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

src/x64/lithium-x64.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_X64_LITHIUM_X64_H_
 #define V8_X64_LITHIUM_X64_H_
 
 #include "src/hydrogen.h"
 #include "src/lithium.h"
 #include "src/lithium-allocator.h"
@@ skipping 111 matching lines @@
   V(ModByPowerOf2I)                          \
   V(ModI)                                    \
   V(MulI)                                    \
   V(NumberTagD)                              \
   V(NumberTagI)                              \
   V(NumberTagU)                              \
   V(NumberUntagD)                            \
   V(OsrEntry)                                \
   V(Parameter)                               \
   V(Power)                                   \
+  V(Prologue)                                \
   V(PushArgument)                            \
   V(RegExpLiteral)                           \
   V(Return)                                  \
   V(SeqStringGetChar)                        \
   V(SeqStringSetChar)                        \
   V(ShiftI)                                  \
   V(SmiTag)                                  \
   V(SmiUntag)                                \
   V(StackCheck)                              \
   V(StoreCodeEntry)                          \
@@ skipping 244 matching lines @@
   void PrintDataTo(StringStream* stream) override;
   bool IsControl() const override { return true; }
 
   int block_id() const { return block_->block_id(); }
 
  private:
   HBasicBlock* block_;
 };
 
 
+class LPrologue final : public LTemplateInstruction<0, 0, 0> {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(Prologue, "prologue")
+};
+
+
 class LLazyBailout final : public LTemplateInstruction<0, 0, 0> {
  public:
   LLazyBailout() : gap_instructions_size_(0) { }
 
   DECLARE_CONCRETE_INSTRUCTION(LazyBailout, "lazy-bailout")
 
   void set_gap_instructions_size(int gap_instructions_size) {
     gap_instructions_size_ = gap_instructions_size;
   }
   int gap_instructions_size() { return gap_instructions_size_; }
@@ skipping 2461 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::int
 
 #endif  // V8_X64_LITHIUM_X64_H_