Worked on aligning the onnx/onnx-mlir repository with the latest LLVM release, focusing on compatibility and correctness across ONNX operations and MLIR dialects. Addressed the LLVM 43.x upgrade by updating TOSA dialect operations, NNPA accelerator conversions, and general MLIR dialect handling using C++ and Shell scripting. The approach involved comprehensive validation through continuous integration and testing to ensure stability and prevent regressions. This work minimized upgrade risks and stabilized builds, enabling downstream teams to adopt newer LLVM versions confidently. Demonstrated expertise in compiler development, LLVM, and ONNX Runtime, delivering robust feature integration within a complex codebase.