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Kmake/deps/v8/test/mjsunit/turboshaft/maglev-frontend/generator-loop-no-forward-edge.js
2026-05-26 23:36:42 -07:00

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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* foo(o) {
o.x; // No feedback for this load --> will be an unconditional deopt in the
// Maglev graph. As a result, the while-loop below won't have a forward
// edge.
let i = 0;
while (true) { yield i++; }
}
let gen = foo({ x : 1 });
for (let i = 0; i < 20000; i++) {
// OSR will eventually kick in.
assertEquals(i, gen.next().value);
}