Replaced unary negation by multiplication with -1.

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 786 matching lines @@
 
 
 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())) {
@@ skipping 118 matching lines @@
   return value;
 }
 
 
 Handle<Code> ElementsTransitionAndStoreStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 
 } }  // namespace v8::internal