Move the is_pregenerated flag so it does not overlap other flags.

src/code-stubs.h

 // Copyright 2011 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 32 matching lines @@
   V(SubString)                           \
   V(StringCompare)                       \
   V(Compare)                             \
   V(CompareIC)                           \
   V(MathPow)                             \
   V(RecordWrite)                         \
   V(StoreBufferOverflow)                 \
   V(RegExpExec)                          \
   V(TranscendentalCache)                 \
   V(Instanceof)                          \
-  /* All stubs above this line only exist in a few versions, which are  */  \
-  /* generated ahead of time.  Therefore compiling a call to one of     */  \
-  /* them can't cause a new stub to be compiled, so compiling a call to */  \
-  /* them is GC safe.  The ones below this line exist in many variants  */  \
-  /* so code compiling a call to one can cause a GC.  This means they   */  \
-  /* can't be called from other stubs, since stub generation code is    */  \
-  /* not GC safe.                                                       */  \
   V(ConvertToDouble)                     \
   V(WriteInt32ToHeapNumber)              \
   V(StackCheck)                          \
   V(FastNewClosure)                      \
   V(FastNewContext)                      \
   V(FastCloneShallowArray)               \
   V(RevertToNumber)                      \
   V(ToBoolean)                           \
   V(ToNumber)                            \
   V(CounterOp)                           \
@@ skipping 77 matching lines @@
   bool CompilingCallsToThisStubIsGCSafe() {
     bool is_pregenerated = IsPregenerated();
 #ifdef DEBUG
     Code* code = NULL;
     ASSERT(!is_pregenerated || FindCodeInCache(&code));
 #endif
     return is_pregenerated;
   }
 
   // See comment above, where Instanceof is defined.
-  virtual bool IsPregenerated() {
-    return MajorKey() <= Instanceof;
-  }
+  virtual bool IsPregenerated() { return false; }
 
   static void GenerateStubsAheadOfTime();
   static void GenerateFPStubs();
 
   // Some stubs put untagged junk on the stack that cannot be scanned by the
   // GC.  This means that we must be statically sure that no GC can occur while
   // they are running.  If that is the case they should override this to return
   // true, which will cause an assertion if we try to call something that can
   // GC or if we try to put a stack frame on top of the junk, which would not
   // result in a traversable stack.
@@ skipping 397 matching lines @@
                       SaveFPRegsMode save_doubles = kDontSaveFPRegs)
       : result_size_(result_size), save_doubles_(save_doubles) { }
 
   void Generate(MacroAssembler* masm);
 
   // The version of this stub that doesn't save doubles is generated ahead of
   // time, so it's OK to call it from other stubs that can't cope with GC during
   // their code generation.  On machines that always have gp registers (x64) we
   // can generate both variants ahead of time.
   virtual bool IsPregenerated();
+  static void GenerateFixedRegStubsAheadOfTime();
 
  private:
   void GenerateCore(MacroAssembler* masm,
                     Label* throw_normal_exception,
                     Label* throw_termination_exception,
                     Label* throw_out_of_memory_exception,
                     bool do_gc,
                     bool always_allocate_scope);
   void GenerateThrowTOS(MacroAssembler* masm);
   void GenerateThrowUncatchable(MacroAssembler* masm,
@@ skipping 427 matching lines @@
                     bool result);
   void GenerateTypeTransition(MacroAssembler* masm);
 
   Register tos_;
   Types types_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_