Encode any deoptimizer entry in serialized data.

src/external-reference-table.h

 // Copyright 2016 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_EXTERNAL_REFERENCE_TABLE_H_
 #define V8_EXTERNAL_REFERENCE_TABLE_H_
 
 #include "src/address-map.h"
 
 namespace v8 {
@@ skipping 16 matching lines @@
 
 #ifdef DEBUG
   void increment_count(uint32_t i) { refs_[i].count++; }
   int count(uint32_t i) { return refs_[i].count; }
   void ResetCount();
   void PrintCount();
 #endif  // DEBUG
 
   static const char* ResolveSymbol(void* address);
 
-  static const int kDeoptTableSerializeEntryCount = 64;
+  // NOTE: SnapshotByteSink::PutInt reserves top 2 bits of integer
+  static const uint32_t kSpecialIdMask = 7 << 27;
+  static const uint32_t kEagerDeoptFlag = 1 << 27;
+  static const uint32_t kLazyDeoptFlag = 2 << 27;
+  static const uint32_t kSoftDeoptFlag = 3 << 27;

[Yang, 2017/03/31 06:58:16]

We can have at most 16k entries. See Deoptimizer::kMaxNumberOfEntries

With this CL, I think we can also remove Deoptimizer::kMinNumberOfEntries

 
  private:
   struct ExternalReferenceEntry {
     Address address;
     const char* name;
 #ifdef DEBUG
     int count;
 #endif  // DEBUG
   };
 
   explicit ExternalReferenceTable(Isolate* isolate);
 
   void Add(Address address, const char* name) {
 #ifdef DEBUG
     ExternalReferenceEntry entry = {address, name, 0};
 #else
     ExternalReferenceEntry entry = {address, name};
 #endif  // DEBUG
     refs_.Add(entry);
   }
 
   void AddReferences(Isolate* isolate);
   void AddBuiltins(Isolate* isolate);
   void AddRuntimeFunctions(Isolate* isolate);
   void AddIsolateAddresses(Isolate* isolate);
   void AddAccessors(Isolate* isolate);
   void AddStubCache(Isolate* isolate);
-  void AddDeoptEntries(Isolate* isolate);
   void AddApiReferences(Isolate* isolate);
 
   List<ExternalReferenceEntry> refs_;
   uint32_t api_refs_start_;
 
   DISALLOW_COPY_AND_ASSIGN(ExternalReferenceTable);
 };
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_EXTERNAL_REFERENCE_TABLE_H_