Hydrogen stubs for array constructors

src/code-stubs.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 629 matching lines @@
   // We don't allow setting a new entry hook over one that's
   // already active, as the hooks won't stack.
   if (entry_hook != 0 && entry_hook_ != 0)
     return false;
 
   entry_hook_ = entry_hook;
   return true;
 }
 
 
+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