update NOTICE and LICENSE
[nit.git] / c_src / partial_order._sep.c
index 1715444..c3e81e8 100644 (file)
 /* This C file is generated by NIT to compile module partial_order. */
 #include "partial_order._sep.h"
-val_t partial_order___PartialOrder___roots(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 30, LOCATE_partial_order___PartialOrder___roots};
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  tracehead = trace.prev;
-  return ATTR_partial_order___PartialOrder____roots( self) /*PartialOrder::_roots*/;
-}
-val_t partial_order___PartialOrder___is_empty(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 35, LOCATE_partial_order___PartialOrder___is_empty};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 = ATTR_partial_order___PartialOrder____elements( self) /*PartialOrder::_elements*/;
-  variable0 = ((abstract_collection___Collection___is_empty_t)CALL(variable0,COLOR_abstract_collection___Collection___is_empty))(variable0) /*Collection::is_empty*/;
-  goto return_label0;
-  return_label0: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t partial_order___PartialOrder___length(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 37, LOCATE_partial_order___PartialOrder___length};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 = ATTR_partial_order___PartialOrder____elements( self) /*PartialOrder::_elements*/;
-  variable0 = ((abstract_collection___Collection___length_t)CALL(variable0,COLOR_abstract_collection___Collection___length))(variable0) /*Collection::length*/;
-  goto return_label1;
-  return_label1: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t partial_order___PartialOrder___first(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 39, LOCATE_partial_order___PartialOrder___first};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 = ATTR_partial_order___PartialOrder____elements_list( self) /*PartialOrder::_elements_list*/;
-  variable0 = ((abstract_collection___IndexedCollection___first_t)CALL(variable0,COLOR_abstract_collection___Collection___first))(variable0) /*IndexedCollection::first*/;
-  goto return_label2;
-  return_label2: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t partial_order___PartialOrder___has(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, NULL, 41, LOCATE_partial_order___PartialOrder___has};
-  val_t variable0;
-  val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 = ATTR_partial_order___PartialOrder____elements( self) /*PartialOrder::_elements*/;
-  variable1 = ((abstract_collection___Map___has_key_t)CALL(variable1,COLOR_abstract_collection___Map___has_key))(variable1,  variable0 /*e*/) /*Map::has_key*/;
-  goto return_label3;
-  return_label3: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t partial_order___PartialOrder___has_only(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, NULL, 43, LOCATE_partial_order___PartialOrder___has_only};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 = ATTR_partial_order___PartialOrder____elements( self) /*PartialOrder::_elements*/;
-  variable1 = ((abstract_collection___Collection___length_t)CALL(variable1,COLOR_abstract_collection___Collection___length))(variable1) /*Collection::length*/;
-  variable1 = TAG_Bool((variable1)==( TAG_Int(1)));
-  variable2 = variable1;
-  if (UNTAG_Bool(variable2)) { /* and */
-    variable2 = ATTR_partial_order___PartialOrder____elements( self) /*PartialOrder::_elements*/;
-    variable2 = ((abstract_collection___Collection___first_t)CALL(variable2,COLOR_abstract_collection___Collection___first))(variable2) /*Collection::first*/;
-    variable2 = TAG_Bool((variable2 ==  variable0 /*e*/) || ((variable2 != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL(variable2,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN(variable2, variable0 /*e*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL(variable2,COLOR_kernel___Object_____eqeq))(variable2,  variable0 /*e*/) /*Object::==*/)))));
-  }
-  variable1 = variable2;
-  goto return_label4;
-  return_label4: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t partial_order___PartialOrder___count(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, NULL, 45, LOCATE_partial_order___PartialOrder___count};
-  val_t variable0;
-  val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 = ((partial_order___PartialOrder___has_t)CALL( self,COLOR_abstract_collection___Collection___has))( self,  variable0 /*e*/) /*PartialOrder::has*/;
-  if (UNTAG_Bool(variable1)) { /*if*/
-    variable1 =  TAG_Int(1);
-    goto return_label5;
-  } else { /*if*/
-    variable1 =  TAG_Int(0);
-    goto return_label5;
-  }
-  return_label5: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t partial_order___PartialOrder___iterator(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 54, LOCATE_partial_order___PartialOrder___iterator};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 = ATTR_partial_order___PartialOrder____elements_list( self) /*PartialOrder::_elements_list*/;
-  variable0 = ((array___AbstractArray___iterator_t)CALL(variable0,COLOR_abstract_collection___Collection___iterator))(variable0) /*AbstractArray::iterator*/;
-  goto return_label6;
-  return_label6: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t partial_order___PartialOrder_____bra(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, NULL, 58, LOCATE_partial_order___PartialOrder_____bra};
-  val_t variable0;
-  val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 = ATTR_partial_order___PartialOrder____elements( self) /*PartialOrder::_elements*/;
-  variable1 = ((abstract_collection___Map___has_key_t)CALL(variable1,COLOR_abstract_collection___Map___has_key))(variable1,  variable0 /*e*/) /*Map::has_key*/;
-  if (UNTAG_Bool(variable1)) { /*if*/
-    variable1 = ATTR_partial_order___PartialOrder____elements( self) /*PartialOrder::_elements*/;
-    variable1 = ((abstract_collection___Map_____bra_t)CALL(variable1,COLOR_abstract_collection___Map_____bra))(variable1,  variable0 /*e*/) /*Map::[]*/;
-    goto return_label7;
-  } else { /*if*/
-    variable1 =  NIT_NULL /*null*/;
-    goto return_label7;
-  }
-  return_label7: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t partial_order___PartialOrder___to_dot(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 68, LOCATE_partial_order___PartialOrder___to_dot};
-  val_t variable0;
-  val_t variable1;
-    val_t variable2;
-    val_t variable3;
-      val_t variable4;
-      val_t variable5;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable1 = NEW_string___String___init(); /*new String*/
-  variable0 = variable1;
-  variable1 = ((partial_order___PartialOrder___to_dot_header_t)CALL( self,COLOR_partial_order___PartialOrder___to_dot_header))( self) /*PartialOrder::to_dot_header*/;
-  ((string___String___append_t)CALL( variable0 /*s*/,COLOR_abstract_collection___IndexedCollection___append))( variable0 /*s*/, variable1) /*String::append*/;
-  variable1 = ATTR_partial_order___PartialOrder____elements( self) /*PartialOrder::_elements*/;
-  variable1 = ((abstract_collection___Map___iterator_t)CALL(variable1,COLOR_abstract_collection___Collection___iterator))(variable1) /*Map::iterator*/;
-  while (true) { /*for*/
-    variable2 = ((abstract_collection___Iterator___is_ok_t)CALL(variable1,COLOR_abstract_collection___Iterator___is_ok))(variable1) /*Iterator::is_ok*/;
-    if (!UNTAG_Bool(variable2)) break; /*for*/
-    variable2 = ((abstract_collection___Iterator___item_t)CALL(variable1,COLOR_abstract_collection___Iterator___item))(variable1) /*Iterator::item*/;
-    variable3 = ((partial_order___PartialOrderElement___value_t)CALL( variable2 /*e*/,COLOR_partial_order___PartialOrderElement___value))( variable2 /*e*/) /*PartialOrderElement::value*/;
-    variable3 = ((partial_order___PartialOrder___to_dot_node_t)CALL( self,COLOR_partial_order___PartialOrder___to_dot_node))( self, variable3) /*PartialOrder::to_dot_node*/;
-    ((string___String___append_t)CALL( variable0 /*s*/,COLOR_abstract_collection___IndexedCollection___append))( variable0 /*s*/, variable3) /*String::append*/;
-    variable3 = ((partial_order___PartialOrderElement___direct_greaters_t)CALL( variable2 /*e*/,COLOR_partial_order___PartialOrderElement___direct_greaters))( variable2 /*e*/) /*PartialOrderElement::direct_greaters*/;
-    variable3 = ((array___AbstractArray___iterator_t)CALL(variable3,COLOR_abstract_collection___Collection___iterator))(variable3) /*AbstractArray::iterator*/;
-    while (true) { /*for*/
-      variable4 = ((array___ArrayIterator___is_ok_t)CALL(variable3,COLOR_abstract_collection___Iterator___is_ok))(variable3) /*ArrayIterator::is_ok*/;
-      if (!UNTAG_Bool(variable4)) break; /*for*/
-      variable4 = ((array___ArrayIterator___item_t)CALL(variable3,COLOR_abstract_collection___Iterator___item))(variable3) /*ArrayIterator::item*/;
-      variable5 = ((partial_order___PartialOrderElement___value_t)CALL( variable2 /*e*/,COLOR_partial_order___PartialOrderElement___value))( variable2 /*e*/) /*PartialOrderElement::value*/;
-      variable5 = ((partial_order___PartialOrder___to_dot_edge_t)CALL( self,COLOR_partial_order___PartialOrder___to_dot_edge))( self, variable5,  variable4 /*d*/) /*PartialOrder::to_dot_edge*/;
-      ((string___String___append_t)CALL( variable0 /*s*/,COLOR_abstract_collection___IndexedCollection___append))( variable0 /*s*/, variable5) /*String::append*/;
-      continue_10: while(0);
-      ((array___ArrayIterator___next_t)CALL(variable3,COLOR_abstract_collection___Iterator___next))(variable3) /*ArrayIterator::next*/;
-    }
-    break_10: while(0);
-    continue_9: while(0);
-    ((abstract_collection___Iterator___next_t)CALL(variable1,COLOR_abstract_collection___Iterator___next))(variable1) /*Iterator::next*/;
-  }
-  break_9: while(0);
-  variable1 = NEW_string___String___with_native(BOX_NativeString("}\n"), TAG_Int(2)); /*new String*/
-  ((string___String___append_t)CALL( variable0 /*s*/,COLOR_abstract_collection___IndexedCollection___append))( variable0 /*s*/, variable1) /*String::append*/;
-  variable0 =  variable0 /*s*/;
-  goto return_label8;
-  return_label8: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t partial_order___PartialOrder___to_dot_header(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 83, LOCATE_partial_order___PartialOrder___to_dot_header};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 = NEW_string___String___with_native(BOX_NativeString("digraph G {\ngraph [rankdir=BT];\n"), TAG_Int(32)); /*new String*/
-  goto return_label11;
-  return_label11: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t partial_order___PartialOrder___to_dot_node(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, NULL, 89, LOCATE_partial_order___PartialOrder___to_dot_node};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  val_t variable3;
-  val_t variable4;
-  val_t variable5;
-  val_t variable6;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 = NEW_string___String___init(); /*new String*/
-  variable2 = NEW_string___String___with_native(BOX_NativeString("\""), TAG_Int(1)); /*new String*/
-  variable3 = variable2;
-  ((string___String___append_t)CALL(variable1,COLOR_abstract_collection___IndexedCollection___append))(variable1, variable3) /*String::append*/;
-  variable4 =  variable0 /*e*/;
-  variable4 = ((string___String___to_s_t)CALL(variable4,COLOR_string___Object___to_s))(variable4) /*String::to_s*/;
-  ((string___String___append_t)CALL(variable1,COLOR_abstract_collection___IndexedCollection___append))(variable1, variable4) /*String::append*/;
-  variable5 = NEW_string___String___with_native(BOX_NativeString("\";\n"), TAG_Int(3)); /*new String*/
-  variable6 = variable5;
-  ((string___String___append_t)CALL(variable1,COLOR_abstract_collection___IndexedCollection___append))(variable1, variable6) /*String::append*/;
-  goto return_label12;
-  return_label12: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t partial_order___PartialOrder___to_dot_edge(val_t  self, val_t  param0, val_t  param1) {
-  struct trace_t trace = {NULL, NULL, 95, LOCATE_partial_order___PartialOrder___to_dot_edge};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  val_t variable3;
-  val_t variable4;
-  val_t variable5;
-  val_t variable6;
-  val_t variable7;
-  val_t variable8;
-  val_t variable9;
-  val_t variable10;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 =  param1;
-  variable2 = NEW_string___String___init(); /*new String*/
-  variable3 = NEW_string___String___with_native(BOX_NativeString("\""), TAG_Int(1)); /*new String*/
-  variable4 = variable3;
-  ((string___String___append_t)CALL(variable2,COLOR_abstract_collection___IndexedCollection___append))(variable2, variable4) /*String::append*/;
-  variable5 =  variable0 /*e1*/;
-  variable5 = ((string___String___to_s_t)CALL(variable5,COLOR_string___Object___to_s))(variable5) /*String::to_s*/;
-  ((string___String___append_t)CALL(variable2,COLOR_abstract_collection___IndexedCollection___append))(variable2, variable5) /*String::append*/;
-  variable6 = NEW_string___String___with_native(BOX_NativeString("\" -> \""), TAG_Int(6)); /*new String*/
-  variable7 = variable6;
-  ((string___String___append_t)CALL(variable2,COLOR_abstract_collection___IndexedCollection___append))(variable2, variable7) /*String::append*/;
-  variable8 =  variable1 /*e2*/;
-  variable8 = ((string___String___to_s_t)CALL(variable8,COLOR_string___Object___to_s))(variable8) /*String::to_s*/;
-  ((string___String___append_t)CALL(variable2,COLOR_abstract_collection___IndexedCollection___append))(variable2, variable8) /*String::append*/;
-  variable9 = NEW_string___String___with_native(BOX_NativeString("\";\n"), TAG_Int(3)); /*new String*/
-  variable10 = variable9;
-  ((string___String___append_t)CALL(variable2,COLOR_abstract_collection___IndexedCollection___append))(variable2, variable10) /*String::append*/;
-  goto return_label13;
-  return_label13: while(false);
-  tracehead = trace.prev;
-  return variable2;
-}
-val_t partial_order___PartialOrder___select_smallests(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, NULL, 101, LOCATE_partial_order___PartialOrder___select_smallests};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  val_t variable3;
-  val_t variable4;
-    val_t variable5;
