Worked on the intel/llvm repository to improve AMDGPU backend stability by addressing a critical bug in hardware stage maximum value handling, specifically related to LDS size metadata. Refactored the setHwStage logic into updateHwStageMaximum to ensure correct updates for fields such as .lds_size, preventing zero LDS size in one function from overwriting values in another. Added targeted regression tests to verify metadata integrity and cross-function data isolation, reducing the risk of incorrect code generation and runtime issues. Utilized C++, LLVM IR, and low-level optimization techniques to enhance test coverage and reliability for downstream GPU programming and compiler development workflows.