test/SILOptimizer/allocboxtostack_localapply_ossa.sil

// RUN: %target-sil-opt %s -allocbox-to-stack -sil-deadfuncelim | %FileCheck %s

sil_stage canonical

import Builtin
import Swift
import SwiftShims


sil hidden [noinline] [ossa] [Onone] @$blackhole : $@convention(thin) <T> (@in_guaranteed T) -> () {
bb0(%0 : $*T):
  %2 = tuple ()
  return %2 : $()
}

// CHECK-LABEL: sil [noinline] [ossa] @$testapply :
// CHECK-NOT: alloc_box
// CHECK: [[STK:%.*]] = alloc_stack $Int64, var, name "x"
// CHECK-LABEL: } // end sil function '$testapply'
sil [noinline] [ossa] @$testapply : $@convention(thin) () -> () {
bb0:
  %0 = alloc_box ${ var Int64 }, var, name "x"
  %1 = project_box %0 : ${ var Int64 }, 0
  %2 = integer_literal $Builtin.Int64, 0
  %3 = struct $Int64 (%2 : $Builtin.Int64)
  store %3 to [trivial] %1 : $*Int64
  %5 = function_ref @$testapplybas : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %6 = apply %5(%0) : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  destroy_value %0 : ${ var Int64 }
  %8 = tuple ()
  return %8 : $()
}

sil private [noinline] [ossa] @$testapplybar : $@convention(thin) (@guaranteed { var Int64 }) -> () {
bb0(%0 : @guaranteed ${ var Int64 }):
  %1 = project_box %0 : ${ var Int64 }, 0
  %3 = begin_access [read] [dynamic] %1 : $*Int64
  %4 = load [trivial] %3 : $*Int64
  end_access %3 : $*Int64
  %6 = alloc_stack $Int64
  store %4 to [trivial] %6 : $*Int64
  %8 = function_ref @$blackhole : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  %9 = apply %8<Int64>(%6) : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  dealloc_stack %6 : $*Int64
  %11 = tuple ()
  return %11 : $()
}

sil private [noinline] [ossa] @$testapplybas : $@convention(thin) (@guaranteed { var Int64 }) -> () {
bb0(%0 : @guaranteed ${ var Int64 }):
  %1 = project_box %0 : ${ var Int64 }, 0
  %3 = function_ref @$testapplybar : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %4 = apply %3(%0) : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %5 = tuple ()
  return %5 : $()
}

// CHECK-LABEL: sil [noinline] [ossa] @$testtryapply :
// CHECK-NOT: alloc_box
// CHECK: [[STK:%.*]] = alloc_stack $Int64, var, name "x"
// CHECK-LABEL: } // end sil function '$testtryapply'
sil [noinline] [ossa] @$testtryapply : $@convention(thin) () -> @error Error {
bb0:
  %1 = alloc_box ${ var Int64 }, var, name "x"
  %2 = project_box %1 : ${ var Int64 }, 0
  %3 = integer_literal $Builtin.Int64, 0
  %4 = struct $Int64 (%3 : $Builtin.Int64)
  store %4 to [trivial] %2 : $*Int64
  %6 = function_ref @$testtryapplybas : $@convention(thin) (@guaranteed { var Int64 }) -> @error Error
  try_apply %6(%1) : $@convention(thin) (@guaranteed { var Int64 }) -> @error Error, normal bb1, error bb2
bb1(%8 : $()):
  destroy_value %1 : ${ var Int64 }
  %10 = tuple ()
  return %10 : $()
bb2(%12 : $Error):
  destroy_value %1 : ${ var Int64 }
  throw %12 : $Error
}

