// RUN: %target-swift-frontend %s -emit-ir -disable-objc-interop | %FileCheck %s --check-prefix=CHECK --check-prefix=COMPAT
// RUN: %target-swift-frontend %s -emit-ir -disable-objc-interop -target x86_64-apple-macosx10.15 | %FileCheck %s --check-prefix=CHECK --check-prefix=NONCOMPAT


// REQUIRES: objc_interop

// The arm64e test is in ptrauth-dynamic_replaceable.sil.
// UNSUPPORTED: CPU=arm64e

// CHECK: @test_dynamically_replaceableTX = global %swift.dyn_repl_link_entry { ptr @test_dynamically_replaceable, ptr null }
// CHECK: @test_dynamically_replaceableTx = constant %swift.dyn_repl_key { i32{{.*}}ptr @test_dynamically_replaceableTX{{.*}}, i32 0 }, section "__TEXT,__const"
// CHECK: @test_replacementTX = global %swift.dyn_repl_link_entry zeroinitializer

// CHECK: @"\01l_unnamed_dynamic_replacements" = private constant { i32, i32, [1 x { i32, i32, i32, i32 }] }
// CHECK-SAME: { i32 0,
// CHECK-SAME:   i32 1,
// CHECK-SAME:  [1 x { i32, i32, i32, i32 }]
// CHECK-SAME:  [{ i32, i32, i32, i32 }
// CHECK-SAME:  ptr @test_dynamically_replaceableTx
// CHECK-SAME:  @test_replacement
// CHECK-SAME:  ptr @test_replacementTX
// CHECK-SAME:  i32 0 }] }, section "__TEXT,__const"

// CHECK: @"\01l_auto_dynamic_replacements" = private constant { i32, i32, [2 x i32] }
// CHECK-SAME: { i32 0, i32 1,
// CHECK-SAME: [2 x i32] [{{.*}}@"\01l_unnamed_dynamic_replacements"{{.*}}, i32 0]
// CHECK-SAME: }, section "__TEXT, __swift5_replace, regular, no_dead_strip"

// CHECK-LABEL: define swiftcc void @test_dynamically_replaceable()
// CHECK-NEXT: entry:
// COMPAT-NEXT:   [[FUN_PTR:%.*]] =  call ptr @swift_getFunctionReplacement{{.*}}(ptr @test_dynamically_replaceableTX, ptr @test_dynamically_replaceable)
// NONCOMPAT-NEXT:   [[FUN_PTR:%.*]] =  call ptr @swift_getFunctionReplacement(ptr @test_dynamically_replaceableTX, ptr @test_dynamically_replaceable)
// CHECK-NEXT:   [[CMP:%.*]] = icmp eq ptr [[FUN_PTR]], null
// CHECK-NEXT:   br i1 [[CMP]], label %[[ORIGBB:[a-z_]*]], label %[[FWBB:[a-z_]*]]
// CHECK:      [[FWBB]]:
// CHECK-NEXT:   tail call swiftcc void [[FUN_PTR]]()
// CHECK-NEXT:   ret void
// CHECK:      [[ORIGBB]]:
// CHECK-NEXT:   ret void
// CHECK-NEXT: }

sil [dynamically_replacable] @test_dynamically_replaceable : $@convention(thin) () -> () {
bb0:
  %0 = tuple ()
  return %0 : $()
}

// CHECK-LABEL: define swiftcc void @test_replacement()
// CHECK: entry:
// CHECK:   call swiftcc void @test_replacementTI()
// CHECK:   ret void
// CHECK: }

// The thunk that implement the prev_dynamic_function_ref lookup.
// CHECK-LABEL: define swiftcc void @test_replacementTI()
// CHECK: entry:
// COMPAT:   [[FUN_PTR:%.*]] = call ptr @swift_getOrigOfReplaceable{{.*}}(ptr @test_replacementTX)
// NONCOMPAT:   [[FUN_PTR:%.*]] = call ptr @swift_getOrigOfReplaceable(ptr @test_replacementTX)
// CHECK:   call swiftcc void [[FUN_PTR]]()
// CHECK:   ret void
// CHECK: }
sil [dynamic_replacement_for "test_dynamically_replaceable"] @test_replacement : $@convention(thin) () -> () {
bb0:
  %0 = prev_dynamic_function_ref @test_replacement : $@convention(thin) () -> ()
  %1 = apply %0() : $@convention(thin) () -> ()
  %2 = tuple ()
  return %2 : $()
}

// CHECK-LABEL: define swiftcc void @test_dynamic_call()
// CHECK: entry:
// CHECK:   call swiftcc void @test_dynamically_replaceable()
// CHECK:   ret void
// CHECK: }
sil @test_dynamic_call : $@convention(thin) () -> () {
bb0:
  %0 = dynamic_function_ref @test_dynamically_replaceable : $@convention(thin) () -> ()
  %1 = apply %0() : $@convention(thin) () -> ()
  %2 = tuple ()
  return %2 : $()
}