Make first and last getters.

lib/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.
 
 class Interceptors {
   Compiler compiler;
   Interceptors(Compiler this.compiler);
 
   SourceString mapOperatorToMethodName(Operator op) {
     String name = op.source.stringValue;
@@ skipping 1527 matching lines @@
 
   void pushWithPosition(HInstruction instruction, Node node) {
     push(attachPosition(instruction, node));
   }
 
   HInstruction pop() {
     return stack.removeLast();
   }
 
   void dup() {
-    stack.add(stack.last());
+    stack.add(stack.last);
   }
 
   HInstruction popBoolified() {
     HInstruction value = pop();
     if (compiler.enableTypeAssertions) {
       return potentiallyCheckType(
           value,
           compiler.boolClass,
           kind: HTypeConversion.BOOLEAN_CONVERSION_CHECK);
     }
     HInstruction result = new HBoolify(value);
     add(result);
     return result;
   }
 
   HInstruction attachPosition(HInstruction target, Node node) {
     target.sourcePosition = sourceFileLocationForBeginToken(node);
     return target;
   }
 
   SourceFileLocation sourceFileLocationForBeginToken(Node node) =>
       sourceFileLocationForToken(node, node.getBeginToken());
 
   SourceFileLocation sourceFileLocationForEndToken(Node node) =>
       sourceFileLocationForToken(node, node.getEndToken());
 
   SourceFileLocation sourceFileLocationForToken(Node node, Token token) {
-    Element element = sourceElementStack.last();
+    Element element = sourceElementStack.last;
     // TODO(johnniwinther): remove the 'element.patch' hack.
     if (element is FunctionElement) {
       FunctionElement functionElement = element;
       if (functionElement.patch != null) element = functionElement.patch;
     }
     Script script = element.getCompilationUnit().script;
     SourceFile sourceFile = script.file;
     SourceFileLocation location = new SourceFileLocation(sourceFile, token);
     if (!location.isValid()) {
       throw MessageKind.INVALID_SOURCE_FILE_LOCATION.message(
@@ skipping 2918 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;
   }
 }