sil private [noinline] [ossa] @$testtryapplybar : $@convention(thin) (@guaranteed { var Int64 }) -> @error Error {
bb0(%0 : @guaranteed ${ var Int64 }):
  %2 = project_box %0 : ${ var Int64 }, 0
  %4 = begin_access [read] [dynamic] %2 : $*Int64
  %5 = load [trivial] %4 : $*Int64
  end_access %4 : $*Int64
  %7 = alloc_stack $Int64
  store %5 to [trivial] %7 : $*Int64
  %9 = function_ref @$blackhole : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  %10 = apply %9<Int64>(%7) : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  dealloc_stack %7 : $*Int64
  %12 = tuple ()
  return %12 : $()
}

sil private [noinline] [ossa] @$testtryapplybas : $@convention(thin) (@guaranteed { var Int64 }) -> @error Error {
bb0(%0 : @guaranteed ${ var Int64 }):
  %2 = project_box %0 : ${ var Int64 }, 0
  %4 = function_ref @$testtryapplybar : $@convention(thin) (@guaranteed { var Int64 }) -> @error Error
  try_apply %4(%0) : $@convention(thin) (@guaranteed { var Int64 }) -> @error Error, normal bb1, error bb2
bb1(%6 : $()):
  %7 = tuple ()
  return %7 : $()
bb2(%9 : $Error):
  throw %9 : $Error
}


// CHECK-LABEL: sil [noinline] [ossa] @$testpartialapply :
// CHECK-NOT: alloc_box
// CHECK: [[STK:%.*]] = alloc_stack $Int64, var, name "x"
// CHECK-LABEL: } // end sil function '$testpartialapply'
sil [noinline] [ossa] @$testpartialapply : $@convention(thin) () -> () {
bb0:
  %0 = alloc_box ${ var Int64 }, var, name "x"
  %1 = project_box %0 : ${ var Int64 }, 0
  %2 = integer_literal $Builtin.Int64, 0
  %3 = struct $Int64 (%2 : $Builtin.Int64)
  store %3 to [trivial] %1 : $*Int64
  %5 = function_ref @$testpartialapplyclosure : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %6 = apply %5(%0) : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  destroy_value %0 : ${ var Int64 }
  %8 = tuple ()
  return %8 : $()
}

sil private [noinline] [ossa] @$testpartialapplybar : $@convention(thin) (@guaranteed { var Int64 }) -> () {
bb0(%0 : @guaranteed ${ var Int64 }):
  %1 = project_box %0 : ${ var Int64 }, 0
  %3 = begin_access [read] [dynamic] %1 : $*Int64
  %4 = load [trivial] %3 : $*Int64
  end_access %3 : $*Int64
  %6 = alloc_stack $Int64
  store %4 to [trivial] %6 : $*Int64
  %8 = function_ref @$blackhole : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  %9 = apply %8<Int64>(%6) : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  dealloc_stack %6 : $*Int64
  %11 = tuple ()
  return %11 : $()
}

sil private [noinline] [ossa] @$testpartialapplybas : $@convention(thin) (@guaranteed { var Int64 }) -> () {
bb0(%0 : @guaranteed ${ var Int64 }):
  %1 = project_box %0 : ${ var Int64 }, 0
  %3 = function_ref @$testpartialapplybar : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %4 = apply %3(%0) : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %5 = tuple ()
  return %5 : $()
}

sil private [ossa] @$testpartialapplyclosure : $@convention(thin) (@guaranteed { var Int64 }) -> () {
bb0(%0 : @guaranteed ${ var Int64 }):
  %1 = project_box %0 : ${ var Int64 }, 0
  %3 = function_ref @$testpartialapplybas : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %4 = apply %3(%0) : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %5 = tuple ()
  return %5 : $()
}

