf20Sopenharmony_ci 208c2ecf20Sopenharmony_ciP1(int *x) 218c2ecf20Sopenharmony_ci{ 228c2ecf20Sopenharmony_ci WRITE_ONCE(*x, 2); 238c2ecf20Sopenharmony_ci} 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_ciexists (x=1 /\ 0:r0=2) 26