Support break and labeled statements.

frog/leg/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 153 matching lines @@
       environment.addAll(phisInput);
     }
   }
 
   void visitGoto(HGoto goto) {
     HBasicBlock block = goto.block;
     if (block.successors[0].dominator != block) return;
     visitBasicBlock(block.successors[0]);
   }
 
+  void visitBreak(HBreak breakInstruction) {
+    unimplemented();
+  }
+
   void visitLoopBranch(HLoopBranch branch) {
     HBasicBlock block = branch.block;
 
     // Visit the code after the loop.
     visitBasicBlock(block.successors[1]);
     // TODO(ngeoffray): Remove the instructions of the loop-exit from
     // the environment.
 
     HBasicBlock header = block.isLoopHeader() ? block : block.parentLoopHeader;
     // Put the loop phis in the environment.
@@ skipping 152 matching lines @@
     compiler.internalError('Control flow instructions already dealt with.',
                            instruction: instruction);
   }
 
   visitBailoutTarget(HBailoutTarget target) {
     blocks.forEach((HBasicBlock block) {
       block.bailouts.add(target);
     });
   }
 }