918fe04351
PR-URL: https://github.com/nodejs/node/pull/58070 Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Darshan Sen <raisinten@gmail.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
58 lines
1.7 KiB
JavaScript
58 lines
1.7 KiB
JavaScript
// Copyright 2024 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 --turbolev --turbofan
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function f_switch(x) {
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switch(x) {
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// Need at least v8_flags.switch_table_min_cases (= 6) cases so that the
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// bytecode optimizes this switch with a jumptable rather than generating
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// cascading ifs/elses.
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case 3: return 3;
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case 4: return 5;
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case 5: return 7;
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case 6: return 11;
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// hole between 6 and 9
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case 9: return 13;
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// hole between 9 and 13
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case 13: return 17;
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default: return 19;
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}
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}
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%PrepareFunctionForOptimization(f_switch);
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assertEquals(3, f_switch(3));
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assertEquals(5, f_switch(4));
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assertEquals(7, f_switch(5));
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assertEquals(11, f_switch(6));
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assertEquals(13, f_switch(9));
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assertEquals(17, f_switch(13));
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// Testing holes/default case
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assertEquals(19, f_switch(0));
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assertEquals(19, f_switch(2));
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assertEquals(19, f_switch(7));
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assertEquals(19, f_switch(8));
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assertEquals(19, f_switch(10));
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assertEquals(19, f_switch(12));
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assertEquals(19, f_switch(42));
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%OptimizeFunctionOnNextCall(f_switch);
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assertEquals(3, f_switch(3));
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assertOptimized(f_switch);
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assertEquals(5, f_switch(4));
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assertEquals(7, f_switch(5));
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assertEquals(11, f_switch(6));
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assertEquals(13, f_switch(9));
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assertEquals(17, f_switch(13));
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assertOptimized(f_switch);
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// Testing holes/default case
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assertEquals(19, f_switch(0));
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assertEquals(19, f_switch(2));
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assertEquals(19, f_switch(7));
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assertEquals(19, f_switch(8));
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assertEquals(19, f_switch(10));
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assertEquals(19, f_switch(12));
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assertEquals(19, f_switch(42));
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assertOptimized(f_switch);
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