Add support for keyed-call on arrays of fast elements

src/code-stubs-hydrogen.cc

Index: src/code-stubs-hydrogen.cc
diff --git a/src/code-stubs-hydrogen.cc b/src/code-stubs-hydrogen.cc
index a7901796966b42c23e1a64d1a8bbab01ab4c2261..7a102e86464234d529f2b28641b116b12e14070f 100644
--- a/src/code-stubs-hydrogen.cc
+++ b/src/code-stubs-hydrogen.cc
@@ -594,6 +594,32 @@ Handle<Code> KeyedLoadFieldStub::GenerateCode(Isolate* isolate) {
 }
 
 
+template<>
+HValue* CodeStubGraphBuilder<KeyedArrayCallStub>::BuildCodeStub() {
+  int argc = casted_stub()->argc() + 1;
+  info()->set_parameter_count(argc);
+
+  HValue* receiver = Add<HParameter>(1);
+
+  // Load the expected initial array map from the context.
+  JSArrayBuilder array_builder(this, casted_stub()->elements_kind());
+  HValue* map = array_builder.EmitMapCode();
+
+  HValue* checked_receiver = Add<HCheckMapValue>(receiver, map);
+
+  HValue* function = BuildUncheckedMonomorphicElementAccess(
+      checked_receiver, GetParameter(0),
+      NULL, true, casted_stub()->elements_kind(),
+      false, NEVER_RETURN_HOLE, STANDARD_STORE);
+  return Add<HCallFunction>(function, argc, TAIL_CALL);
+}
+
+
+Handle<Code> KeyedArrayCallStub::GenerateCode(Isolate* isolate) {
+  return DoGenerateCode(isolate, this);
+}
+
+
 template <>
 HValue* CodeStubGraphBuilder<KeyedStoreFastElementStub>::BuildCodeStub() {
   BuildUncheckedMonomorphicElementAccess(