During October 2025, Jingze Xia focused on stability improvements in the ROCm/llvm-project repository, addressing a critical bug in the AArch64 backend. He engineered a targeted fix in the PostCoalescerPass to ensure correct propagation of the 'undef' flag during register replacement, preventing undefined flag loss and reducing compilation crashes. By introducing a new field in AArch64MachineFunctionInfo to track streaming mode changes, he enabled more accurate context handling. Working primarily in C++ and LLVM IR, Jingze applied his expertise in AArch64 architecture and compiler development to enhance code generation reliability, demonstrating depth in low-level systems engineering and LLVM pass development.