[promises] Port ResolvePromise to TF

src/bootstrapper.cc

 // Copyright 2014 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/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/ieee754.h"
 #include "src/code-stubs.h"
@@ skipping 1798 matching lines @@
 
     // Install the "constructor" property on the {prototype}.
     JSObject::AddProperty(prototype, factory->constructor_string(), promise_fun,
                           DONT_ENUM);
 
     // Install the @@toStringTag property on the {prototype}.
     JSObject::AddProperty(
         prototype, factory->to_string_tag_symbol(), factory->Promise_string(),
         static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));
 
-    SimpleInstallFunction(prototype, "then", Builtins::kPromiseThen, 2, true,
+    Handle<JSFunction> promise_then =
+        SimpleCreateFunction(isolate, isolate->factory()->then_string(),
+                             Builtins::kPromiseThen, 2, true);
+    JSObject::AddProperty(prototype, isolate->factory()->then_string(),
+                          promise_then, DONT_ENUM);
+    InstallWithIntrinsicDefaultProto(isolate, promise_then,
+                                     Context::PROMISE_THEN_INDEX);
+
+    // TODO(gsathya): Move to TF
+    SimpleInstallFunction(prototype, "catch", Builtins::kIllegal, 1, true,
                           DONT_ENUM);
 
+    Handle<Map> prototype_map(prototype->map());
+    Map::SetShouldBeFastPrototypeMap(prototype_map, true, isolate);
+
+    // Store the initial Promise.prototype map. This is used in fast-path
+    // checks. Do not alter the prototype after this point.
+    native_context()->set_promise_prototype_map(*prototype_map);
+
     {  // Internal: PromiseInternalConstructor
       Handle<JSFunction> function =
           SimpleCreateFunction(isolate, factory->empty_string(),
                                Builtins::kPromiseInternalConstructor, 0, false);
       InstallWithIntrinsicDefaultProto(
           isolate, function, Context::PROMISE_INTERNAL_CONSTRUCTOR_INDEX);
     }
 
     {  // Internal: PromiseCreateAndSet
       Handle<JSFunction> function =
@@ skipping 11 matching lines @@
     }
 
     {  // Internal: PerformPromiseThen
       Handle<JSFunction> function =
           SimpleCreateFunction(isolate, factory->empty_string(),
                                Builtins::kPerformPromiseThen, 4, false);
       InstallWithIntrinsicDefaultProto(isolate, function,
                                        Context::PERFORM_PROMISE_THEN_INDEX);
     }
 
+    {  // Internal: ResolvePromise
+      Handle<JSFunction> function =
+          SimpleCreateFunction(isolate, factory->empty_string(),
+                               Builtins::kResolvePromise, 2, false);
+      InstallWithIntrinsicDefaultProto(isolate, function,
+                                       Context::RESOLVE_PROMISE_INDEX);
+    }
+
     {
       Handle<Code> code =
           handle(isolate->builtins()->builtin(Builtins::kPromiseResolveClosure),
                  isolate);
       Handle<SharedFunctionInfo> info =
           factory->NewSharedFunctionInfo(factory->empty_string(), code, false);
       info->set_internal_formal_parameter_count(1);
       info->set_length(1);
       native_context()->set_promise_resolve_shared_fun(*info);
 
@@ skipping 2735 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8