Clean up warnings.

sdk/lib/_internal/compiler/implementation/ssa/builder.dart

 // Copyright (c) 2012, 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.
 
 part of ssa;
 
 /**
  * A special element for the extra parameter taken by intercepted
  * methods. We need to override [Element.computeType] because our
  * optimizers may look at its declared type.
@@ skipping 1978 matching lines @@
       conditionExitBlock.addAtExit(new HIf(condition));
       conditionExitBlock.addSuccessor(elseBlock);
       conditionExitBlock.remove(conditionExitBlock.last);
       HIfBlockInformation info =
           new HIfBlockInformation(
             wrapExpressionGraph(conditionExpression),
             wrapStatementGraph(bodyGraph),
             wrapStatementGraph(elseGraph));
 
       conditionBlock.setBlockFlow(info, current);
-      conditionBlock.last.blockInformation = conditionBlock.blockFlow;
+      HIf ifBlock = conditionBlock.last;
+      ifBlock.blockInformation = conditionBlock.blockFlow;
 
       // If the body has any break, attach a synthesized label to the
       // if block.
       if (jumpHandler.hasAnyBreak()) {
         TargetElement target = elements[loop];
         LabelElement label = target.addLabel(null, 'loop');
         label.isBreakTarget = true;
         SubGraph labelGraph = new SubGraph(conditionBlock, current);
         HLabeledBlockInformation labelInfo = new HLabeledBlockInformation(
                 new HSubGraphBlockInformation(labelGraph),
@@ skipping 1475 matching lines @@
     });
     generateThrowNoSuchMethod(diagnosticNode,
                               function.name.slowToString(),
                               argumentNodes: argumentNodes,
                               existingArguments: existingArguments);
   }
 
   visitNewExpression(NewExpression node) {
     Element element = elements[node.send];
     if (!Elements.isErroneousElement(element)) {
-      element = element.redirectionTarget;
+      FunctionElement function = element;
+      element = function.redirectionTarget;
     }
     if (Elements.isErroneousElement(element)) {
       ErroneousElement error = element;
       if (error.messageKind == MessageKind.CANNOT_FIND_CONSTRUCTOR) {
         generateThrowNoSuchMethod(node.send,
                                   getTargetName(error, 'constructor'),
                                   argumentNodes: node.send.arguments);
       } else if (error.messageKind == MessageKind.CANNOT_RESOLVE) {
         Message message = error.messageKind.message(error.messageArguments);
         generateRuntimeError(node.send, message.toString());
@@ skipping 1450 matching lines @@
           new HSubGraphBlockInformation(elseBranch.graph));
 
     HBasicBlock conditionStartBlock = conditionBranch.block;
     conditionStartBlock.setBlockFlow(info, joinBlock);
     SubGraph conditionGraph = conditionBranch.graph;
     HIf branch = conditionGraph.end.last;
     assert(branch is HIf);
     branch.blockInformation = conditionStartBlock.blockFlow;
   }
 }