chakra-core/ChakraCore

don't emit LdNativeCodeData if function doesn't use any

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#5,516 创建于 2018年7月24日

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 (0 评论) (0 反应) (0 负责人)JavaScript (9,000 star) (1,374 fork)batch import
Performancehelp wanted

描述

Most JS functions will have a bailout or something that uses native code data, but wasm functions never will (or almost never). We should change to only emit this instruction only if we actually need it. It's a bit tricky to track, since most of the uses are introduced during lowerer or later, but it should be doable.

贡献者指南

技术栈
cppjavascript
领域
performance
议题类型
performance
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
5
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
over 1 week
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
C++JavaScript engine internalscompiler optimization
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
10
研究方向
Investigate how and where LdNativeCodeData instructions are emitted in the ChakraCore backend. Track all uses introduced during lowering and later phases, and implement a conditional emit mechanism. The issue is open and unassigned, so no linked PRs or comments. Focus on the backend code in the JIT compiler, likely in files related to code generation.