// RUN: %target-swift-frontend -emit-ir -disable-llvm-optzns %s | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize -DINT=i%target-ptrsize

import Builtin
import Swift

sil @marker : $(Builtin.Int32) -> ()

class SomeClass {}
sil_vtable SomeClass {}

class SomeSubclass : SomeClass {}
sil_vtable SomeSubclass {}

// This is designed to be loadable, but large enough that we want to
// pass it indirectly.  This triggers a bunch of special handling in
// some of the IRGen preparation passes, too.
struct Big<T: SomeClass> {
  var a: T
  var b: T
  var c: T
  var d: T
  var e: T
  var f: T
  var g: T
  var h: T
}

sil @make_big : $<T: SomeClass> () -> (@owned Big<T>)

// CHECK-LABEL: define{{( protected)?}} swiftcc { i8*, %T14yield_once_big3BigV* } @test_simple
// CHECK-32-SAME:  (i8* noalias dereferenceable([[BUFFER_SIZE:16]]), %swift.type* %C)
// CHECK-64-SAME:  (i8* noalias dereferenceable([[BUFFER_SIZE:32]]), %swift.type* %C)
sil @test_simple : $@yield_once <C: SomeClass> () -> (@yields @owned Big<C>) {
entry:
  //   Allocate space for the return value of make_big.
  // CHECK:         [[TEMP:%.*]] = alloca [[BIG:%T14yield_once_big3BigV]]
  // CHECK-32-SAME: , align 4
  // CHECK-64-SAME: , align 8

  //   Coroutine setup.
  // CHECK-32-NEXT: [[ID:%.*]] = call token @llvm.coro.id.retcon.once(i32 [[BUFFER_SIZE]], i32 [[BUFFER_ALIGN:4]], i8* %0, i8* bitcast (void (i8*, i1)* @"$S14yield_once_big9SomeClassCRbzlIet_TC" to i8*), i8* bitcast (i8* (i32)* @malloc to i8*), i8* bitcast (void (i8*)* @free to i8*))
  // CHECK-64-NEXT: [[ID:%.*]] = call token @llvm.coro.id.retcon.once(i32 [[BUFFER_SIZE]], i32 [[BUFFER_ALIGN:8]], i8* %0, i8* bitcast (void (i8*, i1)* @"$S14yield_once_big9SomeClassCRbzlIet_TC" to i8*), i8* bitcast (i8* (i64)* @malloc to i8*), i8* bitcast (void (i8*)* @free to i8*))
  // CHECK-NEXT:    [[BEGIN:%.*]] = call i8* @llvm.coro.begin(token [[ID]], i8* null)

  //   Create the return temporary.  We could give this a tighter bound.
  // CHECK-NEXT:    [[T0:%.*]] = bitcast [[BIG]]* [[TEMP]] to i8*
  // CHECK-NEXT:    call void @llvm.lifetime.start.p0i8(i64 {{.*}}, i8* [[T0]])

  // CHECK-NEXT:    call swiftcc void @marker(i32 1000)
  %marker = function_ref @marker : $@convention(thin) (Builtin.Int32) -> ()
  %1000 = integer_literal $Builtin.Int32, 1000
  apply %marker(%1000) : $@convention(thin) (Builtin.Int32) -> ()

  // CHECK-NEXT:    call swiftcc void @make_big([[BIG]]* noalias nocapture sret [[TEMP]], %swift.type* %C)
  %make = function_ref @make_big : $@convention(thin) <T: SomeClass> () -> (@owned Big<T>)
  %value = apply %make<C>() : $@convention(thin) <T: SomeClass> () -> (@owned Big<T>)

  //   Suspend.
  // CHECK-NEXT:    [[IS_UNWIND:%.*]] = call i1 (...) @llvm.coro.suspend.retcon.i1([[BIG]]* [[TEMP]])

  // CHECK-NEXT:    br i1 [[IS_UNWIND]]
  yield %value : $Big<C>, resume resume, unwind unwind

resume:
  // CHECK:         call swiftcc void @marker(i32 2000)
  %2000 = integer_literal $Builtin.Int32, 2000
  apply %marker(%2000) : $@convention(thin) (Builtin.Int32) -> ()
  // CHECK-NEXT:    [[T0:%.*]] = bitcast [[BIG]]* [[TEMP]] to i8*
  // CHECK-NEXT:    call void @llvm.lifetime.end.p0i8(i64 {{.*}}, i8* [[T0]])
  // CHECK-NEXT:    br label %coro.end
  %ret = tuple ()
  return %ret : $()

unwind:
  // CHECK:         call swiftcc void @marker(i32 3000)
  %3000 = integer_literal $Builtin.Int32, 3000
  apply %marker(%3000) : $@convention(thin) (Builtin.Int32) -> ()
  // CHECK-NEXT:    [[T0:%.*]] = bitcast [[BIG]]* [[TEMP]] to i8*
  // CHECK-NEXT:    call void @llvm.lifetime.end.p0i8(i64 {{.*}}, i8* [[T0]])
  // CHECK-NEXT:    br label %coro.end
  unwind

