9439a1d2bb
We'll let the bytecode compiler and optimizing compilers deal with dead code, rather than the ast visitors. The problem is that the visitors previously disagreed upon what was dead. That's bad if necessary visitors omit parts of the code that the bytecode generator will actually visit. I did consider removing the AST nodes immediately in the parser, but that adds overhead and actually broke code coverage. Since dead code shouldn't be shipped to the browser anyway (and we can still omit it later in the bytecode generator), I opted for keeping the nodes instead. Change-Id: Ib02fa9031b17556d2e1d46af6648356486f8433d Reviewed-on: https://chromium-review.googlesource.com/c/1470108 Commit-Queue: Toon Verwaest <verwaest@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#59569}
13 lines
306 B
JavaScript
13 lines
306 B
JavaScript
// Copyright 2019 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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var asdf = false;
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const f =
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(v1 = (function g() {
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if (asdf) { return; } else { return; }
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(function h() {});
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})()) => 1;
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f();
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