Proof of concept: API for doing only one parsing pass instead of first preparsing and then parsing.

src/compiler.h

 // 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 59 matching lines @@
   bool is_in_loop() const { return IsInLoop::decode(flags_); }
   FunctionLiteral* function() const { return function_; }
   Scope* scope() const { return scope_; }
   Scope* global_scope() const { return global_scope_; }
   Handle<Code> code() const { return code_; }
   Handle<JSFunction> closure() const { return closure_; }
   Handle<SharedFunctionInfo> shared_info() const { return shared_info_; }
   Handle<Script> script() const { return script_; }
   HydrogenCodeStub* code_stub() const {return code_stub_; }
   v8::Extension* extension() const { return extension_; }
-  ScriptDataImpl* pre_parse_data() const { return pre_parse_data_; }
+  ScriptDataImpl** cached_data() const { return cached_data_; }
   Handle<Context> context() const { return context_; }
   BailoutId osr_ast_id() const { return osr_ast_id_; }
   Handle<Code> unoptimized_code() const { return unoptimized_code_; }
   int opt_count() const { return opt_count_; }
   int num_parameters() const;
   int num_heap_slots() const;
   Code::Flags flags() const;
 
   void MarkAsEval() {
     ASSERT(!is_lazy());
@@ skipping 85 matching lines @@
     global_scope_ = global_scope;
   }
   Handle<FixedArray> feedback_vector() const {
     return feedback_vector_;
   }
   void SetCode(Handle<Code> code) { code_ = code; }
   void SetExtension(v8::Extension* extension) {
     ASSERT(!is_lazy());
     extension_ = extension;
   }
-  void SetPreParseData(ScriptDataImpl* pre_parse_data) {
+  void SetCachedData(ScriptDataImpl** cached_data) {
     ASSERT(!is_lazy());
-    pre_parse_data_ = pre_parse_data;
+    cached_data_ = cached_data;
   }
   void SetContext(Handle<Context> context) {
     context_ = context;
   }
 
   void MarkCompilingForDebugging() {
     flags_ |= IsCompilingForDebugging::encode(true);
   }
   bool IsCompilingForDebugging() {
     return IsCompilingForDebugging::decode(flags_);
@@ skipping 194 matching lines @@
   // The compiled code.
   Handle<Code> code_;
 
   // Possible initial inputs to the compilation process.
   Handle<JSFunction> closure_;
   Handle<SharedFunctionInfo> shared_info_;
   Handle<Script> script_;
 
   // Fields possibly needed for eager compilation, NULL by default.
   v8::Extension* extension_;
-  ScriptDataImpl* pre_parse_data_;
+  ScriptDataImpl** cached_data_;
 
   // The context of the caller for eval code, and the global context for a
   // global script. Will be a null handle otherwise.
   Handle<Context> context_;
 
   // Used by codegen, ultimately kept rooted by the SharedFunctionInfo.
   Handle<FixedArray> feedback_vector_;
 
   // Compilation mode flag and whether deoptimization is allowed.
   Mode mode_;
@@ skipping 209 matching lines @@
                                                 int scope_position);
 
   // Compile a String source within a context.
   static Handle<SharedFunctionInfo> CompileScript(Handle<String> source,
                                                   Handle<Object> script_name,
                                                   int line_offset,
                                                   int column_offset,
                                                   bool is_shared_cross_origin,
                                                   Handle<Context> context,
                                                   v8::Extension* extension,
-                                                  ScriptDataImpl* pre_data,
+                                                  ScriptDataImpl** pre_data,
                                                   NativesFlag is_natives_code);
 
   // Create a shared function info object (the code may be lazily compiled).
   static Handle<SharedFunctionInfo> BuildFunctionInfo(FunctionLiteral* node,
                                                       Handle<Script> script);
 
   enum ConcurrencyMode { NOT_CONCURRENT, CONCURRENT };
 
   // Generate and return optimized code or start a concurrent optimization job.
   // In the latter case, return the InOptimizationQueue builtin.  On failure,
@@ skipping 34 matching lines @@
   unsigned info_zone_start_allocation_size_;
   ElapsedTimer timer_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilationPhase);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_COMPILER_H_