Desugar bitwise negation into XOR and kill all UnaryOp stuff.

src/code-stubs-hydrogen.cc

Index: src/code-stubs-hydrogen.cc
diff --git a/src/code-stubs-hydrogen.cc b/src/code-stubs-hydrogen.cc
index 33681ed0999db60e764645b4a5fb03703e062e0e..852f7b569727b08939d1c952146699d6ff4999f7 100644
--- a/src/code-stubs-hydrogen.cc
+++ b/src/code-stubs-hydrogen.cc
@@ -802,45 +802,6 @@ Handle<Code> CompareNilICStub::GenerateCode() {
 
 
 template <>
-HValue* CodeStubGraphBuilder<UnaryOpStub>::BuildCodeInitializedStub() {
-  UnaryOpStub* stub = casted_stub();
-  ASSERT_EQ(Token::BIT_NOT, stub->operation());
-  Handle<Type> type = stub->GetType(graph()->isolate());
-  HValue* input = GetParameter(0);
-
-  // Prevent unwanted HChange being inserted to ensure that the stub
-  // deopts on newly encountered types.
-  if (!type->Maybe(Type::Double())) {
-    input = Add<HForceRepresentation>(input, Representation::Smi());
-  }
-
-  if (!type->Is(Type::Number())) {
-    // If we expect to see other things than Numbers, we will create a generic
-    // stub, which handles all numbers and calls into the runtime for the rest.
-    IfBuilder if_number(this);
-    if_number.If<HIsNumberAndBranch>(input);
-    if_number.Then();
-    HInstruction* res = BuildUnaryMathOp(input, type, stub->operation());
-    if_number.Return(AddInstruction(res));
-    if_number.Else();
-    HValue* function = AddLoadJSBuiltin(stub->ToJSBuiltin());
-    Add<HPushArgument>(GetParameter(0));
-    HValue* result = Add<HInvokeFunction>(function, 1);
-    if_number.Return(result);
-    if_number.End();
-    return graph()->GetConstantUndefined();
-  }
-
-  return AddInstruction(BuildUnaryMathOp(input, type, stub->operation()));
-}
-
-
-Handle<Code> UnaryOpStub::GenerateCode() {
-  return DoGenerateCode(this);
-}
-
-
-template <>
 HValue* CodeStubGraphBuilder<ToBooleanStub>::BuildCodeInitializedStub() {
   ToBooleanStub* stub = casted_stub();