Segher Boessenkool
GCC Maintainer at IBM
Delft, South Holland, Netherlands
Summary
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SeniorSegher Boessenkool is a seasoned compiler engineer with 26 years of low-level systems experience, currently serving as GCC maintainer for the Power ISA (rs6000) port and the instruction combiner pass at IBM. He specializes in "down-to-the-metal" work—firmware, backend code generation, and architecture-specific optimizations—regularly fixing tricky bugs involving 64-bit registers, VSX instructions, and bootstrap issues. Based in Delft, he blends long-term contracting experience with corporate R&D, bringing pragmatic engineering to open-source compiler maintenance. Notably, his contributions to the widely used GCC mirror focus on testcase hardening and CPU-selection optimizations that improve real-world code generation for PowerPC targets.
26 years of coding experience
4 years of employment as a software developer
Github Skills (11)
c1710
code-optimization10
powerpc10
assembly10
c1110
back-end-development10
gcc10
compiler-development10
assemble9
assembler9
test-suite8
Programming languages (5)
Github contributions (5)
gcc-mirror/gcc
Apr 2020 - Apr 2022
Role in this project:
Back-end Developer
Back-end DeveloperContributions:37 commits in 2 years
Contributions summary:Segher primarily contributes to the GCC compiler, focusing on the rs6000 (PowerPC) architecture. Their work involves fixing bugs and improving code related to the rs6000 backend, including handling 64-bit registers, VSX instructions, and bootstrap issues. The contributions also include testcase enhancements and optimizations, particularly related to CPU selection, built-in functions, and code generation.
RebeccaRGB/unununium
Aug 2008 - May 2010
Contributions:371 commits in 1 year 8 months
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