Robert Imschweiler
Compiler Engineer at AMD
Munich, Bavaria, Germany
Summary
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Rockstar🎓
Top SchoolRobert Imschweiler is a compiler engineer at AMD with six years of hands-on experience building and hardening compiler toolchains, particularly contributing backend fixes for the high-profile LLVM project and the AMDGPU target. He brings practical expertise in OpenMP/offload in LLVM, GlobalISel, and intrinsic verification, grounded in a strong research background from a Master’s thesis analyzing cache replacement policies and side-channel vulnerabilities on ARM. Based in Munich, he has a track record of shipping production-grade tooling and automated infrastructure—from scaling a Zulip instance to 13,000+ users to automating pentest tooling at ETAS—and enjoys improving developer workflows. Methodical and detail-oriented, he pairs low-level hardware debugging experience (JTAG/SWD) with compiler internals to close the gap between hardware behavior and correct code generation.
6 years of coding experience
Master's degree Computer Science, Master's degree Computer Science at Technical University of Munich
German, English, French
Stackoverflow
1reputation
0reached
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Github Skills (10)
compiler-design10
c-language10
amdgpu10
gpgpu10
cprogramming-language10
llvm10
testing9
assembly8
assembler8
assemble8
Programming languages (9)
Github contributions (5)
llvm/llvm-project
Jun 2022 - Jul 2026
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:150 reviews, 48 PRs, 107 pushes in 4 years 1 month
Contributions summary:Robert focused on fixing and improving the LLVM compiler infrastructure, specifically related to the AMDGPU target. They addressed issues in GlobalISel related to undefined register handling and incorrect lowering of workitem intrinsics within the SelDAG and GlobalISel pipelines. Furthermore, the user enhanced the verification process for the `amdgcn.cs.chain` and `amdgcn.init.exec.from.input` intrinsics, ensuring better code correctness and error detection. Their contributions primarily involved modifying compiler code, test cases, and verification tools.
compilerllvmtoolchain
ro-i/scripts
Oct 2020 - Apr 2025
Contributions:48 pushes, 1 branch in 4 years 6 months
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