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f7f6c928c1
PR-URL: https://github.com/nodejs/node/pull/29694 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
81 lines
1.7 KiB
JavaScript
81 lines
1.7 KiB
JavaScript
// Copyright 2019 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
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(function testFunctionPrototypeHasInstance() {
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class A {};
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var a = new A;
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function foo() {
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return A[Symbol.hasInstance](a);
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};
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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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(function testFunctionPrototypeHasInstanceWithInference() {
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class A {};
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var a = new A;
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a.bla = 42;
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function foo() {
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a.bla;
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return A[Symbol.hasInstance](a);
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};
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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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(function testFunctionPrototypeHasInstanceWithBoundFunction() {
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class A {};
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var a = new A;
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var f = A.bind({});
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function foo() {
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return f[Symbol.hasInstance](a);
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};
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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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// JSCallReducer::ReduceFunctionPrototypeHasInstance ->
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// JSNative...::ReduceJSOrdinaryHasInstance ->
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// JSNative...::ReduceJSInstanceOf (on bound_target_function)
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// ~~~~~>
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// JSCallReducer::ReduceFunctionPrototypeHasInstance
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// JSNative...::ReduceJSOrdinaryHasInstance ->
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// JSNative...::ReduceJSHasInPrototypeChain
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})();
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(function testSimpleInstanceOf() {
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class A {};
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var a = new A;
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function foo() {
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return a instanceof A;
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};
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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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