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PR-URL: https://github.com/nodejs/node/pull/44741 Fixes: https://github.com/nodejs/node/issues/44650 Fixes: https://github.com/nodejs/node/issues/37472 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
38 lines
1.2 KiB
JavaScript
38 lines
1.2 KiB
JavaScript
// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax --turbofan --noalways-turbofan
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// Test that String.fromCodePoint() properly identifies zeros.
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(function() {
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function foo(x) {
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return String.fromCodePoint(x);
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}
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%PrepareFunctionForOptimization(foo);
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assertEquals("\u0000", foo(0));
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assertEquals("\u0000", foo(-0));
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%OptimizeFunctionOnNextCall(foo);
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assertEquals("\u0000", foo(0));
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assertEquals("\u0000", foo(-0));
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assertOptimized(foo);
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// Prepare foo to be re-optimized, ensuring it's bytecode / feedback vector
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// doesn't get flushed after deoptimization.
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%PrepareFunctionForOptimization(foo);
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// Now passing anything outside the valid code point
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// range should invalidate the optimized code.
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assertThrows(_ => foo(-1));
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assertUnoptimized(foo);
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// And TurboFan should not inline the builtin anymore
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// from now on (aka no deoptimization loop).
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%OptimizeFunctionOnNextCall(foo);
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assertEquals("\u0000", foo(0));
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assertEquals("\u0000", foo(-0));
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assertThrows(_ => foo(-1));
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assertOptimized(foo);
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})();
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