// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// AUTOUPDATE

fn Echo(a: ()) -> () {
  return a;
}

fn Main() {
  Echo(());
}

// CHECK:STDOUT: --- empty_tuple.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %.1: type = tuple_type () [template]
// CHECK:STDOUT:   %.2: () = tuple_value () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [template] {
// CHECK:STDOUT:     .Echo = %Echo
// CHECK:STDOUT:     .Main = %Main
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Echo: <function> = fn_decl @Echo [template] {
// CHECK:STDOUT:     %.loc7_13.1: () = tuple_literal ()
// CHECK:STDOUT:     %.loc7_13.2: type = converted %.loc7_13.1, constants.%.1 [template = constants.%.1]
// CHECK:STDOUT:     %a.loc7_9.1: () = param a
// CHECK:STDOUT:     @Echo.%a: () = bind_name a, %a.loc7_9.1
// CHECK:STDOUT:     %.loc7_20.1: () = tuple_literal ()
// CHECK:STDOUT:     %.loc7_20.2: type = converted %.loc7_20.1, constants.%.1 [template = constants.%.1]
// CHECK:STDOUT:     %return.var: ref () = var <return slot>
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Main: <function> = fn_decl @Main [template] {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Echo(%a: ()) -> () {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %a.ref: () = name_ref a, %a
// CHECK:STDOUT:   return %a.ref
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Main() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Echo.ref: <function> = name_ref Echo, file.%Echo [template = file.%Echo]
// CHECK:STDOUT:   %.loc12_9.1: () = tuple_literal ()
// CHECK:STDOUT:   %.loc12_9.2: () = tuple_value () [template = constants.%.2]
// CHECK:STDOUT:   %.loc12_9.3: () = converted %.loc12_9.1, %.loc12_9.2 [template = constants.%.2]
// CHECK:STDOUT:   %.loc12_7: init () = call %Echo.ref(%.loc12_9.3)
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT: