File: cropoverflow.sil

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file content (796 lines) | stat: -rw-r--r-- 42,814 bytes
// RUN: %target-sil-opt -enable-sil-verify-all %s -remove-redundant-overflow-checks | %FileCheck %s

sil_stage canonical

import Builtin
import Swift
import SwiftShims

sil [noinline] @sink_unsigned_int : $@convention(thin) () -> ()
sil [noinline] @sink_signed_int : $@convention(thin) () -> ()

// CHECK-LABEL: @sub_signed_branch_cond
sil hidden @sub_signed_branch_cond : $@convention(thin) (Int64) -> () {
bb0(%0 : $Int64):
  %1 = integer_literal $Builtin.Int64, 2          // users: %3, %12
  %2 = struct_extract %0 : $Int64, #Int64._value       // users: %3, %7, %12, %17
  %3 = builtin "cmp_slt_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64) : $Builtin.Int1 // user: %4
  cond_br %3, bb2, bb1                            // id: %4

bb1:                                              // Preds: bb0
  %5 = integer_literal $Builtin.Int64, 1          // user: %7
  %6 = integer_literal $Builtin.Int1, -1          // users: %7, %12, %17
  %7 = builtin "ssub_with_overflow_Int64"(%2 : $Builtin.Int64, %5 : $Builtin.Int64, %6 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %8
  %8 = tuple_extract %7 : $(Builtin.Int64, Builtin.Int1), 1 // user: %9
// CHECK-NOT: cond_fail
  cond_fail %8 : $Builtin.Int1                    // id: %9
  %10 = function_ref @sink_unsigned_int : $@convention(thin) () -> () // users: %11, %15, %20
  %11 = apply %10() : $@convention(thin) () -> ()
  %12 = builtin "ssub_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %6 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %13
  %13 = tuple_extract %12 : $(Builtin.Int64, Builtin.Int1), 1 // user: %14
// CHECK-NOT: cond_fail
  cond_fail %13 : $Builtin.Int1                   // id: %14
  %15 = apply %10() : $@convention(thin) () -> ()

// CHECK that we do not remove the '3' because it is not guarder by the branch.
// CHECK: integer_literal $Builtin.Int64, 3
// CHECK: cond_fail
  %16 = integer_literal $Builtin.Int64, 3         // user: %17
  %17 = builtin "ssub_with_overflow_Int64"(%2 : $Builtin.Int64, %16 : $Builtin.Int64, %6 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %18
  %18 = tuple_extract %17 : $(Builtin.Int64, Builtin.Int1), 1 // user: %19
  cond_fail %18 : $Builtin.Int1                   // id: %19
  %20 = apply %10() : $@convention(thin) () -> ()
  br bb3                                          // id: %21

bb2:
  br bb3

bb3:
  %22 = tuple ()                                  // user: %23
// CHECK: return
  return %22 : $()                                // id: %23
}

// CHECK-LABEL: @sub_signed_branch_cond2
// CHECK-NOT: cond_fail
// CHECK: return
sil hidden @sub_signed_branch_cond2: $@convention(thin) (Int64) -> () {
bb0(%0 : $Int64):
  %1 = integer_literal $Builtin.Int64, 2          // users: %3, %12
  %2 = struct_extract %0 : $Int64, #Int64._value       // users: %3, %7, %12, %17
  %3 = builtin "cmp_sge_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64) : $Builtin.Int1 // user: %4
  cond_br %3, bb1, bb2                            // id: %4

bb1:                                              // Preds: bb0
  %5 = integer_literal $Builtin.Int64, 1          // user: %7
  %6 = integer_literal $Builtin.Int1, -1          // users: %7, %12, %17
  %7 = builtin "ssub_with_overflow_Int64"(%2 : $Builtin.Int64, %5 : $Builtin.Int64, %6 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %8
  %8 = tuple_extract %7 : $(Builtin.Int64, Builtin.Int1), 1 // user: %9
  cond_fail %8 : $Builtin.Int1                    // id: %9
  %10 = function_ref @sink_unsigned_int : $@convention(thin) () -> () // users: %11, %15, %20
  %11 = apply %10() : $@convention(thin) () -> ()
  %12 = builtin "ssub_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %6 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %13
  %13 = tuple_extract %12 : $(Builtin.Int64, Builtin.Int1), 1 // user: %14
  cond_fail %13 : $Builtin.Int1                   // id: %14
  %15 = apply %10() : $@convention(thin) () -> ()
  %16 = integer_literal $Builtin.Int64, 3         // user: %17
  %17 = builtin "ssub_with_overflow_Int64"(%2 : $Builtin.Int64, %16 : $Builtin.Int64, %6 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %18
  %18 = tuple_extract %17 : $(Builtin.Int64, Builtin.Int1), 1 // user: %19
  cond_fail %13 : $Builtin.Int1                   // id: %19
  %20 = apply %10() : $@convention(thin) () -> ()
  br bb3                                          // id: %21

bb2:
  br bb3

bb3:
  %22 = tuple ()                                  // user: %23
  return %22 : $()                                // id: %23
}

