[stubs] Port KeyedStoreIC_Megamorphic stub to Turbofan

src/builtins/builtins-handler.cc

Index: src/builtins/builtins-handler.cc
diff --git a/src/builtins/builtins-handler.cc b/src/builtins/builtins-handler.cc
index 16070de4bee9378b1c0f9e7edcc6c76ddcba5885..88597f8add9afc32824c39405d3d7661ae5495d7 100644
--- a/src/builtins/builtins-handler.cc
+++ b/src/builtins/builtins-handler.cc
@@ -2,10 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "src/builtins/builtins.h"
 #include "src/builtins/builtins-utils.h"
+#include "src/builtins/builtins.h"
 #include "src/ic/handler-compiler.h"
 #include "src/ic/ic.h"
+#include "src/ic/keyed-store-generic.h"
 
 namespace v8 {
 namespace internal {
@@ -40,6 +41,32 @@ void Builtins::Generate_KeyedStoreIC_Megamorphic_Strict(MacroAssembler* masm) {
   KeyedStoreIC::GenerateMegamorphic(masm, STRICT);
 }
 
+void KeyedStoreICMegamorphic(CodeStubAssembler* assembler, LanguageMode mode) {
+  typedef compiler::Node Node;
+  typedef StoreWithVectorDescriptor Descriptor;
+
+  Node* receiver = assembler->Parameter(Descriptor::kReceiver);
+  Node* name = assembler->Parameter(Descriptor::kName);
+  Node* value = assembler->Parameter(Descriptor::kValue);
+  Node* slot = assembler->Parameter(Descriptor::kSlot);
+  Node* vector = assembler->Parameter(Descriptor::kVector);
+  Node* context = assembler->Parameter(Descriptor::kContext);
+
+  CodeStubAssembler::StoreICParameters p(context, receiver, name, value, slot,
+                                         vector);
+  KeyedStoreGenericGenerator::Generate(assembler, &p, mode);
+}
+
+void Builtins::Generate_KeyedStoreIC_Megamorphic_TF(
+    CodeStubAssembler* assembler) {
+  KeyedStoreICMegamorphic(assembler, SLOPPY);
+}
+
+void Builtins::Generate_KeyedStoreIC_Megamorphic_Strict_TF(
+    CodeStubAssembler* assembler) {
+  KeyedStoreICMegamorphic(assembler, STRICT);
+}
+
 void Builtins::Generate_KeyedStoreIC_Miss(MacroAssembler* masm) {
   KeyedStoreIC::GenerateMiss(masm);
 }