File: guaranteed_phis.sil

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// RUN: %target-sil-opt -enable-sil-verify-all %s
import Swift
import Builtin

class SuperKlass {}

class Klass : SuperKlass {}

struct Wrapper1 {
  var val1: Wrapper2
}

struct Wrapper2 {
  var val2: Klass
}

sil @use_superklass : $@convention(thin) (@guaranteed SuperKlass) -> ()
sil @use_klass : $@convention(thin) (@guaranteed Klass) -> ()

sil @use_wrapper2 : $@convention(thin) (@guaranteed Wrapper2) -> ()

sil [ossa] @test_forwarded_phi1 : $@convention(thin) (@owned Klass) -> () {
bb0(%0 : @owned $Klass):
  %outer = begin_borrow %0 : $Klass
  br bb1

bb1:
  %cast1 = unchecked_ref_cast %outer : $Klass to $SuperKlass
  br bb2(%cast1 : $SuperKlass)

bb2(%phi : @guaranteed $SuperKlass):
  %f = function_ref @use_superklass : $@convention(thin) (@guaranteed SuperKlass) -> ()
  apply %f(%phi) : $@convention(thin) (@guaranteed SuperKlass) -> ()
  end_borrow %outer : $Klass
  destroy_value %0 : $Klass
  %9999 = tuple()
  return %9999 : $()
}

sil [ossa] @test_forwarded_phi2 : $@convention(thin) (@owned Wrapper1) -> () {
bb0(%0 : @owned $Wrapper1):
  %outer = begin_borrow %0 : $Wrapper1
  br bb1

bb1:
  %ex1 = struct_extract %outer : $Wrapper1, #Wrapper1.val1
  br bb2(%ex1 : $Wrapper2)

bb2(%phi1 : @guaranteed $Wrapper2):
  %ex2 = struct_extract %phi1 : $Wrapper2, #Wrapper2.val2
  br bb3(%ex2 : $Klass)

bb3(%phi2 : @guaranteed $Klass):
  %f = function_ref @use_klass : $@convention(thin) (@guaranteed Klass) -> ()
  apply %f(%phi2) : $@convention(thin) (@guaranteed Klass) -> ()
  end_borrow %outer : $Wrapper1
  destroy_value %0 : $Wrapper1
  %9999 = tuple()
  return %9999 : $()
}

sil [ossa] @test_forwarded_phi3 : $@convention(thin) (@owned Wrapper1) -> () {
bb0(%0 : @owned $Wrapper1):
  %outer = begin_borrow %0 : $Wrapper1
  br bb1

bb1:
  %ex1 = struct_extract %outer : $Wrapper1, #Wrapper1.val1
  br bb2(%ex1 : $Wrapper2, %outer : $Wrapper1)

bb2(%phi1 : @guaranteed $Wrapper2, %phi2 : @guaranteed $Wrapper1):
  %ex2 = struct_extract %phi1 : $Wrapper2, #Wrapper2.val2
  br bb3(%ex2 : $Klass)

bb3(%phi3 : @guaranteed $Klass):
  %f = function_ref @use_klass : $@convention(thin) (@guaranteed Klass) -> ()
  apply %f(%phi3) : $@convention(thin) (@guaranteed Klass) -> ()
  end_borrow %phi2 : $Wrapper1
  destroy_value %0 : $Wrapper1
  %9999 = tuple()
  return %9999 : $()
}

sil [ossa] @test_forwarded_phi4 : $@convention(thin) (@owned Wrapper1) -> () {
bb0(%0 : @owned $Wrapper1):
  %outer = begin_borrow %0 : $Wrapper1
  br bb1

bb1:
  %ex1 = struct_extract %outer : $Wrapper1, #Wrapper1.val1
  br bb2(%ex1 : $Wrapper2, %outer : $Wrapper1)

bb2(%phi1 : @guaranteed $Wrapper2, %phi2 : @guaranteed $Wrapper1):
  %ex2 = struct_extract %phi1 : $Wrapper2, #Wrapper2.val2
  br bb3(%ex2 : $Klass, %phi2 : $Wrapper1)

bb3(%phi3 : @guaranteed $Klass, %phi4 : @guaranteed $Wrapper1):
  %f = function_ref @use_klass : $@convention(thin) (@guaranteed Klass) -> ()
  apply %f(%phi3) : $@convention(thin) (@guaranteed Klass) -> ()
  end_borrow %phi4 : $Wrapper1
  destroy_value %0 : $Wrapper1
  %9999 = tuple()
  return %9999 : $()
}

sil [ossa] @test_forwarded_phi5 : $@convention(thin) (@owned Wrapper1) -> () {
bb0(%0 : @owned $Wrapper1):
  %outer = begin_borrow %0 : $Wrapper1
  br bb1

bb1:
  %ex1 = struct_extract %outer : $Wrapper1, #Wrapper1.val1
  br bb2(%ex1 : $Wrapper2, %outer : $Wrapper1, %0 : $Wrapper1)

