Michael Spencer
Compiler Engineer at Apple
Redwood City, California, United States
Summary
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Rockstar🎓
Top SchoolMichael Spencer is a compiler engineer with 15 years of experience designing and refining compiler tooling for high-performance platforms, currently building compiler technology at Apple from Redwood City. His work spans deep frontend and driver-level changes in Clang—refactoring option parsing, adding command-line prefixes, and improving MSVC intrinsic support—reflecting a pragmatic focus on maintainable, production-grade compiler internals. He progressed from hands-on engineering roles at Sony and startups to leading the Clang team at Apple, blending individual contributor craftsmanship with brief management experience. Known for contributing to the canonical LLVM/Clang mirror, he brings both long-term stewardship of foundational open-source infrastructure and a track record of shipping robust compiler features used across large codebases.
16 years of coding experience
13 years of employment as a software developer
Gainesville State College
Github Skills (13)
compiler10
compiler-compiler10
c-language10
driver10
clangd10
cprogramming-language10
clang10
api8
apim8
api-design8
backend8
cplus7
cpp7
Programming languages (15)
Github contributions (5)
llvm-mirror/clang
Jul 2010 - Oct 2019
Mirror kept for legacy. Moved to https://github.com/llvm/llvm-project
Role in this project:
Back-end Developer
Back-end DeveloperContributions:78 commits in 9 years 4 months
Contributions summary:Michael primarily focused on modifying and updating the Clang compiler's internal components. Their contributions involved making changes to the option processing, specifically refactoring and enhancing the `Option` class. These modifications extended to the driver, tools, and front-end code, where they added support for prefixes, integrated new command-line options and refined how options were parsed and utilized within the Clang infrastructure. The user also updated internal components related to MSVC intrinsics.
llvmcompilerc-plus-pluscobjective-c
Bigcheese/llvm-project
Dec 2019 - Jun 2026
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies. Note: the repository does not accept github pull requests at this moment. Please submit your patches at http://reviews.llvm.org.
Contributions:87 pushes, 92 branches in 6 years 7 months
compilerstechnologiesclangbazelsubmit
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