Daniel Sanders
Compiler Engineer at Apple
San Francisco Bay Area United States
Summary
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Rockstar🎓
Top SchoolDaniel Sanders is a compiler engineer with 12 years of experience, currently shaping compiler back-ends at Apple from the San Francisco Bay Area. He has deep LLVM/Clang expertise—contributing to instruction selection, DWARF/debug info, and MIPS-specific builtins and assembler support—demonstrating low-level knowledge of ISA details and toolchain internals. Previously a lead software design engineer at Imagination Technologies, he pairs production-grade compiler feature work with build-system and automation improvements (notably CMake and pocl portability). Comfortable across TableGen, GlobalISel, and assembler integrations, he brings a practical blend of systems engineering and attention to obscure platform quirks like MSA and floating-point ABI options.
13 years of coding experience
10 years of employment as a software developer
BSc (Hons) Computer Science, BSc (Hons) Computer Science at University of Bath
Github Skills (31)
debugging10
assembly10
c-language10
dwarf10
architecture10
computer-architecture10
llvm10
cmake10
c1110
pattern-matching10
codegen10
c1710
code-generation10
compiler-design10
assemble10
Programming languages (6)
Github contributions (5)
apple/swift-llvm
Jan 2017 - Dec 2017
Role in this project:
Back-end Developer
Back-end DeveloperContributions:105 commits, 2 pushes in 11 months
Contributions summary:Daniel primarily contributed to the GlobalISel (GISel) instruction selection framework within the LLVM project. Their work focused on improving the pattern matching capabilities of GISel, including the addition of atomic operations, immediate operand support, and the integration of complex patterns, indicating a deep involvement in compiler back-end development. These changes involved modifying TableGen files and implementing new predicates, renderers, and actions to extend the framework. Furthermore, they improved the functionality and correctness of the code, which is critical for generating optimized machine code.
llvm/llvm-project
Aug 2019 - Feb 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:17 reviews, 25 PRs, 91 pushes in 6 years 6 months
Contributions summary:Daniel primarily contributes to the LLVM project, focusing on compiler and toolchain technologies. Their work includes fixing bugs, and implementing new features related to instruction selection and debugging information generation. The user modified the instruction selection process to use `GISelChangeObserver` instead of `MachineFunction::Delegate`. The user also added a new CFI directive and corrected code related to Metal Shading Language support in the dwarf files.
compilerllvmtoolchain
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