Improve canonicalization of strict comparisons and bool negation.

runtime/vm/intermediate_language.h

 // Copyright (c) 2013, 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 3739 matching lines @@
   virtual CompileType ComputeType() const;
 
   Value* value() const { return inputs_[0]; }
 
   virtual bool CanDeoptimize() const { return false; }
 
   virtual EffectSet Effects() const { return EffectSet::None(); }
 
   virtual bool MayThrow() const { return false; }
 
+  virtual Definition* Canonicalize(FlowGraph* flow_graph);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(BooleanNegateInstr);
 };
 
 
 class InstanceOfInstr : public TemplateDefinition<3> {
  public:
   InstanceOfInstr(intptr_t token_pos,
                   Value* value,
                   Value* instantiator,
@@ skipping 3084 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_