[compiler] Sidestep optimizing of generator resumers.

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/code-stubs.h"
 #include "src/extensions/externalize-string-extension.h"
@@ skipping 2751 matching lines @@
     JSFunction::EnsureHasInitialMap(function);
     function->initial_map()->set_instance_type(JS_PROMISE_TYPE);
     function->shared()->set_construct_stub(
         *isolate()->builtins()->JSBuiltinsConstructStub());
     InstallWithIntrinsicDefaultProto(isolate(), function,
                                      Context::PROMISE_FUNCTION_INDEX);
   }
 
   InstallBuiltinFunctionIds();
 
+  // Also install builtin function ids to some generator object methods. These
+  // three methods use the three resume operations (Runtime_GeneratorNext,
+  // Runtime_GeneratorReturn, Runtime_GeneratorThrow) respectively. Those
+  // operations are not supported by Crankshaft, TurboFan, nor Ignition.
+  {
+    Handle<JSObject> generator_object_prototype(JSObject::cast(
+        native_context()->generator_object_prototype_map()->prototype()));
+
+    {  // GeneratorObject.prototype.next
+      Handle<String> key = factory()->next_string();
+      Handle<JSFunction> function = Handle<JSFunction>::cast(
+          JSReceiver::GetProperty(generator_object_prototype, key)
+              .ToHandleChecked());
+      function->shared()->set_builtin_function_id(kGeneratorObjectNext);
+    }
+    {  // GeneratorObject.prototype.return
+      Handle<String> key = factory()->NewStringFromAsciiChecked("return");
+      Handle<JSFunction> function = Handle<JSFunction>::cast(
+          JSReceiver::GetProperty(generator_object_prototype, key)
+              .ToHandleChecked());
+      function->shared()->set_builtin_function_id(kGeneratorObjectReturn);
+    }
+    {  // GeneratorObject.prototype.throw
+      Handle<String> key = factory()->throw_string();
+      Handle<JSFunction> function = Handle<JSFunction>::cast(
+          JSReceiver::GetProperty(generator_object_prototype, key)
+              .ToHandleChecked());
+      function->shared()->set_builtin_function_id(kGeneratorObjectThrow);
+    }
+  }
+
   // Create a map for accessor property descriptors (a variant of JSObject
   // that predefines four properties get, set, configurable and enumerable).
   {
     // AccessorPropertyDescriptor initial map.
     Handle<Map> map =
         factory()->NewMap(JS_OBJECT_TYPE, JSAccessorPropertyDescriptor::kSize);
     // Create the descriptor array for the property descriptor object.
     Map::EnsureDescriptorSlack(map, 4);
 
     {  // get
@@ skipping 872 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8