-    val_t variable6;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 = TAG_Bool(( variable0 /*c*/ ==  NIT_NULL /*null*/) || (( variable0 /*c*/ != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL( variable0 /*c*/,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN( variable0 /*c*/, NIT_NULL /*null*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL( variable0 /*c*/,COLOR_kernel___Object_____eqeq))( variable0 /*c*/,  NIT_NULL /*null*/) /*Object::==*/)))));
-  if (UNTAG_Bool(variable1)) { /*if*/
-    variable1 = NEW_array___Array___init(); /*new Array[E]*/
-    goto return_label14;
-  }
-  variable1 = ((partial_order___PartialOrder___has_all_t)CALL( self,COLOR_partial_order___PartialOrder___has_all))( self,  variable0 /*c*/) /*PartialOrder::has_all*/;
-  if (!UNTAG_Bool(variable1)) { fprintf(stderr, "Assert%s failed", ""); fprintf(stderr, " in %s (%s:%d)\n", LOCATE_partial_order___PartialOrder___select_smallests, LOCATE_partial_order, 105); nit_exit(1);}
-  variable2 = ((abstract_collection___Collection___length_t)CALL( variable0 /*c*/,COLOR_abstract_collection___Collection___length))( variable0 /*c*/) /*Collection::length*/;
-  variable3 = NEW_array___Array___with_capacity(variable2); /*new Array[E]*/
-  variable2 = variable3;
-  variable1 = variable2;
-  variable3 = ((abstract_collection___Collection___length_t)CALL( variable0 /*c*/,COLOR_abstract_collection___Collection___length))( variable0 /*c*/) /*Collection::length*/;
-  variable4 = NEW_array___Array___with_capacity(variable3); /*new Array[E]*/
-  variable3 = variable4;
-  variable2 = variable3;
-  variable3 = ((abstract_collection___Collection___iterator_t)CALL( variable0 /*c*/,COLOR_abstract_collection___Collection___iterator))( variable0 /*c*/) /*Collection::iterator*/;
-  while (true) { /*for*/
-    variable4 = ((abstract_collection___Iterator___is_ok_t)CALL(variable3,COLOR_abstract_collection___Iterator___is_ok))(variable3) /*Iterator::is_ok*/;
-    if (!UNTAG_Bool(variable4)) break; /*for*/
-    variable4 = ((abstract_collection___Iterator___item_t)CALL(variable3,COLOR_abstract_collection___Iterator___item))(variable3) /*Iterator::item*/;
-    variable6 = ((partial_order___PartialOrder___add_to_smallests_t)CALL( self,COLOR_partial_order___PartialOrder___add_to_smallests))( self,  variable4 /*e*/,  variable1 /*res*/,  variable2 /*tmp*/) /*PartialOrder::add_to_smallests*/;
-    variable5 = variable6;
-    if (UNTAG_Bool( variable5 /*r*/)) { /*if*/
-      variable6 =  variable2 /*tmp*/;
-      variable2 =  variable1 /*res*/ /*tmp=*/;
-      variable1 =  variable6 /*t*/ /*res=*/;
-    }
-    continue_15: while(0);
-    ((abstract_collection___Iterator___next_t)CALL(variable3,COLOR_abstract_collection___Iterator___next))(variable3) /*Iterator::next*/;
-  }
-  break_15: while(0);
-  variable1 =  variable1 /*res*/;
-  goto return_label14;
-  return_label14: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t partial_order___PartialOrder___add(val_t  self, val_t  param0, val_t  param1) {
-  struct trace_t trace = {NULL, NULL, 122, LOCATE_partial_order___PartialOrder___add};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  val_t variable3;
-  val_t variable4;
-  val_t variable5;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 =  param1;
-  variable2 = ((partial_order___PartialOrder___has_t)CALL( self,COLOR_abstract_collection___Collection___has))( self,  variable0 /*e*/) /*PartialOrder::has*/;
-  if (!UNTAG_Bool( TAG_Bool(!UNTAG_Bool(variable2)))) { fprintf(stderr, "Assert%s failed", ""); fprintf(stderr, " in %s (%s:%d)\n", LOCATE_partial_order___PartialOrder___add, LOCATE_partial_order, 125); nit_exit(1);}
-  variable2 = TAG_Bool(( variable1 /*supers*/ ==  NIT_NULL /*null*/) || (( variable1 /*supers*/ != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL( variable1 /*supers*/,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN( variable1 /*supers*/, NIT_NULL /*null*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL( variable1 /*supers*/,COLOR_kernel___Object_____eqeq))( variable1 /*supers*/,  NIT_NULL /*null*/) /*Object::==*/)))));
-  variable3 = variable2;
-  if (!UNTAG_Bool(variable3)) { /* or */
-    variable3 = ((partial_order___PartialOrder___has_all_t)CALL( self,COLOR_partial_order___PartialOrder___has_all))( self,  variable1 /*supers*/) /*PartialOrder::has_all*/;
-  }
-  variable2 = variable3;
-  if (!UNTAG_Bool(variable2)) { fprintf(stderr, "Assert%s failed", ""); fprintf(stderr, " in %s (%s:%d)\n", LOCATE_partial_order___PartialOrder___add, LOCATE_partial_order, 126); nit_exit(1);}
-  variable3 = ((partial_order___PartialOrder___select_smallests_t)CALL( self,COLOR_partial_order___PartialOrder___select_smallests))( self,  variable1 /*supers*/) /*PartialOrder::select_smallests*/;
-  variable2 = variable3;
-  variable4 = ((partial_order___PartialOrder___new_poe_t)CALL( self,COLOR_partial_order___PartialOrder___new_poe))( self,  variable0 /*e*/,  variable2 /*directs*/) /*PartialOrder::new_poe*/;
-  variable3 = variable4;
-  variable4 = ATTR_partial_order___PartialOrder____elements( self) /*PartialOrder::_elements*/;
-  ((abstract_collection___Map_____braeq_t)CALL(variable4,COLOR_abstract_collection___Map_____braeq))(variable4,  variable0 /*e*/,  variable3 /*poe*/) /*Map::[]=*/;
-  variable4 = ATTR_partial_order___PartialOrder____elements_list( self) /*PartialOrder::_elements_list*/;
-  ((array___AbstractArray___add_t)CALL(variable4,COLOR_abstract_collection___SimpleCollection___add))(variable4,  variable0 /*e*/) /*AbstractArray::add*/;
-  variable4 = TAG_Bool(( variable1 /*supers*/ ==  NIT_NULL /*null*/) || (( variable1 /*supers*/ != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL( variable1 /*supers*/,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN( variable1 /*supers*/, NIT_NULL /*null*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL( variable1 /*supers*/,COLOR_kernel___Object_____eqeq))( variable1 /*supers*/,  NIT_NULL /*null*/) /*Object::==*/)))));
-  variable5 = variable4;
-  if (!UNTAG_Bool(variable5)) { /* or */
-    variable5 = ((abstract_collection___Collection___is_empty_t)CALL( variable1 /*supers*/,COLOR_abstract_collection___Collection___is_empty))( variable1 /*supers*/) /*Collection::is_empty*/;
-  }
-  variable4 = variable5;
-  if (UNTAG_Bool(variable4)) { /*if*/
-    variable4 = ATTR_partial_order___PartialOrder____roots( self) /*PartialOrder::_roots*/;
-    ((array___AbstractArray___add_t)CALL(variable4,COLOR_abstract_collection___SimpleCollection___add))(variable4,  variable0 /*e*/) /*AbstractArray::add*/;
-  }
-  variable2 =  variable3 /*poe*/;
-  goto return_label16;
-  return_label16: while(false);
-  tracehead = trace.prev;
-  return variable2;
-}
-val_t partial_order___PartialOrder___has_all(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, NULL, 137, LOCATE_partial_order___PartialOrder___has_all};
-  val_t variable0;
-  val_t variable1;
-    val_t variable2;
-    val_t variable3;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 = ((abstract_collection___Collection___iterator_t)CALL( variable0 /*e*/,COLOR_abstract_collection___Collection___iterator))( variable0 /*e*/) /*Collection::iterator*/;
-  while (true) { /*for*/
-    variable2 = ((abstract_collection___Iterator___is_ok_t)CALL(variable1,COLOR_abstract_collection___Iterator___is_ok))(variable1) /*Iterator::is_ok*/;
-    if (!UNTAG_Bool(variable2)) break; /*for*/
-    variable2 = ((abstract_collection___Iterator___item_t)CALL(variable1,COLOR_abstract_collection___Iterator___item))(variable1) /*Iterator::item*/;
-    variable3 = ((partial_order___PartialOrder___has_t)CALL( self,COLOR_abstract_collection___Collection___has))( self,  variable2 /*i*/) /*PartialOrder::has*/;
-    if (UNTAG_Bool( TAG_Bool(!UNTAG_Bool(variable3)))) { /*if*/
-      variable1 =  TAG_Bool(false);
-      goto return_label17;
-    }
-    continue_18: while(0);
-    ((abstract_collection___Iterator___next_t)CALL(variable1,COLOR_abstract_collection___Iterator___next))(variable1) /*Iterator::next*/;
-  }
-  break_18: while(0);
-  variable1 =  TAG_Bool(true);
-  goto return_label17;
-  return_label17: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t partial_order___PartialOrder___new_poe(val_t  self, val_t  param0, val_t  param1) {
-  struct trace_t trace = {NULL, NULL, 148, LOCATE_partial_order___PartialOrder___new_poe};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 =  param1;
-  variable2 = NEW_partial_order___PartialOrderElement___init( self,  variable0 /*e*/,  variable1 /*directs*/); /*new PartialOrderElement[E]*/
-  goto return_label19;
-  return_label19: while(false);
-  tracehead = trace.prev;
-  return variable2;
-}
-val_t partial_order___PartialOrder___add_to_smallests(val_t  self, val_t  param0, val_t  param1, val_t  param2) {
-  struct trace_t trace = {NULL, NULL, 154, LOCATE_partial_order___PartialOrder___add_to_smallests};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  val_t variable3;
-  val_t variable4;
-    val_t variable5;
-    val_t variable6;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 =  param1;
-  variable2 =  param2;
-  ((array___AbstractArray___clear_t)CALL( variable2 /*to*/,COLOR_abstract_collection___RemovableCollection___clear))( variable2 /*to*/) /*AbstractArray::clear*/;
-  variable4 = ((partial_order___PartialOrder_____bra_t)CALL( self,COLOR_partial_order___PartialOrder_____bra))( self,  variable0 /*e*/) /*PartialOrder::[]*/;
-  variable3 = variable4;
-  variable4 = ((array___AbstractArray___iterator_t)CALL( variable1 /*from*/,COLOR_abstract_collection___Collection___iterator))( variable1 /*from*/) /*AbstractArray::iterator*/;
-  while (true) { /*for*/
-    variable5 = ((array___ArrayIterator___is_ok_t)CALL(variable4,COLOR_abstract_collection___Iterator___is_ok))(variable4) /*ArrayIterator::is_ok*/;
-    if (!UNTAG_Bool(variable5)) break; /*for*/
-    variable5 = ((array___ArrayIterator___item_t)CALL(variable4,COLOR_abstract_collection___Iterator___item))(variable4) /*ArrayIterator::item*/;
-    variable6 = ((partial_order___PartialOrderElement_____g_t)CALL( variable3 /*poe*/,COLOR_partial_order___PartialOrderElement_____g))( variable3 /*poe*/,  variable5 /*i*/) /*PartialOrderElement::>*/;
-    if (UNTAG_Bool(variable6)) { /*if*/
-      variable3 =  TAG_Bool(false);
-      goto return_label20;
-    }
-    variable6 = ((partial_order___PartialOrderElement_____l_t)CALL( variable3 /*poe*/,COLOR_partial_order___PartialOrderElement_____l))( variable3 /*poe*/,  variable5 /*i*/) /*PartialOrderElement::<*/;
-    if (UNTAG_Bool( TAG_Bool(!UNTAG_Bool(variable6)))) { /*if*/
-      ((array___AbstractArray___add_t)CALL( variable2 /*to*/,COLOR_abstract_collection___SimpleCollection___add))( variable2 /*to*/,  variable5 /*i*/) /*AbstractArray::add*/;
-    }
-    continue_21: while(0);
-    ((array___ArrayIterator___next_t)CALL(variable4,COLOR_abstract_collection___Iterator___next))(variable4) /*ArrayIterator::next*/;
-  }
-  break_21: while(0);
-  ((array___AbstractArray___add_t)CALL( variable2 /*to*/,COLOR_abstract_collection___SimpleCollection___add))( variable2 /*to*/,  variable0 /*e*/) /*AbstractArray::add*/;
-  variable3 =  TAG_Bool(true);
-  goto return_label20;
-  return_label20: while(false);
-  tracehead = trace.prev;
-  return variable3;
-}
-void partial_order___PartialOrder___compute_smallers_for(val_t  self, val_t  param0, val_t  param1) {
-  struct trace_t trace = {NULL, NULL, 175, LOCATE_partial_order___PartialOrder___compute_smallers_for};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  val_t variable3;
-    val_t variable4;
-    val_t variable5;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 =  param1;
-  variable3 = ((partial_order___PartialOrderElement___value_t)CALL( variable0 /*poe*/,COLOR_partial_order___PartialOrderElement___value))( variable0 /*poe*/) /*PartialOrderElement::value*/;
-  variable2 = variable3;
-  variable3 = ATTR_partial_order___PartialOrder____elements( self) /*PartialOrder::_elements*/;
-  variable3 = ((abstract_collection___Map___iterator_t)CALL(variable3,COLOR_abstract_collection___Collection___iterator))(variable3) /*Map::iterator*/;
-  while (true) { /*for*/
-    variable4 = ((abstract_collection___Iterator___is_ok_t)CALL(variable3,COLOR_abstract_collection___Iterator___is_ok))(variable3) /*Iterator::is_ok*/;
-    if (!UNTAG_Bool(variable4)) break; /*for*/
-    variable4 = ((abstract_collection___Iterator___item_t)CALL(variable3,COLOR_abstract_collection___Iterator___item))(variable3) /*Iterator::item*/;
-    variable5 = ((partial_order___PartialOrderElement_____l_t)CALL( variable4 /*s*/,COLOR_partial_order___PartialOrderElement_____l))( variable4 /*s*/,  variable2 /*e*/) /*PartialOrderElement::<*/;
-    if (UNTAG_Bool(variable5)) { /*if*/
-      variable5 = ((partial_order___PartialOrderElement___value_t)CALL( variable4 /*s*/,COLOR_partial_order___PartialOrderElement___value))( variable4 /*s*/) /*PartialOrderElement::value*/;
-      ((abstract_collection___SimpleCollection___add_t)CALL( variable1 /*set*/,COLOR_abstract_collection___SimpleCollection___add))( variable1 /*set*/, variable5) /*SimpleCollection::add*/;
-    }
-    continue_23: while(0);
-    ((abstract_collection___Iterator___next_t)CALL(variable3,COLOR_abstract_collection___Iterator___next))(variable3) /*Iterator::next*/;
-  }
-  break_23: while(0);
-  tracehead = trace.prev;
+val_t partial_order___PartialOrder___roots(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 30;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___roots;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:30 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrder____roots(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_roots", LOCATE_partial_order, 30);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrder____roots(fra.me.REG[0]);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrder___is_empty(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 35;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___is_empty;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:35 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_elements", LOCATE_partial_order, 35);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrder____elements(fra.me.REG[0]);
+  REGB0 = CALL_abstract_collection___Collection___is_empty(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t partial_order___PartialOrder___length(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 37;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___length;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:37 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_elements", LOCATE_partial_order, 37);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrder____elements(fra.me.REG[0]);
