// RUN: %target-sil-opt -enable-sil-verify-all %s -global-opt | %FileCheck %s
//
// ginit.cold has a hammock with an initializer call on the slow path.
// ginit.loop has a loop containing an initializer call.

sil_stage canonical


import Builtin
import Swift

// globalinit_token0
sil_global private @globalinit_token0 : $Builtin.Word
sil_global @MyConst : $Int32

// globalinit_func0
sil private @globalinit_func0 : $@convention(c) () -> () {
bb0:
  %0 = global_addr @MyConst : $*Int32               // user: %3
  %1 = integer_literal $Builtin.Int32, 0           // user: %2
  %2 = struct $Int32 (%1 : $Builtin.Int32)           // user: %3
  store %2 to %0 : $*Int32                          // id: %3
  %4 = tuple ()                                   // user: %5
  return %4 : $()                                 // id: %5
}

// ginit.MyConst.mutableAddressor : Swift.Int32
sil [global_init] @_TF5ginita7MyConstSi : $@convention(thin) () -> Builtin.RawPointer {
bb0:
  %1 = global_addr @globalinit_token0 : $*Builtin.Word // user: %2
  %2 = address_to_pointer %1 : $*Builtin.Word to $Builtin.RawPointer // user: %5
  // function_ref globalinit_func0
  %3 = function_ref @globalinit_func0 : $@convention(c) () -> () // user: %4
  %5 = builtin "once"(%2 : $Builtin.RawPointer, %3 : $@convention(c) () -> ()) : $()
  %6 = global_addr @MyConst : $*Int32               // user: %7
  %7 = address_to_pointer %6 : $*Int32 to $Builtin.RawPointer // user: %8
  return %7 : $Builtin.RawPointer                 // id: %8
}

// Don't hoist this initializer call.
// ginit.cold (Swift.Int32) -> Swift.Int32
// CHECK-LABEL: sil @_TF5ginit4coldFSiSi
// CHECK-NOT: 5ginita7MyConst
// CHECK: bb1:
// CHECK: 5ginita7MyConst
// CHECK: {{^bb2}}
sil @_TF5ginit4coldFSiSi : $@convention(thin) (Int32) -> Int32 {
bb0(%0 : $Int32):
  %1 = integer_literal $Builtin.Int32, 0           // users: %4, %5, %13
  %3 = struct_extract %0 : $Int32, #Int32._value       // user: %4
  %4 = builtin "cmp_sgt_Int32"(%3 : $Builtin.Int32, %1 : $Builtin.Int32) : $Builtin.Int1 // user: %5
  cond_br %4, bb1, bb2(%1 : $Builtin.Int32)        // id: %5

bb1:                                              // Preds: bb0
  // function_ref ginit.MyConst.mutableAddressor : Swift.Int32
  %6 = function_ref @_TF5ginita7MyConstSi : $@convention(thin) () -> Builtin.RawPointer // user: %7
  %7 = apply %6() : $@convention(thin) () -> Builtin.RawPointer // user: %8
  %8 = pointer_to_address %7 : $Builtin.RawPointer to [strict] $*Int32 // user: %9
  %9 = struct_element_addr %8 : $*Int32, #Int32._value // user: %10
  %10 = load %9 : $*Builtin.Int32                  // user: %13
  %12 = integer_literal $Builtin.Int1, -1         // user: %13
  %13 = builtin "sadd_with_overflow_Int32"(%1 : $Builtin.Int32, %10 : $Builtin.Int32, %12 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1) // user: %14
  %14 = tuple_extract %13 : $(Builtin.Int32, Builtin.Int1), 0 // user: %15
  br bb2(%14 : $Builtin.Int32)                     // id: %15

bb2(%16 : $Builtin.Int32):                         // Preds: bb0 bb1
  %17 = struct $Int32 (%16 : $Builtin.Int32)         // user: %18
  return %17 : $Int32                               // id: %18
}

