Enable more redundancy elimination for checked mode asserts.

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 1892 matching lines @@
     ASSERT(!is_eliminated_);
     is_eliminated_ = true;
   }
 
   virtual void PrintOperandsTo(BufferFormatter* f) const;
 
   virtual bool CanDeoptimize() const { return false; }
 
   virtual bool HasSideEffect() const { return false; }
 
+  virtual bool AffectedBySideEffect() const { return false; }
+  virtual bool AttributesEqual(Instruction* other) const;
+
   virtual intptr_t ResultCid() const { return kDynamicCid; }
 
+  virtual Definition* Canonicalize();
+
  private:
   const intptr_t token_pos_;
   const AbstractType& dst_type_;
   const String& dst_name_;
   bool is_eliminated_;
 
   DISALLOW_COPY_AND_ASSIGN(AssertAssignableInstr);
 };
 
 
@@ skipping 19 matching lines @@
     ASSERT(!is_eliminated_);
     is_eliminated_ = true;
   }
 
   virtual void PrintOperandsTo(BufferFormatter* f) const;
 
   virtual bool CanDeoptimize() const { return false; }
 
   virtual bool HasSideEffect() const { return false; }
 
+  virtual bool AffectedBySideEffect() const { return false; }
+  virtual bool AttributesEqual(Instruction* other) const { return true; }
+
   virtual intptr_t ResultCid() const { return kBoolCid; }
 
   virtual Definition* Canonicalize();
 
  private:
   const intptr_t token_pos_;
   bool is_eliminated_;
 
   DISALLOW_COPY_AND_ASSIGN(AssertBooleanInstr);
 };
@@ skipping 2265 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_