+  REGB0 = CALL_abstract_collection___Collection___length(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t partial_order___PartialOrder___first(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 39;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___first;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:39 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrder____elements_list(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_elements_list", LOCATE_partial_order, 39);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrder____elements_list(fra.me.REG[0]);
+  fra.me.REG[0] = CALL_abstract_collection___Collection___first(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrder___has(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 41;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___has;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./metamodel//partial_order.nit:41 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_elements", LOCATE_partial_order, 41);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrder____elements(fra.me.REG[0]);
+  REGB0 = CALL_abstract_collection___MapRead___has_key(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t partial_order___PartialOrder___has_only(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t REGB2;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 43;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___has_only;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./metamodel//partial_order.nit:43 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_elements", LOCATE_partial_order, 43);
+  }
+  fra.me.REG[2] = ATTR_partial_order___PartialOrder____elements(fra.me.REG[0]);
+  REGB0 = CALL_abstract_collection___Collection___length(fra.me.REG[2])(fra.me.REG[2]);
+  REGB1 = TAG_Int(1);
+  REGB2 = TAG_Bool(IS_EQUAL_OO(REGB0,REGB1));
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    /* ./../lib/standard//kernel.nit:207 */
+    REGB1 = TAG_Bool((REGB0)==(REGB1));
+    /* ./metamodel//partial_order.nit:43 */
+    REGB2 = REGB1;
+  }
+  if (UNTAG_Bool(REGB2)) {
+    REGB2 = TAG_Bool(ATTR_partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_elements", LOCATE_partial_order, 43);
+    }
+    fra.me.REG[0] = ATTR_partial_order___PartialOrder____elements(fra.me.REG[0]);
+    fra.me.REG[0] = CALL_abstract_collection___Collection___first(fra.me.REG[0])(fra.me.REG[0]);
+    REGB2 = TAG_Bool(IS_EQUAL_ON(fra.me.REG[1],fra.me.REG[0]));
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      REGB1 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
+      if (UNTAG_Bool(REGB1)) {
+        REGB1 = TAG_Bool(false);
+        REGB2 = REGB1;
+      } else {
+        REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+        REGB2 = REGB1;
+      }
+    }
+  } else {
+    REGB1 = TAG_Bool(false);
+    REGB2 = REGB1;
+  }
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB2;
+}
+val_t partial_order___PartialOrder___count(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 45;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___count;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./metamodel//partial_order.nit:47 */
+  REGB0 = CALL_abstract_collection___Collection___has(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  if (UNTAG_Bool(REGB0)) {
+    /* ./metamodel//partial_order.nit:48 */
+    REGB0 = TAG_Int(1);
+    goto label1;
+  } else {
+    /* ./metamodel//partial_order.nit:50 */
+    REGB1 = TAG_Int(0);
+    REGB0 = REGB1;
+    goto label1;
+  }
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t partial_order___PartialOrder___iterator(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 54;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___iterator;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:54 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrder____elements_list(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_elements_list", LOCATE_partial_order, 54);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrder____elements_list(fra.me.REG[0]);
+  fra.me.REG[0] = CALL_abstract_collection___Collection___iterator(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrder_____bra(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 58;
+  fra.me.meth = LOCATE_partial_order___PartialOrder_____bra;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./metamodel//partial_order.nit:61 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_elements", LOCATE_partial_order, 61);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrder____elements(fra.me.REG[0]);
+  fra.me.REG[1] = CALL_abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[1];
+}
+val_t partial_order___PartialOrder___to_dot(val_t p0){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t tmp;
+  static val_t once_value_3; /* Once value */
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 64;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___to_dot;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:67 */
+  fra.me.REG[1] = NEW_Buffer_string___Buffer___init();
+  /* ./metamodel//partial_order.nit:68 */
+  fra.me.REG[2] = CALL_partial_order___PartialOrder___to_dot_header(fra.me.REG[0])(fra.me.REG[0]);
+  CALL_abstract_collection___Sequence___append(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[2]);
+  /* ./metamodel//partial_order.nit:69 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_elements", LOCATE_partial_order, 69);
+  }
+  fra.me.REG[2] = ATTR_partial_order___PartialOrder____elements(fra.me.REG[0]);
+  CALL_abstract_collection___Collection___iterate(fra.me.REG[2])(fra.me.REG[2], (&(fra.me)), ((fun_t)OC_partial_order___PartialOrder___to_dot_1));
+  /* ./metamodel//partial_order.nit:75 */
+  if (!once_value_3) {
+    fra.me.REG[0] = BOX_NativeString("}\n");
+    REGB0 = TAG_Int(2);
+    fra.me.REG[0] = NEW_String_string___String___with_native(fra.me.REG[0], REGB0);
+    once_value_3 = fra.me.REG[0];
+    register_static_object(&once_value_3);
+  } else fra.me.REG[0] = once_value_3;
+  fra.me.REG[0] = fra.me.REG[0];
+  CALL_abstract_collection___Sequence___append(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[0]);
+  /* ./metamodel//partial_order.nit:76 */
+  fra.me.REG[1] = CALL_string___Object___to_s(fra.me.REG[1])(fra.me.REG[1]);
+  goto label4;
+  label4: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[1];
+}
+  void OC_partial_order___PartialOrder___to_dot_1(struct stack_frame_t *closctx, val_t p0, struct stack_frame_t *closctx_param, fun_t clos_fun0){
+    struct {struct stack_frame_t me; val_t MORE_REG[4];} fra;
+    val_t REGB0;
+    val_t REGB1;
+    fun_t CREG[1];
+    val_t tmp;
+    fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+    fra.me.file = LOCATE_partial_order;
+    fra.me.line = 0;
+    fra.me.meth = LOCATE_partial_order___PartialOrder___to_dot;
+    fra.me.has_broke = 0;
+    fra.me.REG_size = 5;
+    fra.me.REG[0] = NIT_NULL;
+    fra.me.REG[1] = NIT_NULL;
+    fra.me.REG[2] = NIT_NULL;
+    fra.me.REG[3] = NIT_NULL;
+    fra.me.REG[4] = NIT_NULL;
+    fra.me.closure_ctx = closctx_param;
+    fra.me.closure_funs = CREG;
+    fra.me.REG[0] = p0;
+    CREG[0] = clos_fun0;
+    /* ./metamodel//partial_order.nit:70 */
+    fra.me.REG[1] = CALL_partial_order___PartialOrderElement___value(fra.me.REG[0])(fra.me.REG[0]);
+    fra.me.REG[1] = CALL_partial_order___PartialOrder___to_dot_node(closctx->REG[0])(closctx->REG[0], fra.me.REG[1]);
+    CALL_abstract_collection___Sequence___append(closctx->REG[1])(closctx->REG[1], fra.me.REG[1]);
+    /* ./metamodel//partial_order.nit:71 */
+    fra.me.REG[1] = CALL_partial_order___PartialOrderElement___direct_greaters(fra.me.REG[0])(fra.me.REG[0]);
+    /* ./../lib/standard//collection//array.nit:234 */
+    REGB0 = TAG_Int(0);
+    /* ./../lib/standard//collection//array.nit:235 */
+    REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 235);
+    }
+    REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[1]);
+    /* ./../lib/standard//collection//array.nit:236 */
+    fra.me.REG[2] = ATTR_array___Array____items(fra.me.REG[1]);
+    /* ./../lib/standard//collection//array.nit:237 */
+    while(1) {
+      /* ./../lib/standard//collection//array.nit:23 */
+      REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
+      if (UNTAG_Bool(REGB1)) {
+      } else {
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
+      }
+      REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[1]);
+      /* ./../lib/standard//kernel.nit:212 */
+      REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
+      /* ./../lib/standard//collection//array.nit:237 */
+      if (UNTAG_Bool(REGB1)) {
+        /* ./../lib/standard//collection//array.nit:238 */
+        REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+        if (UNTAG_Bool(REGB1)) {
+          nit_abort("Reciever is null", NULL, LOCATE_array, 238);
+        }
+        /* ./../lib/standard//collection//array.nit:654 */
+        fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
+        /* ./metamodel//partial_order.nit:72 */
+        fra.me.REG[4] = CALL_partial_order___PartialOrderElement___value(fra.me.REG[0])(fra.me.REG[0]);
+        fra.me.REG[3] = CALL_partial_order___PartialOrder___to_dot_edge(closctx->REG[0])(closctx->REG[0], fra.me.REG[4], fra.me.REG[3]);
+        CALL_abstract_collection___Sequence___append(closctx->REG[1])(closctx->REG[1], fra.me.REG[3]);
+        /* ./../lib/standard//collection//array.nit:239 */
+        REGB1 = TAG_Int(1);
+        /* ./../lib/standard//kernel.nit:215 */
+        REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
+        /* ./../lib/standard//collection//array.nit:239 */
+        REGB0 = REGB1;
+      } else {
+        /* ./../lib/standard//collection//array.nit:237 */
+        goto label2;
+      }
+    }
+    label2: while(0);
+    stack_frame_head = fra.me.prev;
+    return;
+  }
+val_t partial_order___PartialOrder___to_dot_header(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  static val_t once_value_1; /* Once value */
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 79;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___to_dot_header;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:82 */
+  if (!once_value_1) {
+    fra.me.REG[0] = BOX_NativeString("digraph G {\ngraph [rankdir=BT];\n");
+    REGB0 = TAG_Int(32);
+    fra.me.REG[0] = NEW_String_string___String___with_native(fra.me.REG[0], REGB0);
+    once_value_1 = fra.me.REG[0];
+    register_static_object(&once_value_1);
+  } else fra.me.REG[0] = once_value_1;
+  fra.me.REG[0] = fra.me.REG[0];
+  goto label2;
+  label2: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrder___to_dot_node(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t tmp;
+  static val_t once_value_1; /* Once value */
+  static val_t once_value_2; /* Once value */
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 85;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___to_dot_node;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./metamodel//partial_order.nit:88 */
+  REGB0 = TAG_Int(3);
+  fra.me.REG[0] = NEW_Array_array___Array___with_capacity(REGB0);
+  if (!once_value_1) {
+    fra.me.REG[2] = BOX_NativeString("\"");
+    REGB0 = TAG_Int(1);
+    fra.me.REG[2] = NEW_String_string___String___with_native(fra.me.REG[2], REGB0);
+    once_value_1 = fra.me.REG[2];
+    register_static_object(&once_value_1);
+  } else fra.me.REG[2] = once_value_1;
+  fra.me.REG[2] = fra.me.REG[2];
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[2]);
+  fra.me.REG[1] = CALL_string___Object___to_s(fra.me.REG[1])(fra.me.REG[1]);
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  if (!once_value_2) {
+    fra.me.REG[1] = BOX_NativeString("\";\n");
+    REGB0 = TAG_Int(3);
+    fra.me.REG[1] = NEW_String_string___String___with_native(fra.me.REG[1], REGB0);
+    once_value_2 = fra.me.REG[1];
+    register_static_object(&once_value_2);
+  } else fra.me.REG[1] = once_value_2;
+  fra.me.REG[1] = fra.me.REG[1];
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  fra.me.REG[0] = CALL_string___Object___to_s(fra.me.REG[0])(fra.me.REG[0]);
+  goto label3;
+  label3: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrder___to_dot_edge(val_t p0, val_t p1, val_t p2){
+  struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
+  val_t REGB0;
+  val_t tmp;
+  static val_t once_value_1; /* Once value */
+  static val_t once_value_2; /* Once value */
+  static val_t once_value_3; /* Once value */
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 91;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___to_dot_edge;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 4;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[3] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[2] = p2;
+  /* ./metamodel//partial_order.nit:94 */
+  REGB0 = TAG_Int(5);
+  fra.me.REG[0] = NEW_Array_array___Array___with_capacity(REGB0);
+  if (!once_value_1) {
+    fra.me.REG[3] = BOX_NativeString("\"");
+    REGB0 = TAG_Int(1);
+    fra.me.REG[3] = NEW_String_string___String___with_native(fra.me.REG[3], REGB0);
+    once_value_1 = fra.me.REG[3];
+    register_static_object(&once_value_1);
+  } else fra.me.REG[3] = once_value_1;
+  fra.me.REG[3] = fra.me.REG[3];
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[3]);
+  fra.me.REG[1] = CALL_string___Object___to_s(fra.me.REG[1])(fra.me.REG[1]);
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  if (!once_value_2) {
+    fra.me.REG[1] = BOX_NativeString("\" -> \"");
+    REGB0 = TAG_Int(6);
+    fra.me.REG[1] = NEW_String_string___String___with_native(fra.me.REG[1], REGB0);
+    once_value_2 = fra.me.REG[1];
+    register_static_object(&once_value_2);
+  } else fra.me.REG[1] = once_value_2;
+  fra.me.REG[1] = fra.me.REG[1];
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  fra.me.REG[2] = CALL_string___Object___to_s(fra.me.REG[2])(fra.me.REG[2]);
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[2]);
+  if (!once_value_3) {
+    fra.me.REG[2] = BOX_NativeString("\";\n");
+    REGB0 = TAG_Int(3);
+    fra.me.REG[2] = NEW_String_string___String___with_native(fra.me.REG[2], REGB0);
