Revert "Parser: Delay internalizing strings and values." (r21841)

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(AstValueFactory* ast_value_factory,
-                                   Zone* zone)
-    : ast_value_factory_(ast_value_factory),
+FuncNameInferrer::FuncNameInferrer(Isolate* isolate, Zone* zone)
+    : isolate_(isolate),
       entries_stack_(10, zone),
       names_stack_(5, zone),
       funcs_to_infer_(4, zone),
       zone_(zone) {
 }
 
 
-void FuncNameInferrer::PushEnclosingName(const AstString* name) {
+void FuncNameInferrer::PushEnclosingName(Handle<String> 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->IsEmpty() && unibrow::Uppercase::Is(name->FirstCharacter())) {
+  if (name->length() > 0 && Runtime::IsUpperCaseChar(
+          isolate()->runtime_state(), name->Get(0))) {
     names_stack_.Add(Name(name, kEnclosingConstructorName), zone());
   }
 }
 
 
-void FuncNameInferrer::PushLiteralName(const AstString* name) {
-  if (IsOpen() && name != ast_value_factory_->prototype_string()) {
+void FuncNameInferrer::PushLiteralName(Handle<String> name) {
+  if (IsOpen() &&
+      !String::Equals(isolate()->factory()->prototype_string(), name)) {
     names_stack_.Add(Name(name, kLiteralName), zone());
   }
 }
 
 
-void FuncNameInferrer::PushVariableName(const AstString* name) {
-  if (IsOpen() && name != ast_value_factory_->dot_result_string()) {
+void FuncNameInferrer::PushVariableName(Handle<String> name) {
+  if (IsOpen() &&
+      !String::Equals(isolate()->factory()->dot_result_string(), name)) {
     names_stack_.Add(Name(name, kVariableName), zone());
   }
 }
 
 
-const AstString* FuncNameInferrer::MakeNameFromStack() {
-  // First see how many names we will use.
-  int length = 0;
-  bool one_byte = true;
-  int pos = 0;
-  while (pos < names_stack_.length()) {
-    if (pos < names_stack_.length() - 1 &&
-        names_stack_.at(pos).type == kVariableName &&
-        names_stack_.at(pos + 1).type == kVariableName) {
-      // Skip consecutive variable declarations.
-      ++pos;
-      continue;
+Handle<String> FuncNameInferrer::MakeNameFromStack() {
+  return MakeNameFromStackHelper(0, isolate()->factory()->empty_string());
+}
+
+
+Handle<String> FuncNameInferrer::MakeNameFromStackHelper(int pos,
+                                                         Handle<String> 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;
+      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();
+      return MakeNameFromStackHelper(pos + 1, curr);
+    } else {
+      return MakeNameFromStackHelper(pos + 1, names_stack_.at(pos).name);
     }
-    int cur_length = names_stack_.at(pos).name->length();
-    if (length + 1 + cur_length > String::kMaxLength) {
-      break;
-    }
-    if (length == 0) {
-      length = cur_length;
-    } else {  // Add the . between names.
-      length += (1 + cur_length);
-    }
-    one_byte = one_byte && names_stack_.at(pos).name->is_one_byte();
-    ++pos;
   }
-  const AstString* to_return = NULL;
-  const char* dot = ".";
-  if (one_byte) {
-    Vector<uint8_t> new_name = Vector<uint8_t>::New(length);
-    int name_pos = 0;
-    for (int i = 0; i < pos; ++i) {
-      if (i < names_stack_.length() - 1 &&
-          names_stack_.at(i).type == kVariableName &&
-          names_stack_.at(i + 1).type == kVariableName) {
-        // Skip consecutive variable declarations.
-        continue;
-      }
-      if (name_pos != 0) {
-        CopyChars(new_name.start() + name_pos, dot, 1);
-        ++name_pos;
-      }
-      CopyChars(new_name.start() + name_pos,
-                names_stack_.at(i).name->raw_data(),
-                names_stack_.at(i).name->length());
-      name_pos += names_stack_.at(i).name->length();
-    }
-    to_return = ast_value_factory_->GetOneByteString(Vector<const uint8_t>(
-        reinterpret_cast<const uint8_t*>(new_name.start()),
-        new_name.length()));
-    new_name.Dispose();
-  } else {
-    Vector<uint16_t> new_name = Vector<uint16_t>::New(length);
-    int name_pos = 0;
-    for (int i = 0; i < pos; ++i) {
-      if (i < names_stack_.length() - 1 &&
-          names_stack_.at(i).type == kVariableName &&
-          names_stack_.at(i + 1).type == kVariableName) {
-        // Skip consecutive variable declarations.
-        continue;
-      }
-      if (name_pos != 0) {
-        CopyChars(new_name.start() + name_pos, dot, 1);
-        ++name_pos;
-      }
-      if (names_stack_.at(i).name->is_one_byte()) {
-        CopyChars(new_name.start() + name_pos,
-                  names_stack_.at(i).name->raw_data(),
-                  names_stack_.at(i).name->length());
-      } else {
-        CopyChars(new_name.start() + name_pos,
-                  reinterpret_cast<const uint16_t*>(
-                      names_stack_.at(i).name->raw_data()),
-                  names_stack_.at(i).name->length());
-      }
-      name_pos += names_stack_.at(i).name->length();
-    }
-    to_return = ast_value_factory_->GetTwoByteString(Vector<const uint16_t>(
-        reinterpret_cast<const uint16_t*>(new_name.start()),
-        new_name.length()));
-    new_name.Dispose();
-  }
-  return to_return;
 }
 
 
 void FuncNameInferrer::InferFunctionsNames() {
-  const AstString* func_name = MakeNameFromStack();
+  Handle<String> func_name = MakeNameFromStack();
   for (int i = 0; i < funcs_to_infer_.length(); ++i) {
-    funcs_to_infer_[i]->set_raw_inferred_name(func_name);
+    funcs_to_infer_[i]->set_inferred_name(func_name);
   }
   funcs_to_infer_.Rewind(0);
 }
 
 
 } }  // namespace v8::internal