Support IfThenElse instruction pattern for arbitrary smi constants.

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 2756 matching lines @@
   virtual void PrintOperandsTo(BufferFormatter* f) const;
 
   virtual CompileType ComputeType() const;
 
   virtual void InferRange();
 
   virtual bool CanDeoptimize() const { return false; }
   virtual bool HasSideEffect() const { return false; }
 
   virtual bool AttributesEqual(Instruction* other) const {
-    return kind_ == other->AsIfThenElse()->kind_;
+    IfThenElseInstr* other_if_then_else = other->AsIfThenElse();
+    return (kind_ == other_if_then_else->kind_) &&
+           (if_true_ == other_if_then_else->if_true_) &&
+           (if_false_ == other_if_then_else->if_false_);
   }
 
   virtual bool AffectedBySideEffect() const {
     return false;
   }
 
   Value* left() const { return inputs_[0]; }
   Value* right() const { return inputs_[1]; }
   intptr_t if_true() const { return if_true_; }
   intptr_t if_false() const { return if_false_; }
@@ skipping 2091 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_