test/SIL/ownership-verifier/leaks.sil

// RUN: %target-sil-opt -module-name Swift -sil-ownership-verifier-enable-testing -enable-sil-verify-all=0 %s -o /dev/null 2>&1 | %FileCheck %s
// REQUIRES: asserts

// This file is meant to contain dataflow tests that are true leaks. It is
// intended to test both that we are failing and that we are emitting
// appropriate error messages.

//////////////////
// Declarations //
//////////////////

sil_stage canonical

import Builtin

///////////
// Tests //
///////////

// CHECK-LABEL: Function: 'owned_never_consumed'
// CHECK: Error! Found a leaked owned value that was never consumed.
// CHECK: Value:   %1 = copy_value %0 : $Builtin.NativeObject
sil [ossa] @owned_never_consumed : $@convention(thin) (@guaranteed Builtin.NativeObject) -> () {
bb0(%0 : @guaranteed $Builtin.NativeObject):
  %1 = copy_value %0 : $Builtin.NativeObject
  %9999 = tuple()
  return %9999 : $()
}

// CHECK-LABEL: Function: 'owned_leaks_along_one_path'
// CHECK: Error! Found a leak due to a consuming post-dominance failure!
// CHECK:     Value: %0 = argument of bb0 : $Builtin.NativeObject
// CHECK:     Post Dominating Failure Blocks:
// CHECK:         bb1
sil [ossa] @owned_leaks_along_one_path : $@convention(thin) (@owned Builtin.NativeObject) -> () {
bb0(%0 : @owned $Builtin.NativeObject):
  cond_br undef, bb1, bb2

bb1:
  br bb3

bb2:
  destroy_value %0 : $Builtin.NativeObject
  br bb3

bb3:
  %9999 = tuple()
  return %9999 : $()
}

// Make sure that we report the leak at the phi.
// CHECK-LABEL: Function: 'owned_leaks_with_phi'
// CHECK: Error! Found a leaked owned value that was never consumed.
// CHECK: Value: %6 = argument of bb4 : $Builtin.NativeObject
sil [ossa] @owned_leaks_with_phi : $@convention(thin) (@owned Builtin.NativeObject) -> () {
bb0(%0 : @owned $Builtin.NativeObject):
  br bb1(%0 : $Builtin.NativeObject)

bb1(%1 : @owned $Builtin.NativeObject):
  cond_br undef, bb3, bb2

bb2:
  br bb4(%1 : $Builtin.NativeObject)

bb3:
  br bb1(%1 : $Builtin.NativeObject)

bb4(%2 : @owned $Builtin.NativeObject):
  %9999 = tuple()
  return %9999 : $()
}