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在OdinMonkey中优化asm.js

[英]Optimize for asm.js in OdinMonkey

原文 2014-01-02 20:10:27 1 1 javascript/ assembly/ x86/ spidermonkey/ asm.js

Assume that I am writing a compiler with an asm.js-backend. 假设我正在使用asm.js-backend编写编译器。 In order to generate the most efficient code, I'd like to know how the generated asm.js code is translated to machine code. 为了生成最有效的代码，我想知道如何将生成的asm.js代码转换为机器代码。 Is there a way to dump the (x86-64 in my case) assembly generated by OdinMonkey with a SpiderMonkey build like here: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Build_Documentation ? 有没有办法像这样在转储由SpiderMonkey构建的OdinMonkey（在我的情况下为x86-64）程序集： https : //developer.mozilla.org/en-US/docs/SpiderMonkey/Build_Documentation ？

1 个解决方案

I have just learnt that OdinMonkey does not directly generate assembler code ( https://github.com/dherman/asm.js/issues/80#issuecomment-31673247 ) but does generate optimized MIR code for IonMonkey, which is then translated to LIR code and then to machine code. 我刚刚了解到OdinMonkey不会直接生成汇编代码（ https://github.com/dherman/asm.js/issues/80#issuecomment-31673247 ），但会为IonMonkey生成优化的MIR代码，然后将其转换为LIR代码，然后再输入机器代码。

Thus my question should have been how to dump the assembly that IonMonkey processes and outputs. 因此，我的问题应该是如何转储IonMonkey处理和输出的程序集。 For the intermediate code one can use a debug build of SpiderMonkey's js shell with IONFLAGS=logs. 对于中间代码，可以使用带有IONFLAGS = logs的SpiderMonkey js shell的调试版本。 This gives quite a lot of information in /tmp/ion.cfg. 这在/tmp/ion.cfg中提供了很多信息。 For the assembly code, this site ( https://developer.mozilla.org/en-US/docs/SpiderMonkey/Hacking_Tips ) suggests to use gdb to disassemble the machine code. 对于汇编代码，此站点（ https://developer.mozilla.org/en-US/docs/SpiderMonkey/Hacking_Tips ）建议使用gdb分解机器代码。