[stubs] Port CreateWeakCellStub to turbofan

src/code-stubs-hydrogen.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 <memory>
 
 #include "src/bailout-reason.h"
 #include "src/crankshaft/hydrogen.h"
@@ skipping 524 matching lines @@
   checker.End();
 
   return environment()->Pop();
 }
 
 
 Handle<Code> FastCloneShallowArrayStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
-
-template <>
-HValue* CodeStubGraphBuilder<CreateWeakCellStub>::BuildCodeStub() {
-  // This stub is performance sensitive, the generated code must be tuned
-  // so that it doesn't build an eager frame.
-  info()->MarkMustNotHaveEagerFrame();
-
-  HValue* size = Add<HConstant>(WeakCell::kSize);
-  HInstruction* object =
-      Add<HAllocate>(size, HType::JSObject(), TENURED, JS_OBJECT_TYPE,
-                     graph()->GetConstant0());
-
-  Handle<Map> weak_cell_map = isolate()->factory()->weak_cell_map();
-  AddStoreMapConstant(object, weak_cell_map);
-
-  HInstruction* value = GetParameter(Descriptor::kValue);
-  Add<HStoreNamedField>(object, HObjectAccess::ForWeakCellValue(), value);
-  Add<HStoreNamedField>(object, HObjectAccess::ForWeakCellNext(),
-                        graph()->GetConstantHole());
-
-  HInstruction* feedback_vector = GetParameter(Descriptor::kVector);
-  HInstruction* slot = GetParameter(Descriptor::kSlot);
-  Add<HStoreKeyed>(feedback_vector, slot, object, nullptr, FAST_ELEMENTS,
-                   INITIALIZING_STORE);
-  return graph()->GetConstant0();
-}
-
-
-Handle<Code> CreateWeakCellStub::GenerateCode() { return DoGenerateCode(this); }
-
-
 template <>
 HValue* CodeStubGraphBuilder<LoadScriptContextFieldStub>::BuildCodeStub() {
   int context_index = casted_stub()->context_index();
   int slot_index = casted_stub()->slot_index();
 
   HValue* script_context = BuildGetScriptContext(context_index);
   return Add<HLoadNamedField>(script_context, nullptr,
                               HObjectAccess::ForContextSlot(slot_index));
 }
 
@@ skipping 1548 matching lines @@
   return Pop();
 }
 
 
 Handle<Code> KeyedLoadGenericStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 }  // namespace internal
 }  // namespace v8