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f579e11940
PR-URL: https://github.com/nodejs/node/pull/26685 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Refael Ackermann <refack@gmail.com>
127 lines
2.8 KiB
JavaScript
127 lines
2.8 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 --opt --noalways-opt
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const undetectable = %GetUndetectable();
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// Known undetectable abstract equality.
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(function() {
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const a = undetectable;
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const b = {};
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function foo() { return a == b; }
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%PrepareFunctionForOptimization(foo);
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assertFalse(foo());
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assertFalse(foo());
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%OptimizeFunctionOnNextCall(foo);
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assertFalse(foo());
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})();
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// Known undetectable/null abstract equality.
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(function() {
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const a = undetectable;
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const b = null;
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function foo() { return a == b; }
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%PrepareFunctionForOptimization(foo);
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assertTrue(foo());
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assertTrue(foo());
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo());
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})();
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// Known undetectable/receiver abstract equality.
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(function() {
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const a = null;
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const b = undetectable;
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function foo() { return a == b; }
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%PrepareFunctionForOptimization(foo);
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assertTrue(foo());
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assertTrue(foo());
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo());
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})();
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// Known undetectable/undefined abstract equality.
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(function() {
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const a = undetectable;
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const b = undefined;
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function foo() { return a == b; }
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%PrepareFunctionForOptimization(foo);
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assertTrue(foo());
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assertTrue(foo());
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo());
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})();
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// Known undefined/undetectable abstract equality.
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(function() {
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const a = undefined;
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const b = undetectable;
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function foo() { return a == b; }
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%PrepareFunctionForOptimization(foo);
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assertTrue(foo());
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assertTrue(foo());
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo());
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})();
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// Known undetectable on one side strict equality with receiver.
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(function() {
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const a = {};
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const b = undetectable;
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function foo(a) { return a == b; }
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%PrepareFunctionForOptimization(foo);
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assertTrue(foo(b));
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assertFalse(foo(a));
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assertTrue(foo(b));
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assertFalse(foo(a));
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo(b));
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assertFalse(foo(a));
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// TurboFan doesn't need to bake in feedback, since it sees the undetectable.
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assertFalse(foo(1));
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assertOptimized(foo);
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})();
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// Unknown undetectable on one side strict equality with receiver.
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(function() {
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const a = undetectable;
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const b = {};
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function foo(a, b) { return a == b; }
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%PrepareFunctionForOptimization(foo);
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assertTrue(foo(b, b));
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assertFalse(foo(a, b));
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assertTrue(foo(a, a));
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assertFalse(foo(b, a));
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assertTrue(foo(a, null));
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assertFalse(foo(b, null));
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo(b, b));
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assertFalse(foo(a, b));
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assertTrue(foo(a, a));
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assertFalse(foo(b, a));
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assertTrue(foo(a, null));
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assertFalse(foo(b, null));
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assertOptimized(foo);
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// TurboFan bakes in feedback on the inputs.
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assertFalse(foo(1));
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assertUnoptimized(foo);
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})();
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