Implement many KeyedStoreStubs using Crankshaft

src/ia32/stub-cache-ia32.cc

Index: src/ia32/stub-cache-ia32.cc
diff --git a/src/ia32/stub-cache-ia32.cc b/src/ia32/stub-cache-ia32.cc
index 710b232c6fb7ee0dd2bc4609a97e6cf79456e391..421f9eacbb171bf0244a5732b057c60e1795cf73 100644
--- a/src/ia32/stub-cache-ia32.cc
+++ b/src/ia32/stub-cache-ia32.cc
@@ -2769,13 +2769,21 @@ Handle<Code> KeyedStoreStubCompiler::CompileStoreElement(
   //  -- esp[0] : return address
   // -----------------------------------
   ElementsKind elements_kind = receiver_map->elements_kind();
-  bool is_jsarray = receiver_map->instance_type() == JS_ARRAY_TYPE;
-  Handle<Code> stub =
-      KeyedStoreElementStub(is_jsarray,
-                            elements_kind,
-                            store_mode_).GetCode(isolate());
-
-  __ DispatchMap(edx, receiver_map, stub, DO_SMI_CHECK);
+  bool is_js_array = receiver_map->instance_type() == JS_ARRAY_TYPE;
+  if (FLAG_compiled_keyed_stores &&
+      (receiver_map->has_fast_elements() ||
+       receiver_map->has_external_array_elements())) {
+    Handle<Code> stub = KeyedStoreFastElementStub(
+        is_js_array,
+        elements_kind,
+        store_mode_).GetCode(isolate());
+    __ DispatchMap(edx, receiver_map, stub, DO_SMI_CHECK);
+  } else {
+    Handle<Code> stub =
+        KeyedStoreElementStub(is_js_array, elements_kind,
+                              store_mode_).GetCode(isolate());
+    __ DispatchMap(edx, receiver_map, stub, DO_SMI_CHECK);
+  }
 
   TailCallBuiltin(masm(), MissBuiltin(kind()));