// Do hoist this initializer call.
// ginit.loop (Swift.Int32) -> Swift.Int32
// CHECK-LABEL: sil @_TF5ginit4loopFSiSi
// CHECK: {{^bb0}}
// CHECK: 5ginita7MyConst
// CHECK: {{^bb1}}
// CHECK-NOT: 5ginita7MyConst
sil @_TF5ginit4loopFSiSi : $@convention(thin) (Int32) -> Int32 {
bb0(%0 : $Int32):
  %1 = integer_literal $Builtin.Int32, 0           // user: %8
  %2 = integer_literal $Builtin.Int32, 1           // users: %6, %8, %22
  %3 = struct_extract %0 : $Int32, #Int32._value       // user: %6
  %5 = integer_literal $Builtin.Int1, -1          // users: %6, %22, %37
  %6 = builtin "sadd_with_overflow_Int32"(%3 : $Builtin.Int32, %2 : $Builtin.Int32, %5 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1) // user: %7
  %7 = tuple_extract %6 : $(Builtin.Int32, Builtin.Int1), 0 // user: %13
  br bb1(%1 : $Builtin.Int32, %2 : $Builtin.Int32)  // id: %8

bb1(%9 : $Builtin.Int32, %10 : $Builtin.Int32):     // Preds: bb0 bb5
  %11 = struct $Int32 (%10 : $Builtin.Int32)         // user: %24
  %13 = builtin "cmp_eq_Int32"(%10 : $Builtin.Int32, %7 : $Builtin.Int32) : $Builtin.Int1 // user: %14
  cond_br %13, bb2, bb4                           // id: %14

bb2:                                              // Preds: bb1
  %15 = enum $Optional<Int32>, #Optional.none!enumelt // user: %16
  br bb3(%10 : $Builtin.Int32, %15 : $Optional<Int32>) // id: %16

bb3(%17 : $Builtin.Int32, %18 : $Optional<Int32>):   // Preds: bb2 bb4
  %19 = alloc_stack $Optional<Int32>                // users: %20, %26, %27, %40
  store %18 to %19 : $*Optional<Int32>            // id: %20
  switch_enum %18 : $Optional<Int32>, case #Optional.some!enumelt.1: bb5, case #Optional.none!enumelt: bb6 // id: %21

bb4:                                              // Preds: bb1
  %22 = builtin "sadd_with_overflow_Int32"(%10 : $Builtin.Int32, %2 : $Builtin.Int32, %5 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1) // user: %23
  %23 = tuple_extract %22 : $(Builtin.Int32, Builtin.Int1), 0 // user: %25
  %24 = enum $Optional<Int32>, #Optional.some!enumelt.1, %11 : $Int32 // user: %25
  br bb3(%23 : $Builtin.Int32, %24 : $Optional<Int32>) // id: %25

bb5:                                              // Preds: bb3
  %26 = unchecked_take_enum_data_addr %19 : $*Optional<Int32>, #Optional.some!enumelt.1
  dealloc_stack %19 : $*Optional<Int32> // id: %27
  %28 = alloc_stack $Optional<Int32>                // users: %29, %30, %31
  store %18 to %28 : $*Optional<Int32>            // id: %29
  %30 = unchecked_take_enum_data_addr %28 : $*Optional<Int32>, #Optional.some!enumelt.1
  dealloc_stack %28 : $*Optional<Int32> // id: %31
  // function_ref ginit.MyConst.mutableAddressor : Swift.Int32
  %32 = function_ref @_TF5ginita7MyConstSi : $@convention(thin) () -> Builtin.RawPointer // user: %33
  %33 = apply %32() : $@convention(thin) () -> Builtin.RawPointer // user: %34
  %34 = pointer_to_address %33 : $Builtin.RawPointer to [strict] $*Int32 // user: %35
  %35 = struct_element_addr %34 : $*Int32, #Int32._value // user: %36
  %36 = load %35 : $*Builtin.Int32                 // user: %37
  %37 = builtin "sadd_with_overflow_Int32"(%9 : $Builtin.Int32, %36 : $Builtin.Int32, %5 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1) // user: %38
  %38 = tuple_extract %37 : $(Builtin.Int32, Builtin.Int1), 0 // user: %39
  br bb1(%38 : $Builtin.Int32, %17 : $Builtin.Int32) // id: %39

bb6:                                              // Preds: bb3
  dealloc_stack %19 : $*Optional<Int32> // id: %40
  %41 = struct $Int32 (%9 : $Builtin.Int32)          // user: %42
  return %41 : $Int32                               // id: %42
}

