Deoptimization support for accessors.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index f01af258bcd13cef73ac88e6cf1b14dda8f71d82..729c8de072474a93a863d4cb84a809eed274f98e 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -150,7 +150,8 @@ namespace internal {
   V(Smi, real_stack_limit, RealStackLimit)                                     \
   V(StringDictionary, intrinsic_function_names, IntrinsicFunctionNames)        \
   V(Smi, arguments_adaptor_deopt_pc_offset, ArgumentsAdaptorDeoptPCOffset)     \
-  V(Smi, construct_stub_deopt_pc_offset, ConstructStubDeoptPCOffset)
+  V(Smi, construct_stub_deopt_pc_offset, ConstructStubDeoptPCOffset)           \
+  V(Smi, setter_stub_deopt_pc_offset, SetterStubDeoptPCOffset)
 
 #define ROOT_LIST(V)                                  \
   STRONG_ROOT_LIST(V)                                 \
@@ -1585,6 +1586,11 @@ class Heap {
     set_construct_stub_deopt_pc_offset(Smi::FromInt(pc_offset));
   }
 
+  void SetSetterStubDeoptPCOffset(int pc_offset) {
+    ASSERT(setter_stub_deopt_pc_offset() == Smi::FromInt(0));
+    set_setter_stub_deopt_pc_offset(Smi::FromInt(pc_offset));
+  }
+
   // For post mortem debugging.
   void RememberUnmappedPage(Address page, bool compacted);