// CHECK-LABEL: @sub_unsigned_branch_cond
// CHECK-NOT: cond_fail
// CHECK: return
sil hidden @sub_unsigned_branch_cond : $@convention(thin) (UInt64) -> () {
bb0(%0 : $UInt64):
  %1 = integer_literal $Builtin.Int64, 2          // users: %3, %12
  %2 = struct_extract %0 : $UInt64, #UInt64._value     // users: %3, %7, %12, %17
  %3 = builtin "cmp_ult_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64) : $Builtin.Int1 // user: %4
  cond_br %3, bb2, bb1                            // id: %4

bb1:                                              // Preds: bb0
  %5 = integer_literal $Builtin.Int64, 1          // user: %7
  %6 = integer_literal $Builtin.Int1, -1          // users: %7, %12, %17
  %7 = builtin "usub_with_overflow_Int64"(%2 : $Builtin.Int64, %5 : $Builtin.Int64, %6 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %8
  %8 = tuple_extract %7 : $(Builtin.Int64, Builtin.Int1), 1 // user: %9
  cond_fail %8 : $Builtin.Int1                    // id: %9
  %10 = function_ref @sink_signed_int : $@convention(thin) () -> () // users: %11, %15, %20
  %11 = apply %10() : $@convention(thin) () -> ()
  %12 = builtin "usub_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %6 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %13
  %13 = tuple_extract %12 : $(Builtin.Int64, Builtin.Int1), 1 // user: %14
  cond_fail %13 : $Builtin.Int1                   // id: %14
  %15 = apply %10() : $@convention(thin) () -> ()
  %16 = integer_literal $Builtin.Int64, 3         // user: %17
  %17 = builtin "usub_with_overflow_Int64"(%2 : $Builtin.Int64, %16 : $Builtin.Int64, %6 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %18
  %18 = tuple_extract %17 : $(Builtin.Int64, Builtin.Int1), 1 // user: %19
  cond_fail %13 : $Builtin.Int1                   // id: %19
  %20 = apply %10() : $@convention(thin) () -> ()
  br bb3                                          // id: %21

bb2:
  br bb3

bb3:                                              // Preds: bb0 bb1
  %22 = tuple ()                                  // user: %23
  return %22 : $()                                // id: %23
}

// CHECK-LABEL: @sub_unsigned_branch_cond2
// CHECK-NOT: cond_fail
// CHECK: return
sil hidden @sub_unsigned_branch_cond2 : $@convention(thin) (UInt64) -> () {
bb0(%0 : $UInt64):
  %1 = integer_literal $Builtin.Int64, 2          // users: %3, %12
  %2 = struct_extract %0 : $UInt64, #UInt64._value     // users: %3, %7, %12, %17
  %3 = builtin "cmp_uge_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64) : $Builtin.Int1 // user: %4
  cond_br %3, bb1, bb2                            // id: %4

bb1:                                              // Preds: bb0
  %5 = integer_literal $Builtin.Int64, 1          // user: %7
  %6 = integer_literal $Builtin.Int1, -1          // users: %7, %12, %17
  %7 = builtin "usub_with_overflow_Int64"(%2 : $Builtin.Int64, %5 : $Builtin.Int64, %6 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %8
  %8 = tuple_extract %7 : $(Builtin.Int64, Builtin.Int1), 1 // user: %9
  cond_fail %8 : $Builtin.Int1                    // id: %9
  %10 = function_ref @sink_signed_int : $@convention(thin) () -> () // users: %11, %15, %20
  %11 = apply %10() : $@convention(thin) () -> ()
  %12 = builtin "usub_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %6 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %13
  %13 = tuple_extract %12 : $(Builtin.Int64, Builtin.Int1), 1 // user: %14
  cond_fail %13 : $Builtin.Int1                   // id: %14
  %15 = apply %10() : $@convention(thin) () -> ()
  %16 = integer_literal $Builtin.Int64, 3         // user: %17
  %17 = builtin "usub_with_overflow_Int64"(%2 : $Builtin.Int64, %16 : $Builtin.Int64, %6 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %18
  %18 = tuple_extract %17 : $(Builtin.Int64, Builtin.Int1), 1 // user: %19
  cond_fail %13 : $Builtin.Int1                   // id: %19
  %20 = apply %10() : $@convention(thin) () -> ()
  br bb3                                          // id: %21

bb2:                                              // Preds: bb0 bb1
  br bb3

bb3:
  %22 = tuple ()                                  // user: %23
  return %22 : $()                                // id: %23
}

// CHECK-LABEL: @unsigned_sub_previous_traps
// Keep the first cond-fail
// CHECK: cond_fail
// Keep the condfail with +10 because it is not guarded by the first condfail (+9)
// CHECK: cond_fail
// CHECK-NOT: cond_fail
// CHECK: return
sil hidden @unsigned_sub_previous_traps : $@convention(thin) (UInt64) -> () {
bb0(%0 : $UInt64):
  %1 = integer_literal $Builtin.Int64, 9          // user: %4
  %2 = struct_extract %0 : $UInt64, #UInt64._value     // users: %4, %10, %15, %20, %25
  %3 = integer_literal $Builtin.Int1, -1          // users: %4, %10, %15, %20, %25
  %4 = builtin "usub_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %5
  %5 = tuple_extract %4 : $(Builtin.Int64, Builtin.Int1), 1 // user: %6
  cond_fail %5 : $Builtin.Int1                    // id: %6
  %7 = function_ref @sink_signed_int : $@convention(thin) () -> () // users: %8, %13, %18, %23, %28, %29
  %8 = apply %7() : $@convention(thin) () -> ()
  %9 = integer_literal $Builtin.Int64, 2          // user: %10
  %10 = builtin "usub_with_overflow_Int64"(%2 : $Builtin.Int64, %9 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %11
  %11 = tuple_extract %10 : $(Builtin.Int64, Builtin.Int1), 1 // user: %12
  cond_fail %11 : $Builtin.Int1                   // id: %12
  %13 = apply %7() : $@convention(thin) () -> ()
  %14 = integer_literal $Builtin.Int64, 3         // user: %15
  %15 = builtin "usub_with_overflow_Int64"(%2 : $Builtin.Int64, %14 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %16
  %16 = tuple_extract %15 : $(Builtin.Int64, Builtin.Int1), 1 // user: %17
  cond_fail %16 : $Builtin.Int1                   // id: %17
  %18 = apply %7() : $@convention(thin) () -> ()
  %19 = integer_literal $Builtin.Int64, 5         // user: %20
  %20 = builtin "usub_with_overflow_Int64"(%2 : $Builtin.Int64, %19 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %21
  %21 = tuple_extract %20 : $(Builtin.Int64, Builtin.Int1), 1 // user: %22
  cond_fail %21 : $Builtin.Int1                   // id: %22
  %23 = apply %7() : $@convention(thin) () -> ()
  %24 = integer_literal $Builtin.Int64, 10        // user: %25
  %25 = builtin "usub_with_overflow_Int64"(%2 : $Builtin.Int64, %24 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %26
  %26 = tuple_extract %25 : $(Builtin.Int64, Builtin.Int1), 1 // user: %27
  cond_fail %26 : $Builtin.Int1                   // id: %27
  %28 = apply %7() : $@convention(thin) () -> ()
  %29 = apply %7() : $@convention(thin) () -> ()
  %30 = tuple ()                                  // user: %31
  return %30 : $()                                // id: %31
}

