test/SILOptimizer/mem2reg_liveness_ossa.sil

// RUN: %target-sil-opt -enable-sil-verify-all %s -mem2reg | %FileCheck %s

import Builtin
import Swift

sil [ossa] @_Ts5printFT3valSi_T_ : $@convention(thin) (Int64) -> ()

// CHECK-LABEL: sil [ossa] @liveness0 :
// CHECK-NOT: alloc_stack
sil [ossa] @liveness0 : $@convention(thin) (Int64) -> () {
bb0(%0 : $Int64):
  %1 = alloc_stack $Int64, var, name "x"
  store %0 to [trivial] %1 : $*Int64
  %3 = integer_literal $Builtin.Int64, 10
  %5 = struct_extract %0 : $Int64, #Int64._value
  %6 = builtin "cmp_eq_Int64"(%5 : $Builtin.Int64, %3 : $Builtin.Int64) : $Builtin.Int1
  cond_br %6, bb1, bb5

bb1:
  %8 = alloc_stack $Int64, var, name "y"
  %9 = integer_literal $Builtin.Int64, 20
  %10 = struct $Int64 (%9 : $Builtin.Int64)
  store %10 to [trivial] %8 : $*Int64
  %12 = integer_literal $Builtin.Int64, 3
  %14 = struct_extract %0 : $Int64, #Int64._value
  %15 = builtin "cmp_sgt_Int64"(%14 : $Builtin.Int64, %12 : $Builtin.Int64) : $Builtin.Int1
  cond_br %15, bb2, bb3

bb2:
  %17 = integer_literal $Builtin.Int64, 0
  %18 = struct $Int64 (%17 : $Builtin.Int64)
  store %18 to [trivial] %8 : $*Int64
  br bb4

bb3:
  %21 = integer_literal $Builtin.Int64, 2
  %22 = struct $Int64 (%21 : $Builtin.Int64)
  store %22 to [trivial] %8 : $*Int64
  br bb4

bb4:
  // function_ref
  %25 = function_ref @_Ts5printFT3valSi_T_ : $@convention(thin) (Int64) -> ()
  %26 = load [trivial] %8 : $*Int64
  %27 = integer_literal $Builtin.Int64, 2
  %28 = integer_literal $Builtin.Int1, -1
  %30 = struct_extract %26 : $Int64, #Int64._value
  %31 = builtin "sadd_with_overflow_Int64"(%30 : $Builtin.Int64, %27 : $Builtin.Int64, %28 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1)
  %32 = tuple_extract %31 : $(Builtin.Int64, Builtin.Int1), 0
  %33 = tuple_extract %31 : $(Builtin.Int64, Builtin.Int1), 1
  %34 = struct $Int64 (%32 : $Builtin.Int64)
  cond_fail %33 : $Builtin.Int1
  %36 = apply %25(%34) : $@convention(thin) (Int64) -> ()
  dealloc_stack %8 : $*Int64
  br bb6

bb5:
  br bb6

// We don't need a PHI node here because the value is dead!
// CHECK: bb5:
bb6:
  dealloc_stack %1 : $*Int64
  %40 = tuple ()
  return %40 : $()
}
// CHECK-LABEL: } // end sil function 'liveness0'