Implement kToBeExecutedOnceCodeAge.

src/objects.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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 5518 matching lines @@
   DECLARE_VERIFIER(Code)
 
   void ClearInlineCaches();
   void ClearInlineCaches(Kind kind);
 
   BailoutId TranslatePcOffsetToAstId(uint32_t pc_offset);
   uint32_t TranslateAstIdToPcOffset(BailoutId ast_id);
 
 #define DECLARE_CODE_AGE_ENUM(X) k##X##CodeAge,
   enum Age {
+    kToBeExecutedOnceCodeAge = -3,
     kNotExecutedCodeAge = -2,
     kExecutedOnceCodeAge = -1,
     kNoAgeCodeAge = 0,
     CODE_AGE_LIST(DECLARE_CODE_AGE_ENUM)
     kAfterLastCodeAge,
-    kFirstCodeAge = kNotExecutedCodeAge,
+    kFirstCodeAge = kToBeExecutedOnceCodeAge,
     kLastCodeAge = kAfterLastCodeAge - 1,
-    kCodeAgeCount = kAfterLastCodeAge - kNotExecutedCodeAge - 1,
+    kCodeAgeCount = kAfterLastCodeAge - kFirstCodeAge - 1,
     kIsOldCodeAge = kSexagenarianCodeAge,
     kPreAgedCodeAge = kIsOldCodeAge - 1
   };
 #undef DECLARE_CODE_AGE_ENUM
 
   // Code aging.  Indicates how many full GCs this code has survived without
   // being entered through the prologue.  Used to determine when it is
   // relatively safe to flush this code object and replace it with the lazy
   // compilation stub.
   static void MakeCodeAgeSequenceYoung(byte* sequence, Isolate* isolate);
   static void MarkCodeAsExecuted(byte* sequence, Isolate* isolate);
   void MakeYoung(Isolate* isolate);
+  void MarkToBeExecutedOnce(Isolate* isolate);
   void MakeOlder(MarkingParity);
   static bool IsYoungSequence(Isolate* isolate, byte* sequence);
   bool IsOld();
   Age GetAge();
-  // Gets the raw code age, including psuedo code-age values such as
-  // kNotExecutedCodeAge and kExecutedOnceCodeAge.
-  Age GetRawAge();
   static inline Code* GetPreAgedCodeAgeStub(Isolate* isolate) {
     return GetCodeAgeStub(isolate, kNotExecutedCodeAge, NO_MARKING_PARITY);
   }
 
   void PrintDeoptLocation(FILE* out, Address pc);
   bool CanDeoptAt(Address pc);
 
 #ifdef VERIFY_HEAP
   void VerifyEmbeddedObjectsDependency();
 #endif
@@ skipping 5521 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_