During June 2025, Gaynor contributed to the llvm/clangir repository by developing a performance-focused optimization for ceiling division by powers of two within the InstCombine pass. Leveraging expertise in C++ and LLVM IR, Gaynor implemented a transformation that replaces a right-shift and conditional-add pattern with a single addition followed by a right shift, provided no intermediate overflow occurs. This approach reduced instruction count and improved code generation quality. Comprehensive tests were added to ensure correctness and handle edge cases, reinforcing safe transformation patterns. The work demonstrated depth in compiler optimization and low-level systems programming, enhancing InstCombine’s optimization coverage and reliability.