During December 2024, contributed to the espressif/llvm-project repository by implementing SPIR-V backend support for the cl_intel_subgroup_local_block_io extension. This work enabled block read and write operations on __local memory, enhancing compatibility with Intel subgroup features. The approach involved updating SPIR-V builtins to recognize the new extension and developing automated tests to ensure accurate translation of these operations to SPIR-V. Utilizing C++, LLVM IR, and OpenCL, the changes improved verification coverage and reduced integration risk for downstream projects. The focus on compiler development and low-level programming strengthened the SPIR-V backend’s alignment with the broader roadmap for Intel subgroup support.