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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>
67 lines
2.2 KiB
JavaScript
67 lines
2.2 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
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// Test that ObjectIsArrayBufferView lowering works correctly
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// in EffectControlLinearizer in the case that the input is
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// known to be a HeapObject by TurboFan. For this we use the
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// simple trick with an object literal whose field `x` will
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// only ever contain HeapObjects and so the representation
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// tracking is going to pick it up.
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(function() {
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function foo(x) {
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return ArrayBuffer.isView({x}.x);
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}
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%PrepareFunctionForOptimization(foo);
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assertFalse(foo(Symbol()));
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assertFalse(foo("some string"));
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assertFalse(foo(new Object()));
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assertFalse(foo(new Array()));
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assertFalse(foo(new ArrayBuffer(1)));
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assertTrue(foo(new Int32Array(1)));
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assertTrue(foo(new DataView(new ArrayBuffer(1))));
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%OptimizeFunctionOnNextCall(foo);
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assertFalse(foo(Symbol()));
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assertFalse(foo("some string"));
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assertFalse(foo(new Object()));
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assertFalse(foo(new Array()));
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assertFalse(foo(new ArrayBuffer(1)));
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assertTrue(foo(new Int32Array(1)));
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assertTrue(foo(new DataView(new ArrayBuffer(1))));
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assertOptimized(foo);
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})();
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// Test that ObjectIsArrayBufferView lowering works correctly
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// in EffectControlLinearizer in the case that the input is
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// some arbitrary tagged value.
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(function() {
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function foo(x) {
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return ArrayBuffer.isView(x);
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}
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%PrepareFunctionForOptimization(foo);
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assertFalse(foo(1));
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assertFalse(foo(1.1));
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assertFalse(foo(Symbol()));
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assertFalse(foo("some string"));
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assertFalse(foo(new Object()));
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assertFalse(foo(new Array()));
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assertFalse(foo(new ArrayBuffer(1)));
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assertTrue(foo(new Int32Array(1)));
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assertTrue(foo(new DataView(new ArrayBuffer(1))));
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%OptimizeFunctionOnNextCall(foo);
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assertFalse(foo(1));
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assertFalse(foo(1.1));
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assertFalse(foo(Symbol()));
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assertFalse(foo("some string"));
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assertFalse(foo(new Object()));
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assertFalse(foo(new Array()));
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assertFalse(foo(new ArrayBuffer(1)));
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assertTrue(foo(new Int32Array(1)));
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assertTrue(foo(new DataView(new ArrayBuffer(1))));
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assertOptimized(foo);
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})();
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