简体繁体 English

Scala编译器中间代码的规范

[英]Specification of Scala compiler's intermediate code

原文 2015-05-16 22:03:25 3 2 scala/ scalac/ intermediate-code

Is there any formal specification or detailed description of the intermediate code generated by the Scala compiler (ie passing the -Xprint-icode option to scalac)? Scala编译器生成的中间代码是否有任何正式规范或详细描述（即，将-Xprint-icode选项传递给scalac）？

Thanks. 谢谢。

2 个解决方案

The icode format is going away, with the introduction of the new GenBCode backend, which goes directly from scalac Tree s to ASM's bytecode representation. 随着新GenBCode后端的引入，icode格式已不复存在，该后端直接从scalac Tree到ASM的字节码表示形式。 If I were you, I wouldn't invest time in learning it. 如果我是你，我不会花时间去学习它。

Instead, I suggest you print after cleanup instead ( -Xprint:cleanup ), which is the last phase before the backend, with scalac Trees, which are very easy to understand because they're basically Java code with a Scala syntax. 相反，我建议您使用scalac Trees在cleanup （ -Xprint:cleanup ）进行打印（ -Xprint:cleanup ），这是后端之前的最后一个阶段，这很容易理解，因为它们基本上是带有Scala语法的Java代码。

That said, if you insist on dealing with icode , I don't think there's any real documentation about it. 就是说，如果您坚持要使用icode ，那么我认为没有任何真正的文档。 But it almost has a one-to-one correspondance with the JVM bytecode: it has classes, fields and methods. 但是它几乎与JVM字节码一一对应：它具有类，字段和方法。 And inside methods, there is a stack-based instruction set. 在方法内部，有一个基于堆栈的指令集。