Adding ElementsAccessor::Concat

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/utils/random-number-generator.h"
 #include "src/code-stubs.h"
@@ skipping 2313 matching lines @@
                         Builtins::kDateToPrimitive,
                         static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));
 
     // Set the expected parameters for @@toPrimitive to 1; required by builtin.
     to_primitive->shared()->set_internal_formal_parameter_count(1);
 
     // Set the length for the function to satisfy ECMA-262.
     to_primitive->shared()->set_length(1);
   }
 
+  // Install Array.prototype.concat
+  {
+    Handle<JSFunction> array_constructor(native_context()->array_function());
+    Handle<JSObject> proto(JSObject::cast(array_constructor->prototype()));
+    Handle<JSFunction> concat =
+        InstallFunction(proto, "concat", JS_OBJECT_TYPE, JSObject::kHeaderSize,
+                        MaybeHandle<JSObject>(), Builtins::kArrayConcat);
+
+    // Make sure that Array.prototype.concat appears to be compiled.
+    // The code will never be called, but inline caching for call will
+    // only work if it appears to be compiled.
+    concat->shared()->DontAdaptArguments();
+    DCHECK(concat->is_compiled());
+    // Set the lengths for the functions to satisfy ECMA-262.
+    concat->shared()->set_length(1);
+  }
+
+  // Install InternalArray.prototype.concat
+  {
+    Handle<JSFunction> array_constructor(
+        native_context()->internal_array_function());
+    Handle<JSObject> proto(JSObject::cast(array_constructor->prototype()));
+    Handle<JSFunction> concat =
+        InstallFunction(proto, "concat", JS_OBJECT_TYPE, JSObject::kHeaderSize,
+                        MaybeHandle<JSObject>(), Builtins::kArrayConcat);
+
+    // Make sure that InternalArray.prototype.concat appears to be compiled.
+    // The code will never be called, but inline caching for call will
+    // only work if it appears to be compiled.
+    concat->shared()->DontAdaptArguments();
+    DCHECK(concat->is_compiled());
+    // Set the lengths for the functions to satisfy ECMA-262.
+    concat->shared()->set_length(1);
+  }
   // Install Function.prototype.call and apply.
   {
     Handle<String> key = factory()->Function_string();
     Handle<JSFunction> function =
         Handle<JSFunction>::cast(Object::GetProperty(
             handle(native_context()->global_object()), key).ToHandleChecked());
     Handle<JSObject> proto =
         Handle<JSObject>(JSObject::cast(function->instance_prototype()));
 
     // Install the call and the apply functions.
@@ skipping 847 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8