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Quelle ValueUsage.h Sprache: C |
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- * vim: set ts=8 sts=2 et sw=2 tw=80: * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef frontend_ValueUsage_h #define frontend_ValueUsage_h namespace js { namespace frontend { // Used to control whether the expression result is used. This enables various // optimizations, for example it allows to emit JSOp::CallIgnoresRv for function // calls. enum class ValueUsage { // Assume the value of the current expression may be used. This is always // correct but prohibits optimizations like JSOp::CallIgnoresRv. WantValue, // Pass this when emitting an expression if the expression's value is // definitely unused by later instructions. You must make sure the next // instruction is JSOp::Pop, a jump to a JSOp::Pop, or something similar. IgnoreValue }; } /* namespace frontend */ } /* namespace js */ #endif /* frontend_ValueUsage_h */
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2026-04-02