33 lines
989 B
JavaScript
33 lines
989 B
JavaScript
|
// Copyright 2018 the V8 project authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
// Flags: --allow-natives-syntax --opt --noalways-opt
|
||
|
|
|
||
|
|
// Test that String.fromCodePoint() properly identifies zeros.
|
||
|
|
(function() {
|
||
|
|
function foo(x) {
|
||
|
|
return String.fromCodePoint(x);
|
||
|
|
}
|
||
|
|
|
||
|
|
assertEquals("\u0000", foo(0));
|
||
|
|
assertEquals("\u0000", foo(-0));
|
||
|
|
%OptimizeFunctionOnNextCall(foo);
|
||
|
|
assertEquals("\u0000", foo(0));
|
||
|
|
assertEquals("\u0000", foo(-0));
|
||
|
|
assertOptimized(foo);
|
||
|
|
|
||
|
|
// Now passing anything outside the valid code point
|
||
|
|
// range should invalidate the optimized code.
|
||
|
|
assertThrows(_ => foo(-1));
|
||
|
|
assertUnoptimized(foo);
|
||
|
|
|
||
|
|
// And TurboFan should not inline the builtin anymore
|
||
|
|
// from now on (aka no deoptimization loop).
|
||
|
|
%OptimizeFunctionOnNextCall(foo);
|
||
|
|
assertEquals("\u0000", foo(0));
|
||
|
|
assertEquals("\u0000", foo(-0));
|
||
|
|
assertThrows(_ => foo(-1));
|
||
|
|
assertOptimized(foo);
|
||
|
|
})();
|