32 lines
851 B
JavaScript
32 lines
851 B
JavaScript
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// 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
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// Test variable index access to rest parameters
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// with up to 2 elements.
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(function testRestParametersVariableIndex() {
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function g(...args) {
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let s = 0;
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for (let i = 0; i < args.length; ++i) s += args[i];
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return s;
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}
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function f(x, y) {
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// (a) args[i] is dead code since args.length is 0.
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const a = g();
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// (b) args[i] always yields the first element.
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const b = g(x);
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// (c) args[i] can yield either x or y.
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const c = g(x, y);
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return a + b + c;
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}
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assertEquals(4, f(1, 2));
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assertEquals(5, f(2, 1));
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%OptimizeFunctionOnNextCall(f);
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assertEquals(4, f(1, 2));
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assertEquals(5, f(2, 1));
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})();
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