490   NOT_PRODUCT(nodes_created++);
 491   // Do not patch over the debug_idx of a clone, because it makes it
 492   // impossible to break on the clone's moment of creation.
 493   //debug_only( n->set_debug_idx( debug_idx() ) );
 494 
 495   C->copy_node_notes_to(n, (Node*) this);
 496 
 497   // MachNode clone
 498   uint nopnds;
 499   if (this->is_Mach() && (nopnds = this->as_Mach()->num_opnds()) > 0) {
 500     MachNode *mach  = n->as_Mach();
 501     MachNode *mthis = this->as_Mach();
 502     // Get address of _opnd_array.
 503     // It should be the same offset since it is the clone of this node.
 504     MachOper **from = mthis->_opnds;
 505     MachOper **to = (MachOper **)((size_t)(&mach->_opnds) +
 506                     pointer_delta((const void*)from,
 507                                   (const void*)(&mthis->_opnds), 1));
 508     mach->_opnds = to;
 509     for ( uint i = 0; i < nopnds; ++i ) {
 510       to[i] = from[i]->clone(C);
 511     }
 512   }
 513   // cloning CallNode may need to clone JVMState
 514   if (n->is_Call()) {
 515     n->as_Call()->clone_jvms(C);
 516   }
 517   if (n->is_SafePoint()) {
 518     n->as_SafePoint()->clone_replaced_nodes();
 519   }
 520   return n;                     // Return the clone
 521 }
 522 
 523 //---------------------------setup_is_top--------------------------------------
 524 // Call this when changing the top node, to reassert the invariants
 525 // required by Node::is_top.  See Compile::set_cached_top_node.
 526 void Node::setup_is_top() {
 527   if (this == (Node*)Compile::current()->top()) {
 528     // This node has just become top.  Kill its out array.
 529     _outcnt = _outmax = 0;
 530     _out = NULL;                           // marker value for top

 490   NOT_PRODUCT(nodes_created++);
 491   // Do not patch over the debug_idx of a clone, because it makes it
 492   // impossible to break on the clone's moment of creation.
 493   //debug_only( n->set_debug_idx( debug_idx() ) );
 494 
 495   C->copy_node_notes_to(n, (Node*) this);
 496 
 497   // MachNode clone
 498   uint nopnds;
 499   if (this->is_Mach() && (nopnds = this->as_Mach()->num_opnds()) > 0) {
 500     MachNode *mach  = n->as_Mach();
 501     MachNode *mthis = this->as_Mach();
 502     // Get address of _opnd_array.
 503     // It should be the same offset since it is the clone of this node.
 504     MachOper **from = mthis->_opnds;
 505     MachOper **to = (MachOper **)((size_t)(&mach->_opnds) +
 506                     pointer_delta((const void*)from,
 507                                   (const void*)(&mthis->_opnds), 1));
 508     mach->_opnds = to;
 509     for ( uint i = 0; i < nopnds; ++i ) {
 510       to[i] = from[i]->clone();
 511     }
 512   }
 513   // cloning CallNode may need to clone JVMState
 514   if (n->is_Call()) {
 515     n->as_Call()->clone_jvms(C);
 516   }
 517   if (n->is_SafePoint()) {
 518     n->as_SafePoint()->clone_replaced_nodes();
 519   }
 520   return n;                     // Return the clone
 521 }
 522 
 523 //---------------------------setup_is_top--------------------------------------
 524 // Call this when changing the top node, to reassert the invariants
 525 // required by Node::is_top.  See Compile::set_cached_top_node.
 526 void Node::setup_is_top() {
 527   if (this == (Node*)Compile::current()->top()) {
 528     // This node has just become top.  Kill its out array.
 529     _outcnt = _outmax = 0;
 530     _out = NULL;                           // marker value for top