// libg.MyGlobal.mutableAddressor : Swift.Int32
sil [global_init] @_TF4libga8MyGlobalSi : $@convention(thin) () -> Builtin.RawPointer

// Hoist this initializer call out of a loop, but not into the function entry.
// ginit.loop (Swift.Int32) -> Swift.Int32
// CHECK-LABEL: sil @_TF10ginitloops3runFSiSi
// CHECK: {{^bb2}}
// CHECK: function_ref @_TF4libga8MyGlobalSi
// CHECK-NEXT: apply
// CHECK: {{^bb6}}
// CHECK-NOT: addressor
// CHECK-NOT: mutableAddressor
// CHECK: pointer_to_address
// CHECK: {{br bb6}}
//
// ginitloops.run (Swift.Int32) -> Swift.Int32
sil @_TF10ginitloops3runFSiSi : $@convention(thin) (Int32) -> Int32 {
bb0(%0 : $Int32):
  %1 = integer_literal $Builtin.Int32, 1000        // user: %4
  %3 = struct_extract %0 : $Int32, #Int32._value       // users: %4, %16, %29
  %4 = builtin "cmp_sgt_Int32"(%3 : $Builtin.Int32, %1 : $Builtin.Int32) : $Builtin.Int1 // user: %5
  cond_br %4, bb1, bb2                            // id: %5

bb1:                                              // Preds: bb0
  %6 = integer_literal $Builtin.Int32, -1          // user: %7
  %7 = struct $Int32 (%6 : $Builtin.Int32)           // user: %8
  br bb9(%7 : $Int32)                               // id: %8

bb2:                                              // Preds: bb0
  %9 = integer_literal $Builtin.Int32, 0           // user: %11
  %10 = integer_literal $Builtin.Int32, 1          // users: %11, %22, %25, %34
  br bb3(%9 : $Builtin.Int32, %10 : $Builtin.Int32) // id: %11

bb3(%12 : $Builtin.Int32, %13 : $Builtin.Int32):    // Preds: bb2 bb7
  %14 = struct $Int32 (%13 : $Builtin.Int32)         // user: %24
  %16 = builtin "cmp_eq_Int32"(%13 : $Builtin.Int32, %3 : $Builtin.Int32) : $Builtin.Int1 // user: %17
  cond_br %16, bb4, bb5                           // id: %17

bb4:                                              // Preds: bb3
  %18 = struct $Int32 (%12 : $Builtin.Int32)         // user: %19
  br bb9(%18 : $Int32)                              // id: %19

bb5:                                              // Preds: bb3
  %21 = integer_literal $Builtin.Int1, -1         // user: %22
  %22 = builtin "sadd_with_overflow_Int32"(%13 : $Builtin.Int32, %10 : $Builtin.Int32, %21 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1) // user: %23
  %23 = tuple_extract %22 : $(Builtin.Int32, Builtin.Int1), 0 // user: %31
  %24 = enum $Optional<Int32>, #Optional.some!enumelt.1, %14 : $Int32
  br bb6(%12 : $Builtin.Int32, %10 : $Builtin.Int32) // id: %25

bb6(%26 : $Builtin.Int32, %27 : $Builtin.Int32):    // Preds: bb5 bb8
  %28 = struct $Int32 (%27 : $Builtin.Int32)         // user: %36
  %29 = builtin "cmp_eq_Int32"(%27 : $Builtin.Int32, %3 : $Builtin.Int32) : $Builtin.Int1 // user: %30
  cond_br %29, bb7, bb8                           // id: %30

