Fix a bug related to bailout where an instruction would be generate at use site for a HBailoutTarge…

frog/leg/ssa/nodes.dart

 // Copyright (c) 2011, 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.
 
 interface HVisitor<R> {
   R visitAdd(HAdd node);
   R visitBailoutTarget(HBailoutTarget node);
   R visitBitAnd(HBitAnd node);
   R visitBitNot(HBitNot node);
   R visitBitOr(HBitOr node);
@@ skipping 2038 matching lines @@
     return value.type;
   }
 
   HType computeDesiredInputType(HInstruction input) {
     // TODO(floitsch): we want the target to be a function.
     if (input == target) return HType.UNKNOWN;
     if (input == receiver) return HType.ARRAY;
     return HType.UNKNOWN;
   }
 
-  bool hasExpectedType() => value.hasExpectedType();
+  // This instruction does not yield a new value, so it always
+  // has the expected type (void).
+  bool hasExpectedType() => true;
 }
 
 class HNonSsaInstruction extends HInstruction {
   HNonSsaInstruction(inputs) : super(inputs);
   // Non-SSA instructions cannot take part in GVN.
   void prepareGvn() { unreachable(); }
   bool useGvn() { unreachable(); }
   void setUseGvn() { unreachable(); }
 
   // TODO(floitsch): make class abstract instead of adding an abstract method.
@@ skipping 61 matching lines @@
 class HIfBlockInformation {
   final HIf branch;
   final SubGraph thenGraph;
   final SubGraph elseGraph;
   final HBasicBlock joinBlock;
   HIfBlockInformation(this.branch,
                       this.thenGraph,
                       this.elseGraph,
                       this.joinBlock);
 }