AOT: Single target stub.

runtime/vm/raw_object.h

Index: runtime/vm/raw_object.h
diff --git a/runtime/vm/raw_object.h b/runtime/vm/raw_object.h
index 14a9895d999cb7fca3877134d22c6f5f4e1e20a0..03969a39247a51554e3e922d57cac9bdc6df5155 100644
--- a/runtime/vm/raw_object.h
+++ b/runtime/vm/raw_object.h
@@ -39,6 +39,7 @@ namespace dart {
   V(ExceptionHandlers)                                                         \
   V(Context)                                                                   \
   V(ContextScope)                                                              \
+  V(SingleTargetCache)                                                         \
   V(ICData)                                                                    \
   V(MegamorphicCache)                                                          \
   V(SubtypeTestCache)                                                          \
@@ -1480,6 +1481,21 @@ class RawContextScope : public RawObject {
 };
 
 
+class RawSingleTargetCache : public RawObject {
+  RAW_HEAP_OBJECT_IMPLEMENTATION(SingleTargetCache);
+  RawObject** from() {
+    return reinterpret_cast<RawObject**>(&ptr()->target_);
+  }
+  RawCode* target_;
+  RawObject** to() {
+    return reinterpret_cast<RawObject**>(&ptr()->target_);
+  }
+  uword entry_point_;
+  classid_t lower_limit_;
+  classid_t upper_limit_;
+};
+
+
 class RawICData : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(ICData);