  // CHECK:       coro.end:
  // CHECK:         call i1 @llvm.coro.end(i8* [[BEGIN]], i1 false)
  // CHECK-NEXT:    unreachable
}

// CHECK-LABEL:     declare{{( protected)?}} swiftcc void @"$S14yield_once_big9SomeClassCRbzlIet_TC"
// CHECK-SAME:      (i8* noalias dereferenceable([[BUFFER_SIZE]]), i1)

// CHECK-LABEL: define{{( protected)?}} swiftcc void @test_simple_call(i1)
sil @test_simple_call : $(Builtin.Int1) -> () {
entry(%flag : $Builtin.Int1):
  //   Allocate the buffer.
  // CHECK:         [[T0:%.*]] = alloca {{\[}}[[BUFFER_SIZE]] x i8], align [[BUFFER_ALIGN]]
  // CHECK-NEXT:    [[BUFFER:%.*]] = getelementptr inbounds {{\[}}[[BUFFER_SIZE]] x i8], {{\[}}[[BUFFER_SIZE]] x i8]* [[T0]], i32 0, i32 0
  // CHECK-NEXT:    call void @llvm.lifetime.start.p0i8(i64 [[BUFFER_SIZE]], i8* [[BUFFER]])

  // CHECK-NEXT:    [[TMP:%.*]] = call swiftcc %swift.metadata_response @"$S14yield_once_big12SomeSubclassCMa"([[INT]] 0)
  // CHECK-NEXT:    [[SUBCLASS:%.*]] = extractvalue %swift.metadata_response [[TMP]], 0

  //   Prepare the continuation function pointer to block analysis.
  // CHECK-NEXT:    [[T0:%.*]] = call i8* @llvm.coro.prepare.retcon(i8* bitcast ([[ORIG_CORO_T:.*]] @test_simple to i8*))
  // CHECK-NEXT:    [[PREPARE:%.*]] = bitcast i8* [[T0]] to [[ORIG_CORO_T]]
  //   Call the function pointer.
  // CHECK-NEXT:    [[RAMP_RESULT:%.*]] = call swiftcc [[RAMP_RESULT_T:{ i8\*, %T14yield_once_big3BigV\* }]] [[PREPARE]](i8* noalias dereferenceable([[BUFFER_SIZE]]) [[BUFFER]], %swift.type* [[SUBCLASS]])
  // CHECK-NEXT:    [[CONTINUATION:%.*]] = extractvalue [[RAMP_RESULT_T]] [[RAMP_RESULT]], 0
  // CHECK-NEXT:    [[PTR:%.*]] = extractvalue [[RAMP_RESULT_T]] [[RAMP_RESULT]], 1
  %0 = function_ref @test_simple : $@convention(thin) @yield_once <T: SomeClass> () -> (@yields @owned Big<T>)
  (%value, %token) = begin_apply %0<SomeSubclass>() : $@convention(thin) @yield_once <T: SomeClass> () -> (@yields @owned Big<T>)

