Crankshaft is now able to compile top level code even if there is a ScriptContext.

src/utils.h

 // Copyright 2012 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.
 
 #ifndef V8_UTILS_H_
 #define V8_UTILS_H_
 
 #include <limits.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 1066 matching lines @@
 typedef VectorSlot<0> FeedbackVectorSlot;
 typedef VectorSlot<1> FeedbackVectorICSlot;
 
 
 class BailoutId {
  public:
   explicit BailoutId(int id) : id_(id) { }
   int ToInt() const { return id_; }
 
   static BailoutId None() { return BailoutId(kNoneId); }
+  static BailoutId Prologue() { return BailoutId(kPrologueId); }
   static BailoutId FunctionEntry() { return BailoutId(kFunctionEntryId); }
   static BailoutId Declarations() { return BailoutId(kDeclarationsId); }
   static BailoutId FirstUsable() { return BailoutId(kFirstUsableId); }
   static BailoutId StubEntry() { return BailoutId(kStubEntryId); }
 
   bool IsNone() const { return id_ == kNoneId; }
   bool operator==(const BailoutId& other) const { return id_ == other.id_; }
   bool operator!=(const BailoutId& other) const { return id_ != other.id_; }
   friend size_t hash_value(BailoutId);
   friend std::ostream& operator<<(std::ostream&, BailoutId);
 
  private:
   static const int kNoneId = -1;
 
   // Using 0 could disguise errors.
+  static const int kPrologueId = 1;
   static const int kFunctionEntryId = 2;
 
   // This AST id identifies the point after the declarations have been visited.
   // We need it to capture the environment effects of declarations that emit
   // code (function declarations).
   static const int kDeclarationsId = 3;
 
   // Every FunctionState starts with this id.
   static const int kFirstUsableId = 4;
 
@@ skipping 625 matching lines @@
   uint32_t* ptr = reinterpret_cast<uint32_t*>(p);
   *ptr = c.u[0];
   *(ptr + 1) = c.u[1];
 #endif  // V8_TARGET_ARCH_MIPS
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_UTILS_H_