dart2js cps: Fix traversal order in statement rewriter.

pkg/compiler/lib/src/tree_ir/optimization/statement_rewriter.dart

 // Copyright (c) 2014, 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 tree_ir.optimization.statement_rewriter;
 
 import 'optimization.dart' show Pass;
 import '../tree_ir_nodes.dart';
 import '../../io/source_information.dart';
 import '../../elements/elements.dart';
@@ skipping 561 matching lines @@
     //
     // - Other visit methods assume that all subexpressions are variable uses
     //   because they come fresh out of the tree IR builder.
     //
     // - Reprocessing can be expensive.
     //
     return node;
   }
 
   Expression visitLogicalOperator(LogicalOperator node) {
-    node.left = visitExpression(node.left);
-
     // Impure expressions may not propagate across the branch.
     inEmptyEnvironment(() {
       node.right = visitExpression(node.right);
     });
-
+    node.left = visitExpression(node.left);
     return node;
   }
 
   Expression visitNot(Not node) {
     node.operand = visitExpression(node.operand);
     return node;
   }
 
   bool isNullConstant(Expression node) {
     return node is Constant && node.value.isNull;
@@ skipping 638 matching lines @@
   }
 
   @override
   Expression visitAwait(Await node) {
     node.input = visitExpression(node.input);
     return node;
   }
 
   @override
   Statement visitYield(Yield node) {
+    node.next = visitStatement(node.next);
     node.input = visitExpression(node.input);
-    node.next = visitStatement(node.next);
     return node;
   }
 
   @override
   Statement visitNullCheck(NullCheck node) {
     inEmptyEnvironment(() {
       node.next = visitStatement(node.next);
     });
     if (node.condition != null) {
       inEmptyEnvironment(() {
@@ skipping 92 matching lines @@
   VariableUseCallback callback;
 
   VariableUseVisitor(this.callback);
 
   visitVariableUse(VariableUse use) => callback(use);
 
   static void visit(Expression node, VariableUseCallback callback) {
     new VariableUseVisitor(callback).visitExpression(node);
   }
 }