Add initial hydrogenized NewStringAddStub.

src/code-stubs.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 664 matching lines @@
                               handle(Type::String(), isolate)), isolate);
   }
   ASSERT(result_state_ != GENERIC);
   if (result_state_ == NUMBER && op_ == Token::SHR) {
     return handle(Type::Unsigned32(), isolate);
   }
   return StateToType(result_state_, isolate);
 }
 
 
+void NewStringAddStub::PrintBaseName(StringStream* stream) {
+  stream->Add("NewStringAddStub");
+  if ((flags() & STRING_ADD_CHECK_BOTH) == STRING_ADD_CHECK_BOTH) {
+    stream->Add("_CheckBoth");
+  } else if ((flags() & STRING_ADD_CHECK_LEFT) == STRING_ADD_CHECK_LEFT) {
+    stream->Add("_CheckLeft");
+  } else if ((flags() & STRING_ADD_CHECK_RIGHT) == STRING_ADD_CHECK_RIGHT) {
+    stream->Add("_CheckRight");
+  }
+  if (pretenure_flag() == TENURED) {
+    stream->Add("_Tenured");
+  }
+}
+
+
 InlineCacheState ICCompareStub::GetICState() {
   CompareIC::State state = Max(left_, right_);
   switch (state) {
     case CompareIC::UNINITIALIZED:
       return ::v8::internal::UNINITIALIZED;
     case CompareIC::SMI:
     case CompareIC::NUMBER:
     case CompareIC::INTERNALIZED_STRING:
     case CompareIC::STRING:
     case CompareIC::UNIQUE_NAME:
@@ skipping 432 matching lines @@
   InstallDescriptor(isolate, &stub);
 }
 
 
 void FastNewClosureStub::InstallDescriptors(Isolate* isolate) {
   FastNewClosureStub stub(STRICT_MODE, false);
   InstallDescriptor(isolate, &stub);
 }
 
 
+// static
+void NewStringAddStub::InstallDescriptors(Isolate* isolate) {
+  NewStringAddStub stub(STRING_ADD_CHECK_NONE, NOT_TENURED);
+  InstallDescriptor(isolate, &stub);
+}
+
+
 ArrayConstructorStub::ArrayConstructorStub(Isolate* isolate)
     : argument_count_(ANY) {
   ArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate);
 }
 
 
 ArrayConstructorStub::ArrayConstructorStub(Isolate* isolate,
                                            int argument_count) {
   if (argument_count == 0) {
     argument_count_ = NONE;
@@ skipping 17 matching lines @@
   InstallDescriptor(isolate, &stub3);
 }
 
 InternalArrayConstructorStub::InternalArrayConstructorStub(
     Isolate* isolate) {
   InternalArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate);
 }
 
 
 } }  // namespace v8::internal