Also support smi in load-ICs.

src/stub-cache.cc

Index: src/stub-cache.cc
diff --git a/src/stub-cache.cc b/src/stub-cache.cc
index e05d254f2180d66545206d2449a4a38087e6b300..4403d77dd9e3061fa8a143ab314078c866809cd2 100644
--- a/src/stub-cache.cc
+++ b/src/stub-cache.cc
@@ -135,7 +135,7 @@ Handle<Code> StubCache::FindHandler(Handle<Name> name,
 
 
 Handle<Code> StubCache::ComputeMonomorphicIC(Handle<Name> name,
-                                             Handle<HeapObject> object,
+                                             Handle<Object> object,
                                              Handle<Code> handler,
                                              StrictModeFlag strict_mode) {
   Code::Kind kind = handler->handler_kind();
@@ -149,7 +149,7 @@ Handle<Code> StubCache::ComputeMonomorphicIC(Handle<Name> name,
       name, stub_holder_map, kind, strict_mode, cache_holder);
   if (!ic.is_null()) return ic;
 
-  Handle<Map> map(object->map());
+  Handle<Map> map(object->GetMarkerMap(isolate()));
   if (kind == Code::LOAD_IC) {
     LoadStubCompiler ic_compiler(isolate(), cache_holder);
     ic = ic_compiler.CompileMonomorphicIC(map, handler, name);