// CHECK-LABEL: sil [noinline] [ossa] @$testtwoboxes :
// CHECK-NOT: alloc_box
// CHECK: [[STK1:%.*]] = alloc_stack $Int64, var, name "x"
// CHECK: [[STK2:%.*]] = alloc_stack $Int64, var, name "y"
// CHECK-LABEL: } // end sil function '$testtwoboxes'
sil [noinline] [ossa] @$testtwoboxes : $@convention(thin) () -> () {
bb0:
  %0 = alloc_box ${ var Int64 }, var, name "x"
  %1 = project_box %0 : ${ var Int64 }, 0
  %2 = integer_literal $Builtin.Int64, 0
  %3 = struct $Int64 (%2 : $Builtin.Int64)
  store %3 to [trivial] %1 : $*Int64
  %5 = alloc_box ${ var Int64 }, var, name "y"
  %6 = project_box %5 : ${ var Int64 }, 0
  %7 = integer_literal $Builtin.Int64, 0
  %8 = struct $Int64 (%7 : $Builtin.Int64)
  store %8 to [trivial] %6 : $*Int64
  %10 = function_ref @$testtwoboxesbas : $@convention(thin) (@guaranteed { var Int64 }, @guaranteed { var Int64 }) -> ()
  %11 = apply %10(%0, %5) : $@convention(thin) (@guaranteed { var Int64 }, @guaranteed { var Int64 }) -> ()
  destroy_value %5 : ${ var Int64 }
  destroy_value %0 : ${ var Int64 }
  %14 = tuple ()
  return %14 : $()
}

sil private [noinline] [ossa] @$testtwoboxesbar : $@convention(thin) (@guaranteed { var Int64 }, @guaranteed { var Int64 }) -> () {
bb0(%0 : @guaranteed ${ var Int64 }, %1 : @guaranteed ${ var Int64 }):
  %2 = project_box %0 : ${ var Int64 }, 0
  %4 = project_box %1 : ${ var Int64 }, 0
  %6 = begin_access [read] [dynamic] %2 : $*Int64
  %7 = load [trivial] %6 : $*Int64
  end_access %6 : $*Int64
  %9 = alloc_stack $Int64
  store %7 to [trivial] %9 : $*Int64
  %11 = function_ref @$blackhole : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  %12 = apply %11<Int64>(%9) : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  dealloc_stack %9 : $*Int64
  %14 = begin_access [read] [dynamic] %4 : $*Int64
  %15 = load [trivial] %14 : $*Int64
  end_access %14 : $*Int64
  %17 = alloc_stack $Int64
  store %15 to [trivial] %17 : $*Int64
  %19 = function_ref @$blackhole : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  %20 = apply %19<Int64>(%17) : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  dealloc_stack %17 : $*Int64
  %22 = tuple ()
  return %22 : $()
}

sil private [noinline] [ossa] @$testtwoboxesbas : $@convention(thin) (@guaranteed { var Int64 }, @guaranteed { var Int64 }) -> () {
bb0(%0 : @guaranteed ${ var Int64 }, %1 : @guaranteed ${ var Int64 }):
  %2 = project_box %0 : ${ var Int64 }, 0
  %4 = project_box %1 : ${ var Int64 }, 0
  %6 = function_ref @$testtwoboxesbar : $@convention(thin) (@guaranteed { var Int64 }, @guaranteed { var Int64 }) -> ()
  %7 = apply %6(%0, %1) : $@convention(thin) (@guaranteed { var Int64 }, @guaranteed { var Int64 }) -> ()
  %8 = tuple ()
  return %8 : $()
}

// CHECK-LABEL: sil [noinline] [ossa] @$testboxescapes :
// CHECK: alloc_box ${ var Int64 }, var, name "x"
// CHECK-LABEL: } // end sil function '$testboxescapes'
sil [noinline] [ossa] @$testboxescapes : $@convention(thin) () -> @owned @callee_guaranteed () -> () {
bb0:
  %0 = alloc_box ${ var Int64 }, var, name "x"
  %1 = project_box %0 : ${ var Int64 }, 0
  %2 = integer_literal $Builtin.Int64, 0
  %3 = struct $Int64 (%2 : $Builtin.Int64)
  store %3 to [trivial] %1 : $*Int64
  %5 = function_ref @$testboxescapesbas : $@convention(thin) (@guaranteed { var Int64 }) -> @owned @callee_guaranteed () -> ()
  %6 = apply %5(%0) : $@convention(thin) (@guaranteed { var Int64 }) -> @owned @callee_guaranteed () -> ()
  destroy_value %0 : ${ var Int64 }
  return %6 : $@callee_guaranteed () -> ()
}