+    once_value_3 = fra.me.REG[2];
+    register_static_object(&once_value_3);
+  } else fra.me.REG[2] = once_value_3;
+  fra.me.REG[2] = fra.me.REG[2];
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[2]);
+  fra.me.REG[0] = CALL_string___Object___to_s(fra.me.REG[0])(fra.me.REG[0]);
+  goto label4;
+  label4: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrder___select_smallests(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[4];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 97;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___select_smallests;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 5;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[3] = NIT_NULL;
+  fra.me.REG[4] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./metamodel//partial_order.nit:100 */
+  REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+      REGB1 = TAG_Bool(false);
+      REGB0 = REGB1;
+    } else {
+      REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[1])(fra.me.REG[1], NIT_NULL);
+      REGB0 = REGB1;
+    }
+  }
+  if (UNTAG_Bool(REGB0)) {
+    fra.me.REG[2] = NEW_Array_array___Array___init();
+    goto label1;
+  }
+  /* ./metamodel//partial_order.nit:101 */
+  REGB0 = CALL_partial_order___PartialOrder___has_all(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Assert failed", NULL, LOCATE_partial_order, 101);
+  }
+  /* ./metamodel//partial_order.nit:102 */
+  REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+    nit_abort("Reciever is null", NULL, LOCATE_partial_order, 102);
+  }
+  REGB0 = CALL_abstract_collection___Collection___length(fra.me.REG[1])(fra.me.REG[1]);
+  fra.me.REG[3] = NEW_Array_array___Array___with_capacity(REGB0);
+  /* ./metamodel//partial_order.nit:103 */
+  REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+    nit_abort("Reciever is null", NULL, LOCATE_partial_order, 103);
+  }
+  REGB0 = CALL_abstract_collection___Collection___length(fra.me.REG[1])(fra.me.REG[1]);
+  fra.me.REG[4] = NEW_Array_array___Array___with_capacity(REGB0);
+  /* ./metamodel//partial_order.nit:104 */
+  REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+    nit_abort("Reciever is null", NULL, LOCATE_partial_order, 104);
+  }
+  CALL_abstract_collection___Collection___iterate(fra.me.REG[1])(fra.me.REG[1], (&(fra.me)), ((fun_t)OC_partial_order___PartialOrder___select_smallests_2));
+  /* ./metamodel//partial_order.nit:115 */
+  fra.me.REG[2] = fra.me.REG[3];
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[2];
+}
+  void OC_partial_order___PartialOrder___select_smallests_2(struct stack_frame_t *closctx, val_t p0, struct stack_frame_t *closctx_param, fun_t clos_fun0){
+    struct {struct stack_frame_t me;} fra;
+    val_t REGB0;
+    fun_t CREG[1];
+    val_t tmp;
+    fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+    fra.me.file = LOCATE_partial_order;
+    fra.me.line = 0;
+    fra.me.meth = LOCATE_partial_order___PartialOrder___select_smallests;
+    fra.me.has_broke = 0;
+    fra.me.REG_size = 1;
+    fra.me.REG[0] = NIT_NULL;
+    fra.me.closure_ctx = closctx_param;
+    fra.me.closure_funs = CREG;
+    fra.me.REG[0] = p0;
+    CREG[0] = clos_fun0;
+    /* ./metamodel//partial_order.nit:106 */
+    REGB0 = CALL_partial_order___PartialOrder___add_to_smallests(closctx->REG[0])(closctx->REG[0], fra.me.REG[0], closctx->REG[3], closctx->REG[4]);
+    /* ./metamodel//partial_order.nit:107 */
+    if (UNTAG_Bool(REGB0)) {
+      /* ./metamodel//partial_order.nit:110 */
+      fra.me.REG[0] = closctx->REG[4];
+      /* ./metamodel//partial_order.nit:111 */
+      closctx->REG[4] = closctx->REG[3];
+      /* ./metamodel//partial_order.nit:112 */
+      closctx->REG[3] = fra.me.REG[0];
+    }
+    stack_frame_head = fra.me.prev;
+    return;
+  }
+val_t partial_order___PartialOrder___add(val_t p0, val_t p1, val_t p2){
+  struct {struct stack_frame_t me; val_t MORE_REG[4];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 118;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___add;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 5;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[3] = NIT_NULL;
+  fra.me.REG[4] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[2] = p2;
+  /* ./metamodel//partial_order.nit:121 */
+  REGB0 = CALL_abstract_collection___Collection___has(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  REGB0 = TAG_Bool(!UNTAG_Bool(REGB0));
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Assert failed", NULL, LOCATE_partial_order, 121);
+  }
+  /* ./metamodel//partial_order.nit:122 */
+  REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+      REGB1 = TAG_Bool(false);
+      REGB0 = REGB1;
+    } else {
+      REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], NIT_NULL);
+      REGB0 = REGB1;
+    }
+  }
+  if (UNTAG_Bool(REGB0)) {
+    REGB0 = TAG_Bool(true);
+  } else {
+    REGB1 = CALL_partial_order___PartialOrder___has_all(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[2]);
+    REGB0 = REGB1;
+  }
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Assert failed", NULL, LOCATE_partial_order, 122);
+  }
+  /* ./metamodel//partial_order.nit:123 */
+  fra.me.REG[3] = CALL_partial_order___PartialOrder___select_smallests(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[2]);
+  /* ./metamodel//partial_order.nit:124 */
+  fra.me.REG[3] = CALL_partial_order___PartialOrder___new_poe(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], fra.me.REG[3]);
+  /* ./metamodel//partial_order.nit:125 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_elements", LOCATE_partial_order, 125);
+  }
+  fra.me.REG[4] = ATTR_partial_order___PartialOrder____elements(fra.me.REG[0]);
+  CALL_abstract_collection___Map_____braeq(fra.me.REG[4])(fra.me.REG[4], fra.me.REG[1], fra.me.REG[3]);
+  /* ./metamodel//partial_order.nit:126 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrder____elements_list(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_elements_list", LOCATE_partial_order, 126);
+  }
+  fra.me.REG[4] = ATTR_partial_order___PartialOrder____elements_list(fra.me.REG[0]);
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[4])(fra.me.REG[4], fra.me.REG[1]);
+  /* ./metamodel//partial_order.nit:127 */
+  REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+      REGB1 = TAG_Bool(false);
+      REGB0 = REGB1;
+    } else {
+      REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], NIT_NULL);
+      REGB0 = REGB1;
+    }
+  }
+  if (UNTAG_Bool(REGB0)) {
+    REGB0 = TAG_Bool(true);
+  } else {
+    REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+      nit_abort("Reciever is null", NULL, LOCATE_partial_order, 127);
+    }
+    REGB1 = CALL_abstract_collection___Collection___is_empty(fra.me.REG[2])(fra.me.REG[2]);
+    REGB0 = REGB1;
+  }
+  if (UNTAG_Bool(REGB0)) {
+    /* ./metamodel//partial_order.nit:128 */
+    REGB0 = TAG_Bool(ATTR_partial_order___PartialOrder____roots(fra.me.REG[0])!=NIT_NULL);
+    if (UNTAG_Bool(REGB0)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_roots", LOCATE_partial_order, 128);
+    }
+    fra.me.REG[0] = ATTR_partial_order___PartialOrder____roots(fra.me.REG[0]);
+    CALL_abstract_collection___SimpleCollection___add(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  }
+  /* ./metamodel//partial_order.nit:130 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[3];
+}
+val_t partial_order___PartialOrder___has_all(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 133;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___has_all;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  CALL_abstract_collection___Collection___iterate(fra.me.REG[1])(fra.me.REG[1], (&(fra.me)), ((fun_t)OC_partial_order___PartialOrder___has_all_1));
+  switch ((&(fra.me))->has_broke) {
+    case 0: break;
+    case 1: (&(fra.me))->has_broke = 0; goto label3;
+  }
+  /* ./metamodel//partial_order.nit:141 */
+  REGB0 = TAG_Bool(true);
+  fra.me.REG[1] = REGB0;
+  goto label3;
+  label3: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[1];
+}
+  void OC_partial_order___PartialOrder___has_all_1(struct stack_frame_t *closctx, val_t p0, struct stack_frame_t *closctx_param, fun_t clos_fun0){
+    struct {struct stack_frame_t me;} fra;
+    val_t REGB0;
+    fun_t CREG[1];
+    val_t tmp;
+    /* ./metamodel//partial_order.nit:136 */
+    fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+    fra.me.file = LOCATE_partial_order;
+    fra.me.line = 0;
+    fra.me.meth = LOCATE_partial_order___PartialOrder___has_all;
+    fra.me.has_broke = 0;
+    fra.me.REG_size = 1;
+    fra.me.REG[0] = NIT_NULL;
+    fra.me.closure_ctx = closctx_param;
+    fra.me.closure_funs = CREG;
+    fra.me.REG[0] = p0;
+    CREG[0] = clos_fun0;
+    /* ./metamodel//partial_order.nit:137 */
+    REGB0 = CALL_abstract_collection___Collection___has(closctx->REG[0])(closctx->REG[0], fra.me.REG[0]);
+    REGB0 = TAG_Bool(!UNTAG_Bool(REGB0));
+    if (UNTAG_Bool(REGB0)) {
+      /* ./metamodel//partial_order.nit:138 */
+      REGB0 = TAG_Bool(false);
+      closctx->REG[1] = REGB0;
+      closctx->has_broke = 1;
+      goto label2;
+    }
+    label2: while(0);
+    stack_frame_head = fra.me.prev;
+    return;
+  }
+val_t partial_order___PartialOrder___new_poe(val_t p0, val_t p1, val_t p2){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 144;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___new_poe;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[2] = p2;
+  /* ./metamodel//partial_order.nit:147 */
+  fra.me.REG[2] = NEW_PartialOrderElement_partial_order___PartialOrderElement___init(fra.me.REG[0], fra.me.REG[1], fra.me.REG[2]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[2];
+}
+val_t partial_order___PartialOrder___add_to_smallests(val_t p0, val_t p1, val_t p2, val_t p3){
+  struct {struct stack_frame_t me; val_t MORE_REG[5];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t REGB2;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 150;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___add_to_smallests;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 6;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[3] = NIT_NULL;
+  fra.me.REG[4] = NIT_NULL;
+  fra.me.REG[5] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[2] = p2;
+  fra.me.REG[3] = p3;
+  /* ./metamodel//partial_order.nit:157 */
+  CALL_abstract_collection___RemovableCollection___clear(fra.me.REG[3])(fra.me.REG[3]);
+  /* ./metamodel//partial_order.nit:158 */
+  fra.me.REG[0] = CALL_partial_order___PartialOrder_____bra(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  /* ./../lib/standard//collection//array.nit:234 */
+  REGB0 = TAG_Int(0);
+  /* ./../lib/standard//collection//array.nit:235 */
+  REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+  if (UNTAG_Bool(REGB1)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 235);
+  }
+  REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[2]);
+  /* ./../lib/standard//collection//array.nit:236 */
+  fra.me.REG[4] = ATTR_array___Array____items(fra.me.REG[2]);
+  /* ./../lib/standard//collection//array.nit:237 */
+  while(1) {
+    /* ./../lib/standard//collection//array.nit:23 */
+    REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
+    }
+    REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[2]);
+    /* ./../lib/standard//kernel.nit:212 */
+    REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
+    /* ./../lib/standard//collection//array.nit:237 */
+    if (UNTAG_Bool(REGB1)) {
+      /* ./../lib/standard//collection//array.nit:238 */
+      REGB1 = TAG_Bool(fra.me.REG[4]==NIT_NULL);
+      if (UNTAG_Bool(REGB1)) {
+        nit_abort("Reciever is null", NULL, LOCATE_array, 238);
+      }
+      /* ./../lib/standard//collection//array.nit:654 */
+      fra.me.REG[5] = ((Nit_NativeArray)fra.me.REG[4])->val[UNTAG_Int(REGB0)];
+      /* ./metamodel//partial_order.nit:160 */
+      REGB1 = CALL_partial_order___PartialOrderElement_____g(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[5]);
+      if (UNTAG_Bool(REGB1)) {
+        /* ./metamodel//partial_order.nit:161 */
+        REGB1 = TAG_Bool(false);
+        goto label1;
+      }
+      /* ./metamodel//partial_order.nit:163 */
+      REGB2 = CALL_partial_order___PartialOrderElement_____l(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[5]);
+      REGB2 = TAG_Bool(!UNTAG_Bool(REGB2));
+      if (UNTAG_Bool(REGB2)) {
+        /* ./metamodel//partial_order.nit:164 */
+        CALL_abstract_collection___SimpleCollection___add(fra.me.REG[3])(fra.me.REG[3], fra.me.REG[5]);
+      }
+      /* ./../lib/standard//collection//array.nit:239 */
+      REGB2 = TAG_Int(1);
+      /* ./../lib/standard//kernel.nit:215 */
+      REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
+      /* ./../lib/standard//collection//array.nit:239 */
+      REGB0 = REGB2;
+    } else {
+      /* ./../lib/standard//collection//array.nit:237 */
+      goto label2;
+    }
+  }
+  label2: while(0);
+  /* ./metamodel//partial_order.nit:167 */
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[3])(fra.me.REG[3], fra.me.REG[1]);
+  /* ./metamodel//partial_order.nit:168 */
+  REGB0 = TAG_Bool(true);
+  REGB1 = REGB0;
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB1;
+}
+void partial_order___PartialOrder___compute_smallers_for(val_t p0, val_t p1, val_t p2){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 171;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___compute_smallers_for;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[2] = p2;
+  /* ./metamodel//partial_order.nit:173 */
+  fra.me.REG[1] = CALL_partial_order___PartialOrderElement___value(fra.me.REG[1])(fra.me.REG[1]);
+  /* ./metamodel//partial_order.nit:174 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_elements", LOCATE_partial_order, 174);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrder____elements(fra.me.REG[0]);
+  CALL_abstract_collection___Collection___iterate(fra.me.REG[0])(fra.me.REG[0], (&(fra.me)), ((fun_t)OC_partial_order___PartialOrder___compute_smallers_for_1));
+  stack_frame_head = fra.me.prev;
   return;
 }
-void partial_order___PartialOrder___init(val_t  self, int* init_table) {
-  struct trace_t trace = {NULL, NULL, 185, LOCATE_partial_order___PartialOrder___init};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  if (init_table[VAL2OBJ( self)->vft[INIT_TABLE_POS_PartialOrder].i]) return;
