Allow use of phase-local zone in GenericGraphVisit.

src/compiler/generic-algorithm.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_GENERIC_ALGORITHM_H_
 #define V8_COMPILER_GENERIC_ALGORITHM_H_
 
 #include <deque>
 #include <stack>
 
@@ skipping 20 matching lines @@
     DEFER = SKIP | REENTER
   };
 
   // struct Visitor {
   //   Control Pre(Traits::Node* current);
   //   Control Post(Traits::Node* current);
   //   void PreEdge(Traits::Node* from, int index, Traits::Node* to);
   //   void PostEdge(Traits::Node* from, int index, Traits::Node* to);
   // }
   template <class Visitor, class Traits, class RootIterator>
-  static void Visit(GenericGraphBase* graph, RootIterator root_begin,
-                    RootIterator root_end, Visitor* visitor) {
-    // TODO(bmeurer): Pass "local" zone as parameter.
-    Zone* zone = graph->zone();
+  static void Visit(GenericGraphBase* graph, Zone* zone,
+                    RootIterator root_begin, RootIterator root_end,
+                    Visitor* visitor) {
     typedef typename Traits::Node Node;
     typedef typename Traits::Iterator Iterator;
     typedef std::pair<Iterator, Iterator> NodeState;
     typedef zone_allocator<NodeState> ZoneNodeStateAllocator;
     typedef std::deque<NodeState, ZoneNodeStateAllocator> NodeStateDeque;
     typedef std::stack<NodeState, NodeStateDeque> NodeStateStack;
     NodeStateStack stack((NodeStateDeque(ZoneNodeStateAllocator(zone))));
     BoolVector visited(Traits::max_id(graph), false, ZoneBoolAllocator(zone));
     Node* current = *root_begin;
     while (true) {
@@ skipping 35 matching lines @@
         }
         top = stack.top();
         visitor->PostEdge(Traits::from(top.first), top.first.edge().index(),
                           Traits::to(top.first));
         ++stack.top().first;
       }
     }
   }
 
   template <class Visitor, class Traits>
-  static void Visit(GenericGraphBase* graph, typename Traits::Node* current,
-                    Visitor* visitor) {
+  static void Visit(GenericGraphBase* graph, Zone* zone,
+                    typename Traits::Node* current, Visitor* visitor) {
     typename Traits::Node* array[] = {current};
-    Visit<Visitor, Traits>(graph, &array[0], &array[1], visitor);
+    Visit<Visitor, Traits>(graph, zone, &array[0], &array[1], visitor);
   }
 
   template <class B, class S>
   struct NullNodeVisitor {
     Control Pre(GenericNode<B, S>* node) { return CONTINUE; }
     Control Post(GenericNode<B, S>* node) { return CONTINUE; }
     void PreEdge(GenericNode<B, S>* from, int index, GenericNode<B, S>* to) {}
     void PostEdge(GenericNode<B, S>* from, int index, GenericNode<B, S>* to) {}
   };
 
@@ skipping 13 matching lines @@
   static bool GetVisited(BoolVector* visited, int id) {
     if (id >= static_cast<int>(visited->size())) return false;
     return visited->at(id);
   }
 };
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_GENERIC_ALGORITHM_H_