Sohu Tech Products

Jan 8, 2020 · Backend Development

Understanding Swift SIL: Exploring LLVM Backend and Protocol Extension Implementation

This article explains how Swift leverages LLVM's three‑stage compiler architecture and the Swift Intermediate Language (SIL) to implement protocol extensions, detailing the generation and analysis of SIL code, VTables, Witness Tables, and function calls to reveal the language's underlying compilation process.