Deoptimization support for accessors.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index 5e5ba52078a94ba0f44a3e79ed44b74caf1a8bda..121d1b9377630db94ef0282e030c5f4da218b1d1 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);