Revert r6748....

src/hydrogen-instructions.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 115 matching lines @@
   V(LoadFunctionPrototype)                     \
   V(LoadGlobal)                                \
   V(LoadKeyedFastElement)                      \
   V(LoadKeyedGeneric)                          \
   V(LoadNamedField)                            \
   V(LoadNamedGeneric)                          \
   V(LoadPixelArrayElement)                     \
   V(LoadPixelArrayExternalPointer)             \
   V(Mod)                                       \
   V(Mul)                                       \
-  V(Neg)                                       \
   V(ObjectLiteral)                             \
   V(OsrEntry)                                  \
   V(OuterContext)                              \
   V(Parameter)                                 \
   V(PixelArrayLength)                          \
   V(Power)                                     \
   V(PushArgument)                              \
   V(RegExpLiteral)                             \
   V(Return)                                    \
   V(Sar)                                       \
@@ skipping 1264 matching lines @@
   }
   virtual HType CalculateInferredType() const;
 
   DECLARE_CONCRETE_INSTRUCTION(BitNot, "bit_not")
 
  protected:
   virtual bool DataEquals(HValue* other) const { return true; }
 };
 
 
-class HNeg: public HUnaryOperation {
- public:
-  explicit HNeg(HValue* value) : HUnaryOperation(value) {
-    set_representation(Representation::Tagged());
-    SetFlag(kFlexibleRepresentation);
-    SetFlag(kCanOverflow);
-    SetAllSideEffects();
-  }
-
-  virtual void RepresentationChanged(Representation to) {
-    // May change from tagged to untagged, not vice versa.
-    ASSERT(representation().IsTagged() || representation().Equals(to));
-    if (!to.IsTagged()) {
-      ClearAllSideEffects();
-      SetFlag(kUseGVN);
-    }
-  }
-
-  virtual Representation RequiredInputRepresentation(int index) const {
-    return representation();
-  }
-
-  virtual HType CalculateInferredType() const;
-  virtual HValue* EnsureAndPropagateNotMinusZero(BitVector* visited);
-  virtual void PrintDataTo(StringStream* stream) const;
-  DECLARE_CONCRETE_INSTRUCTION(Neg, "neg")
-
- protected:
-  virtual bool DataEquals(HValue* other) const { return true; }
-  virtual Range* InferRange();
-};
-
-
 class HUnaryMathOperation: public HUnaryOperation {
  public:
   HUnaryMathOperation(HValue* value, BuiltinFunctionId op)
       : HUnaryOperation(value), op_(op) {
     switch (op) {
       case kMathFloor:
       case kMathRound:
       case kMathCeil:
         set_representation(Representation::Integer32());
         break;
@@ skipping 1987 matching lines @@
   HValue* object() const { return left(); }
   HValue* key() const { return right(); }
 };
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_