[turbofan] Fix life time and use of the Typer.

src/compiler/typer.cc

 // Copyright 2014 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.
 
 #include "src/base/flags.h"
 #include "src/bootstrapper.h"
 #include "src/compiler/graph-reducer.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/node.h"
 #include "src/compiler/node-properties.h"
@@ skipping 411 matching lines @@
       return NoChange();
     } else {
       // No previous type, simply update the bounds.
       NodeProperties::SetBounds(node, current);
       return Changed(node);
     }
   }
 };
 
 
-void Typer::Run() {
-  {
-    // TODO(titzer): this is a hack. Reset types for interior nodes first.
-    NodeDeque deque(zone());
-    NodeMarker<bool> marked(graph(), 2);
-    deque.push_front(graph()->end());
-    marked.Set(graph()->end(), true);
-    while (!deque.empty()) {
-      Node* node = deque.front();
-      deque.pop_front();
-      // TODO(titzer): there shouldn't be a need to retype constants.
-      if (node->op()->ValueOutputCount() > 0)
-        NodeProperties::RemoveBounds(node);
-      for (Node* input : node->inputs()) {
-        if (!marked.Get(input)) {
-          marked.Set(input, true);
-          deque.push_back(input);
-        }
-      }
-    }
-  }
+void Typer::Run() { Run(NodeVector(zone())); }
 
+
+void Typer::Run(const NodeVector& roots) {
   Visitor visitor(this);
   GraphReducer graph_reducer(zone(), graph());
   graph_reducer.AddReducer(&visitor);
+  for (Node* const root : roots) graph_reducer.ReduceNode(root);
   graph_reducer.ReduceGraph();
 }
 
 
 void Typer::Decorator::Decorate(Node* node, bool incomplete) {
   if (incomplete) return;
   if (node->op()->ValueOutputCount() > 0) {
     // Only eagerly type-decorate nodes with known input types.
     // Other cases will generally require a proper fixpoint iteration with Run.
     bool is_typed = NodeProperties::IsTyped(node);
@@ skipping 1969 matching lines @@
       TYPED_ARRAYS(TYPED_ARRAY_CASE)
 #undef TYPED_ARRAY_CASE
     }
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8