runtime/tests/vm/dart_2/entrypoints/tearoff_test.dart

// Copyright (c) 2018, 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.
//
// VMOptions=--enable-testing-pragmas --no-background-compilation --optimization-counter-threshold=10
// VMOptions=--enable-testing-pragmas --no-background-compilation --optimization-counter-threshold=10 -Denable_inlining=true
// VMOptions=--enable-testing-pragmas --no-background-compilation --optimization-counter-threshold=-1

// Test that typed calls against tearoffs go into the unchecked entrypoint.

import "package:expect/expect.dart";
import "common.dart";

class C<T> {
  @NeverInline
  @pragma("vm:testing.unsafe.trace-entrypoints-fn", validateTearoff)
  @pragma("vm:entry-point")
  void target1(T x, String y) {
    Expect.notEquals(x, -1);
    Expect.equals(y, "foo");
  }
}

void run(void Function(int, String) fn, int i) {
  fn(i, "foo");
}

main(List<String> args) {
  var f = (new C<int>()).target1;

  const int iterations = benchmarkMode ? 100000000 : 100;
  for (int i = 0; i < iterations; ++i) {
    run(f, i);
  }

  entryPoint.expectChecked(iterations);
  tearoffEntryPoint.expectUnchecked(iterations);
}