test/SIL/ownership-verifier/cond_br_crash.sil

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

sil_stage canonical

import Builtin

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

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

// Make sure that we correctly flag a double consume by a cond_br of an argument along one edge.
//
// CHECK-LABEL: Function: 'test1'
// CHECK: Found over consume?!
// CHECK: Value:   %0 = argument of bb0 : $Builtin.NativeObject
// CHECK: User:   cond_br undef, bb1(%0 : $Builtin.NativeObject), bb2
// CHECK: Block: bb0
sil [ossa] @test1 : $@convention(thin) (@owned Builtin.NativeObject) -> () {
bb0(%0 : @owned $Builtin.NativeObject):
  destroy_value %0 : $Builtin.NativeObject
  cond_br undef, bb1(%0 : $Builtin.NativeObject), bb2

bb1(%1 : @owned $Builtin.NativeObject):
  destroy_value %1 : $Builtin.NativeObject
  br bb2

bb2:
  %9999 = tuple()
  return %9999 : $()
}

// Make sure that we correctly flag a double consume in the next block.
//
// CHECK-LABEL: Function: 'test2'
// CHECK: Found over consume?!
// CHECK: Value:   %0 = argument of bb0 : $Builtin.NativeObject
// CHECK: User:   destroy_value %0 : $Builtin.NativeObject
// CHECK: Block: bb1
sil [ossa] @test2 : $@convention(thin) (@owned Builtin.NativeObject) -> () {
bb0(%0 : @owned $Builtin.NativeObject):
  cond_br undef, bb1(%0 : $Builtin.NativeObject), bb2

bb1(%1 : @owned $Builtin.NativeObject):
  destroy_value %0 : $Builtin.NativeObject
  destroy_value %1 : $Builtin.NativeObject
  br bb2

bb2:
  %9999 = tuple()
  return %9999 : $()
}

// Now check for use after frees in the consuming block.
//
// CHECK-LABEL: Function: 'test3'
// CHECK: Found use after free?!
// CHECK: Value:   %0 = argument of bb0 : $Builtin.NativeObject
// CHECK: Consuming User:   cond_br undef, bb1(%0 : $Builtin.NativeObject), bb2
// CHECK: Non Consuming User:   end_borrow %3 : $Builtin.NativeObject
// CHECK: Block: bb1
sil [ossa] @test3 : $@convention(thin) (@owned Builtin.NativeObject) -> () {
bb0(%0 : @owned $Builtin.NativeObject):
  cond_br undef, bb1(%0 : $Builtin.NativeObject), bb2

bb1(%1 : @owned $Builtin.NativeObject):
  %2 = begin_borrow %0 : $Builtin.NativeObject
  end_borrow %2 : $Builtin.NativeObject
  destroy_value %1 : $Builtin.NativeObject
  br bb2

bb2:
  %9999 = tuple()
  return %9999 : $()
}