Fix method dispatch in Keyed/StoreIC, and JumpIfNotUniqueName usage

src/ic/x64/ic-compiler-x64.cc

Index: src/ic/x64/ic-compiler-x64.cc
diff --git a/src/ic/x64/ic-compiler-x64.cc b/src/ic/x64/ic-compiler-x64.cc
index 3d7cc685d5e4c9f5d1957eaf44158ef369a6d30b..a5848b6dda231369ee78e984bf8542de1487027c 100644
--- a/src/ic/x64/ic-compiler-x64.cc
+++ b/src/ic/x64/ic-compiler-x64.cc
@@ -82,7 +82,11 @@ Handle<Code> PropertyICCompiler::CompilePolymorphic(TypeHandleList* types,
     // In case we are compiling an IC for dictionary loads and stores, just
     // check whether the name is unique.
     if (name.is_identical_to(isolate()->factory()->normal_ic_symbol())) {
-      __ JumpIfNotUniqueName(this->name(), &miss);
+      Register tmp = scratch1();
+      __ JumpIfSmi(this->name(), &miss);
+      __ movp(tmp, FieldOperand(this->name(), HeapObject::kMapOffset));
+      __ movzxbp(tmp, FieldOperand(tmp, Map::kInstanceTypeOffset));
+      __ JumpIfNotUniqueNameInstanceType(tmp, &miss);
     } else {
       __ Cmp(this->name(), name);
       __ j(not_equal, &miss);