[promises] Move various promise reject functions to TF

src/builtins/builtins-promise.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/builtins/builtins-promise.h"
 #include "src/builtins/builtins-constructor.h"
 #include "src/builtins/builtins-utils.h"
 #include "src/builtins/builtins.h"
 #include "src/code-factory.h"
 #include "src/code-stub-assembler.h"
@@ skipping 835 matching lines @@
                          Heap::kUndefinedValueRootIndex);
     StoreObjectFieldRoot(promise, JSPromise::kFulfillReactionsOffset,
                          Heap::kUndefinedValueRootIndex);
     StoreObjectFieldRoot(promise, JSPromise::kRejectReactionsOffset,
                          Heap::kUndefinedValueRootIndex);
   }
 }
 
 // ES#sec-promise-reject-functions
 // Promise Reject Functions
-BUILTIN(PromiseRejectClosure) {
-  HandleScope scope(isolate);
+TF_BUILTIN(PromiseRejectClosure, PromiseBuiltinsAssembler) {
+  Node* const value = Parameter(1);
+  Node* const context = Parameter(4);
 
-  Handle<Context> context(isolate->context(), isolate);
+  Label out(this);
 
-  if (PromiseUtils::HasAlreadyVisited(context)) {
-    return isolate->heap()->undefined_value();
-  }
+  // 3. Let alreadyResolved be F.[[AlreadyResolved]].
+  Node* const has_already_visited_slot =
+      IntPtrConstant(PromiseUtils::kAlreadyVisitedSlot);
 
-  PromiseUtils::SetAlreadyVisited(context);
-  Handle<Object> value = args.atOrUndefined(isolate, 1);
-  Handle<JSObject> promise = handle(PromiseUtils::GetPromise(context), isolate);
-  Handle<Object> debug_event =
-      handle(PromiseUtils::GetDebugEvent(context), isolate);
-  MaybeHandle<Object> maybe_result;
-  Handle<Object> argv[] = {promise, value, debug_event};
-  RETURN_FAILURE_ON_EXCEPTION(
-      isolate, Execution::Call(isolate, isolate->promise_internal_reject(),
-                               isolate->factory()->undefined_value(),
-                               arraysize(argv), argv));
-  return isolate->heap()->undefined_value();
+  Node* const has_already_visited =
+      LoadFixedArrayElement(context, has_already_visited_slot);

[Igor Sheludko, 2017/01/06 17:26:25]

LoadContextElement

[gsathya, 2017/01/06 19:20:49]

Done.

+
+  // 4. If alreadyResolved.[[Value]] is true, return undefined.
+  GotoIf(SmiEqual(has_already_visited, SmiConstant(1)), &out);

[Igor Sheludko, 2017/01/06 17:26:25]

Nit: this should be 
  GotoUnless(SmiEqual(..., SmiConstant(0))
to match the PromiseUtils::HasAlreadyVisited() implementation.

[gsathya, 2017/01/06 19:20:49]

Leaving as such to match PromiseResolveClosure implementation.

+
+  // 5.Set alreadyResolved.[[Value]] to true.
+  StoreFixedArrayElement(context, has_already_visited_slot, SmiConstant(1));

[Igor Sheludko, 2017/01/06 17:26:25]

StoreContextElementNoWriteBarrier

[gsathya, 2017/01/06 19:20:49]

Done.

+
+  // 2. Let promise be F.[[Promise]].
+  Node* const promise = LoadFixedArrayElement(

[Igor Sheludko, 2017/01/06 17:26:25]

LoadContextElement

[gsathya, 2017/01/06 19:20:49]

Done.

+      context, IntPtrConstant(PromiseUtils::kPromiseSlot));
+  Node* const debug_event = LoadFixedArrayElement(

[Igor Sheludko, 2017/01/06 17:26:25]

Same here.

[gsathya, 2017/01/06 19:20:49]

Done.

