Desugar bitwise negation into XOR and kill all UnaryOp stuff.

src/code-stubs-hydrogen.cc

 // Copyright 2012 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 784 matching lines @@
       : graph()->GetConstantUndefined();
 }
 
 
 Handle<Code> CompareNilICStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 
 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();
 
   IfBuilder if_true(this);
   if_true.If<HBranch>(GetParameter(0), stub->GetTypes());
   if_true.Then();
   if_true.Return(graph()->GetConstant1());
   if_true.Else();
   if_true.End();
   return graph()->GetConstant0();
@@ skipping 82 matching lines @@
   return value;
 }
 
 
 Handle<Code> ElementsTransitionAndStoreStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 
 } }  // namespace v8::internal