[stubs]: Implement ArrayNoArgumentConstructor as a TF stub

src/code-stubs.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/code-stubs.h"
 
 #include <sstream>
 
 #include "src/bootstrapper.h"
 #include "src/code-factory.h"
@@ skipping 4232 matching lines @@
 
 
 void ProfileEntryHookStub::EntryHookTrampoline(intptr_t function,
                                                intptr_t stack_pointer,
                                                Isolate* isolate) {
   FunctionEntryHook entry_hook = isolate->function_entry_hook();
   DCHECK(entry_hook != NULL);
   entry_hook(function, stack_pointer);
 }
 
+void ArrayNoArgumentConstructorStub::GenerateAssembly(
+    CodeStubAssembler* assembler) const {
+  typedef compiler::Node Node;
+  Node* native_context = assembler->LoadObjectField(assembler->Parameter(0),

[mvstanton, 2016/05/02 12:40:08]

It would be better if the interface descriptor has a name for each index, like
kContext, kAllocationSite, kArgumentCount.

[danno, 2016/05/02 15:26:21]

Done.

+                                                    JSFunction::kContextOffset);
+  bool track_allocation_site =
+      AllocationSite::GetMode(elements_kind()) == TRACK_ALLOCATION_SITE &&
+      override_mode() != DISABLE_ALLOCATION_SITES;
+  Node* allocation_site =
+      track_allocation_site ? assembler->Parameter(1) : nullptr;
+  Node* array = assembler->AllocateJSArray(elements_kind(), native_context,
+                                           JSArray::kPreallocatedArrayElements,
+                                           0, allocation_site);
+  assembler->Return(array);
+}
 
 ArrayConstructorStub::ArrayConstructorStub(Isolate* isolate)
     : PlatformCodeStub(isolate) {
   minor_key_ = ArgumentCountBits::encode(ANY);
   ArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate);
 }
 
 
 ArrayConstructorStub::ArrayConstructorStub(Isolate* isolate,
                                            int argument_count)
@@ skipping 29 matching lines @@
   if (type->Is(Type::UntaggedPointer())) {
     return Representation::External();
   }
 
   DCHECK(!type->Is(Type::Untagged()));
   return Representation::Tagged();
 }
 
 }  // namespace internal
 }  // namespace v8