src/hotspot/share/gc/shared/taskqueue.inline.hpp

rev 56016 : 8229422: Taskqueue: Outdated selection of weak memory model platforms
Reviewed-by:

*** 205,215 ****
  bool GenericTaskQueue<E, F, N>::pop_global(volatile E& t) {
    Age oldAge = _age.get();
    // Architectures with weak memory model require a barrier here
    // to guarantee that bottom is not older than age,
    // which is crucial for the correctness of the algorithm.
! #if !(defined SPARC || defined IA32 || defined AMD64)
    OrderAccess::fence();
  #endif
    uint localBot = OrderAccess::load_acquire(&_bottom);
    uint n_elems = size(localBot, oldAge.top());
    if (n_elems == 0) {
--- 205,215 ----
  bool GenericTaskQueue<E, F, N>::pop_global(volatile E& t) {
    Age oldAge = _age.get();
    // Architectures with weak memory model require a barrier here
    // to guarantee that bottom is not older than age,
    // which is crucial for the correctness of the algorithm.
! #ifndef CPU_MULTI_COPY_ATOMIC
    OrderAccess::fence();
  #endif
    uint localBot = OrderAccess::load_acquire(&_bottom);
    uint n_elems = size(localBot, oldAge.top());
    if (n_elems == 0) {