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// RUN: %target-swift-emit-sil -parse-as-library -module-name back_deploy %s -target %target-cpu-apple-macosx10.50 -verify
// RUN: %target-swift-emit-silgen -parse-as-library -module-name back_deploy %s | %FileCheck %s
// RUN: %target-swift-emit-silgen -parse-as-library -module-name back_deploy %s -target %target-cpu-apple-macosx10.50 | %FileCheck %s
// REQUIRES: OS=macosx
// REQUIRES: concurrency
@available(macOS 51.0, *)
@usableFromInline func otherFunc() async {}
// -- Fallback definition of asyncFunc()
// CHECK: sil non_abi [serialized] [ossa] @$s11back_deploy9asyncFuncyyYaFTwB : $@convention(thin) @async () -> ()
// CHECK: bb0:
// CHECK: [[FNREF:%.*]] = function_ref @$s11back_deploy9otherFuncyyYaF : $@convention(thin) @async () -> ()
// CHECK: [[APPLY:%.*]] = apply [[FNREF]]() : $@convention(thin) @async () -> ()
// CHECK: [[RESULT:%.*]] = tuple ()
// CHECK: return [[RESULT]] : $()
// -- Back deployment thunk for trivialFunc()
// CHECK-LABEL: sil non_abi [serialized] [thunk] [ossa] @$s11back_deploy9asyncFuncyyYaFTwb : $@convention(thin) @async () -> ()
// CHECK: bb0:
// CHECK: [[MAJOR:%.*]] = integer_literal $Builtin.Word, 52
// CHECK: [[MINOR:%.*]] = integer_literal $Builtin.Word, 1
// CHECK: [[PATCH:%.*]] = integer_literal $Builtin.Word, 0
// CHECK: [[OSVFN:%.*]] = function_ref @$ss26_stdlib_isOSVersionAtLeastyBi1_Bw_BwBwtF : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK: [[AVAIL:%.*]] = apply [[OSVFN]]([[MAJOR]], [[MINOR]], [[PATCH]]) : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK: cond_br [[AVAIL]], [[AVAIL_BB:bb[0-9]+]], [[UNAVAIL_BB:bb[0-9]+]]
//
// CHECK: [[UNAVAIL_BB]]:
// CHECK: [[FALLBACKFN:%.*]] = function_ref @$s11back_deploy9asyncFuncyyYaFTwB : $@convention(thin) @async () -> ()
// CHECK: {{%.*}} = apply [[FALLBACKFN]]() : $@convention(thin) @async () -> ()
// CHECK: br [[RETURN_BB:bb[0-9]+]]
//
// CHECK: [[AVAIL_BB]]:
// CHECK: [[ORIGFN:%.*]] = function_ref @$s11back_deploy9asyncFuncyyYaF : $@convention(thin) @async () -> ()
// CHECK: {{%.*}} = apply [[ORIGFN]]() : $@convention(thin) @async () -> ()
// CHECK: br [[RETURN_BB]]
//
// CHECK: [[RETURN_BB]]
// CHECK: [[RESULT:%.*]] = tuple ()
// CHECK: return [[RESULT]] : $()
// -- Original definition of trivialFunc()
// CHECK-LABEL: sil [available 52.1] [ossa] @$s11back_deploy9asyncFuncyyYaF : $@convention(thin) @async () -> ()
@available(macOS 51.0, *)
@backDeployed(before: macOS 52.1)
public func asyncFunc() async {
await otherFunc()
}
// CHECK-LABEL: sil hidden [available 51.0] [ossa] @$s11back_deploy6calleryyYaF : $@convention(thin) @async () -> ()
@available(macOS 51.0, *)
func caller() async {
// -- Verify the thunk is called
// CHECK: {{%.*}} = function_ref @$s11back_deploy9asyncFuncyyYaFTwb : $@convention(thin) @async () -> ()
await asyncFunc()
}
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