// CHECK-LABEL: @signed_sub_previous_traps
sil hidden @signed_sub_previous_traps : $@convention(thin) (Int64) -> () {
bb0(%0 : $Int64):
  %1 = integer_literal $Builtin.Int64, 9          // user: %4
  %2 = struct_extract %0 : $Int64, #Int64._value       // users: %4, %10, %15, %20, %25
  %3 = integer_literal $Builtin.Int1, -1          // users: %4, %10, %15, %20, %25
  %4 = builtin "ssub_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %5
  %5 = tuple_extract %4 : $(Builtin.Int64, Builtin.Int1), 1 // user: %6
// Keep this condfail because it is the first one.
// CHECK: cond_fail
  cond_fail %5 : $Builtin.Int1                    // id: %6
  %7 = function_ref @sink_unsigned_int : $@convention(thin) () -> () // users: %8, %13, %18, %23, %28, %29
  %8 = apply %7() : $@convention(thin) () -> ()
  %9 = integer_literal $Builtin.Int64, 2          // user: %10
  %10 = builtin "ssub_with_overflow_Int64"(%2 : $Builtin.Int64, %9 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %11
  %11 = tuple_extract %10 : $(Builtin.Int64, Builtin.Int1), 1 // user: %12
  cond_fail %11 : $Builtin.Int1                   // id: %12
  %13 = apply %7() : $@convention(thin) () -> ()
  %14 = integer_literal $Builtin.Int64, 3         // user: %15
  %15 = builtin "ssub_with_overflow_Int64"(%2 : $Builtin.Int64, %14 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %16
  %16 = tuple_extract %15 : $(Builtin.Int64, Builtin.Int1), 1 // user: %17
  cond_fail %16 : $Builtin.Int1                   // id: %17
  %18 = apply %7() : $@convention(thin) () -> ()
  %19 = integer_literal $Builtin.Int64, 5         // user: %20
  %20 = builtin "ssub_with_overflow_Int64"(%2 : $Builtin.Int64, %19 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %21
  %21 = tuple_extract %20 : $(Builtin.Int64, Builtin.Int1), 1 // user: %22
  cond_fail %21 : $Builtin.Int1                   // id: %22
  %23 = apply %7() : $@convention(thin) () -> ()
  %24 = integer_literal $Builtin.Int64, 10        // user: %25
  %25 = builtin "ssub_with_overflow_Int64"(%2 : $Builtin.Int64, %24 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %26
  %26 = tuple_extract %25 : $(Builtin.Int64, Builtin.Int1), 1 // user: %27
// Keep this condfail because it is not in the guarded range.
// CHECK: cond_fail
  cond_fail %26 : $Builtin.Int1                   // id: %27
  %28 = apply %7() : $@convention(thin) () -> ()
  %29 = apply %7() : $@convention(thin) () -> ()
  %30 = tuple ()                                  // user: %31
// CHECK-NOT: cond_fail
// CHECK: return
  return %30 : $()                                // id: %31
}

// CHECK-LABEL: @unsigned_add_previous_traps
sil hidden @unsigned_add_previous_traps : $@convention(thin) (UInt64) -> () {
bb0(%0 : $UInt64):
  %1 = integer_literal $Builtin.Int64, 9          // user: %4
  %2 = struct_extract %0 : $UInt64, #UInt64._value     // users: %4, %10, %15, %20, %25
  %3 = integer_literal $Builtin.Int1, -1          // users: %4, %10, %15, %20, %25
  %4 = builtin "uadd_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %5
  %5 = tuple_extract %4 : $(Builtin.Int64, Builtin.Int1), 1 // user: %6
// Keep the first condfail.
//CHECK: cond_fail
  cond_fail %5 : $Builtin.Int1                    // id: %6
  %7 = function_ref @sink_signed_int : $@convention(thin) () -> () // users: %8, %13, %18, %23, %28, %29
  %8 = apply %7() : $@convention(thin) () -> ()
  %9 = integer_literal $Builtin.Int64, 2          // user: %10
  %10 = builtin "uadd_with_overflow_Int64"(%2 : $Builtin.Int64, %9 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %11
  %11 = tuple_extract %10 : $(Builtin.Int64, Builtin.Int1), 1 // user: %12
  cond_fail %11 : $Builtin.Int1                   // id: %12
  %13 = apply %7() : $@convention(thin) () -> ()
  %14 = integer_literal $Builtin.Int64, 3         // user: %15
  %15 = builtin "uadd_with_overflow_Int64"(%2 : $Builtin.Int64, %14 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %16
  %16 = tuple_extract %15 : $(Builtin.Int64, Builtin.Int1), 1 // user: %17
  cond_fail %16 : $Builtin.Int1                   // id: %17
  %18 = apply %7() : $@convention(thin) () -> ()
  %19 = integer_literal $Builtin.Int64, 5         // user: %20
  %20 = builtin "uadd_with_overflow_Int64"(%2 : $Builtin.Int64, %19 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %21
  %21 = tuple_extract %20 : $(Builtin.Int64, Builtin.Int1), 1 // user: %22
  cond_fail %21 : $Builtin.Int1                   // id: %22
  %23 = apply %7() : $@convention(thin) () -> ()
  %24 = integer_literal $Builtin.Int64, 10        // user: %25
  %25 = builtin "uadd_with_overflow_Int64"(%2 : $Builtin.Int64, %24 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %26
  %26 = tuple_extract %25 : $(Builtin.Int64, Builtin.Int1), 1 // user: %27
// Keep the out-of-range condfail.
//CHECK: cond_fail
  cond_fail %26 : $Builtin.Int1                   // id: %27
  %28 = apply %7() : $@convention(thin) () -> ()
  %29 = apply %7() : $@convention(thin) () -> ()
  %30 = tuple ()                                  // user: %31
// CHECK-NOT: cond_fail
// CHECK: return
  return %30 : $()                                // id: %31
}

