Remove possibility of critical edges.

runtime/vm/intermediate_language.h

 // 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.
 
 #ifndef VM_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 1091 matching lines @@
  public:
   explicit BranchInstr(Value* value)
       : Instruction(),
         value_(value),
         true_successor_(NULL),
         false_successor_(NULL) { }
 
   DECLARE_INSTRUCTION(Branch)
 
   Value* value() const { return value_; }
-  BlockEntryInstr* true_successor() const { return true_successor_; }
-  BlockEntryInstr* false_successor() const { return false_successor_; }
+  TargetEntryInstr* true_successor() const { return true_successor_; }
+  TargetEntryInstr* false_successor() const { return false_successor_; }
 
-  BlockEntryInstr** true_successor_address() { return &true_successor_; }
-  BlockEntryInstr** false_successor_address() { return &false_successor_; }
+  TargetEntryInstr** true_successor_address() { return &true_successor_; }
+  TargetEntryInstr** false_successor_address() { return &false_successor_; }
 
   virtual void SetSuccessor(Instruction* instr) { UNREACHABLE(); }
 
   virtual void Postorder(GrowableArray<BlockEntryInstr*>* block_entries);
 
  private:
   Value* value_;
-  BlockEntryInstr* true_successor_;
-  BlockEntryInstr* false_successor_;
+  TargetEntryInstr* true_successor_;
+  TargetEntryInstr* false_successor_;
 
   DISALLOW_COPY_AND_ASSIGN(BranchInstr);
 };
 
 #undef DECLARE_INSTRUCTION
 
 
 // Visitor base class to visit each instruction and computation in a flow
 // graph as defined by a reversed list of basic blocks.
 class FlowGraphVisitor : public ValueObject {
@@ skipping 20 matching lines @@
 #undef DECLARE_VISIT_INSTRUCTION
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_