Worked on stabilizing the NVPTX backend in the espressif/llvm-project repository, focusing on reliability and crash prevention rather than new feature development. Addressed a critical segmentation fault in i128 array processing by implementing a recursive approach that splits array elements into i64 chunks, ensuring safe handling within the NVPTX codepath. Supplemented this fix with comprehensive regression tests to guard against future regressions and maintain production stability. Utilized C++ and LLVM IR for low-level optimization and compiler development, emphasizing robust testing practices. The work demonstrated a methodical approach to resolving complex GPU programming issues and improving backend resilience for production environments.