bb2(%phi1 : @guaranteed $Wrapper2, %phi2 : @guaranteed $Wrapper1, %phi3 : @owned $Wrapper1):
  %ex2 = struct_extract %phi1 : $Wrapper2, #Wrapper2.val2
  br bb3(%ex2 : $Klass, %phi2 : $Wrapper1, %phi3 : $Wrapper1)

bb3(%phi4 : @guaranteed $Klass, %phi5 : @guaranteed $Wrapper1, %phi6 : @owned $Wrapper1):
  %f = function_ref @use_klass : $@convention(thin) (@guaranteed Klass) -> ()
  apply %f(%phi4) : $@convention(thin) (@guaranteed Klass) -> ()
  end_borrow %phi5 : $Wrapper1
  destroy_value %phi6 : $Wrapper1
  %9999 = tuple()
  return %9999 : $()
}

sil [ossa] @test_forwarded_phi6 : $@convention(thin) (@owned Wrapper1, @owned Wrapper1) -> () {
bb0(%0 : @owned $Wrapper1, %1 : @owned $Wrapper1):
  cond_br undef, bb1, bb2

bb1:
  %b1 = begin_borrow %0 : $Wrapper1
  %ex1 = struct_extract %b1 : $Wrapper1, #Wrapper1.val1
  br bb3(%ex1 : $Wrapper2, %b1 : $Wrapper1)

bb2:
  %b2 = begin_borrow %1 : $Wrapper1
  %ex2 = struct_extract %b2 : $Wrapper1, #Wrapper1.val1
  br bb3(%ex2 : $Wrapper2, %b2 : $Wrapper1)

bb3(%phi1 : @guaranteed $Wrapper2, %phi2 : @guaranteed $Wrapper1):
  %ex3 = struct_extract %phi1 : $Wrapper2, #Wrapper2.val2
  br bb4(%ex3 : $Klass, %phi2 : $Wrapper1)

bb4(%phi3 : @guaranteed $Klass, %phi4 : @guaranteed $Wrapper1):
  %f = function_ref @use_klass : $@convention(thin) (@guaranteed Klass) -> ()
  apply %f(%phi3) : $@convention(thin) (@guaranteed Klass) -> ()
  end_borrow %phi4 : $Wrapper1
  destroy_value %0 : $Wrapper1
  destroy_value %1 : $Wrapper1
  %9999 = tuple()
  return %9999 : $()
}

sil [ossa] @test_forwarded_phi7 : $@convention(thin) (@owned Wrapper1) -> () {
bb0(%0 : @owned $Wrapper1):
  %outer = begin_borrow %0 : $Wrapper1
  %ex1 = struct_extract %outer : $Wrapper1, #Wrapper1.val1
  br bb1(%ex1 : $Wrapper2, %outer : $Wrapper1)

bb1(%phi1 : @guaranteed $Wrapper2, %phi2 : @guaranteed $Wrapper1):
  %f = function_ref @use_wrapper2 : $@convention(thin) (@guaranteed Wrapper2) -> ()
  apply %f(%phi1) : $@convention(thin) (@guaranteed Wrapper2) -> ()
  %ex2 = struct_extract %phi2 : $Wrapper1, #Wrapper1.val1
  br bb3(%ex2 : $Wrapper2, %phi2 : $Wrapper1)

bb3(%phi3 : @guaranteed $Wrapper2, %phi4 : @guaranteed $Wrapper1):
  apply %f(%phi3) : $@convention(thin) (@guaranteed Wrapper2) -> ()
  end_borrow %phi4 : $Wrapper1
  destroy_value %0 : $Wrapper1
  %9999 = tuple()
  return %9999 : $()
}

sil [ossa] @test_forwarded_phi8 : $@convention(method) (@guaranteed Wrapper1) -> (UInt64, UInt64) {
bb0(%0 : @guaranteed $Wrapper1):
  %2 = struct_extract %0 : $Wrapper1, #Wrapper1.val1
  %3 = begin_borrow %0 : $Wrapper1
  %4 = struct_extract %3 : $Wrapper1, #Wrapper1.val1
  br bb1(%4 : $Wrapper2, %3 : $Wrapper1)

bb1(%6 : @guaranteed $Wrapper2, %7 : @guaranteed $Wrapper1):
  %8 = copy_value %6 : $Wrapper2
  %9 = unchecked_trivial_bit_cast %8 : $Wrapper2 to $UInt64
  destroy_value %8 : $Wrapper2
  end_borrow %7 : $Wrapper1
  %12 = tuple (%9 : $UInt64, %9 : $UInt64)
  return %12 : $(UInt64, UInt64)
}

sil [ossa] @test_forwarded_phi9 : $@convention(thin) (@owned Wrapper1) -> () {
bb0(%0 : @owned $Wrapper1):
  %outer = begin_borrow %0 : $Wrapper1
  %ex1 = struct_extract %outer : $Wrapper1, #Wrapper1.val1
  %ex2 = struct_extract %ex1 : $Wrapper2, #Wrapper2.val2
  %f = function_ref @use_klass : $@convention(thin) (@guaranteed Klass) -> ()
  apply %f(%ex2) : $@convention(thin) (@guaranteed Klass) -> ()
  end_borrow %outer : $Wrapper1
  destroy_value %0 : $Wrapper1
  %9999 = tuple()
  return %9999 : $()
}

