src/share/vm/opto/parse3.cpp

*** 231,241 ****
      insert_mem_bar(Op_MemBarVolatile);   // StoreLoad barrier
    }
    // Build the load.
    //
    MemNode::MemOrd mo = is_vol ? MemNode::acquire : MemNode::unordered;
!   Node* ld = make_load(NULL, adr, type, bt, adr_type, mo, is_vol);
  
    // Adjust Java stack
    if (type2size[bt] == 1)
      push(ld);
    else
--- 231,242 ----
      insert_mem_bar(Op_MemBarVolatile);   // StoreLoad barrier
    }
    // Build the load.
    //
    MemNode::MemOrd mo = is_vol ? MemNode::acquire : MemNode::unordered;
!   bool needs_atomic_access = is_vol || AlwaysAtomicAccesses;
!   Node* ld = make_load(NULL, adr, type, bt, adr_type, mo, needs_atomic_access);
  
    // Adjust Java stack
    if (type2size[bt] == 1)
      push(ld);
    else
*** 312,322 ****
      } else {
        field_type = TypeOopPtr::make_from_klass(field->type()->as_klass());
      }
      store = store_oop_to_object(control(), obj, adr, adr_type, val, field_type, bt, mo);
    } else {
!     store = store_to_memory(control(), adr, val, bt, adr_type, mo, is_vol);
    }
  
    // If reference is volatile, prevent following volatiles ops from
    // floating up before the volatile write.
    if (is_vol) {
--- 313,324 ----
      } else {
        field_type = TypeOopPtr::make_from_klass(field->type()->as_klass());
      }
      store = store_oop_to_object(control(), obj, adr, adr_type, val, field_type, bt, mo);
    } else {
!     bool needs_atomic_access = is_vol || AlwaysAtomicAccesses;
!     store = store_to_memory(control(), adr, val, bt, adr_type, mo, needs_atomic_access);
    }
  
    // If reference is volatile, prevent following volatiles ops from
    // floating up before the volatile write.
    if (is_vol) {