-  variable0 = NEW_hash___HashMap___init(); /*new HashMap[K, V]*/
-  ATTR_partial_order___PartialOrder____elements( self) /*PartialOrder::_elements*/ = variable0;
-  variable0 = NEW_array___Array___init(); /*new Array[E]*/
-  ATTR_partial_order___PartialOrder____elements_list( self) /*PartialOrder::_elements_list*/ = variable0;
-  variable0 = NEW_array___Array___init(); /*new Array[E]*/
-  ATTR_partial_order___PartialOrder____roots( self) /*PartialOrder::_roots*/ = variable0;
-  init_table[VAL2OBJ( self)->vft[INIT_TABLE_POS_PartialOrder].i] = 1;
-  tracehead = trace.prev;
+  void OC_partial_order___PartialOrder___compute_smallers_for_1(struct stack_frame_t *closctx, val_t p0, struct stack_frame_t *closctx_param, fun_t clos_fun0){
+    struct {struct stack_frame_t me;} fra;
+    val_t REGB0;
+    fun_t CREG[1];
+    val_t tmp;
+    fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+    fra.me.file = LOCATE_partial_order;
+    fra.me.line = 0;
+    fra.me.meth = LOCATE_partial_order___PartialOrder___compute_smallers_for;
+    fra.me.has_broke = 0;
+    fra.me.REG_size = 1;
+    fra.me.REG[0] = NIT_NULL;
+    fra.me.closure_ctx = closctx_param;
+    fra.me.closure_funs = CREG;
+    fra.me.REG[0] = p0;
+    CREG[0] = clos_fun0;
+    /* ./metamodel//partial_order.nit:175 */
+    REGB0 = CALL_partial_order___PartialOrderElement_____l(fra.me.REG[0])(fra.me.REG[0], closctx->REG[1]);
+    if (UNTAG_Bool(REGB0)) {
+      /* ./metamodel//partial_order.nit:176 */
+      fra.me.REG[0] = CALL_partial_order___PartialOrderElement___value(fra.me.REG[0])(fra.me.REG[0]);
+      CALL_abstract_collection___SimpleCollection___add(closctx->REG[2])(closctx->REG[2], fra.me.REG[0]);
+    }
+    stack_frame_head = fra.me.prev;
+    return;
+  }
+void partial_order___PartialOrder___init(val_t p0, int* init_table){
+  int itpos0 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_PartialOrder].i;
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  if (init_table[itpos0]) return;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 181;
+  fra.me.meth = LOCATE_partial_order___PartialOrder___init;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:183 */
+  fra.me.REG[1] = NEW_HashMap_hash_collection___HashMap___init();
+  ATTR_partial_order___PartialOrder____elements(fra.me.REG[0]) = fra.me.REG[1];
+  /* ./metamodel//partial_order.nit:184 */
+  fra.me.REG[1] = NEW_Array_array___Array___init();
+  ATTR_partial_order___PartialOrder____elements_list(fra.me.REG[0]) = fra.me.REG[1];
+  /* ./metamodel//partial_order.nit:185 */
+  fra.me.REG[1] = NEW_Array_array___Array___init();
+  ATTR_partial_order___PartialOrder____roots(fra.me.REG[0]) = fra.me.REG[1];
+  stack_frame_head = fra.me.prev;
+  init_table[itpos0] = 1;
   return;
 }
-val_t partial_order___PartialOrderElement___order(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 194, LOCATE_partial_order___PartialOrderElement___order};
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  tracehead = trace.prev;
-  return ATTR_partial_order___PartialOrderElement____order( self) /*PartialOrderElement::_order*/;
-}
-val_t partial_order___PartialOrderElement___value(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 197, LOCATE_partial_order___PartialOrderElement___value};
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  tracehead = trace.prev;
-  return ATTR_partial_order___PartialOrderElement____value( self) /*PartialOrderElement::_value*/;
-}
-val_t partial_order___PartialOrderElement___rank(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 200, LOCATE_partial_order___PartialOrderElement___rank};
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  tracehead = trace.prev;
-  return ATTR_partial_order___PartialOrderElement____rank( self) /*PartialOrderElement::_rank*/;
-}
-val_t partial_order___PartialOrderElement___direct_greaters(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 206, LOCATE_partial_order___PartialOrderElement___direct_greaters};
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  tracehead = trace.prev;
-  return ATTR_partial_order___PartialOrderElement____direct_greaters( self) /*PartialOrderElement::_direct_greaters*/;
-}
-val_t partial_order___PartialOrderElement___direct_smallers(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 209, LOCATE_partial_order___PartialOrderElement___direct_smallers};
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  tracehead = trace.prev;
-  return ATTR_partial_order___PartialOrderElement____direct_smallers( self) /*PartialOrderElement::_direct_smallers*/;
-}
-val_t partial_order___PartialOrderElement___greaters(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 212, LOCATE_partial_order___PartialOrderElement___greaters};
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  tracehead = trace.prev;
-  return ATTR_partial_order___PartialOrderElement____greaters( self) /*PartialOrderElement::_greaters*/;
-}
-val_t partial_order___PartialOrderElement___greaters_and_self(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 218, LOCATE_partial_order___PartialOrderElement___greaters_and_self};
-  val_t variable0;
-    val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 = ATTR_partial_order___PartialOrderElement____greaters_and_self_cache( self) /*PartialOrderElement::_greaters_and_self_cache*/;
-  variable0 = TAG_Bool((variable0 ==  NIT_NULL /*null*/) || ((variable0 != NIT_NULL) && UNTAG_Bool(((array___AbstractArray_____eqeq_t)CALL(variable0,COLOR_kernel___Object_____eqeq))(variable0,  NIT_NULL /*null*/) /*AbstractArray::==*/)));
-  if (UNTAG_Bool(variable0)) { /*if*/
-    variable0 = ATTR_partial_order___PartialOrderElement____greaters( self) /*PartialOrderElement::_greaters*/;
-    variable0 = ((array___Collection___to_a_t)CALL(variable0,COLOR_array___Collection___to_a))(variable0) /*Collection::to_a*/;
-    ATTR_partial_order___PartialOrderElement____greaters_and_self_cache( self) /*PartialOrderElement::_greaters_and_self_cache*/ = variable0;
-    variable0 = ATTR_partial_order___PartialOrderElement____greaters_and_self_cache( self) /*PartialOrderElement::_greaters_and_self_cache*/;
-    variable1 = ATTR_partial_order___PartialOrderElement____value( self) /*PartialOrderElement::_value*/;
-    ((array___AbstractArray___add_t)CALL(variable0,COLOR_abstract_collection___SimpleCollection___add))(variable0, variable1) /*AbstractArray::add*/;
-  }
-  variable0 = ATTR_partial_order___PartialOrderElement____greaters_and_self_cache( self) /*PartialOrderElement::_greaters_and_self_cache*/;
-  goto return_label25;
-  return_label25: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t partial_order___PartialOrderElement___smallers(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 234, LOCATE_partial_order___PartialOrderElement___smallers};
-  val_t variable0;
-  val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 = ATTR_partial_order___PartialOrderElement____smallers_last_length( self) /*PartialOrderElement::_smallers_last_length*/;
-  variable1 = ATTR_partial_order___PartialOrderElement____order( self) /*PartialOrderElement::_order*/;
-  variable1 = ((partial_order___PartialOrder___length_t)CALL(variable1,COLOR_abstract_collection___Collection___length))(variable1) /*PartialOrder::length*/;
-  variable0 = TAG_Bool(UNTAG_Int(variable0)<UNTAG_Int(variable1));
-  if (UNTAG_Bool(variable0)) { /*if*/
-    variable0 = ATTR_partial_order___PartialOrderElement____order( self) /*PartialOrderElement::_order*/;
-    variable1 = ATTR_partial_order___PartialOrderElement____smallers_cache( self) /*PartialOrderElement::_smallers_cache*/;
-    ((partial_order___PartialOrder___compute_smallers_for_t)CALL(variable0,COLOR_partial_order___PartialOrder___compute_smallers_for))(variable0,  self, variable1) /*PartialOrder::compute_smallers_for*/;
-    variable0 = ATTR_partial_order___PartialOrderElement____order( self) /*PartialOrderElement::_order*/;
-    variable0 = ((partial_order___PartialOrder___length_t)CALL(variable0,COLOR_abstract_collection___Collection___length))(variable0) /*PartialOrder::length*/;
-    ATTR_partial_order___PartialOrderElement____smallers_last_length( self) /*PartialOrderElement::_smallers_last_length*/ = variable0;
-  }
-  variable0 = ATTR_partial_order___PartialOrderElement____smallers_cache( self) /*PartialOrderElement::_smallers_cache*/;
-  goto return_label26;
-  return_label26: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t partial_order___PartialOrderElement___linear_extension(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 247, LOCATE_partial_order___PartialOrderElement___linear_extension};
-  val_t variable0;
-    val_t variable1;
-    val_t variable2;
-      val_t variable3;
-      val_t variable4;
-      val_t variable5;
-        val_t variable6;
-        val_t variable7;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 = ATTR_partial_order___PartialOrderElement____linear_extension_cache( self) /*PartialOrderElement::_linear_extension_cache*/;
-  variable0 = TAG_Bool((variable0 ==  NIT_NULL /*null*/) || ((variable0 != NIT_NULL) && UNTAG_Bool(((array___AbstractArray_____eqeq_t)CALL(variable0,COLOR_kernel___Object_____eqeq))(variable0,  NIT_NULL /*null*/) /*AbstractArray::==*/)));
-  if (UNTAG_Bool(variable0)) { /*if*/
-    variable1 = NEW_array___Array___init(); /*new Array[E]*/
-    variable0 = variable1;
-    variable2 = NEW_array___Array___init(); /*new Array[E]*/
-    variable1 = variable2;
-    variable2 = ((partial_order___PartialOrderElement___value_t)CALL( self,COLOR_partial_order___PartialOrderElement___value))( self) /*PartialOrderElement::value*/;
-    ((array___AbstractArray___add_t)CALL( variable0 /*res*/,COLOR_abstract_collection___SimpleCollection___add))( variable0 /*res*/, variable2) /*AbstractArray::add*/;
-    variable2 = ((partial_order___PartialOrderElement___direct_greaters_t)CALL( self,COLOR_partial_order___PartialOrderElement___direct_greaters))( self) /*PartialOrderElement::direct_greaters*/;
-    variable2 = ((array___AbstractArray___iterator_t)CALL(variable2,COLOR_abstract_collection___Collection___iterator))(variable2) /*AbstractArray::iterator*/;
-    while (true) { /*for*/
-      variable3 = ((array___ArrayIterator___is_ok_t)CALL(variable2,COLOR_abstract_collection___Iterator___is_ok))(variable2) /*ArrayIterator::is_ok*/;
-      if (!UNTAG_Bool(variable3)) break; /*for*/
-      variable3 = ((array___ArrayIterator___item_t)CALL(variable2,COLOR_abstract_collection___Iterator___item))(variable2) /*ArrayIterator::item*/;
-      variable5 = ((partial_order___PartialOrderElement___order_t)CALL( self,COLOR_partial_order___PartialOrderElement___order))( self) /*PartialOrderElement::order*/;
-      variable5 = ((partial_order___PartialOrder_____bra_t)CALL(variable5,COLOR_partial_order___PartialOrder_____bra))(variable5,  variable3 /*s*/) /*PartialOrder::[]*/;
-      variable5 = ((partial_order___PartialOrderElement___linear_extension_t)CALL(variable5,COLOR_partial_order___PartialOrderElement___linear_extension))(variable5) /*PartialOrderElement::linear_extension*/;
-      variable4 = variable5;
-      ((array___AbstractArray___clear_t)CALL( variable1 /*res2*/,COLOR_abstract_collection___RemovableCollection___clear))( variable1 /*res2*/) /*AbstractArray::clear*/;
-      variable5 = ((array___AbstractArray___iterator_t)CALL( variable0 /*res*/,COLOR_abstract_collection___Collection___iterator))( variable0 /*res*/) /*AbstractArray::iterator*/;
-      while (true) { /*for*/
-        variable6 = ((array___ArrayIterator___is_ok_t)CALL(variable5,COLOR_abstract_collection___Iterator___is_ok))(variable5) /*ArrayIterator::is_ok*/;
-        if (!UNTAG_Bool(variable6)) break; /*for*/
-        variable6 = ((array___ArrayIterator___item_t)CALL(variable5,COLOR_abstract_collection___Iterator___item))(variable5) /*ArrayIterator::item*/;
-        variable7 = ((array___AbstractArray___has_t)CALL( variable4 /*sl*/,COLOR_abstract_collection___Collection___has))( variable4 /*sl*/,  variable6 /*e*/) /*AbstractArray::has*/;
-        if (UNTAG_Bool( TAG_Bool(!UNTAG_Bool(variable7)))) { /*if*/
-          ((array___AbstractArray___add_t)CALL( variable1 /*res2*/,COLOR_abstract_collection___SimpleCollection___add))( variable1 /*res2*/,  variable6 /*e*/) /*AbstractArray::add*/;
+val_t partial_order___PartialOrderElement___order(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 190;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement___order;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:190 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_order", LOCATE_partial_order, 190);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0]);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrderElement___value(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 193;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement___value;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:193 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____value(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_value", LOCATE_partial_order, 193);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrderElement____value(fra.me.REG[0]);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrderElement___rank(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 196;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement___rank;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:196 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____rank(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_rank", LOCATE_partial_order, 196);
+  }