struct TStruct {
}

sil [ossa] @test_forwarding_phi10 : $@convention(thin) (@owned Wrapper2) -> (TStruct, TStruct) {
bb0(%0 : @owned $Wrapper2):
  %outer = begin_borrow %0 : $Wrapper2
  %ex1 = struct_extract %outer : $Wrapper2, #Wrapper2.val2
  br bb2(%ex1 : $Klass, %outer : $Wrapper2)

bb2(%phi1 : @guaranteed $Klass, %phi2 : @guaranteed $Wrapper2):
  %copy = copy_value %phi1 : $Klass
  %cast = unchecked_trivial_bit_cast %copy : $Klass to $TStruct
  destroy_value %copy : $Klass
  end_borrow %phi2 : $Wrapper2
  destroy_value %0 : $Wrapper2
  %t = tuple (%cast : $TStruct, %cast : $TStruct)
  return %t : $(TStruct, TStruct)
}

sil [ossa] @test_cycle1 : $@convention(thin) (@guaranteed Klass, @guaranteed Klass) -> () {
bb0(%0 : @guaranteed $Klass, %1 : @guaranteed $Klass):
  cond_br undef, bb1, bb2

bb1:
  %b0 = begin_borrow %0 : $Klass
  br bb3(%b0 : $Klass)

bb2:
  %b1 = begin_borrow %1 : $Klass
  br bb3(%b1 : $Klass)

bb3(%2 : @guaranteed $Klass):
  cond_br undef, bb4, bb5

bb4:
  end_borrow %2 : $Klass
  %b = begin_borrow %0 : $Klass
  br bb3(%b : $Klass)

bb5:
  end_borrow %2 : $Klass
  %999 = tuple ()
  return %999 : $()
}

sil [ossa] @test_cycle2 : $@convention(thin) (@owned Klass) -> () {
bb0(%0 : @owned $Klass):
  %b = begin_borrow %0 : $Klass
  br bb1(%b : $Klass)

bb1(%arg : @guaranteed $Klass):
  cond_br undef, bb2, bb3

bb2:
  br bb1(%arg : $Klass)

bb3:
  end_borrow %arg : $Klass
  destroy_value %0 : $Klass
  %9999 = tuple()
  return %9999 : $()
}

sil [ossa] @test_cycle3 : $@convention(thin) (@owned Klass) -> () {
bb0(%0 : @owned $Klass):
  %stk = alloc_stack $Klass
  store %0 to [init] %stk : $*Klass
  %ld1 = load_borrow %stk : $*Klass
  br bb1(%ld1 : $Klass)

bb1(%ld2 : @guaranteed $Klass):
  cond_br undef, bb2, bb3

bb2:
  br bb1(%ld2 : $Klass)

bb3:
  end_borrow %ld2 : $Klass
  destroy_addr %stk : $*Klass
  dealloc_stack %stk : $*Klass
  %9999 = tuple()
  return %9999 : $()
}

sil [ossa] @test_reborrow : $@convention(thin) (@owned Klass, @owned Klass) -> () {
bb0(%0 : @owned $Klass, %1 : @owned $Klass):
  cond_br undef, bb1, bb2

bb1:
  %b1 = begin_borrow %0 : $Klass
  br bb3(%b1 : $Klass)

bb2:
  %b2 = begin_borrow %0 : $Klass
  br bb3(%b2 : $Klass)

bb3(%2 : @guaranteed $Klass):
  end_borrow %2 : $Klass
  br bb4

bb4:
  destroy_value %0 : $Klass
  destroy_value %1 : $Klass
  %999 = tuple ()
  return %999 : $()
}

sil [ossa] @test_forwarded_separate_base_values : $@convention(thin) (@owned Wrapper1) -> () {
bb0(%0 : @owned $Wrapper1):
  %outer = begin_borrow %0 : $Wrapper1
  cond_br undef, bb1, bb2

bb1:
  %unrelated = begin_borrow %0 : $Wrapper1
  %ex1 = struct_extract %outer : $Wrapper1, #Wrapper1.val1
  br bb3(%ex1 : $Wrapper2, %unrelated : $Wrapper1)

bb2:
  %inner = begin_borrow %0 : $Wrapper1
  %ex2 = struct_extract %inner : $Wrapper1, #Wrapper1.val1
  br bb3(%ex2 : $Wrapper2, %inner : $Wrapper1)

bb3(%phi1 : @guaranteed $Wrapper2, %phi2 : @guaranteed $Wrapper1):
  %f = function_ref @use_wrapper2 : $@convention(thin) (@guaranteed Wrapper2) -> ()
  apply %f(%phi1) : $@convention(thin) (@guaranteed Wrapper2) -> ()
  end_borrow %phi2 : $Wrapper1
  end_borrow %outer : $Wrapper1
  destroy_value %0 : $Wrapper1
  %9999 = tuple()
  return %9999 : $()
}