// CHECK-LABEL: @signed_add_previous_traps
// Keep the first condfail
// CHECK: cond_fail
// Keep out-of-range condfail
// CHECK: cond_fail
// CHECK-NOT: cond_fail
// CHECK: return
sil hidden @signed_add_previous_traps : $@convention(thin) (Int64) -> () {
bb0(%0 : $Int64):
  %1 = integer_literal $Builtin.Int64, 9          // user: %4
  %2 = struct_extract %0 : $Int64, #Int64._value       // users: %4, %10, %15, %20, %25
  %3 = integer_literal $Builtin.Int1, -1          // users: %4, %10, %15, %20, %25
  %4 = builtin "sadd_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %5
  %5 = tuple_extract %4 : $(Builtin.Int64, Builtin.Int1), 1 // user: %6
  cond_fail %5 : $Builtin.Int1                    // id: %6
  %7 = function_ref @sink_unsigned_int : $@convention(thin) () -> () // users: %8, %13, %18, %23, %28, %29
  %8 = apply %7() : $@convention(thin) () -> ()
  %9 = integer_literal $Builtin.Int64, 2          // user: %10
  %10 = builtin "sadd_with_overflow_Int64"(%2 : $Builtin.Int64, %9 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %11
  %11 = tuple_extract %10 : $(Builtin.Int64, Builtin.Int1), 1 // user: %12
  cond_fail %11 : $Builtin.Int1                   // id: %12
  %13 = apply %7() : $@convention(thin) () -> ()
  %14 = integer_literal $Builtin.Int64, 3         // user: %15
  %15 = builtin "sadd_with_overflow_Int64"(%2 : $Builtin.Int64, %14 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %16
  %16 = tuple_extract %15 : $(Builtin.Int64, Builtin.Int1), 1 // user: %17
  cond_fail %16 : $Builtin.Int1                   // id: %17
  %18 = apply %7() : $@convention(thin) () -> ()
  %19 = integer_literal $Builtin.Int64, 5         // user: %20
  %20 = builtin "sadd_with_overflow_Int64"(%2 : $Builtin.Int64, %19 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %21
  %21 = tuple_extract %20 : $(Builtin.Int64, Builtin.Int1), 1 // user: %22
  cond_fail %21 : $Builtin.Int1                   // id: %22
  %23 = apply %7() : $@convention(thin) () -> ()
  %24 = integer_literal $Builtin.Int64, 10        // user: %25
  %25 = builtin "sadd_with_overflow_Int64"(%2 : $Builtin.Int64, %24 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %26
  %26 = tuple_extract %25 : $(Builtin.Int64, Builtin.Int1), 1 // user: %27
  cond_fail %26 : $Builtin.Int1                   // id: %27
  %28 = apply %7() : $@convention(thin) () -> ()
  %29 = apply %7() : $@convention(thin) () -> ()
  %30 = tuple ()                                  // user: %31
  return %30 : $()                                // id: %31
}

// CHECK-LABEL: @add1_signed_branch
// CHECK-NOT: cond_fail
// CHECK: return
sil hidden @add1_signed_branch : $@convention(thin) (Int64, Int64) -> () {
bb0(%0 : $Int64, %1 : $Int64):
  %2 = struct_extract %0 : $Int64, #Int64._value       // users: %4, %8, %14
  %3 = struct_extract %1 : $Int64, #Int64._value       // user: %4
  %4 = builtin "cmp_slt_Int64"(%2 : $Builtin.Int64, %3 : $Builtin.Int64) : $Builtin.Int1 // user: %5
  cond_br %4, bb1, bb2                            // id: %5

bb1:                                              // Preds: bb0
  %6 = integer_literal $Builtin.Int64, 1          // user: %8
  %7 = integer_literal $Builtin.Int1, -1          // users: %8, %14
  %8 = builtin "sadd_with_overflow_Int64"(%2 : $Builtin.Int64, %6 : $Builtin.Int64, %7 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %9
  %9 = tuple_extract %8 : $(Builtin.Int64, Builtin.Int1), 1 // user: %10
  cond_fail %9 : $Builtin.Int1                    // id: %10
  %11 = function_ref @sink_unsigned_int : $@convention(thin) () -> () // users: %12, %17
  %12 = apply %11() : $@convention(thin) () -> ()
  %13 = integer_literal $Builtin.Int64, 2         // user: %14
  %14 = builtin "sadd_with_overflow_Int64"(%2 : $Builtin.Int64, %13 : $Builtin.Int64, %7 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %15
  %15 = tuple_extract %14 : $(Builtin.Int64, Builtin.Int1), 1 // user: %16
  cond_fail %9 : $Builtin.Int1                   // id: %16
  %17 = apply %11() : $@convention(thin) () -> ()
  br bb3                                          // id: %18

bb2:
  br bb3

bb3:
  %19 = tuple ()                                  // user: %20
  return %19 : $()                                // id: %20
}

