Paper from EuroSys 2026 proposes a register allocation approach for LLVM-based binary translators that reduces compilation overhead without sacrificing code quality.
Key Takeaways
Binary translation with LLVM (e.g., for cross-ISA emulation) suffers because LLVM’s standard register allocators were designed for ahead-of-time compilation, not dynamic translation.
Register allocation is a known bottleneck in JIT and binary translation pipelines; cheaper allocation directly reduces translation latency and cold-start cost.
The paper targets LLVM-based translators specifically, a category that includes research systems and production tools like FEX-Emu and LLVM-based QEMU backends.
Published at EuroSys 2026 (21st European Conference on Computer Systems), a top-tier peer-reviewed systems venue, so methodology and evaluation are expected to be rigorous.
Practical impact lands on emulation, cross-architecture compatibility layers, and any JIT compiler built on LLVM where compilation speed is a real cost.