bb7:                                              // Preds: bb6
  br bb3(%26 : $Builtin.Int32, %23 : $Builtin.Int32) // id: %31

bb8:                                              // Preds: bb6
  %33 = integer_literal $Builtin.Int1, -1         // user: %34
  %34 = builtin "sadd_with_overflow_Int32"(%27 : $Builtin.Int32, %10 : $Builtin.Int32, %33 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1) // user: %35
  %35 = tuple_extract %34 : $(Builtin.Int32, Builtin.Int1), 0 // user: %46
  %36 = enum $Optional<Int32>, #Optional.some!enumelt.1, %28 : $Int32
  // function_ref libg.MyGlobal.mutableAddressor : Swift.Int32
  %37 = function_ref @_TF4libga8MyGlobalSi : $@convention(thin) () -> Builtin.RawPointer // user: %38
  %38 = apply %37() : $@convention(thin) () -> Builtin.RawPointer // user: %39
  %39 = pointer_to_address %38 : $Builtin.RawPointer to [strict] $*Int32 // user: %40
  %40 = struct_element_addr %39 : $*Int32, #Int32._value // user: %41
  %41 = load %40 : $*Builtin.Int32                 // user: %44
  %43 = integer_literal $Builtin.Int1, -1         // user: %44
  %44 = builtin "sadd_with_overflow_Int32"(%26 : $Builtin.Int32, %41 : $Builtin.Int32, %43 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1) // user: %45
  %45 = tuple_extract %44 : $(Builtin.Int32, Builtin.Int1), 0 // user: %46
  br bb6(%45 : $Builtin.Int32, %35 : $Builtin.Int32) // id: %46

bb9(%47 : $Int32):                                  // Preds: bb1 bb4
  return %47 : $Int32                               // id: %48
}


// Do NOT hoist this initializer out of a cold block.
// CHECK-LABEL: sil @_TF9ginitcold3runFSiSi
// CHECK-NOT: addressor
// CHECK-NOT: mutableAddressor
// CHECK: {{^bb3}}
// CHECK: cond_br
// CHECK: {{^bb4}}
// CHECK: function_ref @_TF4libga8MyGlobalSi
// CHECK-NEXT: apply
// CHECK: pointer_to_address
// CHECK: br
sil @_TF9ginitcold3runFSiSi : $@convention(thin) (Int32) -> Int32 {
bb0(%0 : $Int32):
  %1 = integer_literal $Builtin.Int32, 0           // users: %4, %19
  %2 = integer_literal $Builtin.Int32, 1           // users: %4, %14
  %3 = struct_extract %0 : $Int32, #Int32._value       // user: %8
  br bb1(%1 : $Builtin.Int32, %2 : $Builtin.Int32)  // id: %4

bb1(%5 : $Builtin.Int32, %6 : $Builtin.Int32):      // Preds: bb0 bb5
  %8 = builtin "cmp_eq_Int32"(%6 : $Builtin.Int32, %3 : $Builtin.Int32) : $Builtin.Int1 // user: %9
  cond_br %8, bb2, bb3                            // id: %9

bb2:                                              // Preds: bb1
  %10 = struct $Int32 (%5 : $Builtin.Int32)          // user: %11
  return %10 : $Int32                               // id: %11

bb3:                                              // Preds: bb1
  %13 = integer_literal $Builtin.Int1, -1         // users: %14, %29
  %14 = builtin "sadd_with_overflow_Int32"(%6 : $Builtin.Int32, %2 : $Builtin.Int32, %13 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1) // user: %15
  %15 = tuple_extract %14 : $(Builtin.Int32, Builtin.Int1), 0 // user: %33
  %16 = integer_literal $Builtin.Int32, 10         // user: %18
  %18 = builtin "srem_Int32"(%5 : $Builtin.Int32, %16 : $Builtin.Int32) : $Builtin.Int32 // user: %19
  %19 = builtin "cmp_eq_Int32"(%18 : $Builtin.Int32, %1 : $Builtin.Int32) : $Builtin.Int1 // user: %22
  %20 = integer_literal $Builtin.Int1, 0          // user: %22
  %22 = builtin "int_expect_Int1"(%19 : $Builtin.Int1, %20 : $Builtin.Int1) : $Builtin.Int1 // user: %23
  cond_br %22, bb4, bb5(%5 : $Builtin.Int32)       // id: %23

