Jeffrey Byrnes
Sr. Software Engineer (Compiler) at AMD
Davis, California, United States
Summary
🤩
Rockstar🎓
Top SchoolJeffrey Byrnes is a senior compiler engineer with 11 years of experience specializing in LLVM-based code generation and optimization for AMDGPU targets. At AMD he progressed from co-op to Senior Software Engineer, contributing practical improvements to shufflevector handling, GEP reordering, vector instruction support, and register pressure calculations. He pairs an MS in Computer Science with a foundational B.A.S in Economics and Applied Statistics, giving him strong analytical instincts for performance and correctness trade-offs. Jeffrey has modernized legacy compiler algorithms—parallelizing cores and cutting compile and runtime costs—demonstrating both research-driven and production-focused impact. An active contributor to the widely used llvm/llvm-project, he blends low-level systems expertise with data-driven intuition and a habit of iterating on tooling and tests to lock in correctness. Outside work he pursues data analysis projects and algorithm development, a hobby that drives continual skill growth.
11 years of coding experience
4 years of employment as a software developer
B.A.S Economics and Applied Statistics, B.A.S Economics and Applied Statistics at University of California, DavisCalifornia State University, Sacramento
Github Skills (7)
compiler-optimization10
code-generation10
c-language10
amdgpu10
cprogramming-language10
llvm10
machine-code9
Programming languages (4)
Github contributions (5)
llvm/llvm-project
Jan 2023 - Jan 2023
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.
Role in this project:
Backend Developer
Backend DeveloperContributions:211 reviews, 1 commit, 129 PRs in 1 day
Contributions summary:Jeffrey contributed to the LLVM compiler project, specifically focusing on optimizing code generation for AMDGPU architecture. Their work involved modifying and adding tests to the compiler to improve the handling of shufflevector operations and GEP reordering. They also addressed bugs and added improvements to code related to vector instructions and memory operations. Additionally, the user made changes to the register pressure calculations.
compilerstechnologiesclangsubmittoolchain
jrbyrnes/llvm-project
Jan 2022 - Mar 2025
This is the canonical git mirror of the LLVM subversion repository. The repository does not accept github pull requests at this moment. Please submit your patches at http://reviews.llvm.org.
Contributions:7 PRs, 621 pushes, 198 branches in 3 years 2 months
idriscompilerssubversionclanglibgit2
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