[promises] Port CreateResolvingFunctions to TF

src/code-stub-assembler.cc

 // Copyright 2016 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-stub-assembler.h"
 #include "src/code-factory.h"
 #include "src/frames-inl.h"
 #include "src/frames.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 1364 matching lines @@
 }
 
 Node* CodeStubAssembler::StoreContextElement(Node* context, Node* slot_index,
                                              Node* value) {
   Node* offset =
       IntPtrAdd(WordShl(slot_index, kPointerSizeLog2),
                 IntPtrConstant(Context::kHeaderSize - kHeapObjectTag));
   return Store(context, offset, value);
 }
 
+Node* CodeStubAssembler::StoreContextElementNoWriteBarrier(Node* context,
+                                                           int slot_index,
+                                                           Node* value) {
+  int offset = Context::SlotOffset(slot_index);
+  return StoreNoWriteBarrier(MachineRepresentation::kTagged, context,
+                             IntPtrConstant(offset), value);
+}
+
 Node* CodeStubAssembler::LoadNativeContext(Node* context) {
   return LoadContextElement(context, Context::NATIVE_CONTEXT_INDEX);
 }
 
 Node* CodeStubAssembler::LoadJSArrayElementsMap(ElementsKind kind,
                                                 Node* native_context) {
   CSA_ASSERT(this, IsNativeContext(native_context));
   return LoadContextElement(native_context, Context::ArrayMapIndex(kind));
 }
 
@@ skipping 6888 matching lines @@
   return Word32NotEqual(is_debug_active, Int32Constant(0));
 }
 
 Node* CodeStubAssembler::IsPromiseHookEnabled() {
   Node* const promise_hook = Load(
       MachineType::Pointer(),
       ExternalConstant(ExternalReference::promise_hook_address(isolate())));
   return WordNotEqual(promise_hook, IntPtrConstant(0));
 }
 
+Node* CodeStubAssembler::AllocateFunctionWithMapAndContext(Node* map,
+                                                           Node* shared_info,
+                                                           Node* context) {
+  Node* const code = BitcastTaggedToWord(
+      LoadObjectField(shared_info, SharedFunctionInfo::kCodeOffset));
+  Node* const code_entry =
+      IntPtrAdd(code, IntPtrConstant(Code::kHeaderSize - kHeapObjectTag));
+
+  Node* const fun = Allocate(JSFunction::kSize);
+  StoreMapNoWriteBarrier(fun, map);
+  StoreObjectFieldRoot(fun, JSObject::kPropertiesOffset,
+                       Heap::kEmptyFixedArrayRootIndex);
+  StoreObjectFieldRoot(fun, JSObject::kElementsOffset,
+                       Heap::kEmptyFixedArrayRootIndex);
+  StoreObjectFieldRoot(fun, JSFunction::kLiteralsOffset,
+                       Heap::kEmptyLiteralsArrayRootIndex);
+  StoreObjectFieldRoot(fun, JSFunction::kPrototypeOrInitialMapOffset,
+                       Heap::kTheHoleValueRootIndex);
+  StoreObjectFieldNoWriteBarrier(fun, JSFunction::kSharedFunctionInfoOffset,
+                                 shared_info);
+  StoreObjectFieldNoWriteBarrier(fun, JSFunction::kContextOffset, context);
+  StoreObjectFieldNoWriteBarrier(fun, JSFunction::kCodeEntryOffset, code_entry,
+                                 MachineType::PointerRepresentation());
+  StoreObjectFieldRoot(fun, JSFunction::kNextFunctionLinkOffset,
+                       Heap::kUndefinedValueRootIndex);
+
+  return fun;
+}
+
 Node* CodeStubAssembler::AllocateJSPromise(Node* context) {
   Node* const native_context = LoadNativeContext(context);
   Node* const promise_fun =
       LoadContextElement(native_context, Context::PROMISE_FUNCTION_INDEX);
   Node* const initial_map =
       LoadObjectField(promise_fun, JSFunction::kPrototypeOrInitialMapOffset);
   Node* const instance = AllocateJSObjectFromMap(initial_map);
 
   return instance;
 }
@@ skipping 27 matching lines @@
                        Heap::kUndefinedValueRootIndex);
   StoreObjectFieldRoot(result, PromiseReactionJobInfo::kDebugNameOffset,
                        Heap::kUndefinedValueRootIndex);
   StoreObjectFieldNoWriteBarrier(result, PromiseReactionJobInfo::kContextOffset,
                                  context);
   return result;
 }
 
 }  // namespace internal
 }  // namespace v8