bb4:                                              // Preds: bb3
  // function_ref libg.MyGlobal.mutableAddressor : Swift.Int32
  %24 = function_ref @_TF4libga8MyGlobalSi : $@convention(thin) () -> Builtin.RawPointer // user: %25
  %25 = apply %24() : $@convention(thin) () -> Builtin.RawPointer // user: %26
  %26 = pointer_to_address %25 : $Builtin.RawPointer to [strict] $*Int32 // user: %27
  %27 = struct_element_addr %26 : $*Int32, #Int32._value // user: %28
  %28 = load %27 : $*Builtin.Int32                 // user: %29
  %29 = builtin "sadd_with_overflow_Int32"(%5 : $Builtin.Int32, %28 : $Builtin.Int32, %13 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1) // user: %30
  %30 = tuple_extract %29 : $(Builtin.Int32, Builtin.Int1), 0 // user: %31
  br bb5(%30 : $Builtin.Int32)                     // id: %31

bb5(%32 : $Builtin.Int32):                         // Preds: bb3 bb4
  br bb1(%32 : $Builtin.Int32, %15 : $Builtin.Int32) // id: %33
}

// Combine two init calls into one in the common dominator
// CHECK-LABEL: sil @test_common_dominator
// CHECK: bb0(%0 : $Builtin.Int1):
// CHECK: apply
// CHECK: bb1:
// CHECK-NOT: apply
// CHECK: return
sil @test_common_dominator : $@convention(thin) (Builtin.Int1) -> Int64 {
bb0(%0 : $Builtin.Int1):
  %1 = function_ref @_TF4libga8MyGlobalSi : $@convention(thin) () -> Builtin.RawPointer
  %2 = apply %1() : $@convention(thin) () -> Builtin.RawPointer
  %3 = pointer_to_address %2 : $Builtin.RawPointer to [strict] $*Int64
  %4 = struct_element_addr %3 : $*Int64, #Int64._value
  %5 = load %4 : $*Builtin.Int64
  cond_br %0, bb1, bb2(%5 : $Builtin.Int64)

bb1:
  %8 = apply %1() : $@convention(thin) () -> Builtin.RawPointer
  %9 = pointer_to_address %8 : $Builtin.RawPointer to [strict] $*Int64
  %10 = struct_element_addr %9 : $*Int64, #Int64._value
  %11 = load %10 : $*Builtin.Int64
  br bb2(%11 : $Builtin.Int64)

bb2(%18 : $Builtin.Int64):
  %19 = struct $Int64 (%18 : $Builtin.Int64)
  return %19 : $Int64
}

// Combine two init calls into one in the common dominator
// CHECK-LABEL: sil @test_common_dominator2
// CHECK: bb0(%0 : $Builtin.Int1):
// CHECK: apply
// CHECK: bb1:
// CHECK-NOT: apply
// CHECK: return
sil @test_common_dominator2 : $@convention(thin) (Builtin.Int1) -> Int64 {
bb0(%0 : $Builtin.Int1):
  cond_br %0, bb1, bb2

bb1:
  %1 = function_ref @_TF4libga8MyGlobalSi : $@convention(thin) () -> Builtin.RawPointer
  %2 = apply %1() : $@convention(thin) () -> Builtin.RawPointer
  %3 = pointer_to_address %2 : $Builtin.RawPointer to [strict] $*Int64
  %4 = struct_element_addr %3 : $*Int64, #Int64._value
  %5 = load %4 : $*Builtin.Int64
  br bb3(%5 : $Builtin.Int64)

