// RUN: %target-swift-frontend -disable-sil-perf-optzns -O -Xllvm -swiftmergefunc-threshold=0 -emit-ir %s | %FileCheck %s

// Check that IRGen lowers non-atomic reference counting instructions to
// proper runtime calls.
// Check that LLVM passes combine multiple retains/releases into
// retain_n/release_n and invoke a proper runtime function. Non-atomic runtime
// functions should be called only if all combined reference-counting
// instructions are non-atomic.
//
// Take into account that on Linux unknown_retain/unknown_release are not supported
// and native retain/release runtime functions are used instead.

sil_stage canonical

import Builtin
import Swift
import SwiftShims

public class C {
  deinit
  init()
}

public protocol P : class {
}

// foo(C) -> C
sil [noinline] @_TF28nonatomic_reference_counting3fooFCS_1CS0_ : $@convention(thin) (@owned C) -> @owned C {
bb0(%0 : $C):
  return %0 : $C
}

sil @doSomething : $@convention(thin) () -> ()

// CHECK-LABEL: define {{.*}}@test_strong_nonatomic_rr
// CHECK: call {{.*}}@swift_nonatomic_retain
// CHECK: call {{.*}}@swift_nonatomic_release
// CHECK: ret
sil @test_strong_nonatomic_rr: $@convention(thin) () -> @owned C {
bb0:
  %1 = alloc_ref $C
  strong_retain [nonatomic] %1 : $C
  %f = function_ref @doSomething : $@convention(thin) () -> ()
  %r = apply %f () : $@convention(thin) () -> ()
  strong_release [nonatomic] %1 : $C
  return %1 : $C
}

// CHECK-LABEL: define {{.*}}@test_unknown_nonatomic_rr
// CHECK: call {{.*}}@{{(swift_nonatomic_unknownObjectRetain|swift_nonatomic_retain)}}
// CHECK: call {{.*}}@{{(swift_nonatomic_unknownObjectRelease|swift_nonatomic_release)}}
// CHECK: ret
sil @test_unknown_nonatomic_rr: $@convention(thin) <T where T : P> (@owned T) -> () {
bb0(%0 : $T):
  strong_retain [nonatomic] %0 : $T
  %f = function_ref @doSomething : $@convention(thin) () -> ()
  %r = apply %f () : $@convention(thin) () -> ()
  strong_release [nonatomic] %0 : $T
  %9 = tuple ()
  return %9 : $()
}

// CHECK-LABEL: define {{.*}}@test_strong_nonatomic_rr_n
// CHECK: call {{.*}}@swift_nonatomic_retain_n
// CHECK: call {{.*}}@swift_nonatomic_release_n
// CHECK: ret
sil @test_strong_nonatomic_rr_n: $@convention(thin) () -> @owned C {
bb0:
  %1 = alloc_ref $C
  strong_retain [nonatomic] %1 : $C
  strong_retain [nonatomic] %1 : $C
  %f = function_ref @doSomething : $@convention(thin) () -> ()
  %r = apply %f () : $@convention(thin) () -> ()
  strong_release [nonatomic] %1 : $C
  strong_release [nonatomic] %1 : $C
  return %1 : $C
}

// CHECK-LABEL: define {{.*}}@test_strong_mixed_rr_n
// CHECK: call {{.*}}@swift_retain_n
// CHECK: call {{.*}}@swift_release_n
// CHECK: ret
sil @test_strong_mixed_rr_n: $@convention(thin) () -> @owned C {
bb0:
  %1 = alloc_ref $C
  strong_retain [nonatomic] %1 : $C
  strong_retain %1 : $C
  %f = function_ref @doSomething : $@convention(thin) () -> ()
  %r = apply %f () : $@convention(thin) () -> ()
  strong_release %1 : $C
  strong_release [nonatomic] %1 : $C
  return %1 : $C
}

// CHECK-LABEL: define {{.*}}@test_unknown_nonatomic_rr_n
// CHECK: call {{.*}}@{{(swift_nonatomic_unknownObjectRetain_n|swift_nonatomic_retain_n)}}
// CHECK: call {{.*}}@{{(swift_nonatomic_unknownObjectRelease_n|swift_nonatomic_release_n)}}
// CHECK: ret
sil @test_unknown_nonatomic_rr_n: $@convention(thin) <T where T : P> (@owned T) -> () {
bb0(%0 : $T):
  strong_retain [nonatomic] %0 : $T
  strong_retain [nonatomic] %0 : $T
  %f = function_ref @doSomething : $@convention(thin) () -> ()
  %r = apply %f () : $@convention(thin) () -> ()
  strong_release [nonatomic] %0 : $T
  strong_release [nonatomic] %0 : $T
  %9 = tuple ()
  return %9 : $()
}

