[csa] Refactor promises API

src/code-stub-assembler.cc

Index: src/code-stub-assembler.cc
diff --git a/src/code-stub-assembler.cc b/src/code-stub-assembler.cc
index 7532319bf2a8dc16f9f491b35933df73cbc6b2a6..aa932fbcb979a639eb2df5d3dc5e8167000d55de 100644
--- a/src/code-stub-assembler.cc
+++ b/src/code-stub-assembler.cc
@@ -8315,27 +8315,43 @@ Node* CodeStubAssembler::AllocateFunctionWithMapAndContext(Node* map,
   return fun;
 }
 
-Node* CodeStubAssembler::AllocateJSPromise(Node* context) {
+Node* CodeStubAssembler::AllocateAndInitJSPromise(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);
+  Node* const promise = AllocateJSObjectFromMap(initial_map);
+  StoreObjectFieldNoWriteBarrier(promise, JSPromise::kStatusOffset,
+                                 SmiConstant(v8::Promise::kPending));
+  StoreObjectFieldNoWriteBarrier(promise, JSPromise::kFlagsOffset,
+                                 SmiConstant(0));
 
-  return instance;
+  return promise;
 }
 
-void CodeStubAssembler::PromiseInit(Node* promise) {
-  StoreObjectField(promise, JSPromise::kStatusOffset,
-                   SmiConstant(v8::Promise::kPending));
-  StoreObjectField(promise, JSPromise::kFlagsOffset, SmiConstant(0));
-}
+Node* CodeStubAssembler::AllocateAndSetJSPromise(Node* context, Node* status,
+                                                 Node* result) {
+  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 promise = AllocateJSObjectFromMap(initial_map);
 
-void CodeStubAssembler::PromiseSet(Node* promise, Node* status, Node* result) {
   CSA_ASSERT(this, TaggedIsSmi(status));
-  StoreObjectField(promise, JSPromise::kStatusOffset, status);
-  StoreObjectField(promise, JSPromise::kResultOffset, result);
+
+  StoreObjectFieldNoWriteBarrier(promise, JSPromise::kStatusOffset, status);
+  StoreObjectFieldNoWriteBarrier(promise, JSPromise::kResultOffset, result);
+  StoreObjectFieldNoWriteBarrier(promise, JSPromise::kFlagsOffset,
+                                 SmiConstant(0));
+
+  return promise;
+}
+
+void CodeStubAssembler::JSPromiseInit(Node* promise) {
+  StoreObjectField(promise, JSPromise::kStatusOffset,
+                   SmiConstant(v8::Promise::kPending));
   StoreObjectField(promise, JSPromise::kFlagsOffset, SmiConstant(0));
 }