// RUN: %target-swift-emit-silgen -target %target-swift-5.8-abi-triple -module-name Test -parse-as-library %s -verify -unavailable-decl-optimization=stub | %FileCheck %s --check-prefixes=CHECK,CHECK-SWIFT5_8
// RUN: %target-swift-emit-silgen -target %target-swift-5.9-abi-triple -module-name Test -parse-as-library %s -verify -unavailable-decl-optimization=stub | %FileCheck %s --check-prefixes=CHECK,CHECK-SWIFT5_9

// REQUIRES: OS=macosx || OS=ios || OS=tvos || OS=watchos

// CHECK-LABEL:     sil{{.*}}@$s4Test15unavailableFuncyyF
// CHECK-SWIFT5_8:    [[FNREF:%.*]] = function_ref @$ss31_diagnoseUnavailableCodeReacheds5NeverOyFTwb : $@convention(thin) () -> Never
// CHECK-SWIFT5_9:    [[FNREF:%.*]] = function_ref @$ss31_diagnoseUnavailableCodeReacheds5NeverOyF : $@convention(thin) () -> Never
// CHECK-NEXT:        [[APPLY:%.*]] = apply [[FNREF]]()
// CHECK:           } // end sil function '$s4Test15unavailableFuncyyF'
@available(*, unavailable)
public func unavailableFunc() {}

// CHECK-LABEL:     sil{{.*}}@$s4Test24unavailableInlinableFuncyyF
// CHECK-SWIFT5_8:    [[FNREF:%.*]] = function_ref @$ss31_diagnoseUnavailableCodeReacheds5NeverOyFTwb : $@convention(thin) () -> Never
// CHECK-SWIFT5_9:    [[FNREF:%.*]] = function_ref @$ss31_diagnoseUnavailableCodeReacheds5NeverOyFTwb : $@convention(thin) () -> Never
// CHECK-NEXT:        [[APPLY:%.*]] = apply [[FNREF]]()
// CHECK:           } // end sil function '$s4Test24unavailableInlinableFuncyyF'
@available(*, unavailable)
@inlinable public func unavailableInlinableFunc() {}

// CHECK-LABEL:     sil{{.*}}@$s4Test27unavailableOnOSPlatformFuncyyF
// CHECK-SWIFT5_8:    [[FNREF:%.*]] = function_ref @$ss31_diagnoseUnavailableCodeReacheds5NeverOyFTwb : $@convention(thin) () -> Never
// CHECK-SWIFT5_9:    [[FNREF:%.*]] = function_ref @$ss31_diagnoseUnavailableCodeReacheds5NeverOyF : $@convention(thin) () -> Never
// CHECK-NEXT:        [[APPLY:%.*]] = apply [[FNREF]]()
// CHECK:           } // end sil function '$s4Test27unavailableOnOSPlatformFuncyyF'
@available(macOS, unavailable)
@available(iOS, unavailable)
@available(tvOS, unavailable)
@available(watchOS, unavailable)
public func unavailableOnOSPlatformFunc() {}