test/SILGen/protocol-extension-default-arg-existential-objc.swift

// RUN: %target-swift-frontend -emit-sil -verify %s
// REQUIRES: objc_interop

import Foundation

class Foo: NSObject {
  @objc dynamic func bridged(x: String = "foo") {}
}

func invokeMethodsWithDefaultArgs(x: Foo) {
  x.bridged()
}