QBE – Compiler Back end: Version 1.3
4 hours ago
- #QBE compiler update
- #new features
- #optimization improvements
- QBE 1.3 is a major release with 7k new lines of code and 1.5k deleted, including bug fixes, a new IL matching algorithm, Windows ABI support, and position-independent code generation.
- Optimizations were driven by coremark benchmark analysis, focusing on functions ee_isdigit and crcu8, leading to improved performance (63% of commercial compilers) and Hare test suite improvements (33% faster).
- A new OCaml tool, mgen, automates IL pattern matching via metaprogramming, replacing hand-written logic and enabling future backend simplifications.
- Windows ABI support added via Scott Graham's contribution, allowing compilation with -t amd64_win.
- Enhanced position-independent code support through a new DYNCONST flag for indirect global access, enabling shared object production.