// RUN: %target-sil-opt -enable-sil-verify-all %s -global-opt | FileCheck %s

import Builtin
import Swift

// Check that token0 gets eliminated as it is not used after removing the once call.
// CHECK-NOT: sil_global private @globalinit_token0 : $Builtin.Word
sil_global private @globalinit_token0 : $Builtin.Word

// CHECK: sil_global @_Tv2ch1xSi : $Int32, @globalinit_func0 : $@convention(thin) () -> ()
sil_global @_Tv2ch1xSi : $Int32

// CHECK-LABEL: sil private @globalinit_func0 : $@convention(thin) () -> () {
sil private @globalinit_func0 : $@convention(thin) () -> () {
bb0:
  %0 = global_addr @_Tv2ch1xSi : $*Int32
  %1 = integer_literal $Builtin.Int32, 2
  %2 = struct $Int32 (%1 : $Builtin.Int32)
  store %2 to %0 : $*Int32
  %4 = tuple ()
  return %4 : $()
}

// CHECK-LABEL: sil [global_init] @_TF2cha1xSi : $@convention(thin) () -> Builtin.RawPointer {
// CHECK-NEXT: bb0:
// CHECK-NOT: global_addr @globalinit_token0
// CHECK-NEXT: address_to_pointer
// CHECK: function_ref @globalinit_func0 : $@convention(thin) () -> ()
// CHECK-NEXT: global_addr @_Tv2ch1xSi : $*Int32
// CHECK-NEXT: address_to_pointer
// CHECK-NEXT: return
sil [global_init] @_TF2cha1xSi : $@convention(thin) () -> Builtin.RawPointer {
bb0:
  %1 = global_addr @globalinit_token0 : $*Builtin.Word
  %2 = address_to_pointer %1 : $*Builtin.Word to $Builtin.RawPointer
  %3 = function_ref @globalinit_func0 : $@convention(thin) () -> ()
  %5 = builtin "once"(%2 : $Builtin.RawPointer, %3 : $@convention(thin) () -> ()) : $()
  %6 = global_addr @_Tv2ch1xSi : $*Int32
  %7 = address_to_pointer %6 : $*Int32 to $Builtin.RawPointer
  return %7 : $Builtin.RawPointer
}

// CHECK-LABEL: sil @_TF2ch1fFT_Si : $@convention(thin) () -> Int32 {
sil @_TF2ch1fFT_Si : $@convention(thin) () -> Int32 {
bb0:
  %0 = function_ref @_TF2cha1xSi : $@convention(thin) () -> Builtin.RawPointer
  %1 = apply %0() : $@convention(thin) () -> Builtin.RawPointer
  %2 = pointer_to_address %1 : $Builtin.RawPointer to [strict] $*Int32
  %3 = load %2 : $*Int32
  return %3 : $Int32
}