// CHECK-LABEL: define {{.*}}@test_unknown_mixed_rr_n
// CHECK: call {{.*}}@{{(swift_unknownObjectRetain_n|swift_retain_n)}}
// CHECK: call {{.*}}@{{(swift_unknownObjectRelease_n|swift_release_n)}}
// CHECK: ret
sil @test_unknown_mixed_rr_n: $@convention(thin) <T where T : P> (@owned T) -> () {
bb0(%0 : $T):
  strong_retain [nonatomic] %0 : $T
  strong_retain %0 : $T
  %f = function_ref @doSomething : $@convention(thin) () -> ()
  %r = apply %f () : $@convention(thin) () -> ()
  strong_release %0 : $T
  strong_release [nonatomic] %0 : $T
  %9 = tuple ()
  return %9 : $()
}

sil @test_unowned_nonatomic_rr: $@convention(thin) () -> () {
bb0:
  %0 = alloc_ref $C
  %1 = ref_to_unowned %0 : $C to $@sil_unowned C
  unowned_retain [nonatomic] %1 : $@sil_unowned C
  %f = function_ref @doSomething : $@convention(thin) () -> ()
  %r = apply %f () : $@convention(thin) () -> ()
  unowned_release [nonatomic] %1 : $@sil_unowned C
  %3 = tuple ()
  return %3 : $()
}

// CHECK-LABEL: define {{.*}}@test_bridged_nonatomic_rr
// CHECK: call {{.*}}@swift_nonatomic_bridgeObjectRetain
// CHECK: call {{.*}}@swift_nonatomic_bridgeObjectRelease
// CHECK: ret
sil @test_bridged_nonatomic_rr: $@convention(thin) () -> () {
bb0:
  %0 = alloc_ref $C
  %1 = integer_literal $Builtin.Word, 0
  %2 = ref_to_bridge_object %0 : $C, %1 : $Builtin.Word
  strong_retain [nonatomic] %2 : $Builtin.BridgeObject
  %f = function_ref @doSomething : $@convention(thin) () -> ()
  %r = apply %f () : $@convention(thin) () -> ()
  strong_release [nonatomic] %2 : $Builtin.BridgeObject
  %3 = tuple ()
  return %3 : $()
}

// CHECK-LABEL: define {{.*}}@test_bridged_nonatomic_rr_n
// CHECK: call {{.*}}@swift_nonatomic_bridgeObjectRetain_n
// CHECK: call {{.*}}@swift_nonatomic_bridgeObjectRelease_n
// CHECK: ret
sil @test_bridged_nonatomic_rr_n: $@convention(thin) () -> () {
bb0:
  %0 = alloc_ref $C
  %1 = integer_literal $Builtin.Word, 0
  %2 = ref_to_bridge_object %0 : $C, %1 : $Builtin.Word
  strong_retain [nonatomic] %2 : $Builtin.BridgeObject
  strong_retain [nonatomic] %2 : $Builtin.BridgeObject
  %f = function_ref @doSomething : $@convention(thin) () -> ()
  %r = apply %f () : $@convention(thin) () -> ()
  //%f = function_ref @_TF28nonatomic_reference_counting3fooFCS_1CS0_ : $@convention(thin) (@owned C) -> @owned C
  //%r = apply %f (%0) : $@convention(thin) (@owned C) -> @owned C
  strong_release [nonatomic] %2 : $Builtin.BridgeObject
  strong_release [nonatomic] %2 : $Builtin.BridgeObject
  %3 = tuple ()
  return %3 : $()
}

// CHECK-LABEL: define {{.*}}@test_bridged_mixed_rr_n
// CHECK: call {{.*}}@swift_bridgeObjectRetain_n
// CHECK: call {{.*}}@swift_bridgeObjectRelease_n
// CHECK: ret
sil @test_bridged_mixed_rr_n: $@convention(thin) () -> () {
bb0:
  %0 = alloc_ref $C
  %1 = integer_literal $Builtin.Word, 0
  %2 = ref_to_bridge_object %0 : $C, %1 : $Builtin.Word
  strong_retain [nonatomic] %2 : $Builtin.BridgeObject
  strong_retain %2 : $Builtin.BridgeObject
  %f = function_ref @doSomething : $@convention(thin) () -> ()
  %r = apply %f () : $@convention(thin) () -> ()
  //%f = function_ref @_TF28nonatomic_reference_counting3fooFCS_1CS0_ : $@convention(thin) (@owned C) -> @owned C
  //%r = apply %f (%0) : $@convention(thin) (@owned C) -> @owned C
  strong_release %2 : $Builtin.BridgeObject
  strong_release [nonatomic] %2 : $Builtin.BridgeObject
  %3 = tuple ()
  return %3 : $()
}

// C.__deallocating_deinit
sil @_TFC28nonatomic_reference_counting1CD : $@convention(method) (@owned C) -> () {
bb0(%0 : $C):
  dealloc_ref %0 : $C
  %4 = tuple ()
  return %4 : $()
}

sil_vtable C {
  #C.deinit!deallocator: @_TFC28nonatomic_reference_counting1CD  // C.__deallocating_deinit
}