sil private [noinline] [ossa] @$testboxescapesbar : $@convention(thin) (@guaranteed { var Int64 }) -> @owned @callee_guaranteed () -> () {
bb0(%0 : @guaranteed ${ var Int64 }):
  %1 = project_box %0 : ${ var Int64 }, 0
  %3 = function_ref @$testboxescapesclosure : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %copy = copy_value %0 : ${ var Int64 }
  %5 = partial_apply [callee_guaranteed] %3(%copy) : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  return %5 : $@callee_guaranteed () -> ()
}

sil private [ossa] @$testboxescapesclosure : $@convention(thin) (@guaranteed { var Int64 }) -> () {
bb0(%0 : @guaranteed ${ var Int64 }):
  %1 = project_box %0 : ${ var Int64 }, 0
  %3 = load [trivial] %1 : $*Int64
  %4 = tuple ()
  return %4 : $()
}

sil private [noinline] [ossa] @$testboxescapesbas : $@convention(thin) (@guaranteed { var Int64 }) -> @owned @callee_guaranteed () -> () {
bb0(%0 : @guaranteed ${ var Int64 }):
  %1 = project_box %0 : ${ var Int64 }, 0
  %3 = function_ref @$testboxescapesbar : $@convention(thin) (@guaranteed { var Int64 }) -> @owned @callee_guaranteed () -> ()
  %4 = apply %3(%0) : $@convention(thin) (@guaranteed { var Int64 }) -> @owned @callee_guaranteed () -> ()
  return %4 : $@callee_guaranteed () -> ()
}

// CHECK-LABEL: sil [noinline] [ossa] @$testrecur :
// CHECK: alloc_box ${ var Int64 }, var, name "x"
// CHECK-LABEL: } // end sil function '$testrecur'
sil [noinline] [ossa] @$testrecur : $@convention(thin) () -> () {
bb0:
  %0 = alloc_box ${ var Int64 }, var, name "x"
  %1 = project_box %0 : ${ var Int64 }, 0
  %2 = integer_literal $Builtin.Int64, 0
  %3 = struct $Int64 (%2 : $Builtin.Int64)
  store %3 to [trivial] %1 : $*Int64
  %5 = function_ref @$testrecurbas : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %6 = apply %5(%0) : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %7 = function_ref @$testrecurbar : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %8 = apply %7(%0) : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  destroy_value %0 : ${ var Int64 }
  %10 = tuple ()
  return %10 : $()
}

sil private [noinline] [ossa] @$testrecurbar : $@convention(thin) (@guaranteed { var Int64 }) -> () {
bb0(%0 : @guaranteed ${ var Int64 }):
  %1 = project_box %0 : ${ var Int64 }, 0
  %3 = begin_access [read] [dynamic] %1 : $*Int64
  %4 = load [trivial] %3 : $*Int64
  end_access %3 : $*Int64
  %6 = alloc_stack $Int64
  store %4 to [trivial] %6 : $*Int64
  %8 = function_ref @$blackhole : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  %9 = apply %8<Int64>(%6) : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  dealloc_stack %6 : $*Int64
  %11 = function_ref @$testrecurbas : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %12 = apply %11(%0) : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %13 = tuple ()
  return %13 : $()
}

sil private [noinline] [ossa] @$testrecurbas : $@convention(thin) (@guaranteed { var Int64 }) -> () {
bb0(%0 : @guaranteed ${ var Int64 }):
  %1 = project_box %0 : ${ var Int64 }, 0
  %3 = function_ref @$testrecurbar : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %4 = apply %3(%0) : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %5 = tuple ()
  return %5 : $()
}

