New try: Parser: Delay internalizing strings and values

src/func-name-inferrer.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/ast.h"
+#include "src/ast-value-factory.h"
 #include "src/func-name-inferrer.h"
 #include "src/list-inl.h"
 
 namespace v8 {
 namespace internal {
 
-FuncNameInferrer::FuncNameInferrer(Isolate* isolate, Zone* zone)
-    : isolate_(isolate),
+FuncNameInferrer::FuncNameInferrer(AstValueFactory* ast_value_factory,
+                                   Zone* zone)
+    : ast_value_factory_(ast_value_factory),
       entries_stack_(10, zone),
       names_stack_(5, zone),
       funcs_to_infer_(4, zone),
       zone_(zone) {
 }
 
 
-void FuncNameInferrer::PushEnclosingName(Handle<String> name) {
+void FuncNameInferrer::PushEnclosingName(const AstRawString* name) {
   // Enclosing name is a name of a constructor function. To check
   // that it is really a constructor, we check that it is not empty
   // and starts with a capital letter.
-  if (name->length() > 0 && Runtime::IsUpperCaseChar(
-          isolate()->runtime_state(), name->Get(0))) {
+  if (!name->IsEmpty() && unibrow::Uppercase::Is(name->FirstCharacter())) {
     names_stack_.Add(Name(name, kEnclosingConstructorName), zone());
   }
 }
 
 
-void FuncNameInferrer::PushLiteralName(Handle<String> name) {
-  if (IsOpen() &&
-      !String::Equals(isolate()->factory()->prototype_string(), name)) {
+void FuncNameInferrer::PushLiteralName(const AstRawString* name) {
+  if (IsOpen() && name != ast_value_factory_->prototype_string()) {
     names_stack_.Add(Name(name, kLiteralName), zone());
   }
 }
 
 
-void FuncNameInferrer::PushVariableName(Handle<String> name) {
-  if (IsOpen() &&
-      !String::Equals(isolate()->factory()->dot_result_string(), name)) {
+void FuncNameInferrer::PushVariableName(const AstRawString* name) {
+  if (IsOpen() && name != ast_value_factory_->dot_result_string()) {
     names_stack_.Add(Name(name, kVariableName), zone());
   }
 }
 
 
-Handle<String> FuncNameInferrer::MakeNameFromStack() {
-  return MakeNameFromStackHelper(0, isolate()->factory()->empty_string());
+const AstString* FuncNameInferrer::MakeNameFromStack() {
+  return MakeNameFromStackHelper(0, ast_value_factory_->empty_string());
 }
 
-
-Handle<String> FuncNameInferrer::MakeNameFromStackHelper(int pos,
-                                                         Handle<String> prev) {
+const AstString* FuncNameInferrer::MakeNameFromStackHelper(
+    int pos, const AstString* prev) {
   if (pos >= names_stack_.length()) return prev;
   if (pos < names_stack_.length() - 1 &&
       names_stack_.at(pos).type == kVariableName &&
       names_stack_.at(pos + 1).type == kVariableName) {
     // Skip consecutive variable declarations.
     return MakeNameFromStackHelper(pos + 1, prev);
   } else {
     if (prev->length() > 0) {
-      Handle<String> name = names_stack_.at(pos).name;
+      const AstRawString* name = names_stack_.at(pos).name;
       if (prev->length() + name->length() + 1 > String::kMaxLength) return prev;
-      Factory* factory = isolate()->factory();
-      Handle<String> curr =
-          factory->NewConsString(factory->dot_string(), name).ToHandleChecked();
-      curr = factory->NewConsString(prev, curr).ToHandleChecked();
+      const AstConsString* curr = ast_value_factory_->NewConsString(
+          ast_value_factory_->dot_string(), name);
+      curr = ast_value_factory_->NewConsString(prev, curr);
       return MakeNameFromStackHelper(pos + 1, curr);
     } else {
       return MakeNameFromStackHelper(pos + 1, names_stack_.at(pos).name);
     }
   }
 }
 
 
 void FuncNameInferrer::InferFunctionsNames() {
-  Handle<String> func_name = MakeNameFromStack();
+  const AstString* func_name = MakeNameFromStack();
   for (int i = 0; i < funcs_to_infer_.length(); ++i) {
-    funcs_to_infer_[i]->set_inferred_name(func_name);
+    funcs_to_infer_[i]->set_raw_inferred_name(func_name);
   }
   funcs_to_infer_.Rewind(0);
 }
 
 
 } }  // namespace v8::internal