Write buffer based write barrier for IA32 and Crankshaft. Currently...

src/code-stubs.h

 // Copyright 2006-2008 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 29 matching lines @@
   V(GenericBinaryOp)                     \
   V(TypeRecordingBinaryOp)               \
   V(StringAdd)                           \
   V(StringCharAt)                        \
   V(SubString)                           \
   V(StringCompare)                       \
   V(SmiOp)                               \
   V(Compare)                             \
   V(CompareIC)                           \
   V(MathPow)                             \
+  V(WriteBufferOverflow)                 \
   V(TranscendentalCache)                 \
   V(RecordWrite)                         \
   V(ConvertToDouble)                     \
   V(WriteInt32ToHeapNumber)              \
   V(IntegerMod)                          \
   V(StackCheck)                          \
   V(FastNewClosure)                      \
   V(FastNewContext)                      \
   V(FastCloneShallowArray)               \
   V(GenericUnaryOp)                      \
@@ skipping 505 matching lines @@
     } else {
       PrintF("\n");
     }
   }
 #endif
 };
 
 
 class CEntryStub : public CodeStub {
  public:
-  explicit CEntryStub(int result_size)
-      : result_size_(result_size), save_doubles_(false) { }
+  explicit CEntryStub(int result_size,
+                      SaveFPRegsMode save_doubles = kDontSaveFPRegs)
+      : result_size_(result_size), save_doubles_(save_doubles) { }
 
   void Generate(MacroAssembler* masm);
-  void SaveDoubles() { save_doubles_ = true; }
 
  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,
                     int alignment_skew = 0);
   void GenerateThrowTOS(MacroAssembler* masm);
   void GenerateThrowUncatchable(MacroAssembler* masm,
                                 UncatchableExceptionType type);
 
   // Number of pointers/values returned.
   const int result_size_;
-  bool save_doubles_;
+  SaveFPRegsMode save_doubles_;
 
   Major MajorKey() { return CEntry; }
   int MinorKey();
 
   const char* GetName() { return "CEntryStub"; }
 };
 
 
 class JSEntryStub : public CodeStub {
  public:
@@ skipping 292 matching lines @@
  private:
   StringCharCodeAtGenerator char_code_at_generator_;
   StringCharFromCodeGenerator char_from_code_generator_;
 
   DISALLOW_COPY_AND_ASSIGN(StringCharAtGenerator);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_