// CHECK-LABEL: sil [noinline] [ossa] @$testbeginapply :
// CHECK-NOT: alloc_box
// CHECK: [[STK:%.*]] = alloc_stack $Int64, var, name "x"
// CHECK-LABEL: } // end sil function '$testbeginapply'
sil [noinline] [ossa] @$testbeginapply : $@convention(thin) () -> () {
bb0:
  %0 = alloc_box ${ var Int64 }, var, name "x"
  %1 = project_box %0 : ${ var Int64 }, 0
  %2 = integer_literal $Builtin.Int64, 0
  %3 = struct $Int64 (%2 : $Builtin.Int64)
  store %3 to [trivial] %1 : $*Int64
  %5 = function_ref @$testbeginapplybas : $@yield_once @convention(thin) (@guaranteed { var Int64 }) -> @yields ()
  (%addr, %token) = begin_apply %5(%0) : $@yield_once @convention(thin) (@guaranteed { var Int64 }) -> @yields ()
  end_apply %token
  destroy_value %0 : ${ var Int64 }
  %8 = tuple ()
  return %8 : $()
}

sil private [noinline] [ossa] @$testbeginapplybar : $@convention(thin) (@guaranteed { var Int64 }) -> () {
bb0(%0 : @guaranteed ${ var Int64 }):
  %1 = project_box %0 : ${ var Int64 }, 0
  %3 = begin_access [read] [dynamic] %1 : $*Int64
  %4 = load [trivial] %3 : $*Int64
  end_access %3 : $*Int64
  %6 = alloc_stack $Int64
  store %4 to [trivial] %6 : $*Int64
  %8 = function_ref @$blackhole : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  %9 = apply %8<Int64>(%6) : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  dealloc_stack %6 : $*Int64
  %11 = tuple ()
  return %11 : $()
}

sil private [noinline] [ossa] @$testbeginapplybas : $@yield_once @convention(thin) (@guaranteed { var Int64 }) -> @yields () {
bb0(%0 : @guaranteed ${ var Int64 }):
  %1 = project_box %0 : ${ var Int64 }, 0
  %3 = function_ref @$testbeginapplybar : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %4 = apply %3(%0) : $@convention(thin) (@guaranteed { var Int64 }) -> ()
  %5 = tuple ()
  yield %5 : $(), resume bb1, unwind bb2
bb1:
  %rv = tuple()
  return %rv : $()
bb2:
  unwind
}

struct Int {
  var _value: Builtin.Int64
}

// Test to make sure AppliesToSpecialize in AllocBoxToStack is populated correctly when there are common function calls for mutiple allox_boxes.
// Order of function calls constructed in PromotedOperands: bar common bas common.
// AppliesToSpecialize should have the order: bar bas common.
// Only then, the functions get specialized correctly, and we won't see an assert in checkNoPromotedBoxInApply.
// CHECK-LABEL: sil [noinline] [ossa] @$testdfs1 :
// CHECK-NOT : alloc_box ${ var Int64 }, var, name "x"
// CHECK-NOT : alloc_box ${ var Int64 }, var, name "y"
// CHECK-LABEL:} // end sil function '$testdfs1'
sil [noinline] [ossa] @$testdfs1 : $@convention(thin) () -> Int64 {
bb0:
  %0 = alloc_box ${ var Int64 }, var, name "x"
  %1 = project_box %0 : ${ var Int64 }, 0
  %2 = integer_literal $Builtin.Int64, 0
  %3 = struct $Int64 (%2 : $Builtin.Int64)
  store %3 to [trivial] %1 : $*Int64
  %5 = alloc_box ${ var Int64 }, var, name "y"
  %6 = project_box %5 : ${ var Int64 }, 0
  %7 = integer_literal $Builtin.Int64, 0
  %8 = struct $Int64 (%7 : $Builtin.Int64)
  store %8 to [trivial] %6 : $*Int64
  %10 = function_ref @$testdfs1common : $@convention(thin) (@guaranteed { var Int64 }, @guaranteed { var Int64 }) -> Int64
  %11 = apply %10(%0, %5) : $@convention(thin) (@guaranteed { var Int64 }, @guaranteed { var Int64 }) -> Int64
  destroy_value %5 : ${ var Int64 }
  destroy_value %0 : ${ var Int64 }
  return %11 : $Int64
}

