b8229612bf
- Add a new bytecode for the ToString operation, replacing the old intrinsic call (currently does not collect type feedback). - Add a new AST node to represent TemplateLiterals, and avoid generating unnecessary ToString operations in some simple cases. - Use a single feedback slot for each string addition, because the type feedback should always be the same for each addition This seems to produce a very slight improvement on JSTests benchmarks and bench-ruben.js from v8:7415, and it's possible that type feedback for the ToString bytecode could provide more opportunities to eliminate the runtime call in TurboFan. Doesn't touch tagged templates [esnext] fix OOB read in ASTPrinter::VisistTemplateLiteral Fixes an error where TemplateLiteral printing in --print-ast would try to read an element beyond the length of a vector. BUG=v8:7415, chromium:820596 R=adamk@chromium.org, gsathya@chromum.org, rmcilroy@chromium.org, ishell@chromium.org, bmeurer@chromium.org Change-Id: Ie56894f73a6445550a5f95f42160c4e29ab1da42 Reviewed-on: https://chromium-review.googlesource.com/958408 Reviewed-by: Benedikt Meurer <bmeurer@chromium.org> Commit-Queue: Caitlin Potter <caitp@igalia.com> Cr-Commit-Position: refs/heads/master@{#51933}
9 lines
243 B
JavaScript
9 lines
243 B
JavaScript
// Copyright 2018 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: --print-ast
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var x;
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`Crashes if OOB read with --print-ast ${x}`;
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