constant_propagation.sil

// RUN: %target-sil-opt -enable-sil-verify-all -sil-print-debuginfo -diagnostic-constant-propagation %s | %FileCheck %s
// REQUIRES: CPU=arm64 || CPU=x86_64

sil_stage canonical

import Builtin
import Swift
import SwiftShims

func foo(x: Int, y: Int) -> Int

sil_scope 1 { loc "file.swift":1:6 parent @foo : $@convention(thin) (Int, Int) -> Int }

// Test if debug_value got preserved when %16 is removed in favor of directly using %13
// CHECK-LABEL: sil {{.*}} @foo
sil hidden @foo : $@convention(thin) (Int, Int) -> Int {
bb0(%0 : $Int, %1 : $Int):
  %4 = integer_literal $Builtin.Int64, 87, loc "file.swift":2:17, scope 1
  %9 = struct_extract %0 : $Int, #Int._value, loc "file.swift":2:15, scope 1
  %11 = integer_literal $Builtin.Int1, -1, loc "file.swift":2:15, scope 1
  // CHECK: %[[ADD:.+]] = builtin "sadd_with_overflow
  %12 = builtin "sadd_with_overflow_Int64"(%9 : $Builtin.Int64, %4 : $Builtin.Int64, %11 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1), loc "file.swift":2:15, scope 1
  // CHECK: (%[[RESULT:.+]], %{{.*}}) = destructure_tuple %[[ADD]]
  (%13, %14) = destructure_tuple %12 : $(Builtin.Int64, Builtin.Int1), loc "file.swift":2:15, scope 1
  %16 = struct $Int (%13 : $Builtin.Int64), loc "file.swift":2:15, scope 1
  // In addition to checking if `op_fragment` is generated, we're also checking if "z"'s declared
  // source location, as well as `debug_value`'s instruction source location are preserved.
  // CHECK: debug_value %[[RESULT]] : $Builtin.Int{{[0-9]+}}, let, name "z"
  // CHECK-SAME: type $Int
  // CHECK-SAME: expr op_fragment:#Int._value
  // CHECK-SAME: loc "file.swift":2:9, scope 1
  debug_value %16 : $Int, let, name "z", loc "file.swift":2:9, scope 1
  %19 = struct_extract %16 : $Int, #Int._value, loc "file.swift":3:14, scope 1
  %20 = struct_extract %1 : $Int, #Int._value, loc "file.swift":3:14, scope 1
  %21 = integer_literal $Builtin.Int1, -1, loc "file.swift":3:14, scope 1
  %22 = builtin "sadd_with_overflow_Int64"(%19 : $Builtin.Int64, %20 : $Builtin.Int64, %21 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1), loc "file.swift":3:14, scope 1
  (%23, %24) = destructure_tuple %22 : $(Builtin.Int64, Builtin.Int1), loc "file.swift":3:14, scope 1
  %26 = struct $Int (%23 : $Builtin.Int64), loc "file.swift":3:14, scope 1
  return %26 : $Int, loc "file.swift":3:5, scope 1
} // end sil function 'foo'