Use the virtual-frame based optimizing compiler for split-compilation...

src/x64/codegen-x64.h

 // Copyright 2010 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 276 matching lines @@
   EAGER_ARGUMENTS_ALLOCATION,
   LAZY_ARGUMENTS_ALLOCATION
 };
 
 
 // -------------------------------------------------------------------------
 // CodeGenerator
 
 class CodeGenerator: public AstVisitor {
  public:
+  // Compilation mode.  Either the compiler is used as the primary
+  // compiler and needs to setup everything or the compiler is used as
+  // the secondary compiler for split compilation and has to handle
+  // bailouts.
+  enum Mode {
+    PRIMARY,
+    SECONDARY
+  };
+
   // Takes a function literal, generates code for it. This function should only
   // be called by compiler.cc.
   static Handle<Code> MakeCode(FunctionLiteral* fun,
                                Handle<Script> script,
                                bool is_eval,
                                CompilationInfo* info);
 
   // Printing of AST, etc. as requested by flags.
   static void MakeCodePrologue(FunctionLiteral* fun);
 
@@ skipping 67 matching lines @@
   // reach the end of the statement (ie, it does not exit via break,
   // continue, return, or throw).  This function is used temporarily while
   // the code generator is being transformed.
   void VisitAndSpill(Statement* statement);
 
   // Visit a list of statements and then spill the virtual frame if control
   // flow can reach the end of the list.
   void VisitStatementsAndSpill(ZoneList<Statement*>* statements);
 
   // Main code generation function
-  void GenCode(FunctionLiteral* fun, CompilationInfo* info);
+  void Generate(FunctionLiteral* fun, Mode mode, CompilationInfo* info);
 
   // Generate the return sequence code.  Should be called no more than
   // once per compiled function, immediately after binding the return
   // target (which can not be done more than once).
   void GenerateReturnSequence(Result* return_value);
 
   // Returns the arguments allocation mode.
   ArgumentsAllocationMode ArgumentsMode() const;
 
   // Store the arguments object and allocate it if necessary.
@@ skipping 419 matching lines @@
   Major MajorKey() { return StringCompare; }
   int MinorKey() { return 0; }
 
   void Generate(MacroAssembler* masm);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_CODEGEN_X64_H_