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d8c97e4857
PR-URL: https://github.com/nodejs/node/pull/50115 Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com> Reviewed-By: Michael Dawson <midawson@redhat.com>
44 lines
1.2 KiB
JavaScript
44 lines
1.2 KiB
JavaScript
// Copyright 2023 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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// This 2 tests contain small loops with mutually recursive loop phis (in each
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// case, the second input of `i` and `j` are `j` and `i`). These tests could
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// help find bugs in optimization phases that are processing phis "in sequence"
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// instead of processing them "in parallel".
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// Using "3" as the number of iterations so that the loop could in theory be
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// fully unrolled.
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function g(a, b) {
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let s = 0;
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for (let c = 0, i = a, j = b; c < 3; [i, j] = [j, i]) {
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s += i + j;
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c++;
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}
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return s;
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}
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%PrepareFunctionForOptimization(g);
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assertEquals(g(8, 3), 33);
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%OptimizeFunctionOnNextCall(g);
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assertEquals(g(8, 3), 33);
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// Using a variable as the number of iterations ("a") so that the loop cannot be
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// fully unrolled.
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function f(a, b) {
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let s = 0;
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for (let c = 0, i = a, j = b; c < a; [i, j] = [j, i]) {
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s += i + j;
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c++;
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}
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return s;
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}
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%PrepareFunctionForOptimization(f);
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assertEquals(f(8, 3), 88);
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%OptimizeFunctionOnNextCall(f);
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assertEquals(f(8, 3), 88);
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