Implement subclassing Arrays.

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index eabb22690ab7843ce198eb23a805ff384b1ccea1..ef724f3431a9a0d1b80d089f72df0ec2d0c9c926 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -4614,8 +4614,30 @@ void ArrayConstructorStub::Generate(MacroAssembler* masm) {
   __ bind(&no_info);
   GenerateDispatchToArrayStub(masm, DISABLE_ALLOCATION_SITES);
 
+  // Subclassing
   __ bind(&subclassing);
-  __ TailCallRuntime(Runtime::kThrowArrayNotSubclassableError, 0, 1);
+  __ Pop(rcx);  // return address.
+  __ Push(rdi);
+  __ Push(rdx);
+
+  // Adjust argc.
+  switch (argument_count()) {
+    case ANY:
+    case MORE_THAN_ONE:
+      __ addp(rax, Immediate(2));
+      break;
+    case NONE:
+      __ movp(rax, Immediate(2));
+      break;
+    case ONE:
+      __ movp(rax, Immediate(3));
+      break;
+  }
+
+  __ Push(rcx);
+  __ JumpToExternalReference(
+      ExternalReference(Runtime::kArrayConstructorWithSubclassing, isolate()),
+      1);
 }