blob: a076955af820a68ebd0828112cfdbe831c6bde78 [file] [log] [blame]
// Copyright (c) 2013, 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.
import 'package:async_helper/async_helper.dart';
import 'package:expect/expect.dart';
import 'compiler_helper.dart';
// Test that if (x == y) where we know nothing about x and y will get optimized
// to if ($.$eq(x, y)) and not
// to if ($.$eq(x, y) == true)
// This is an optimization based on seeing that all the relational operators,
// ==, <, >, <=, >= only have implementations that return bool.
const String TEST = """
int inscrutable(int x) => x == 0 ? 0 : x | inscrutable(x & (x - 1));
class A {
A(this.foo);
int foo;
operator==(other) {
// Make the source size and AST size bigger so that it is not analyzed
// first.
1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+11+1+1+1+11+1+1+11+1+1;
return this.foo == other.foo;
}
}
class B extends A {
B(int foo, this.bar) : super(foo);
int bar;
operator==(other) {
if (other.bar != bar) return false;
return other.foo == foo;
}
}
main() {
var a = new A(inscrutable(0) == 0 ? 42 : "fish");
var b = new B(0, inscrutable(0) == 0 ? 2 : "horse");
var c = inscrutable(0) == 0 ? a : "kurt";
var d = inscrutable(0) == 0 ? b : "gert";
if (c == d) {
print("hestfisk");
}
}
""";
void main() {
asyncTest(() => compileAll(TEST).then((generated) {
if (generated.contains(r'=== true')) {
print(generated);
Expect.fail("missing elision of '=== true'");
}
}));
}