// CHECK-LABEL: @add1_unsigned_branch
// CHECK-NOT: cond_fail
// CHECK: return
sil hidden @add1_unsigned_branch : $@convention(thin) (UInt64, UInt64) -> () {
bb0(%0 : $UInt64, %1 : $UInt64):
  %2 = struct_extract %0 : $UInt64, #UInt64._value     // users: %4, %8, %14
  %3 = struct_extract %1 : $UInt64, #UInt64._value     // user: %4
  %4 = builtin "cmp_ult_Int64"(%2 : $Builtin.Int64, %3 : $Builtin.Int64) : $Builtin.Int1 // user: %5
  cond_br %4, bb1, bb2                            // id: %5

bb1:                                              // Preds: bb0
  %6 = integer_literal $Builtin.Int64, 1          // user: %8
  %7 = integer_literal $Builtin.Int1, -1          // users: %8, %14
  %8 = builtin "uadd_with_overflow_Int64"(%2 : $Builtin.Int64, %6 : $Builtin.Int64, %7 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %9
  %9 = tuple_extract %8 : $(Builtin.Int64, Builtin.Int1), 1 // user: %10
  cond_fail %9 : $Builtin.Int1                    // id: %10
  %11 = function_ref @sink_signed_int : $@convention(thin) () -> () // users: %12, %17
  %12 = apply %11() : $@convention(thin) () -> ()
  %13 = integer_literal $Builtin.Int64, 2         // user: %14
  %14 = builtin "uadd_with_overflow_Int64"(%2 : $Builtin.Int64, %13 : $Builtin.Int64, %7 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %15
  %15 = tuple_extract %14 : $(Builtin.Int64, Builtin.Int1), 1 // user: %16
  cond_fail %9 : $Builtin.Int1                   // id: %16
  %17 = apply %11() : $@convention(thin) () -> ()
  br bb3                                          // id: %18

bb2:
  br bb3

bb3:
  %19 = tuple ()                                  // user: %20
  return %19 : $()                                // id: %20
}

// CHECK-LABEL: @remove_past_checks
sil hidden @remove_past_checks : $@convention(thin) (Int64) -> () {
bb0(%0 : $Int64):
  %1 = integer_literal $Builtin.Int64, 1          // user: %4
  %2 = struct_extract %0 : $Int64, #Int64._value       // users: %4, %8, %12, %16, %20
  %3 = integer_literal $Builtin.Int1, -1          // users: %4, %8, %12, %16, %20
// CHECK: sadd_with_overflow_Int64
  %4 = builtin "sadd_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %5
  %5 = tuple_extract %4 : $(Builtin.Int64, Builtin.Int1), 1 // user: %6
// CHECK-NOT: cond_fail
  cond_fail %5 : $Builtin.Int1                    // id: %6
  %7 = integer_literal $Builtin.Int64, 2          // user: %8
// CHECK: sadd_with_overflow_Int64
  %8 = builtin "sadd_with_overflow_Int64"(%2 : $Builtin.Int64, %7 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %9
  %9 = tuple_extract %8 : $(Builtin.Int64, Builtin.Int1), 1 // user: %10
// CHECK-NOT: cond_fail
  cond_fail %9 : $Builtin.Int1                    // id: %10
  %11 = integer_literal $Builtin.Int64, 3         // user: %12
// CHECK: sadd_with_overflow_Int64
  %12 = builtin "sadd_with_overflow_Int64"(%2 : $Builtin.Int64, %11 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %13
  %13 = tuple_extract %12 : $(Builtin.Int64, Builtin.Int1), 1 // user: %14
// CHECK-NOT: cond_fail
  cond_fail %13 : $Builtin.Int1                   // id: %14
  %15 = integer_literal $Builtin.Int64, 4         // user: %16
// CHECK: sadd_with_overflow_Int64
  %16 = builtin "sadd_with_overflow_Int64"(%2 : $Builtin.Int64, %15 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %17
  %17 = tuple_extract %16 : $(Builtin.Int64, Builtin.Int1), 1 // user: %18
// CHECK-NOT: cond_fail
  cond_fail %17 : $Builtin.Int1                   // id: %18
  %19 = integer_literal $Builtin.Int64, 5         // user: %20
// CHECK: sadd_with_overflow_Int64
  %20 = builtin "sadd_with_overflow_Int64"(%2 : $Builtin.Int64, %19 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %21
  %21 = tuple_extract %20 : $(Builtin.Int64, Builtin.Int1), 1 // user: %22
// We keep the last cond-fail, which is enough to guard all the others.
// CHECK: cond_fail
  cond_fail %21 : $Builtin.Int1                   // id: %22
  %23 = tuple ()                                  // user: %24
// CHECK: return
  return %23 : $()                                // id: %24
}


// Make sure we are not crashing on this one (and that we are not removing the condfails)
// This comes from the following test:
//func foo(x : Int64, y : Int8) {
//  3 + x
//  2 + y
//}
// CHECK-LABEL: @bitwidth_crash
// CHECK: cond_fail
// CHECK: cond_fail
// CHECK: return
sil hidden @bitwidth_crash : $@convention(thin) (Int64, Int8) -> () {
bb0(%0 : $Int64, %1 : $Int8):
  %2 = integer_literal $Builtin.Int64, 3          // user: %5
  %3 = struct_extract %0 : $Int64, #Int64._value       // user: %5
  %4 = integer_literal $Builtin.Int1, -1          // users: %5, %10
  %5 = builtin "sadd_with_overflow_Int64"(%2 : $Builtin.Int64, %3 : $Builtin.Int64, %4 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %6
  %6 = tuple_extract %5 : $(Builtin.Int64, Builtin.Int1), 1 // user: %7
  cond_fail %6 : $Builtin.Int1                    // id: %7
  %8 = integer_literal $Builtin.Int8, 2           // user: %10
  %9 = struct_extract %1 : $Int8, #Int8._value     // user: %10
  %10 = builtin "sadd_with_overflow_Int8"(%8 : $Builtin.Int8, %9 : $Builtin.Int8, %4 : $Builtin.Int1) : $(Builtin.Int8, Builtin.Int1) // user: %11
  %11 = tuple_extract %10 : $(Builtin.Int8, Builtin.Int1), 1 // user: %12
  cond_fail %11 : $Builtin.Int1                   // id: %12
  %13 = tuple ()                                  // user: %14
  return %13 : $()                                // id: %14
}

