639 }
640 return find_non_split_ctrl(n);
641 }
642 Node *dom_lca_for_get_late_ctrl_internal( Node *lca, Node *n, Node *tag );
643
644 // Helper function for directing control inputs away from CFG split
645 // points.
646 Node *find_non_split_ctrl( Node *ctrl ) const {
647 if (ctrl != NULL) {
648 if (ctrl->is_MultiBranch()) {
649 ctrl = ctrl->in(0);
650 }
651 assert(ctrl->is_CFG(), "CFG");
652 }
653 return ctrl;
654 }
655
656 bool cast_incr_before_loop(Node* incr, Node* ctrl, Node* loop);
657
658 public:
659 bool has_node( Node* n ) const {
660 guarantee(n != NULL, "No Node.");
661 return _nodes[n->_idx] != NULL;
662 }
663 // check if transform created new nodes that need _ctrl recorded
664 Node *get_late_ctrl( Node *n, Node *early );
665 Node *get_early_ctrl( Node *n );
666 Node *get_early_ctrl_for_expensive(Node *n, Node* earliest);
667 void set_early_ctrl( Node *n );
668 void set_subtree_ctrl( Node *root );
669 void set_ctrl( Node *n, Node *ctrl ) {
670 assert( !has_node(n) || has_ctrl(n), "" );
671 assert( ctrl->in(0), "cannot set dead control node" );
672 assert( ctrl == find_non_split_ctrl(ctrl), "must set legal crtl" );
673 _nodes.map( n->_idx, (Node*)((intptr_t)ctrl + 1) );
674 }
675 // Set control and update loop membership
676 void set_ctrl_and_loop(Node* n, Node* ctrl) {
677 IdealLoopTree* old_loop = get_loop(get_ctrl(n));
678 IdealLoopTree* new_loop = get_loop(ctrl);
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639 }
640 return find_non_split_ctrl(n);
641 }
642 Node *dom_lca_for_get_late_ctrl_internal( Node *lca, Node *n, Node *tag );
643
644 // Helper function for directing control inputs away from CFG split
645 // points.
646 Node *find_non_split_ctrl( Node *ctrl ) const {
647 if (ctrl != NULL) {
648 if (ctrl->is_MultiBranch()) {
649 ctrl = ctrl->in(0);
650 }
651 assert(ctrl->is_CFG(), "CFG");
652 }
653 return ctrl;
654 }
655
656 bool cast_incr_before_loop(Node* incr, Node* ctrl, Node* loop);
657
658 public:
659
660 static bool is_canonical_main_loop_entry(CountedLoopNode* cl);
661
662 bool has_node( Node* n ) const {
663 guarantee(n != NULL, "No Node.");
664 return _nodes[n->_idx] != NULL;
665 }
666 // check if transform created new nodes that need _ctrl recorded
667 Node *get_late_ctrl( Node *n, Node *early );
668 Node *get_early_ctrl( Node *n );
669 Node *get_early_ctrl_for_expensive(Node *n, Node* earliest);
670 void set_early_ctrl( Node *n );
671 void set_subtree_ctrl( Node *root );
672 void set_ctrl( Node *n, Node *ctrl ) {
673 assert( !has_node(n) || has_ctrl(n), "" );
674 assert( ctrl->in(0), "cannot set dead control node" );
675 assert( ctrl == find_non_split_ctrl(ctrl), "must set legal crtl" );
676 _nodes.map( n->_idx, (Node*)((intptr_t)ctrl + 1) );
677 }
678 // Set control and update loop membership
679 void set_ctrl_and_loop(Node* n, Node* ctrl) {
680 IdealLoopTree* old_loop = get_loop(get_ctrl(n));
681 IdealLoopTree* new_loop = get_loop(ctrl);
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