+  REGB0 = ATTR_partial_order___PartialOrderElement____rank(fra.me.REG[0]);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t partial_order___PartialOrderElement___direct_greaters(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 202;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement___direct_greaters;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:202 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____direct_greaters(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_direct_greaters", LOCATE_partial_order, 202);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrderElement____direct_greaters(fra.me.REG[0]);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrderElement___direct_smallers(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 205;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement___direct_smallers;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:205 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____direct_smallers(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_direct_smallers", LOCATE_partial_order, 205);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrderElement____direct_smallers(fra.me.REG[0]);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrderElement___greaters(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 208;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement___greaters;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:208 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____greaters(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_greaters", LOCATE_partial_order, 208);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrderElement____greaters(fra.me.REG[0]);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrderElement___greaters_and_self(val_t p0){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 214;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement___greaters_and_self;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:217 */
+  fra.me.REG[1] = ATTR_partial_order___PartialOrderElement____greaters_and_self_cache(fra.me.REG[0]);
+  REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+      REGB1 = TAG_Bool(false);
+      REGB0 = REGB1;
+    } else {
+      REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[1])(fra.me.REG[1], NIT_NULL);
+      REGB0 = REGB1;
+    }
+  }
+  if (UNTAG_Bool(REGB0)) {
+    /* ./metamodel//partial_order.nit:218 */
+    REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____greaters(fra.me.REG[0])!=NIT_NULL);
+    if (UNTAG_Bool(REGB0)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_greaters", LOCATE_partial_order, 218);
+    }
+    fra.me.REG[1] = ATTR_partial_order___PartialOrderElement____greaters(fra.me.REG[0]);
+    fra.me.REG[1] = CALL_array___Collection___to_a(fra.me.REG[1])(fra.me.REG[1]);
+    ATTR_partial_order___PartialOrderElement____greaters_and_self_cache(fra.me.REG[0]) = fra.me.REG[1];
+    /* ./metamodel//partial_order.nit:219 */
+    fra.me.REG[1] = ATTR_partial_order___PartialOrderElement____greaters_and_self_cache(fra.me.REG[0]);
+    REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____value(fra.me.REG[0])!=NIT_NULL);
+    if (UNTAG_Bool(REGB0)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_value", LOCATE_partial_order, 219);
+    }
+    fra.me.REG[2] = ATTR_partial_order___PartialOrderElement____value(fra.me.REG[0]);
+    REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+    if (UNTAG_Bool(REGB0)) {
+      nit_abort("Reciever is null", NULL, LOCATE_partial_order, 219);
+    }
+    CALL_abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[2]);
+  }
+  /* ./metamodel//partial_order.nit:221 */
+  fra.me.REG[0] = ATTR_partial_order___PartialOrderElement____greaters_and_self_cache(fra.me.REG[0]);
+  REGB0 = TAG_Bool(fra.me.REG[0]!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_partial_order, 221);
+  }
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrderElement___smallers(val_t p0){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 230;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement___smallers;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:233 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____smallers_last_length(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_smallers_last_length", LOCATE_partial_order, 233);
+  }
+  REGB0 = ATTR_partial_order___PartialOrderElement____smallers_last_length(fra.me.REG[0]);
+  REGB1 = TAG_Bool(ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB1)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_order", LOCATE_partial_order, 233);
+  }
+  fra.me.REG[1] = ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0]);
+  REGB1 = CALL_abstract_collection___Collection___length(fra.me.REG[1])(fra.me.REG[1]);
+  /* ./../lib/standard//kernel.nit:212 */
+  REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
+  /* ./metamodel//partial_order.nit:233 */
+  if (UNTAG_Bool(REGB1)) {
+    /* ./metamodel//partial_order.nit:234 */
+    REGB1 = TAG_Bool(ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_order", LOCATE_partial_order, 234);
+    }
+    fra.me.REG[1] = ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0]);
+    REGB1 = TAG_Bool(ATTR_partial_order___PartialOrderElement____smallers_cache(fra.me.REG[0])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_smallers_cache", LOCATE_partial_order, 234);
+    }
+    fra.me.REG[2] = ATTR_partial_order___PartialOrderElement____smallers_cache(fra.me.REG[0]);
+    CALL_partial_order___PartialOrder___compute_smallers_for(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[0], fra.me.REG[2]);
+    /* ./metamodel//partial_order.nit:235 */
+    REGB1 = TAG_Bool(ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_order", LOCATE_partial_order, 235);
+    }
+    fra.me.REG[2] = ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0]);
+    REGB1 = CALL_abstract_collection___Collection___length(fra.me.REG[2])(fra.me.REG[2]);
+    ATTR_partial_order___PartialOrderElement____smallers_last_length(fra.me.REG[0]) = REGB1;
+  }
+  /* ./metamodel//partial_order.nit:237 */
+  REGB1 = TAG_Bool(ATTR_partial_order___PartialOrderElement____smallers_cache(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB1)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_smallers_cache", LOCATE_partial_order, 237);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrderElement____smallers_cache(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrderElement___linear_extension(val_t p0){
+  struct {struct stack_frame_t me; val_t MORE_REG[8];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t REGB2;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 243;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement___linear_extension;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 9;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[3] = NIT_NULL;
+  fra.me.REG[4] = NIT_NULL;
+  fra.me.REG[5] = NIT_NULL;
+  fra.me.REG[6] = NIT_NULL;
+  fra.me.REG[7] = NIT_NULL;
+  fra.me.REG[8] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:247 */
+  fra.me.REG[1] = ATTR_partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[0]);
+  REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+      REGB1 = TAG_Bool(false);
+      REGB0 = REGB1;
+    } else {
+      REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[1])(fra.me.REG[1], NIT_NULL);
+      REGB0 = REGB1;
+    }
+  }
+  if (UNTAG_Bool(REGB0)) {
+    /* ./metamodel//partial_order.nit:248 */
+    fra.me.REG[1] = NEW_Array_array___Array___init();
+    /* ./metamodel//partial_order.nit:249 */
+    fra.me.REG[2] = NEW_Array_array___Array___init();
+    /* ./metamodel//partial_order.nit:250 */
+    fra.me.REG[3] = CALL_partial_order___PartialOrderElement___value(fra.me.REG[0])(fra.me.REG[0]);
+    CALL_abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[3]);
+    /* ./metamodel//partial_order.nit:251 */
+    fra.me.REG[3] = CALL_partial_order___PartialOrderElement___direct_greaters(fra.me.REG[0])(fra.me.REG[0]);
+    /* ./../lib/standard//collection//array.nit:234 */
+    REGB0 = TAG_Int(0);
+    /* ./../lib/standard//collection//array.nit:235 */
+    REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 235);
+    }
+    REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[3]);
+    /* ./../lib/standard//collection//array.nit:236 */
+    fra.me.REG[4] = ATTR_array___Array____items(fra.me.REG[3]);
+    /* ./../lib/standard//collection//array.nit:237 */
+    while(1) {
+      /* ./../lib/standard//collection//array.nit:23 */
+      REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
+      if (UNTAG_Bool(REGB1)) {
+      } else {
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
+      }
+      REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[3]);
+      /* ./../lib/standard//kernel.nit:212 */
+      REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
+      /* ./../lib/standard//collection//array.nit:237 */
+      if (UNTAG_Bool(REGB1)) {
+        /* ./../lib/standard//collection//array.nit:238 */
+        REGB1 = TAG_Bool(fra.me.REG[4]==NIT_NULL);
+        if (UNTAG_Bool(REGB1)) {
+          nit_abort("Reciever is null", NULL, LOCATE_array, 238);
+        }
+        /* ./../lib/standard//collection//array.nit:654 */
+        fra.me.REG[5] = ((Nit_NativeArray)fra.me.REG[4])->val[UNTAG_Int(REGB0)];
+        /* ./metamodel//partial_order.nit:252 */
+        fra.me.REG[6] = CALL_partial_order___PartialOrderElement___order(fra.me.REG[0])(fra.me.REG[0]);
+        fra.me.REG[5] = CALL_partial_order___PartialOrder_____bra(fra.me.REG[6])(fra.me.REG[6], fra.me.REG[5]);
+        fra.me.REG[5] = CALL_partial_order___PartialOrderElement___linear_extension(fra.me.REG[5])(fra.me.REG[5]);
+        /* ./metamodel//partial_order.nit:253 */
+        CALL_abstract_collection___RemovableCollection___clear(fra.me.REG[2])(fra.me.REG[2]);
+        /* ./../lib/standard//collection//array.nit:231 */
+        fra.me.REG[6] = fra.me.REG[1];
+        /* ./../lib/standard//collection//array.nit:234 */
+        REGB1 = TAG_Int(0);
+        /* ./../lib/standard//collection//array.nit:235 */
+        REGB2 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[6])!=NIT_NULL);
+        if (UNTAG_Bool(REGB2)) {
+        } else {
+          nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 235);
+        }
+        REGB2 = ATTR_array___AbstractArrayRead____length(fra.me.REG[6]);
+        /* ./../lib/standard//collection//array.nit:236 */
+        fra.me.REG[7] = ATTR_array___Array____items(fra.me.REG[6]);
+        /* ./../lib/standard//collection//array.nit:237 */
+        while(1) {
+          /* ./../lib/standard//collection//array.nit:23 */
+          REGB2 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[6])!=NIT_NULL);
+          if (UNTAG_Bool(REGB2)) {
+          } else {
+            nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
+          }
+          REGB2 = ATTR_array___AbstractArrayRead____length(fra.me.REG[6]);
+          /* ./../lib/standard//kernel.nit:212 */
+          REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
+          /* ./../lib/standard//collection//array.nit:237 */
+          if (UNTAG_Bool(REGB2)) {
+            /* ./../lib/standard//collection//array.nit:238 */
+            REGB2 = TAG_Bool(fra.me.REG[7]==NIT_NULL);
+            if (UNTAG_Bool(REGB2)) {
+              nit_abort("Reciever is null", NULL, LOCATE_array, 238);
+            }
+            /* ./../lib/standard//collection//array.nit:654 */
+            fra.me.REG[8] = ((Nit_NativeArray)fra.me.REG[7])->val[UNTAG_Int(REGB1)];
+            /* ./metamodel//partial_order.nit:255 */
+            REGB2 = CALL_abstract_collection___Collection___has(fra.me.REG[5])(fra.me.REG[5], fra.me.REG[8]);
+            REGB2 = TAG_Bool(!UNTAG_Bool(REGB2));
+            if (UNTAG_Bool(REGB2)) {
+              CALL_abstract_collection___SimpleCollection___add(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[8]);
+            }
+            /* ./../lib/standard//collection//array.nit:239 */
+            REGB2 = TAG_Int(1);
+            /* ./../lib/standard//kernel.nit:215 */
+            REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
+            /* ./../lib/standard//collection//array.nit:239 */
+            REGB1 = REGB2;
+          } else {
+            /* ./../lib/standard//collection//array.nit:237 */
+            goto label1;
+          }
+        }
+        label1: while(0);
+        /* ./metamodel//partial_order.nit:257 */
+        CALL_abstract_collection___Sequence___append(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[5]);
+        /* ./metamodel//partial_order.nit:259 */
+        fra.me.REG[5] = fra.me.REG[1];
+        /* ./metamodel//partial_order.nit:260 */
+        fra.me.REG[1] = fra.me.REG[2];
+        /* ./metamodel//partial_order.nit:261 */
+        fra.me.REG[2] = fra.me.REG[5];
+        /* ./../lib/standard//collection//array.nit:239 */
+        REGB1 = TAG_Int(1);
+        /* ./../lib/standard//kernel.nit:215 */
+        REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
+        /* ./../lib/standard//collection//array.nit:239 */
+        REGB0 = REGB1;
+      } else {
+        /* ./../lib/standard//collection//array.nit:237 */
+        goto label2;
+      }
+    }
+    label2: while(0);
+    /* ./metamodel//partial_order.nit:263 */
+    ATTR_partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[0]) = fra.me.REG[1];
+  }
+  /* ./metamodel//partial_order.nit:265 */
+  fra.me.REG[0] = ATTR_partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[0]);
+  REGB0 = TAG_Bool(fra.me.REG[0]!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_partial_order, 265);
+  }
+  goto label3;
+  label3: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrderElement___reverse_linear_extension(val_t p0){
+  struct {struct stack_frame_t me; val_t MORE_REG[5];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 271;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement___reverse_linear_extension;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 6;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[3] = NIT_NULL;
+  fra.me.REG[4] = NIT_NULL;
+  fra.me.REG[5] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./metamodel//partial_order.nit:275 */
+  fra.me.REG[1] = ATTR_partial_order___PartialOrderElement____reverse_linear_extension_cache(fra.me.REG[0]);
+  REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+      REGB1 = TAG_Bool(false);
+      REGB0 = REGB1;
+    } else {
+      REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[1])(fra.me.REG[1], NIT_NULL);
+      REGB0 = REGB1;
+    }
+  }
+  if (UNTAG_Bool(REGB0)) {
+    /* ./metamodel//partial_order.nit:276 */
+    fra.me.REG[1] = NEW_HashSet_hash_collection___HashSet___init();
+    /* ./metamodel//partial_order.nit:277 */
+    fra.me.REG[2] = CALL_partial_order___PartialOrderElement___direct_greaters(fra.me.REG[0])(fra.me.REG[0]);
+    /* ./../lib/standard//collection//array.nit:234 */
+    REGB0 = TAG_Int(0);
+    /* ./../lib/standard//collection//array.nit:235 */
