tests/ffi/regress_39044_test.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
//
// Check that the optimizer does not fuse constants with different
// representations.
//
// SharedObjects=ffi_test_functions

import "dart:ffi";

import "package:expect/expect.dart";

import "dylib_utils.dart";

main() {
  final ffiTestFunctions = dlopenPlatformSpecific("ffi_test_functions");

  final intComputation = ffiTestFunctions
      .lookupFunction<Int64 Function(Int64, Int8), int Function(int, int)>(
        "Regress39044",
      );

  // The arguments are the same Smi constant, however they are different sizes.
  final result = intComputation(
    /* dart::kUnboxedInt64 --> int64_t             */ 1,
    /* dart::kUnboxedInt32 --> truncated to int8_t */ 1,
  );

  Expect.equals(0, result);
}