The LLVM code representation is designed to be used in three different forms: as an in-memory compiler IR, as an on-disk bitcode representation (suitable for fast loading by a Just-In-Time compiler), and as a human readable assembly language representation.

LLVM IR is the backbone that connects frontends and backends, allowing LLVM to parse multiple source languages and generate code to multiple targets. Frontends produce the IR, while backends consume it. The IR is also the point where the majority of LLVM target-independent optimizations takes place.

2021年7月20日 · LLVM IR（Intermediate Representation）是一种中间语言表示，作为编译器前端和后端的分水岭。 LLVM 编译器的前端——Clang 负责产生 IR，而其后端负责消费 IR。 编译器 IR 的设计体现了 权衡 的计算思维。 低级的 IR（即更接近目标代码的 IR）允许编译器更容易地生成针对特定硬件的优化代码，但不利于支持多目标代码的生成。 高级的 IR 允许优化器更容易地提 …

2023年8月1日 · LLVM IR is very popular, and as such well-documented and reasonably well-specified, to the point that we can just treat it as a slightly weird programming language. In this article, I want to dig into what LLVM IR is and how to read it. What’s LLVM IR?

The MLIR Language Reference describes the High Level Structure, this document illustrates this structure through examples, and introduces at the same time the C++ APIs involved in manipulating it. We will implement a pass that traverses …

5 天之前 · This chapter shows you how to transform the Abstract Syntax Tree, built in Chapter 2, into LLVM IR. This will teach you a little bit about how LLVM does things, as well as demonstrate how easy it is to use. It’s much more work to build a lexer and parser than it …

What is the LLVM IR? The LLVM Intermediate Representation: Is a low level programming language – RISC-like instruction set … while being able to represent high-level ideas. – i.e. high-level languages can map cleanly to IR. Enables efficient code optimization

我们可以将自己语言的源代码编译成LLVM中间代码（LLVM IR），然后由LLVM自己的后端对这个中间代码进行优化，并且编译到相应的平台的二进制程序。 LLVM的优点正好对应我们之前讲的三个问题： 因为LLVM的优越性，除了LLVM自己研发的C编译器 Clang，许多新的工程都选择了使用LLVM，我们可以在 其官网 看到使用LLVM的项目的列表，其中，最著名的就是Rust、Swift等 …

2020年12月24日 · We'll explain the concepts underlying LLVM IR, and how you can use the LLVM C++ API in your programming language's compiler.

2024年12月1日 · LLVM IR is LLVM Intermediate Representation, which is a Low-level language is a RISC-like instruction set. However, it is possible to express high-level ideas, that is, high-level languages can...