+    REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 235);
+    }
+    REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[2]);
+    /* ./../lib/standard//collection//array.nit:236 */
+    fra.me.REG[3] = ATTR_array___Array____items(fra.me.REG[2]);
+    /* ./../lib/standard//collection//array.nit:237 */
+    while(1) {
+      /* ./../lib/standard//collection//array.nit:23 */
+      REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+      if (UNTAG_Bool(REGB1)) {
+      } else {
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
+      }
+      REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[2]);
+      /* ./../lib/standard//kernel.nit:212 */
+      REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
+      /* ./../lib/standard//collection//array.nit:237 */
+      if (UNTAG_Bool(REGB1)) {
+        /* ./../lib/standard//collection//array.nit:238 */
+        REGB1 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
+        if (UNTAG_Bool(REGB1)) {
+          nit_abort("Reciever is null", NULL, LOCATE_array, 238);
         }
-        continue_29: while(0);
-        ((array___ArrayIterator___next_t)CALL(variable5,COLOR_abstract_collection___Iterator___next))(variable5) /*ArrayIterator::next*/;
+        /* ./../lib/standard//collection//array.nit:654 */
+        fra.me.REG[4] = ((Nit_NativeArray)fra.me.REG[3])->val[UNTAG_Int(REGB0)];
+        /* ./metamodel//partial_order.nit:278 */
+        fra.me.REG[5] = CALL_partial_order___PartialOrderElement___order(fra.me.REG[0])(fra.me.REG[0]);
+        fra.me.REG[4] = CALL_partial_order___PartialOrder_____bra(fra.me.REG[5])(fra.me.REG[5], fra.me.REG[4]);
+        fra.me.REG[4] = CALL_partial_order___PartialOrderElement___linear_extension(fra.me.REG[4])(fra.me.REG[4]);
+        /* ./metamodel//partial_order.nit:279 */
+        CALL_abstract_collection___SimpleCollection___add_all(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[4]);
+        /* ./../lib/standard//collection//array.nit:239 */
+        REGB1 = TAG_Int(1);
+        /* ./../lib/standard//kernel.nit:215 */
+        REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
+        /* ./../lib/standard//collection//array.nit:239 */
+        REGB0 = REGB1;
+      } else {
+        /* ./../lib/standard//collection//array.nit:237 */
+        goto label1;
       }
-      break_29: while(0);
-      ((abstract_collection___IndexedCollection___append_t)CALL( variable1 /*res2*/,COLOR_abstract_collection___IndexedCollection___append))( variable1 /*res2*/,  variable4 /*sl*/) /*IndexedCollection::append*/;
-      variable5 =  variable0 /*res*/;
-      variable0 =  variable1 /*res2*/ /*res=*/;
-      variable1 =  variable5 /*tmp*/ /*res2=*/;
-      continue_28: while(0);
-      ((array___ArrayIterator___next_t)CALL(variable2,COLOR_abstract_collection___Iterator___next))(variable2) /*ArrayIterator::next*/;
-    }
-    break_28: while(0);
-    ATTR_partial_order___PartialOrderElement____linear_extension_cache( self) /*PartialOrderElement::_linear_extension_cache*/ =  variable0 /*res*/;
-  }
-  variable0 = ATTR_partial_order___PartialOrderElement____linear_extension_cache( self) /*PartialOrderElement::_linear_extension_cache*/;
-  goto return_label27;
-  return_label27: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t partial_order___PartialOrderElement___reverse_linear_extension(val_t  self) {
-  struct trace_t trace = {NULL, NULL, 275, LOCATE_partial_order___PartialOrderElement___reverse_linear_extension};
-  val_t variable0;
-    val_t variable1;
-      val_t variable2;
-      val_t variable3;
-      val_t variable4;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 = ATTR_partial_order___PartialOrderElement____reverse_linear_extension_cache( self) /*PartialOrderElement::_reverse_linear_extension_cache*/;
-  variable0 = TAG_Bool((variable0 ==  NIT_NULL /*null*/) || ((variable0 != NIT_NULL) && UNTAG_Bool(((array___AbstractArray_____eqeq_t)CALL(variable0,COLOR_kernel___Object_____eqeq))(variable0,  NIT_NULL /*null*/) /*AbstractArray::==*/)));
-  if (UNTAG_Bool(variable0)) { /*if*/
-    variable1 = NEW_hash___HashSet___init(); /*new HashSet[E]*/
-    variable0 = variable1;
-    variable1 = ((partial_order___PartialOrderElement___direct_greaters_t)CALL( self,COLOR_partial_order___PartialOrderElement___direct_greaters))( self) /*PartialOrderElement::direct_greaters*/;
-    variable1 = ((array___AbstractArray___iterator_t)CALL(variable1,COLOR_abstract_collection___Collection___iterator))(variable1) /*AbstractArray::iterator*/;
-    while (true) { /*for*/
-      variable2 = ((array___ArrayIterator___is_ok_t)CALL(variable1,COLOR_abstract_collection___Iterator___is_ok))(variable1) /*ArrayIterator::is_ok*/;
-      if (!UNTAG_Bool(variable2)) break; /*for*/
-      variable2 = ((array___ArrayIterator___item_t)CALL(variable1,COLOR_abstract_collection___Iterator___item))(variable1) /*ArrayIterator::item*/;
-      variable4 = ((partial_order___PartialOrderElement___order_t)CALL( self,COLOR_partial_order___PartialOrderElement___order))( self) /*PartialOrderElement::order*/;
-      variable4 = ((partial_order___PartialOrder_____bra_t)CALL(variable4,COLOR_partial_order___PartialOrder_____bra))(variable4,  variable2 /*s*/) /*PartialOrder::[]*/;
-      variable4 = ((partial_order___PartialOrderElement___linear_extension_t)CALL(variable4,COLOR_partial_order___PartialOrderElement___linear_extension))(variable4) /*PartialOrderElement::linear_extension*/;
-      variable3 = variable4;
-      ((abstract_collection___SimpleCollection___add_all_t)CALL( variable0 /*res*/,COLOR_abstract_collection___SimpleCollection___add_all))( variable0 /*res*/,  variable3 /*sl*/) /*SimpleCollection::add_all*/;
-      continue_31: while(0);
-      ((array___ArrayIterator___next_t)CALL(variable1,COLOR_abstract_collection___Iterator___next))(variable1) /*ArrayIterator::next*/;
-    }
-    break_31: while(0);
-    variable1 = ((partial_order___PartialOrderElement___value_t)CALL( self,COLOR_partial_order___PartialOrderElement___value))( self) /*PartialOrderElement::value*/;
-    ((hash___HashSet___add_t)CALL( variable0 /*res*/,COLOR_abstract_collection___SimpleCollection___add))( variable0 /*res*/, variable1) /*HashSet::add*/;
-    variable1 = ((array___Collection___to_a_t)CALL( variable0 /*res*/,COLOR_array___Collection___to_a))( variable0 /*res*/) /*Collection::to_a*/;
-    ATTR_partial_order___PartialOrderElement____linear_extension_cache( self) /*PartialOrderElement::_linear_extension_cache*/ = variable1;
-  }
-  variable0 = ATTR_partial_order___PartialOrderElement____linear_extension_cache( self) /*PartialOrderElement::_linear_extension_cache*/;
-  goto return_label30;
-  return_label30: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t partial_order___PartialOrderElement_____l(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, NULL, 291, LOCATE_partial_order___PartialOrderElement_____l};
-  val_t variable0;
-  val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 = ATTR_partial_order___PartialOrderElement____greaters( self) /*PartialOrderElement::_greaters*/;
-  variable1 = ((abstract_collection___Collection___has_t)CALL(variable1,COLOR_abstract_collection___Collection___has))(variable1,  variable0 /*o*/) /*Collection::has*/;
-  goto return_label32;
-  return_label32: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t partial_order___PartialOrderElement_____leq(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, NULL, 297, LOCATE_partial_order___PartialOrderElement_____leq};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 = ATTR_partial_order___PartialOrderElement____value( self) /*PartialOrderElement::_value*/;
-  variable1 = TAG_Bool((variable1 ==  variable0 /*o*/) || ((variable1 != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL(variable1,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN(variable1, variable0 /*o*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL(variable1,COLOR_kernel___Object_____eqeq))(variable1,  variable0 /*o*/) /*Object::==*/)))));
-  variable2 = variable1;
-  if (!UNTAG_Bool(variable2)) { /* or */
-    variable2 = ATTR_partial_order___PartialOrderElement____greaters( self) /*PartialOrderElement::_greaters*/;
-    variable2 = ((abstract_collection___Collection___has_t)CALL(variable2,COLOR_abstract_collection___Collection___has))(variable2,  variable0 /*o*/) /*Collection::has*/;
-  }
-  variable1 = variable2;
-  goto return_label33;
-  return_label33: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t partial_order___PartialOrderElement_____g(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, NULL, 303, LOCATE_partial_order___PartialOrderElement_____g};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 = ATTR_partial_order___PartialOrderElement____order( self) /*PartialOrderElement::_order*/;
-  variable1 = ((partial_order___PartialOrder_____bra_t)CALL(variable1,COLOR_partial_order___PartialOrder_____bra))(variable1,  variable0 /*o*/) /*PartialOrder::[]*/;
-  variable2 = ATTR_partial_order___PartialOrderElement____value( self) /*PartialOrderElement::_value*/;
-  variable1 = ((partial_order___PartialOrderElement_____l_t)CALL(variable1,COLOR_partial_order___PartialOrderElement_____l))(variable1, variable2) /*PartialOrderElement::<*/;
-  goto return_label34;
-  return_label34: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t partial_order___PartialOrderElement_____geq(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, NULL, 309, LOCATE_partial_order___PartialOrderElement_____geq};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-    val_t variable3;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 = ATTR_partial_order___PartialOrderElement____value( self) /*PartialOrderElement::_value*/;
-  variable1 = TAG_Bool((variable1 ==  variable0 /*o*/) || ((variable1 != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL(variable1,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN(variable1, variable0 /*o*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL(variable1,COLOR_kernel___Object_____eqeq))(variable1,  variable0 /*o*/) /*Object::==*/)))));
-  variable2 = variable1;
-  if (!UNTAG_Bool(variable2)) { /* or */
-    variable2 = ATTR_partial_order___PartialOrderElement____order( self) /*PartialOrderElement::_order*/;
-    variable2 = ((partial_order___PartialOrder_____bra_t)CALL(variable2,COLOR_partial_order___PartialOrder_____bra))(variable2,  variable0 /*o*/) /*PartialOrder::[]*/;
-    variable3 = ATTR_partial_order___PartialOrderElement____value( self) /*PartialOrderElement::_value*/;
-    variable2 = ((partial_order___PartialOrderElement_____l_t)CALL(variable2,COLOR_partial_order___PartialOrderElement_____l))(variable2, variable3) /*PartialOrderElement::<*/;
-  }
-  variable1 = variable2;
-  goto return_label35;
-  return_label35: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-void partial_order___PartialOrderElement___register_direct_smallers(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, NULL, 315, LOCATE_partial_order___PartialOrderElement___register_direct_smallers};
-  val_t variable0;
-  val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 = ATTR_partial_order___PartialOrderElement____direct_smallers( self) /*PartialOrderElement::_direct_smallers*/;
-  ((array___AbstractArray___add_t)CALL(variable1,COLOR_abstract_collection___SimpleCollection___add))(variable1,  variable0 /*e*/) /*AbstractArray::add*/;
-  tracehead = trace.prev;
+    }
+    label1: while(0);
+    /* ./metamodel//partial_order.nit:281 */
+    fra.me.REG[3] = CALL_partial_order___PartialOrderElement___value(fra.me.REG[0])(fra.me.REG[0]);
+    CALL_abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[3]);
+    /* ./metamodel//partial_order.nit:282 */
+    fra.me.REG[1] = CALL_array___Collection___to_a(fra.me.REG[1])(fra.me.REG[1]);
+    ATTR_partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[0]) = fra.me.REG[1];
+  }
+  /* ./metamodel//partial_order.nit:284 */
+  fra.me.REG[0] = ATTR_partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[0]);
+  REGB0 = TAG_Bool(fra.me.REG[0]!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_partial_order, 284);
+  }
+  goto label2;
+  label2: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t partial_order___PartialOrderElement_____l(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 287;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement_____l;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./metamodel//partial_order.nit:290 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____greaters(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_greaters", LOCATE_partial_order, 290);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrderElement____greaters(fra.me.REG[0]);
+  REGB0 = CALL_abstract_collection___Collection___has(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t partial_order___PartialOrderElement_____leq(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 293;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement_____leq;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./metamodel//partial_order.nit:296 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____value(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_value", LOCATE_partial_order, 296);
+  }
+  fra.me.REG[2] = ATTR_partial_order___PartialOrderElement____value(fra.me.REG[0]);
+  REGB0 = TAG_Bool(IS_EQUAL_OO(fra.me.REG[2],fra.me.REG[1]));
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
+    REGB0 = REGB1;
+  }
+  if (UNTAG_Bool(REGB0)) {
+    REGB0 = TAG_Bool(true);
+  } else {
+    REGB1 = TAG_Bool(ATTR_partial_order___PartialOrderElement____greaters(fra.me.REG[0])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_greaters", LOCATE_partial_order, 296);
+    }
+    fra.me.REG[0] = ATTR_partial_order___PartialOrderElement____greaters(fra.me.REG[0]);
+    REGB1 = CALL_abstract_collection___Collection___has(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+    REGB0 = REGB1;
+  }
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t partial_order___PartialOrderElement_____g(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 299;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement_____g;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./metamodel//partial_order.nit:302 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_order", LOCATE_partial_order, 302);
+  }
