src/share/vm/opto/loopTransform.cpp

*** 507,524 ****
    //         Do this by making the old-loop fall-in edges act as if they came
    //         around the loopback from the prior iteration (follow the old-loop
    //         backedges) and then map to the new peeled iteration.  This leaves
    //         the pre-loop with only 1 user (the new peeled iteration), but the
    //         peeled-loop backedge has 2 users.
!   Node* new_exit_value = old_new[head->in(LoopNode::LoopBackControl)->_idx];
!   new_exit_value = move_loop_predicates(entry, new_exit_value, !counted_loop);
    _igvn.hash_delete(head);
!   head->set_req(LoopNode::EntryControl, new_exit_value);
    for (DUIterator_Fast jmax, j = head->fast_outs(jmax); j < jmax; j++) {
      Node* old = head->fast_out(j);
      if (old->in(0) == loop->_head && old->req() == 3 && old->is_Phi()) {
!       new_exit_value = old_new[old->in(LoopNode::LoopBackControl)->_idx];
        if (!new_exit_value )     // Backedge value is ALSO loop invariant?
          // Then loop body backedge value remains the same.
          new_exit_value = old->in(LoopNode::LoopBackControl);
        _igvn.hash_delete(old);
        old->set_req(LoopNode::EntryControl, new_exit_value);
--- 507,523 ----
    //         Do this by making the old-loop fall-in edges act as if they came
    //         around the loopback from the prior iteration (follow the old-loop
    //         backedges) and then map to the new peeled iteration.  This leaves
    //         the pre-loop with only 1 user (the new peeled iteration), but the
    //         peeled-loop backedge has 2 users.
!   Node* new_entry = old_new[head->in(LoopNode::LoopBackControl)->_idx];
    _igvn.hash_delete(head);
!   head->set_req(LoopNode::EntryControl, new_entry);
    for (DUIterator_Fast jmax, j = head->fast_outs(jmax); j < jmax; j++) {
      Node* old = head->fast_out(j);
      if (old->in(0) == loop->_head && old->req() == 3 && old->is_Phi()) {
!       Node* new_exit_value = old_new[old->in(LoopNode::LoopBackControl)->_idx];
        if (!new_exit_value )     // Backedge value is ALSO loop invariant?
          // Then loop body backedge value remains the same.
          new_exit_value = old->in(LoopNode::LoopBackControl);
        _igvn.hash_delete(old);
        old->set_req(LoopNode::EntryControl, new_exit_value);