[kernel] Add support for cloning Vector nodes and ClosureCreation

pkg/kernel/lib/clone.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 library kernel.clone;
 
 import 'ast.dart';
 import 'type_algebra.dart';
 
 /// Visitor that return a clone of a tree, maintaining references to cloned
 /// objects.
@@ skipping 209 matching lines @@
 
   visitNullLiteral(NullLiteral node) {
     return new NullLiteral();
   }
 
   visitLet(Let node) {
     var newVariable = clone(node.variable);
     return new Let(newVariable, clone(node.body));
   }
 
+  visitVectorCreation(VectorCreation node) {
+    return new VectorCreation(node.length);
+  }
+
+  visitClosureCreation(ClosureCreation node) {
+    return new ClosureCreation.byReference(
+        node.topLevelFunctionReference,
+        cloneOptional(node.contextVector),
+        visitOptionalType(node.functionType));
+  }
+
+  visitVectorSet(VectorSet node) {
+    return new VectorSet(
+        clone(node.vectorExpression), node.index, clone(node.value));
+  }
+
+  visitVectorGet(VectorGet node) {
+    return new VectorGet(clone(node.vectorExpression), node.index);
+  }
+
+  visitVectorCopy(VectorCopy node) {
+    return new VectorCopy(clone(node.vectorExpression));
+  }
+
   // Statements
   visitInvalidStatement(InvalidStatement node) {
     return new InvalidStatement();
   }
 
   visitExpressionStatement(ExpressionStatement node) {
     return new ExpressionStatement(clone(node.expression));
   }
 
   visitBlock(Block node) {
@@ skipping 165 matching lines @@
   visitArguments(Arguments node) {
     return new Arguments(node.positional.map(clone).toList(),
         types: node.types.map(visitType).toList(),
         named: node.named.map(clone).toList());
   }
 
   visitNamedExpression(NamedExpression node) {
     return new NamedExpression(node.name, clone(node.value));
   }
 }