Make first and last getters.

lib/compiler/implementation/ssa/bailout.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 BailoutInfo {
   int instructionId;
   int bailoutId;
   BailoutInfo(this.instructionId, this.bailoutId);
 }
 
@@ skipping 412 matching lines @@
     }
   }
 
   void visitBasicBlock(HBasicBlock block) {
     // Abort traversal if we are leaving the currently active sub-graph.
     if (!subGraph.contains(block)) return;
 
     if (block.isLoopHeader()) {
       blocks.addLast(block);
     } else if (block.isLabeledBlock()
-               && (blocks.isEmpty || !identical(blocks.last(), block))) {
+               && (blocks.isEmpty || !identical(blocks.last, block))) {
       HLabeledBlockInformation info = block.blockFlow.body;
       visitStatements(info.body);
       return;
     }
 
     HInstruction instruction = block.first;
     while (instruction != null) {
       instruction.accept(this);
       instruction = instruction.next;
     }
@@ skipping 93 matching lines @@
         hasComplexBailoutTargets = true;
       }
     } else {
       hasComplexBailoutTargets = true;
       blocks.forEach((HBasicBlock block) {
         block.bailoutTargets.add(target);
       });
     }
   }
 }