Update the bits reserved for the gap size in the depotimization table...

src/safepoint-table.h

 // Copyright 2010 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 51 matching lines @@
     ASSERT(index < length_);
     unsigned value = Memory::uint32_at(GetDeoptimizationLocation(index));
     return GapCodeSizeField::decode(value);
   }
 
   uint8_t* GetEntry(unsigned index) const {
     ASSERT(index < length_);
     return &Memory::uint8_at(entries_ + (index * entry_size_));
   }
 
-  class GapCodeSizeField: public BitField<unsigned, 0, 8> {};
-  class DeoptimizationIndexField: public BitField<int, 8, 24> {};
+  // Reserve 13 bits for the gap code size. On ARM a constant pool can be
+  // emitted when generating the gap code. The size of the const pool is less
+  // than what can be represented in 12 bits, so 13 bits gives room for having
+  // instructions before potentially emitting a constant pool.
+  static const int kGapCodeSizeBits = 13;
+  static const int kDeoptIndexBits = 32 - kGapCodeSizeBits;
+  class GapCodeSizeField: public BitField<unsigned, 0, kGapCodeSizeBits> {};
+  class DeoptimizationIndexField:
+      public BitField<int, kGapCodeSizeBits, kDeoptIndexBits> {};
 
   static bool HasRegisters(uint8_t* entry);
   static bool HasRegisterAt(uint8_t* entry, int reg_index);
 
   void PrintEntry(unsigned index) const;
 
  private:
   static const uint8_t kNoRegisters = 0xFF;
 
   static const int kLengthOffset = 0;
@@ skipping 23 matching lines @@
 
   Address pc_and_deoptimization_indexes_;
   Address entries_;
 
   friend class SafepointTableBuilder;
 };
 
 
 class Safepoint BASE_EMBEDDED {
  public:
-  static const int kNoDeoptimizationIndex = 0x00ffffff;
+  static const int kNoDeoptimizationIndex =
+      (1 << (SafepointTable::kDeoptIndexBits)) - 1;
 
   void DefinePointerSlot(int index) { indexes_->Add(index); }
   void DefinePointerRegister(Register reg) { registers_->Add(reg.code()); }
 
  private:
   Safepoint(ZoneList<int>* indexes, ZoneList<int>* registers) :
       indexes_(indexes), registers_(registers) { }
   ZoneList<int>* indexes_;
   ZoneList<int>* registers_;
 
@@ skipping 52 matching lines @@
 
   bool emitted_;
   unsigned offset_;
 
   DISALLOW_COPY_AND_ASSIGN(SafepointTableBuilder);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_SAFEPOINT_TABLE_H_