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>
33 lines
1.2 KiB
JavaScript
33 lines
1.2 KiB
JavaScript
// Copyright 2024 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
// Flags: --allow-natives-syntax --turbolev --turbofan
|
|
|
|
function f0() {
|
|
for (let i = 0; i < 1; i++) {
|
|
// We're not actually collecting enough feedback for this, which means that
|
|
// Maglev will insert an unconditional Deopt in the loop. However, because
|
|
// this is within a loop, Maglev won't see that the code that follows the
|
|
// loop is actually unreachable. Still, Maglev won't emit the backedge,
|
|
// which means that from Turboshaft's point of vue, we won't have a loop but
|
|
// just a "regular" unconditional Deopt, and Turboshaft thus won't even try
|
|
// to emit anything past this loop.
|
|
class C5 { }
|
|
C5.g = C5;
|
|
}
|
|
try { f0.not_defined(); }
|
|
catch (e) {
|
|
// This catch block is entered when we try to call `f0.not_defined()`.
|
|
// However, because of the unconditional deopt above, it won't be directly
|
|
// reachable from Turboshaft.
|
|
return 42;
|
|
}
|
|
return 17;
|
|
}
|
|
|
|
%PrepareFunctionForOptimization(f0);
|
|
assertEquals(42, f0());
|
|
%OptimizeFunctionOnNextCall(f0);
|
|
assertEquals(42, f0());
|