bb2:
  %11 = function_ref @_TF4libga8MyGlobalSi : $@convention(thin) () -> Builtin.RawPointer
  %12 = apply %11() : $@convention(thin) () -> Builtin.RawPointer
  %13 = pointer_to_address %12 : $Builtin.RawPointer to [strict] $*Int64
  %14 = struct_element_addr %13 : $*Int64, #Int64._value
  %15 = load %14 : $*Builtin.Int64
  br bb3(%15 : $Builtin.Int64)

bb3(%18 : $Builtin.Int64):
  %19 = struct $Int64 (%18 : $Builtin.Int64)
  return %19 : $Int64
}

// Test a special case: If there is a call in a loop and in its exit block, which is located
// before the loop, the init-call should still be hoisted out of the loop.
// CHECK-LABEL: sil @test_loopexit_and_loop
// CHECK: bb0(%0 : $Builtin.Int1):
// CHECK: apply
// CHECK: bb1:
// CHECK-NOT: apply
// CHECK: return
sil @test_loopexit_and_loop : $@convention(thin) (Builtin.Int1) -> Int64 {
bb0(%0 : $Builtin.Int1):
  br bb2

bb1:
  %1 = function_ref @_TF4libga8MyGlobalSi : $@convention(thin) () -> Builtin.RawPointer
  %2 = apply %1() : $@convention(thin) () -> Builtin.RawPointer
  %3 = pointer_to_address %2 : $Builtin.RawPointer to [strict] $*Int64
  %4 = struct_element_addr %3 : $*Int64, #Int64._value
  %5 = load %4 : $*Builtin.Int64
  %r1 = struct $Int64 (%5 : $Builtin.Int64)
  return %r1 : $Int64

bb2:
  %11 = function_ref @_TF4libga8MyGlobalSi : $@convention(thin) () -> Builtin.RawPointer
  %12 = apply %11() : $@convention(thin) () -> Builtin.RawPointer
  %13 = pointer_to_address %12 : $Builtin.RawPointer to [strict] $*Int64
  %14 = struct_element_addr %13 : $*Int64, #Int64._value
  %15 = load %14 : $*Builtin.Int64
  cond_br %0, bb2, bb1
}

// libg.MyGlobal.mutableAddressor : Swift.Int32
sil [global_init] [dynamically_replacable] @_TF4libga8MyGlobalSi_dynamic : $@convention(thin) () -> Builtin.RawPointer

// Don't hoist dynamic_function_ref calls.
// CHECK-LABEL: sil @test_loopexit_and_loop_dynamic
// CHECK: bb0(%0 : $Builtin.Int1):
// CHECK: bb1:
// CHECK: apply
// CHECK: return
// CHECK: bb2:
// CHECK: apply
// CHECK: cond_br
sil @test_loopexit_and_loop_dynamic : $@convention(thin) (Builtin.Int1) -> Int64 {
bb0(%0 : $Builtin.Int1):
  br bb2

bb1:
  %1 = dynamic_function_ref @_TF4libga8MyGlobalSi_dynamic : $@convention(thin) () -> Builtin.RawPointer
  %2 = apply %1() : $@convention(thin) () -> Builtin.RawPointer
  %3 = pointer_to_address %2 : $Builtin.RawPointer to [strict] $*Int64
  %4 = struct_element_addr %3 : $*Int64, #Int64._value
  %5 = load %4 : $*Builtin.Int64
  %r1 = struct $Int64 (%5 : $Builtin.Int64)
  return %r1 : $Int64