// CHECK-LABEL: @signed_cmpeq_sub
// CHECK-NOT: cond_fail
// CHECK: return
sil hidden @signed_cmpeq_sub : $@convention(thin) (Int64) -> () {
bb0(%0 : $Int64):
  %1 = integer_literal $Builtin.Int64, 3          // users: %3, %12
  %2 = struct_extract %0 : $Int64, #Int64._value       // users: %3, %7, %12
  %3 = builtin "cmp_ne_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64) : $Builtin.Int1 // user: %4
  cond_br %3, bb1, bb2                            // id: %4

bb1:                                              // Preds: bb0
  %5 = integer_literal $Builtin.Int64, 999        // user: %7
  %6 = integer_literal $Builtin.Int1, -1          // user: %7
  %7 = builtin "sadd_with_overflow_Int64"(%2 : $Builtin.Int64, %5 : $Builtin.Int64, %6 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %8
  %8 = tuple_extract %7 : $(Builtin.Int64, Builtin.Int1), 1 // user: %9
  %9 = tuple_extract %7 : $(Builtin.Int64, Builtin.Int1), 1 // user: %9
  br bb3                                          // id: %10

bb2:                                              // Preds: bb0
  %11 = integer_literal $Builtin.Int1, -1         // user: %12
  %12 = builtin "ssub_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %11 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %13
  %13 = tuple_extract %12 : $(Builtin.Int64, Builtin.Int1), 1 // user: %14
  cond_fail %13 : $Builtin.Int1                   // id: %14
  br bb3                                          // id: %15

bb3:                                              // Preds: bb1 bb2
  %16 = tuple ()                                  // user: %17
  return %16 : $()                                // id: %17
}


// CHECK-LABEL: @unsigned_cmpeq_sub
// CHECK-NOT: cond_fail
// CHECK: return
sil hidden @unsigned_cmpeq_sub : $@convention(thin) (UInt64) -> () {
bb0(%0 : $UInt64):
  %1 = integer_literal $Builtin.Int64, 3          // users: %3, %12
  %2 = struct_extract %0 : $UInt64, #UInt64._value // users: %3, %7, %12
  %3 = builtin "cmp_ne_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64) : $Builtin.Int1 // user: %4
  cond_br %3, bb1, bb2                            // id: %4

bb1:                                              // Preds: bb0
  %5 = integer_literal $Builtin.Int64, 999        // user: %7
  %6 = integer_literal $Builtin.Int1, -1          // user: %7
  %7 = builtin "uadd_with_overflow_Int64"(%2 : $Builtin.Int64, %5 : $Builtin.Int64, %6 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %8
  %8 = tuple_extract %7 : $(Builtin.Int64, Builtin.Int1), 1 // user: %9
  %9 = tuple_extract %7 : $(Builtin.Int64, Builtin.Int1), 1 // user: %9
  br bb3                                          // id: %10

bb2:                                              // Preds: bb0
  %11 = integer_literal $Builtin.Int1, -1         // user: %12
  %12 = builtin "usub_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %11 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %13
  %13 = tuple_extract %12 : $(Builtin.Int64, Builtin.Int1), 1 // user: %14
  cond_fail %13 : $Builtin.Int1                   // id: %14
  br bb3                                          // id: %15

bb3:                                              // Preds: bb1 bb2
  %16 = tuple ()                                  // user: %17
  return %16 : $()                                // id: %17
}


// CHECK-LABEL: @signed_mul_previous_traps
// Keep the first condfail but remove the second one.
// CHECK: cond_fail
// CHECK-NOT: cond_fail
// CHECK: return
sil hidden @signed_mul_previous_traps : $@convention(thin) (Int64) -> () {
bb0(%0 : $Int64):
  %1 = integer_literal $Builtin.Int64, 9          // user: %4
  %2 = struct_extract %0 : $Int64, #Int64._value       // users: %4, %10, %15, %20, %25
  %3 = integer_literal $Builtin.Int1, -1          // users: %4, %10, %15, %20, %25
  %4 = builtin "smul_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %5
  %5 = tuple_extract %4 : $(Builtin.Int64, Builtin.Int1), 1 // user: %6
  cond_fail %5 : $Builtin.Int1                    // id: %6

  %7 = integer_literal $Builtin.Int64, 2
  %8 = builtin "smul_with_overflow_Int64"(%7 : $Builtin.Int64, %2 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %11
  %9 = tuple_extract %8 : $(Builtin.Int64, Builtin.Int1), 1 // user: %12

  // We can remove this check.
  cond_fail %9 : $Builtin.Int1
  %10 = tuple ()
  return %10 : $()
}

// CHECK-LABEL: @unsigned_mul_previous_traps
// Keep the first condfail but remove the second one.
// CHECK: umul_with_overflow_Int64
// CHECK: cond_fail
// CHECK: umul_with_overflow_Int64
// CHECK-NOT: cond_fail
// CHECK: return
sil hidden @unsigned_mul_previous_traps : $@convention(thin) (Int64) -> () {
bb0(%0 : $Int64):
  %1 = integer_literal $Builtin.Int64, 9          // user: %4
  %2 = struct_extract %0 : $Int64, #Int64._value       // users: %4, %10, %15, %20, %25
  %3 = integer_literal $Builtin.Int1, -1          // users: %4, %10, %15, %20, %25
  %4 = builtin "umul_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %5
  %5 = tuple_extract %4 : $(Builtin.Int64, Builtin.Int1), 1 // user: %6
  cond_fail %5 : $Builtin.Int1                    // id: %6

  %7 = integer_literal $Builtin.Int64, 2
  %8 = builtin "umul_with_overflow_Int64"(%7 : $Builtin.Int64, %2 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %11
  %9 = tuple_extract %8 : $(Builtin.Int64, Builtin.Int1), 1 // user: %12

  // We can remove this check.
  cond_fail %9 : $Builtin.Int1
  %10 = tuple ()
  return %10 : $()
}