sil private [noinline] [ossa] @$testdfs1common : $@convention(thin) (@guaranteed { var Int64 }, @guaranteed { var Int64 }) -> Int64 {
bb0(%0 : @guaranteed ${ var Int64 }, %1 : @guaranteed ${ var Int64 }):
  %proj1 = project_box %0 : ${ var Int64 }, 0
  %proj2 = project_box %1 : ${ var Int64 }, 0
  %barfunc = function_ref @$testdfs1bar : $@convention(thin) (@guaranteed { var Int64 }) -> Int64
  %res1 = apply %barfunc(%0) : $@convention(thin) (@guaranteed { var Int64 }) -> Int64
  %basfunc = function_ref @$testdfs1bas : $@convention(thin) (@guaranteed { var Int64 }) -> Int64
  %res2 = apply %basfunc(%1) : $@convention(thin) (@guaranteed { var Int64 }) -> Int64
  %func = function_ref @$blackhole : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  %tmp1 = apply %func<Int64>(%proj1) : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  %tmp2 = apply %func<Int64>(%proj2) : $@convention(thin) <τ_0_0> (@in_guaranteed τ_0_0) -> ()
  %res = load [trivial] %proj1 : $*Int64
  return %res : $Int64
}

sil private [noinline] [ossa] @$testdfs1bar : $@convention(thin) (@guaranteed { var Int64 }) -> Int64 {
bb0(%0 : @guaranteed ${ var Int64 }):
  %1 = project_box %0 : ${ var Int64 }, 0
  %4 = load [trivial] %1 : $*Int64
  return %4 : $Int64
}

sil private [noinline] [ossa] @$testdfs1bas : $@convention(thin) (@guaranteed { var Int64 }) -> Int64 {
bb0(%0 : @guaranteed ${ var Int64 }):
  %1 = project_box %0 : ${ var Int64 }, 0
  %4 = load [trivial] %1 : $*Int64
  return %4 : $Int64
}

// Test to make sure we don't optimize the case when we have an inner common function call for multiple boxes.
// We don't optimize this case now, because we don't have additional logic to correctly construct AppliesToSpecialize
// Order of function calls constructed in PromotedOperands: bar innercommon local1 bas innercommon local2
// AppliesToSpecialize should have the order: bar bas innercommon local1 local2
// Since we don't maintain any tree like data structure with more info on the call tree, this is not possible to contruct today 
// CHECK-LABEL: sil [noinline] [ossa] @$testdfs2 :
// CHECK: alloc_box ${ var Int }, var, name "x"
// CHECK: alloc_box ${ var Int }, var, name "y"
// CHECK-LABEL:} // end sil function '$testdfs2'
sil [noinline] [ossa] @$testdfs2 : $@convention(thin) () -> Int {
bb0:
  %0 = alloc_box ${ var Int }, var, name "x"
  %1 = project_box %0 : ${ var Int }, 0
  %2 = integer_literal $Builtin.Int64, 0
  %3 = struct $Int (%2 : $Builtin.Int64)
  store %3 to [trivial] %1 : $*Int
  %5 = alloc_box ${ var Int }, var, name "y"
  %6 = project_box %5 : ${ var Int }, 0
  %7 = integer_literal $Builtin.Int64, 0
  %8 = struct $Int (%7 : $Builtin.Int64)
  store %8 to [trivial] %6 : $*Int
  %10 = function_ref @$testdfs2local1 : $@convention(thin) (@guaranteed { var Int }, @guaranteed { var Int }) -> Int
  %11 = apply %10(%0, %5) : $@convention(thin) (@guaranteed { var Int }, @guaranteed { var Int }) -> Int
  %12 = function_ref @$testdfs2local2 : $@convention(thin) (@guaranteed { var Int }, @guaranteed { var Int }) -> Int
  %13 = apply %12(%0, %5) : $@convention(thin) (@guaranteed { var Int }, @guaranteed { var Int }) -> Int
  %14 = struct_extract %11 : $Int, #Int._value
  %15 = struct_extract %13 : $Int, #Int._value
  %16 = integer_literal $Builtin.Int1, -1
  %17 = builtin "sadd_with_overflow_Int64"(%14 : $Builtin.Int64, %15 : $Builtin.Int64, %16 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1)
  (%18, %19) = destructure_tuple %17 : $(Builtin.Int64, Builtin.Int1)
  cond_fail %19 : $Builtin.Int1, "arithmetic overflow"
  %21 = struct $Int (%18 : $Builtin.Int64)
  destroy_value %5 : ${ var Int }
  destroy_value %0 : ${ var Int }
  return %21 : $Int
}

