Hydrogen stubs for array constructors

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index ad418d69cd33e0f061db20ac2347a6cf82e70467..cf0c2322c37753acbc7cd5d92911078ca2fc9822 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -647,4 +647,24 @@ bool ProfileEntryHookStub::SetFunctionEntryHook(FunctionEntryHook entry_hook) {
 }
 
 
+static void InstallDescriptor(Isolate* isolate, HydrogenCodeStub* stub) {
+  int major_key = stub->MajorKey();
+  CodeStubInterfaceDescriptor* descriptor =
+      isolate->code_stub_interface_descriptor(major_key);
+  if (descriptor->register_param_count_ < 0) {
+    stub->InitializeInterfaceDescriptor(isolate, descriptor);
+  }
+}
+
+
+void ArrayConstructorStubBase::InstallDescriptors(Isolate* isolate) {
+  ArrayNoArgumentConstructorStub stub1(GetInitialFastElementsKind());
+  InstallDescriptor(isolate, &stub1);
+  ArraySingleArgumentConstructorStub stub2(GetInitialFastElementsKind());
+  InstallDescriptor(isolate, &stub2);
+  ArrayNArgumentsConstructorStub stub3(GetInitialFastElementsKind());
+  InstallDescriptor(isolate, &stub3);
+}
+
+
 } }  // namespace v8::internal