// CHECK-LABEL: @signed_mul_previous_traps_neg
// CHECK: smul_with_overflow_Int64
// CHECK: smul_with_overflow_Int64
// Make sure we keep the last overflow check.
// CHECK: cond_fail
// CHECK: return
sil hidden @signed_mul_previous_traps_neg : $@convention(thin) (Int64) -> () {
bb0(%0 : $Int64):
  %1 = integer_literal $Builtin.Int64, 9          // user: %4
  %2 = struct_extract %0 : $Int64, #Int64._value       // users: %4, %10, %15, %20, %25
  %3 = integer_literal $Builtin.Int1, -1          // users: %4, %10, %15, %20, %25

  // This is X * 9
  // We can remove this check because the following check will guard us: abs(-100) > abs(9).
  %4 = builtin "smul_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %5
  %5 = tuple_extract %4 : $(Builtin.Int64, Builtin.Int1), 1 // user: %6
  cond_fail %5 : $Builtin.Int1                    // id: %6

  %7 = integer_literal $Builtin.Int64, -100
  %8 = builtin "smul_with_overflow_Int64"(%7 : $Builtin.Int64, %2 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %11
  %9 = tuple_extract %8 : $(Builtin.Int64, Builtin.Int1), 1 // user: %12

  // This is -100 * X. We can't remove this check because abs(-100) > abs(9).
  cond_fail %9 : $Builtin.Int1
  %10 = tuple ()
  return %10 : $()
}

// CHECK-LABEL: @signed_mul_previous_traps_abs_neg
// CHECK: smul_with_overflow_Int64
// CHECK: cond_fail
// CHECK: smul_with_overflow_Int64
// CHECK-NOT: cond_fail
// CHECK: return
sil hidden @signed_mul_previous_traps_abs_neg : $@convention(thin) (Int64) -> () {
bb0(%0 : $Int64):
  %1 = integer_literal $Builtin.Int64, 1000          // user: %4
  %2 = struct_extract %0 : $Int64, #Int64._value       // users: %4, %10, %15, %20, %25
  %3 = integer_literal $Builtin.Int1, -1          // users: %4, %10, %15, %20, %25

  // This is X * 9
  %4 = builtin "smul_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %5
  %5 = tuple_extract %4 : $(Builtin.Int64, Builtin.Int1), 1 // user: %6
  cond_fail %5 : $Builtin.Int1                    // id: %6

  %7 = integer_literal $Builtin.Int64, -100
  %8 = builtin "smul_with_overflow_Int64"(%7 : $Builtin.Int64, %2 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %11
  %9 = tuple_extract %8 : $(Builtin.Int64, Builtin.Int1), 1 // user: %12

  // This is -100 * X. We can remove this check because abs(-100) < abs(1000).
  cond_fail %9 : $Builtin.Int1
  %10 = tuple ()
  return %10 : $()
}


// CHECK-LABEL: @signed_mul_previous_traps_abs_neg2
// CHECK: smul_with_overflow_Int64
// CHECK: cond_fail
// CHECK: smul_with_overflow_Int64
// CHECK-NOT: cond_fail
// CHECK: return
sil hidden @signed_mul_previous_traps_abs_neg2 : $@convention(thin) (Int64) -> () {
bb0(%0 : $Int64):
  %1 = integer_literal $Builtin.Int64, 1000          // user: %4
  %2 = struct_extract %0 : $Int64, #Int64._value       // users: %4, %10, %15, %20, %25
  %3 = integer_literal $Builtin.Int1, -1          // users: %4, %10, %15, %20, %25

  // This is X * 9
  %4 = builtin "smul_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %5
  %5 = tuple_extract %4 : $(Builtin.Int64, Builtin.Int1), 1 // user: %6
  cond_fail %5 : $Builtin.Int1                    // id: %6

  %7 = integer_literal $Builtin.Int64, -100
  %8 = builtin "smul_with_overflow_Int64"(%7 : $Builtin.Int64, %2 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %11
  %9 = tuple_extract %8 : $(Builtin.Int64, Builtin.Int1), 1 // user: %12

  // This is -100 * X. We can remove this check because abs(-100) < abs(1000).
  cond_fail %9 : $Builtin.Int1
  %10 = tuple ()
  return %10 : $()
}

// CHECK-LABEL: @signed_mul_traps_min_int
// CHECK: smul_with_overflow_Int64
// CHECK: cond_fail
// CHECK: smul_with_overflow_Int64
// CHECK: cond_fail
// CHECK: return
sil hidden @signed_mul_traps_min_int : $@convention(thin) (Int64) -> () {
bb0(%0 : $Int64):
  %1 = integer_literal $Builtin.Int64, 1          // user: %4
  %2 = struct_extract %0 : $Int64, #Int64._value       // users: %4, %10, %15, %20, %25
  %3 = integer_literal $Builtin.Int1, -1          // users: %4, %10, %15, %20, %25

  // This is X * 9
  %4 = builtin "smul_with_overflow_Int64"(%2 : $Builtin.Int64, %1 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %5
  %5 = tuple_extract %4 : $(Builtin.Int64, Builtin.Int1), 1 // user: %6
  cond_fail %5 : $Builtin.Int1                    // id: %6

  %7 = integer_literal $Builtin.Int64, -1
  %8 = builtin "smul_with_overflow_Int64"(%7 : $Builtin.Int64, %2 : $Builtin.Int64, %3 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %11
  %9 = tuple_extract %8 : $(Builtin.Int64, Builtin.Int1), 1 // user: %12

  // This is -1 * X. We can remove this check because X could be MIN_INT, and the result will overflow.
  cond_fail %9 : $Builtin.Int1
  %10 = tuple ()
  return %10 : $()
}