+  fra.me.REG[2] = ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0]);
+  fra.me.REG[1] = CALL_partial_order___PartialOrder_____bra(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____value(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_value", LOCATE_partial_order, 302);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrderElement____value(fra.me.REG[0]);
+  REGB0 = CALL_partial_order___PartialOrderElement_____l(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t partial_order___PartialOrderElement_____geq(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 305;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement_____geq;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./metamodel//partial_order.nit:308 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____value(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_value", LOCATE_partial_order, 308);
+  }
+  fra.me.REG[2] = ATTR_partial_order___PartialOrderElement____value(fra.me.REG[0]);
+  REGB0 = TAG_Bool(IS_EQUAL_OO(fra.me.REG[2],fra.me.REG[1]));
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
+    REGB0 = REGB1;
+  }
+  if (UNTAG_Bool(REGB0)) {
+    REGB0 = TAG_Bool(true);
+  } else {
+    REGB1 = TAG_Bool(ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_order", LOCATE_partial_order, 308);
+    }
+    fra.me.REG[2] = ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0]);
+    fra.me.REG[1] = CALL_partial_order___PartialOrder_____bra(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
+    REGB1 = TAG_Bool(ATTR_partial_order___PartialOrderElement____value(fra.me.REG[0])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_value", LOCATE_partial_order, 308);
+    }
+    fra.me.REG[0] = ATTR_partial_order___PartialOrderElement____value(fra.me.REG[0]);
+    REGB1 = CALL_partial_order___PartialOrderElement_____l(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[0]);
+    REGB0 = REGB1;
+  }
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+void partial_order___PartialOrderElement___register_direct_smallers(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 311;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement___register_direct_smallers;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./metamodel//partial_order.nit:313 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____direct_smallers(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_direct_smallers", LOCATE_partial_order, 313);
+  }
+  fra.me.REG[0] = ATTR_partial_order___PartialOrderElement____direct_smallers(fra.me.REG[0]);
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  stack_frame_head = fra.me.prev;
   return;
 }
-void partial_order___PartialOrderElement___init(val_t  self, val_t  param0, val_t  param1, val_t  param2, int* init_table) {
-  struct trace_t trace = {NULL, NULL, 320, LOCATE_partial_order___PartialOrderElement___init};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  val_t variable3;
-  val_t variable4;
-  val_t variable5;
-    val_t variable6;
-    val_t variable7;
-    val_t variable8;
-      val_t variable9;
-  trace.prev = tracehead; tracehead = &trace;
-  trace.file = LOCATE_partial_order;
-  variable0 =  param0;
-  variable1 =  param1;
-  variable2 =  param2;
-  if (init_table[VAL2OBJ( self)->vft[INIT_TABLE_POS_PartialOrderElement].i]) return;
-  ATTR_partial_order___PartialOrderElement____order( self) /*PartialOrderElement::_order*/ =  variable0 /*o*/;
-  ATTR_partial_order___PartialOrderElement____value( self) /*PartialOrderElement::_value*/ =  variable1 /*e*/;
-  ATTR_partial_order___PartialOrderElement____direct_greaters( self) /*PartialOrderElement::_direct_greaters*/ =  variable2 /*directs*/;
-  variable3 = NEW_array___Array___init(); /*new Array[E]*/
-  ATTR_partial_order___PartialOrderElement____direct_smallers( self) /*PartialOrderElement::_direct_smallers*/ = variable3;
-  variable3 = NEW_hash___HashSet___init(); /*new HashSet[E]*/
-  ATTR_partial_order___PartialOrderElement____greaters( self) /*PartialOrderElement::_greaters*/ = variable3;
-  variable3 = NEW_hash___HashSet___init(); /*new HashSet[E]*/
-  ATTR_partial_order___PartialOrderElement____smallers_cache( self) /*PartialOrderElement::_smallers_cache*/ = variable3;
-  variable4 = ATTR_partial_order___PartialOrderElement____greaters( self) /*PartialOrderElement::_greaters*/;
-  variable3 = variable4;
-  variable4 =  TAG_Int(0);
-  variable5 = ((array___AbstractArray___iterator_t)CALL( variable2 /*directs*/,COLOR_abstract_collection___Collection___iterator))( variable2 /*directs*/) /*AbstractArray::iterator*/;
-  while (true) { /*for*/
-    variable6 = ((array___ArrayIterator___is_ok_t)CALL(variable5,COLOR_abstract_collection___Iterator___is_ok))(variable5) /*ArrayIterator::is_ok*/;
-    if (!UNTAG_Bool(variable6)) break; /*for*/
-    variable6 = ((array___ArrayIterator___item_t)CALL(variable5,COLOR_abstract_collection___Iterator___item))(variable5) /*ArrayIterator::item*/;
-    ((abstract_collection___SimpleCollection___add_t)CALL( variable3 /*g*/,COLOR_abstract_collection___SimpleCollection___add))( variable3 /*g*/,  variable6 /*ee*/) /*SimpleCollection::add*/;
-    variable8 = ATTR_partial_order___PartialOrderElement____order( self) /*PartialOrderElement::_order*/;
-    variable8 = ((partial_order___PartialOrder_____bra_t)CALL(variable8,COLOR_partial_order___PartialOrder_____bra))(variable8,  variable6 /*ee*/) /*PartialOrder::[]*/;
-    variable7 = variable8;
-    variable8 = ((partial_order___PartialOrderElement___rank_t)CALL( variable7 /*poee*/,COLOR_partial_order___PartialOrderElement___rank))( variable7 /*poee*/) /*PartialOrderElement::rank*/;
-    variable8 = TAG_Bool(UNTAG_Int(variable8)>=UNTAG_Int( variable4 /*r*/));
-    if (UNTAG_Bool(variable8)) { /*if*/
-      variable8 = ((partial_order___PartialOrderElement___rank_t)CALL( variable7 /*poee*/,COLOR_partial_order___PartialOrderElement___rank))( variable7 /*poee*/) /*PartialOrderElement::rank*/;
-      variable8 = TAG_Int(UNTAG_Int(variable8)+UNTAG_Int( TAG_Int(1)));
-      variable4 = variable8 /*r=*/;
-    }
-    ((partial_order___PartialOrderElement___register_direct_smallers_t)CALL( variable7 /*poee*/,COLOR_partial_order___PartialOrderElement___register_direct_smallers))( variable7 /*poee*/,  variable1 /*e*/) /*PartialOrderElement::register_direct_smallers*/;
-    variable8 = ((partial_order___PartialOrderElement___greaters_t)CALL( variable7 /*poee*/,COLOR_partial_order___PartialOrderElement___greaters))( variable7 /*poee*/) /*PartialOrderElement::greaters*/;
-    variable8 = ((abstract_collection___Collection___iterator_t)CALL(variable8,COLOR_abstract_collection___Collection___iterator))(variable8) /*Collection::iterator*/;
-    while (true) { /*for*/
-      variable9 = ((abstract_collection___Iterator___is_ok_t)CALL(variable8,COLOR_abstract_collection___Iterator___is_ok))(variable8) /*Iterator::is_ok*/;
-      if (!UNTAG_Bool(variable9)) break; /*for*/
-      variable9 = ((abstract_collection___Iterator___item_t)CALL(variable8,COLOR_abstract_collection___Iterator___item))(variable8) /*Iterator::item*/;
-      ((abstract_collection___SimpleCollection___add_t)CALL( variable3 /*g*/,COLOR_abstract_collection___SimpleCollection___add))( variable3 /*g*/,  variable9 /*eee*/) /*SimpleCollection::add*/;
-      continue_39: while(0);
-      ((abstract_collection___Iterator___next_t)CALL(variable8,COLOR_abstract_collection___Iterator___next))(variable8) /*Iterator::next*/;
-    }
-    break_39: while(0);
-    continue_38: while(0);
-    ((array___ArrayIterator___next_t)CALL(variable5,COLOR_abstract_collection___Iterator___next))(variable5) /*ArrayIterator::next*/;
-  }
-  break_38: while(0);
-  ATTR_partial_order___PartialOrderElement____rank( self) /*PartialOrderElement::_rank*/ =  variable4 /*r*/;
-  init_table[VAL2OBJ( self)->vft[INIT_TABLE_POS_PartialOrderElement].i] = 1;
-  tracehead = trace.prev;
+void partial_order___PartialOrderElement___init(val_t p0, val_t p1, val_t p2, val_t p3, int* init_table){
+  int itpos1 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_PartialOrderElement].i;
+  struct {struct stack_frame_t me; val_t MORE_REG[6];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t REGB2;
+  val_t REGB3;
+  val_t tmp;
+  if (init_table[itpos1]) return;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_partial_order;
+  fra.me.line = 316;
+  fra.me.meth = LOCATE_partial_order___PartialOrderElement___init;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 7;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[3] = NIT_NULL;
+  fra.me.REG[4] = NIT_NULL;
+  fra.me.REG[5] = NIT_NULL;
+  fra.me.REG[6] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[2] = p2;
+  fra.me.REG[3] = p3;
+  /* ./metamodel//partial_order.nit:318 */
+  ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0]) = fra.me.REG[1];
+  /* ./metamodel//partial_order.nit:319 */
+  ATTR_partial_order___PartialOrderElement____value(fra.me.REG[0]) = fra.me.REG[2];
+  /* ./metamodel//partial_order.nit:320 */
+  ATTR_partial_order___PartialOrderElement____direct_greaters(fra.me.REG[0]) = fra.me.REG[3];
+  /* ./metamodel//partial_order.nit:321 */
+  fra.me.REG[1] = NEW_Array_array___Array___init();
+  ATTR_partial_order___PartialOrderElement____direct_smallers(fra.me.REG[0]) = fra.me.REG[1];
+  /* ./metamodel//partial_order.nit:323 */
+  fra.me.REG[1] = NEW_HashSet_hash_collection___HashSet___init();
+  ATTR_partial_order___PartialOrderElement____greaters(fra.me.REG[0]) = fra.me.REG[1];
+  /* ./metamodel//partial_order.nit:324 */
+  fra.me.REG[1] = NEW_HashSet_hash_collection___HashSet___init();
+  ATTR_partial_order___PartialOrderElement____smallers_cache(fra.me.REG[0]) = fra.me.REG[1];
+  /* ./metamodel//partial_order.nit:326 */
+  REGB0 = TAG_Bool(ATTR_partial_order___PartialOrderElement____greaters(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_greaters", LOCATE_partial_order, 326);
+  }
+  fra.me.REG[1] = ATTR_partial_order___PartialOrderElement____greaters(fra.me.REG[0]);
+  /* ./metamodel//partial_order.nit:327 */
+  REGB0 = TAG_Int(0);
+  /* ./../lib/standard//collection//array.nit:234 */
+  REGB1 = TAG_Int(0);
+  /* ./../lib/standard//collection//array.nit:235 */
+  REGB2 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 235);
+  }
+  REGB2 = ATTR_array___AbstractArrayRead____length(fra.me.REG[3]);
+  /* ./../lib/standard//collection//array.nit:236 */
+  fra.me.REG[4] = ATTR_array___Array____items(fra.me.REG[3]);
+  /* ./../lib/standard//collection//array.nit:237 */
+  while(1) {
+    /* ./../lib/standard//collection//array.nit:23 */
+    REGB2 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
+    }
+    REGB2 = ATTR_array___AbstractArrayRead____length(fra.me.REG[3]);
+    /* ./../lib/standard//kernel.nit:212 */
+    REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
+    /* ./../lib/standard//collection//array.nit:237 */
+    if (UNTAG_Bool(REGB2)) {
+      /* ./../lib/standard//collection//array.nit:238 */
+      REGB2 = TAG_Bool(fra.me.REG[4]==NIT_NULL);
+      if (UNTAG_Bool(REGB2)) {
+        nit_abort("Reciever is null", NULL, LOCATE_array, 238);
+      }
+      /* ./../lib/standard//collection//array.nit:654 */
+      fra.me.REG[5] = ((Nit_NativeArray)fra.me.REG[4])->val[UNTAG_Int(REGB1)];
+      /* ./metamodel//partial_order.nit:329 */
+      CALL_abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[5]);
+      /* ./metamodel//partial_order.nit:330 */
+      REGB2 = TAG_Bool(ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0])!=NIT_NULL);
+      if (UNTAG_Bool(REGB2)) {
+      } else {
+        nit_abort("Uninitialized attribute %s", "_order", LOCATE_partial_order, 330);
+      }
+      fra.me.REG[6] = ATTR_partial_order___PartialOrderElement____order(fra.me.REG[0]);
+      fra.me.REG[5] = CALL_partial_order___PartialOrder_____bra(fra.me.REG[6])(fra.me.REG[6], fra.me.REG[5]);
+      /* ./metamodel//partial_order.nit:331 */
+      REGB2 = CALL_partial_order___PartialOrderElement___rank(fra.me.REG[5])(fra.me.REG[5]);
+      /* ./../lib/standard//kernel.nit:213 */
+      REGB2 = TAG_Bool(UNTAG_Int(REGB2)>=UNTAG_Int(REGB0));
+      /* ./metamodel//partial_order.nit:331 */
+      if (UNTAG_Bool(REGB2)) {
+        /* ./metamodel//partial_order.nit:332 */
+        REGB2 = CALL_partial_order___PartialOrderElement___rank(fra.me.REG[5])(fra.me.REG[5]);
+        REGB3 = TAG_Int(1);
+        /* ./../lib/standard//kernel.nit:215 */
+        REGB3 = TAG_Int(UNTAG_Int(REGB2)+UNTAG_Int(REGB3));
+        /* ./metamodel//partial_order.nit:332 */
+        REGB0 = REGB3;
+      }
+      /* ./metamodel//partial_order.nit:334 */
+      CALL_partial_order___PartialOrderElement___register_direct_smallers(fra.me.REG[5])(fra.me.REG[5], fra.me.REG[2]);
+      /* ./metamodel//partial_order.nit:335 */
+      fra.me.REG[5] = CALL_partial_order___PartialOrderElement___greaters(fra.me.REG[5])(fra.me.REG[5]);
+      CALL_abstract_collection___Collection___iterate(fra.me.REG[5])(fra.me.REG[5], (&(fra.me)), ((fun_t)OC_partial_order___PartialOrderElement___init_1));
+      /* ./../lib/standard//collection//array.nit:239 */
+      REGB3 = TAG_Int(1);
+      /* ./../lib/standard//kernel.nit:215 */
+      REGB3 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB3));
+      /* ./../lib/standard//collection//array.nit:239 */
+      REGB1 = REGB3;
+    } else {
+      /* ./../lib/standard//collection//array.nit:237 */
+      goto label2;
+    }
+  }
+  label2: while(0);
+  /* ./metamodel//partial_order.nit:339 */
+  ATTR_partial_order___PartialOrderElement____rank(fra.me.REG[0]) = REGB0;
+  stack_frame_head = fra.me.prev;
+  init_table[itpos1] = 1;
   return;
 }
+      void OC_partial_order___PartialOrderElement___init_1(struct stack_frame_t *closctx, val_t p0){
+        struct {struct stack_frame_t me;} fra;
+        val_t tmp;
+        fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+        fra.me.file = LOCATE_partial_order;
+        fra.me.line = 0;
+        fra.me.meth = LOCATE_partial_order___PartialOrderElement___init;
+        fra.me.has_broke = 0;
+        fra.me.REG_size = 1;
+        fra.me.REG[0] = NIT_NULL;
+        fra.me.REG[0] = p0;
+        /* ./metamodel//partial_order.nit:336 */
+        CALL_abstract_collection___SimpleCollection___add(closctx->REG[1])(closctx->REG[1], fra.me.REG[0]);
+        stack_frame_head = fra.me.prev;
+        return;
+      }