Avoid (some) symbol lookups at parse time if preparse data is available.

test/cctest/test-api.cc

 // Copyright 2007-2009 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 19 matching lines @@
 #include "v8.h"
 
 #include "api.h"
 #include "compilation-cache.h"
 #include "execution.h"
 #include "snapshot.h"
 #include "platform.h"
 #include "top.h"
 #include "utils.h"
 #include "cctest.h"
+#include "parser.h"
 
 static const bool kLogThreading = true;
 
 static bool IsNaN(double x) {
 #ifdef WIN32
   return _isnan(x);
 #else
   return isnan(x);
 #endif
 }
@@ skipping 8544 matching lines @@
   v8::V8::Initialize();
   v8::HandleScope scope;
   LocalContext context;
 
   const char* script = "function foo(){ return 5;}\n"
       "function bar(){ return 6 + 7;}  foo();";
   v8::ScriptData* sd =
       v8::ScriptData::PreCompile(script, i::StrLength(script));
   CHECK(!sd->HasError());
   // ScriptDataImpl private implementation details
-  const int kUnsignedSize = sizeof(unsigned);
-  const int kHeaderSize = 4;
-  const int kFunctionEntrySize = 5;
+  const int kHeaderSize = i::ScriptDataImpl::kHeaderSize;
+  const int kFunctionEntrySize = i::FunctionEntry::kSize;
   const int kFunctionEntryStartOffset = 0;
   const int kFunctionEntryEndOffset = 1;
   unsigned* sd_data =
       reinterpret_cast<unsigned*>(const_cast<char*>(sd->Data()));
-  CHECK_EQ(sd->Length(),
-           (kHeaderSize + 2 * kFunctionEntrySize) * kUnsignedSize);
 
   // Overwrite function bar's end position with 0.
   sd_data[kHeaderSize + 1 * kFunctionEntrySize + kFunctionEntryEndOffset] = 0;
   v8::TryCatch try_catch;
 
   Local<String> source = String::New(script);
   Local<Script> compiled_script = Script::New(source, NULL, sd);
   CHECK(try_catch.HasCaught());
   String::AsciiValue exception_value(try_catch.Message()->Get());
   CHECK_EQ("Uncaught SyntaxError: Invalid preparser data for function bar",
@@ skipping 2657 matching lines @@
   ExpectFalse("Object.prototype.hasOwnProperty.call(other, \'0\')");
 
   CHECK_EQ(false, global0->HasRealIndexedProperty(0));
   CHECK_EQ(false, global0->HasRealNamedProperty(v8_str("x")));
   CHECK_EQ(false, global0->HasRealNamedCallbackProperty(v8_str("x")));
 
   // Reset the failed access check callback so it does not influence
   // the other tests.
   v8::V8::SetFailedAccessCheckCallbackFunction(NULL);
 }