bb2:
  %11 = dynamic_function_ref @_TF4libga8MyGlobalSi_dynamic : $@convention(thin) () -> Builtin.RawPointer
  %12 = apply %11() : $@convention(thin) () -> Builtin.RawPointer
  %13 = pointer_to_address %12 : $Builtin.RawPointer to [strict] $*Int64
  %14 = struct_element_addr %13 : $*Int64, #Int64._value
  %15 = load %14 : $*Builtin.Int64
  cond_br %0, bb2, bb1
}
// An init-call, which is guarded by an availability-check may not be speculated.
// In this test it may not be hoisted out of the loop.
// CHECK-LABEL: sil @test_availability_loop
// CHECK: [[INIT:%[0-9]+]] = function_ref @_TF4libga8MyGlobalSi
// CHECK: {{^bb2:}}
// CHECK-NEXT: apply [[INIT]]()
sil @test_availability_loop : $@convention(thin) (Builtin.Int1) -> () {
bb0(%0 : $Builtin.Int1):
  %f1 = function_ref @test_availability : $@convention(thin) () -> Builtin.Int1
  %f2 = function_ref @_TF4libga8MyGlobalSi : $@convention(thin) () -> Builtin.RawPointer
  br bb1

bb1:
  %a1 = apply %f1() : $@convention(thin) () -> Builtin.Int1
  cond_br %a1, bb2, bb4

bb2:
  %a2 = apply %f2() : $@convention(thin) () -> Builtin.RawPointer
  br bb3

bb3:
  cond_br %0, bb1, bb4

bb4:
  %r = tuple ()
  return %r : $()
}

// The init-call should be hoisted out of the inner loop, but not out of the
// outer loop, because of the availability check around the inner loop.
// CHECK-LABEL: sil @test_availability_loop_nest
// CHECK: [[INIT:%[0-9]+]] = function_ref @_TF4libga8MyGlobalSi
// CHECK: {{^bb2:}}
// CHECK-NEXT: apply [[INIT]]()
sil @test_availability_loop_nest : $@convention(thin) (Builtin.Int1) -> () {
bb0(%0 : $Builtin.Int1):
  %f1 = function_ref @test_availability : $@convention(thin) () -> Builtin.Int1
  %f2 = function_ref @_TF4libga8MyGlobalSi : $@convention(thin) () -> Builtin.RawPointer
  br bb1

bb1:
  %a1 = apply %f1() : $@convention(thin) () -> Builtin.Int1
  cond_br %a1, bb2, bb4

bb2:
  br bb3

bb3:
  %a2 = apply %f2() : $@convention(thin) () -> Builtin.RawPointer
  cond_br %0, bb3, bb4

bb4:
  cond_br %0, bb1, bb5

bb5:
  %r = tuple ()
  return %r : $()
}

// The init-calls may not be moved to their common dominator because of
// availability guards.
// CHECK-LABEL: sil @test_availability_common_dominator
// CHECK: [[INIT:%[0-9]+]] = function_ref @_TF4libga8MyGlobalSi
// CHECK: {{^bb2:}}
// CHECK-NEXT: apply [[INIT]]()
// CHECK: {{^bb4:}}
// CHECK-NEXT: apply [[INIT]]()
sil @test_availability_common_dominator : $@convention(thin) (Builtin.Int1) -> () {
bb0(%0 : $Builtin.Int1):
  %f1 = function_ref @test_availability : $@convention(thin) () -> Builtin.Int1
  %f2 = function_ref @_TF4libga8MyGlobalSi : $@convention(thin) () -> Builtin.RawPointer
  cond_br %0, bb1, bb3

bb1:
  %a1 = apply %f1() : $@convention(thin) () -> Builtin.Int1
  cond_br %a1, bb2, bb5

bb2:
  %a2 = apply %f2() : $@convention(thin) () -> Builtin.RawPointer
  br bb5

bb3:
  %a3 = apply %f1() : $@convention(thin) () -> Builtin.Int1
  cond_br %0, bb4, bb5

bb4:
  %a4 = apply %f2() : $@convention(thin) () -> Builtin.RawPointer
  br bb5

bb5:
  %r = tuple ()
  return %r : $()
}

sil [_semantics "availability.test"] @test_availability : $@convention(thin) () -> Builtin.Int1