  //   Load.  This is spurious.
  // CHECK-NEXT:    [[CAST_PTR:%.*]] = bitcast [[BIG]]* [[PTR]] to [[BIGSUB:%T14yield_once_big3BigVyAA12SomeSubclassCG]]*
  // CHECK-NEXT:    [[T0:%.*]] = getelementptr inbounds [[BIGSUB]], [[BIGSUB]]* [[CAST_PTR]], i32 0, i32 0
  // CHECK-NEXT:    [[R0:%.*]] = load %T14yield_once_big12SomeSubclassC*, %T14yield_once_big12SomeSubclassC** [[T0]], align
  // CHECK-NEXT:    [[T0:%.*]] = getelementptr inbounds [[BIGSUB]], [[BIGSUB]]* [[CAST_PTR]], i32 0, i32 1
  // CHECK-NEXT:    [[R1:%.*]] = load %T14yield_once_big12SomeSubclassC*, %T14yield_once_big12SomeSubclassC** [[T0]], align
  // CHECK-NEXT:    [[T0:%.*]] = getelementptr inbounds [[BIGSUB]], [[BIGSUB]]* [[CAST_PTR]], i32 0, i32 2
  // CHECK-NEXT:    [[R2:%.*]] = load %T14yield_once_big12SomeSubclassC*, %T14yield_once_big12SomeSubclassC** [[T0]], align
  // CHECK-NEXT:    [[T0:%.*]] = getelementptr inbounds [[BIGSUB]], [[BIGSUB]]* [[CAST_PTR]], i32 0, i32 3
  // CHECK-NEXT:    [[R3:%.*]] = load %T14yield_once_big12SomeSubclassC*, %T14yield_once_big12SomeSubclassC** [[T0]], align
  // CHECK-NEXT:    [[T0:%.*]] = getelementptr inbounds [[BIGSUB]], [[BIGSUB]]* [[CAST_PTR]], i32 0, i32 4
  // CHECK-NEXT:    [[R4:%.*]] = load %T14yield_once_big12SomeSubclassC*, %T14yield_once_big12SomeSubclassC** [[T0]], align
  // CHECK-NEXT:    [[T0:%.*]] = getelementptr inbounds [[BIGSUB]], [[BIGSUB]]* [[CAST_PTR]], i32 0, i32 5
  // CHECK-NEXT:    [[R5:%.*]] = load %T14yield_once_big12SomeSubclassC*, %T14yield_once_big12SomeSubclassC** [[T0]], align
  // CHECK-NEXT:    [[T0:%.*]] = getelementptr inbounds [[BIGSUB]], [[BIGSUB]]* [[CAST_PTR]], i32 0, i32 6
  // CHECK-NEXT:    [[R6:%.*]] = load %T14yield_once_big12SomeSubclassC*, %T14yield_once_big12SomeSubclassC** [[T0]], align
  // CHECK-NEXT:    [[T0:%.*]] = getelementptr inbounds [[BIGSUB]], [[BIGSUB]]* [[CAST_PTR]], i32 0, i32 7
  // CHECK-NEXT:    [[R7:%.*]] = load %T14yield_once_big12SomeSubclassC*, %T14yield_once_big12SomeSubclassC** [[T0]], align

  //   Branch.
  // CHECK-NEXT:    br i1 %0,
  cond_br %flag, yes, no

yes:
  // CHECK:         [[T0:%.*]] = bitcast i8* [[CONTINUATION]] to void (i8*, i1)*
  // CHECK-NEXT:    call swiftcc void [[T0]](i8* noalias dereferenceable([[BUFFER_SIZE]]) [[BUFFER]], i1 false)
  // CHECK-NEXT:    call void @llvm.lifetime.end.p0i8(i64 [[BUFFER_SIZE]], i8* [[BUFFER]])
  end_apply %token

  // CHECK-NEXT:    br label
  br cont

no:
  // CHECK:         [[T0:%.*]] = bitcast i8* [[CONTINUATION]] to void (i8*, i1)*
  // CHECK-NEXT:    call swiftcc void [[T0]](i8* noalias dereferenceable([[BUFFER_SIZE]]) [[BUFFER]], i1 true)
  // CHECK-NEXT:    call void @llvm.lifetime.end.p0i8(i64 [[BUFFER_SIZE]], i8* [[BUFFER]])
  abort_apply %token

  // CHECK-NEXT:    br label
  br cont

cont:
  // CHECK:         call void bitcast (void (%swift.refcounted*)* @swift_release to void (%T14yield_once_big12SomeSubclassC*)*)(%T14yield_once_big12SomeSubclassC* [[R0]])
  // CHECK-NEXT:    call void bitcast (void (%swift.refcounted*)* @swift_release to void (%T14yield_once_big12SomeSubclassC*)*)(%T14yield_once_big12SomeSubclassC* [[R1]])
  // CHECK-NEXT:    call void bitcast (void (%swift.refcounted*)* @swift_release to void (%T14yield_once_big12SomeSubclassC*)*)(%T14yield_once_big12SomeSubclassC* [[R2]])
  // CHECK-NEXT:    call void bitcast (void (%swift.refcounted*)* @swift_release to void (%T14yield_once_big12SomeSubclassC*)*)(%T14yield_once_big12SomeSubclassC* [[R3]])
  // CHECK:         call void bitcast (void (%swift.refcounted*)* @swift_release to void (%T14yield_once_big12SomeSubclassC*)*)(%T14yield_once_big12SomeSubclassC* [[R4]])
  // CHECK-NEXT:    call void bitcast (void (%swift.refcounted*)* @swift_release to void (%T14yield_once_big12SomeSubclassC*)*)(%T14yield_once_big12SomeSubclassC* [[R5]])
  // CHECK-NEXT:    call void bitcast (void (%swift.refcounted*)* @swift_release to void (%T14yield_once_big12SomeSubclassC*)*)(%T14yield_once_big12SomeSubclassC* [[R6]])
  // CHECK-NEXT:    call void bitcast (void (%swift.refcounted*)* @swift_release to void (%T14yield_once_big12SomeSubclassC*)*)(%T14yield_once_big12SomeSubclassC* [[R7]])
  destroy_value %value : $Big<SomeSubclass>

  // CHECK-NEXT:    ret void
  %ret = tuple ()
  return %ret : $()
}