// CHECK-LABEL: @signed_min_int_comparison
// CHECK: smul_with_overflow_Int8
// CHECK: cond_fail
// CHECK: smul_with_overflow_Int8
// CHECK-NOT: cond_fail
// CHECK: return
sil hidden @signed_min_int_comparison : $@convention(thin) (Int8) -> () {
bb0(%0 : $Int8):
  %1 = integer_literal $Builtin.Int8, -128
  %2 = struct_extract %0 : $Int8, #Int8._value
  %3 = integer_literal $Builtin.Int1, -1

  %4 = builtin "smul_with_overflow_Int8"(%2 : $Builtin.Int8, %1 : $Builtin.Int8, %3 : $Builtin.Int1) : $(Builtin.Int8, Builtin.Int1)
  %5 = tuple_extract %4 : $(Builtin.Int8, Builtin.Int1), 1
  cond_fail %5 : $Builtin.Int1

  %7 = integer_literal $Builtin.Int8, 127
  %8 = builtin "smul_with_overflow_Int8"(%2 : $Builtin.Int8, %7 : $Builtin.Int8, %3 : $Builtin.Int1) : $(Builtin.Int8, Builtin.Int1) // user: %11
  %9 = tuple_extract %8 : $(Builtin.Int8, Builtin.Int1), 1 // user: %12

  cond_fail %9 : $Builtin.Int1
  %10 = tuple ()
  return %10 : $()
}

// CHECK-LABEL: @crash_unary_comparator
// CHECK: return
sil hidden @crash_unary_comparator : $@convention(thin) (Builtin.Int32) -> () {
bb0(%0 : $Builtin.Int32):
  %1 = builtin "trunc_Int32_Int1"(%0 : $Builtin.Int32) : $Builtin.Int1
  cond_br %1, bb1, bb2                            // id: %4

bb1:                                              // Preds: bb0
  br bb3                                          // id: %10

bb2:                                              // Preds: bb0
  br bb3                                          // id: %15

bb3:                                              // Preds: bb1 bb2
  %3 = tuple ()                                  // user: %17
  return %3 : $()                                // id: %17
}

// Check that we are not crashing on arithmetic of different kinds
// that makes formulas of different types.
sil hidden @mixed_types : $@convention(thin) (Int8) -> () {
bb0(%0 : $Int8):
  %1 = integer_literal $Builtin.Int8, -128
  %2 = struct_extract %0 : $Int8, #Int8._value
  %3 = integer_literal $Builtin.Int1, -1
  %4 = builtin "smul_with_overflow_Int8"(%2 : $Builtin.Int8, %1 : $Builtin.Int8, %3 : $Builtin.Int1) : $(Builtin.Int8, Builtin.Int1)
  %5 = tuple_extract %4 : $(Builtin.Int8, Builtin.Int1), 1
  cond_fail %5 : $Builtin.Int1

  %v0 = integer_literal $Builtin.Int32, 128
  %v1 = integer_literal $Builtin.Int32, 128
  %v4 = builtin "smul_with_overflow_Int32"(%v1 : $Builtin.Int32, %v0 : $Builtin.Int32, %3 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1)
  %v5 = tuple_extract %v4 : $(Builtin.Int32, Builtin.Int1), 1
  cond_fail %v5 : $Builtin.Int1


  %g0 = integer_literal $Builtin.Int64, 2
  %g1 = integer_literal $Builtin.Int64, 1
  %g3 = builtin "cmp_slt_Int64"(%g0 : $Builtin.Int64, %g1 : $Builtin.Int64) : $Builtin.Int1
  cond_fail %g3 : $Builtin.Int1

  %t0 = integer_literal $Builtin.Int32, 2
  %t1 = integer_literal $Builtin.Int32, 1
  %t3 = builtin "cmp_slt_Int32"(%t0 : $Builtin.Int32, %t1 : $Builtin.Int32) : $Builtin.Int1
  cond_fail %t3 : $Builtin.Int1

  %ret = tuple ()
  return %ret : $()
}

//  Check that the optimization can handle even patterns like this:
//  %cmp_result = builtin "cmp_ult_Int64"(%x : $Builtin.Int64, %y : $Builtin.Int64) : $Builtin.Int1
//  This cond_fail formula should be registered!
//  cond_fail %cmp_result : $Builtin.Int1
//  At this point we know that x >= y
//  %usub_result = builtin "usub_with_overflow_Int64"(%x : $Builtin.Int64, %y : $Builtin.Int64, %check_overflow : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1)
//  %usub_val = tuple_extract %usub_result : $(Builtin.Int64, Builtin.Int1), 0
//  We can figure out that x - y will not underflow because of x >= y
//  %usub_underverflow = tuple_extract %usub_result : $(Builtin.Int64, Builtin.Int1), 1
//  cond_fail %usub_underflow : $Builtin.Int1

// CHECK-LABEL: sil @cond_fail_of_cmp
// CHECK: cond_fail
// Second cond_fail should be removed, because it never fails.
// CHECK-NOT: cond_fail
// CHECK: // end sil function 'cond_fail_of_cmp' 
sil @cond_fail_of_cmp : $@convention(thin) (Builtin.Int64, Builtin.Int64) -> () {
bb0(%x : $Builtin.Int64, %y: $Builtin.Int64):
  %cmp_result = builtin "cmp_ult_Int64"(%x : $Builtin.Int64, %y : $Builtin.Int64) : $Builtin.Int1
  //  This cond_fail formula should be registered!
  cond_fail %cmp_result : $Builtin.Int1
  %check_overflow = integer_literal $Builtin.Int1, -1
  //  At this point we know that x >= y
  %usub_result = builtin "usub_with_overflow_Int64"(%x : $Builtin.Int64, %y : $Builtin.Int64, %check_overflow : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1)
  %usub_val = tuple_extract %usub_result : $(Builtin.Int64, Builtin.Int1), 0
  //  We can figure out that x - y will not underflow because of x >= y
  %usub_underflow = tuple_extract %usub_result : $(Builtin.Int64, Builtin.Int1), 1
  cond_fail %usub_underflow : $Builtin.Int1

  %ret = tuple ()
  return %ret : $()
} // end sil function 'cond_fail_of_cmp'