sil private [noinline] [ossa] @$testdfs2bar : $@convention(thin) (@guaranteed { var Int }) -> Int {
bb0(%0 : @guaranteed ${ var Int }):
  %1 = project_box %0 : ${ var Int }, 0
  %4 = load [trivial] %1 : $*Int
  return %4 : $Int
}

sil private [noinline] [ossa] @$testdfs2bas : $@convention(thin) (@guaranteed { var Int }) -> Int {
bb0(%0 : @guaranteed ${ var Int }):
  %1 = project_box %0 : ${ var Int }, 0
  %4 = load [trivial] %1 : $*Int
  return %4 : $Int
}

sil private [noinline] [ossa] @$testdfs2innercommon : $@convention(thin) (@guaranteed { var Int }, @guaranteed { var Int }) -> Int {
bb0(%0 : @guaranteed ${ var Int }, %1 : @guaranteed ${ var Int }):
  %2 = project_box %0 : ${ var Int }, 0
  %4 = project_box %1 : ${ var Int }, 0
  %8 = function_ref @$testdfs2bar : $@convention(thin) (@guaranteed { var Int }) -> Int
  %9 = apply %8(%0) : $@convention(thin) (@guaranteed { var Int }) -> Int
  %11 = function_ref @$testdfs2bas : $@convention(thin) (@guaranteed { var Int }) -> Int
  %12 = apply %11(%1) : $@convention(thin) (@guaranteed { var Int }) -> Int
  return %12 : $Int
}

sil private [noinline] [ossa] @$testdfs2local1 : $@convention(thin) (@guaranteed { var Int }, @guaranteed { var Int }) -> Int {
bb0(%0 : @guaranteed ${ var Int }, %1 : @guaranteed ${ var Int }):
  %2 = project_box %0 : ${ var Int }, 0
  %4 = project_box %1 : ${ var Int }, 0
  %7 = function_ref @$testdfs2innercommon : $@convention(thin) (@guaranteed { var Int }, @guaranteed { var Int }) -> Int
  %8 = apply %7(%0, %1) : $@convention(thin) (@guaranteed { var Int }, @guaranteed { var Int }) -> Int
  return %8 : $Int
}

sil private [noinline] [ossa] @$testdfs2local2 : $@convention(thin) (@guaranteed { var Int }, @guaranteed { var Int }) -> Int {
bb0(%0 : @guaranteed ${ var Int }, %1 : @guaranteed ${ var Int }):
  %2 = project_box %0 : ${ var Int }, 0
  %4 = project_box %1 : ${ var Int }, 0
  %7 = function_ref @$testdfs2innercommon : $@convention(thin) (@guaranteed { var Int }, @guaranteed { var Int }) -> Int
  %8 = apply %7(%0, %1) : $@convention(thin) (@guaranteed { var Int }, @guaranteed { var Int }) -> Int
  return %8 : $Int
}