test/SILOptimizer/access_marker_selection.sil

// RUN: %target-sil-opt -enable-sil-verify-all %s -access-enforcement-selection -enforce-exclusivity=checked | %FileCheck %s

sil_stage raw

import Builtin
import Swift

sil @closure : $@convention(thin) (@owned { var Builtin.Int64 }) -> () {
bb0(%0 : ${var Builtin.Int64}):
  %empty = tuple ()
  return %empty : $()
}

// An access that escapes on an unreachable path must be dynamic.
//
// CHECK-LABEL: sil @partialUnreachable : $@convention(thin) () -> () {
// CHECK: %[[ACCESS:.*]] = begin_access [modify] [dynamic] %{{.*}} : $*Builtin.Int64
// CHECK: bb1:
// CHECK: end_access %[[ACCESS]] : $*Builtin.Int64
// CHECK: return
// CHECK: bb2:
// CHECK: partial_apply
// CHECK: unreachable
sil @partialUnreachable : $@convention(thin) () -> () {
bb0:
  %box = alloc_box ${ var Builtin.Int64 }, var, name "x"
  %addr = project_box %box : ${ var Builtin.Int64 }, 0
  %write = begin_access [modify] [unknown] %addr : $*Builtin.Int64
  cond_br undef, bb1, bb2

bb1:
  end_access %write : $*Builtin.Int64
  %empty = tuple ()
  return %empty : $()

bb2:
  %f = function_ref @closure : $@convention(thin) (@owned { var Builtin.Int64 }) -> ()
  %closure = partial_apply %f(%box) : $@convention(thin) (@owned { var Builtin.Int64 }) -> ()
  unreachable
}