David Truby
Senior Software Engineer at Arm
Stevenage, England, United Kingdom
Summary
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Rockstar🎓
Top SchoolDavid Truby is a Senior Software Engineer based in Stevenage with 13 years of experience building compiler and backend systems at Arm. He brings deep expertise in compiler engineering, contributing to LLVM's flang front-end with work on Fortran features like VECTOR ALWAYS, -mcmodel support, new intrinsics, and runtime dependency reductions. At Arm he has progressed from Software Engineer to senior levels, delivering optimizations and driver improvements that bridge language semantics and low-level code generation. Known for pragmatic problem solving, he focuses on removing fragile runtime dependencies and improving toolchain robustness. His background from the University of Warwick underpins a methodical approach to complex system design and performance tuning. He combines long-term open-source collaboration on a high-profile project with production-grade engineering at a leading silicon and software company.
13 years of coding experience
1 year of employment as a software developer
University of Warwick
Github Skills (8)
fortran10
compiler-design10
intrinsics10
llvm10
openmp9
arm9
clang8
clangd8
Programming languages (13)
Github contributions (5)
llvm/llvm-project
Aug 2022 - Jan 2023
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.
Role in this project:
Back-end Developer & Compiler Engineer
Back-end Developer & Compiler EngineerContributions:187 reviews, 6 commits, 93 PRs in 5 months
Contributions summary:David primarily contributed to the flang compiler, focusing on the Fortran language front-end and compiler optimizations. Their work includes implementing and refining language features such as the `VECTOR ALWAYS` directive and the `-mcmodel` flag. The user also addressed issues related to runtime dependencies, like removing C++ runtime dependencies from the Sleep extension. In addition to these, the user worked on implementing new intrinsics and improving driver functionality.
compilerllvmtoolchain
DavidTruby/f18
Aug 2019 - Oct 2019
F18 is a front-end for Fortran intended to replace the existing front-end in the Flang compiler
Contributions:29 pushes, 7 branches in 1 month
fortrancompilerfront-end
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