+      context, IntPtrConstant(PromiseUtils::kDebugEventSlot));
+
+  CallRuntime(Runtime::kPromiseReject, context, promise, value, debug_event);
+  Return(UndefinedConstant());
+
+  Bind(&out);
+  Return(UndefinedConstant());
 }
 
 TF_BUILTIN(PromiseConstructor, PromiseBuiltinsAssembler) {
   Node* const executor = Parameter(1);
   Node* const new_target = Parameter(2);
   Node* const context = Parameter(4);
   Isolate* isolate = this->isolate();
 
   Label if_targetisundefined(this, Label::kDeferred);
 
@@ skipping 98 matching lines @@
     Return(UndefinedConstant());  // Never reached.
   }
 }
 
 TF_BUILTIN(PromiseInternalConstructor, PromiseBuiltinsAssembler) {
   Node* const parent = Parameter(1);
   Node* const context = Parameter(4);
   Return(AllocateAndInitJSPromise(context, parent));
 }
 
-TF_BUILTIN(PromiseCreateAndSet, PromiseBuiltinsAssembler) {
-  Node* const status = Parameter(1);
-  Node* const result = Parameter(2);
-  Node* const context = Parameter(5);
-
-  Node* const instance = AllocateAndSetJSPromise(context, status, result);
-  Return(instance);
-}
-
 TF_BUILTIN(IsPromise, PromiseBuiltinsAssembler) {
   Node* const maybe_promise = Parameter(1);
   Label if_notpromise(this, Label::kDeferred);
 
   GotoIf(TaggedIsSmi(maybe_promise), &if_notpromise);
 
   Node* const result =
       SelectBooleanConstant(HasInstanceType(maybe_promise, JS_PROMISE_TYPE));
   Return(result);
 
@@ skipping 336 matching lines @@
 TF_BUILTIN(NewPromiseCapability, PromiseBuiltinsAssembler) {
   Node* constructor = Parameter(1);
   Node* debug_event = Parameter(2);
   Node* context = Parameter(5);
 
   CSA_ASSERT_JS_ARGC_EQ(this, 2);
 
   Return(NewPromiseCapability(context, constructor, debug_event));
 }
 
+TF_BUILTIN(PromiseReject, PromiseBuiltinsAssembler) {
+  // 1. Let C be the this value.
+  Node* const receiver = Parameter(0);
+  Node* const reason = Parameter(1);
+  Node* const context = Parameter(4);
+
+  // 2. If Type(C) is not Object, throw a TypeError exception.
+  ThrowIfNotJSReceiver(context, receiver, MessageTemplate::kCalledOnNonObject,
+                       "PromiseReject");
+
+  Label if_nativepromise(this), if_custompromise(this, Label::kDeferred);
+  Node* const native_context = LoadNativeContext(context);
+  Node* const promise_fun =
+      LoadContextElement(native_context, Context::PROMISE_FUNCTION_INDEX);
+  Branch(WordEqual(promise_fun, receiver), &if_nativepromise,
+         &if_custompromise);
+
+  Bind(&if_nativepromise);
+  {
+    Node* const promise = AllocateAndSetJSPromise(
+        context, SmiConstant(v8::Promise::kRejected), reason);
+    CallRuntime(Runtime::kPromiseRejectEventFromStack, context, promise,
+                reason);
+    Return(promise);
+  }
+
+  Bind(&if_custompromise);
+  {
+    // 3. Let promiseCapability be ? NewPromiseCapability(C).
+    Node* const capability = NewPromiseCapability(context, receiver);
+
+    // 4. Perform ? Call(promiseCapability.[[Reject]], undefined, « r »).
+    Node* const reject =
+        LoadObjectField(capability, JSPromiseCapability::kRejectOffset);
+    Callable call_callable = CodeFactory::Call(isolate());
+    CallJS(call_callable, context, reject, UndefinedConstant(), reason);
+
+    // 5. Return promiseCapability.[[Promise]].
+    Node* const promise =
+        LoadObjectField(capability, JSPromiseCapability::kPromiseOffset);
+    Return(promise);
+  }
+}
+
 }  // namespace internal
 }  // namespace v8