Worked on the swiftlang/llvm-project repository to address a bug in Crash Instrumentation affecting IR dump output. Focused on compiler development and LLVM pass development using C++ and LLVM IR, the work involved modifying the IR dump process so that output begins with a semicolon, ensuring it is treated as a comment and does not interfere with subsequent IR processing. Updated and expanded the associated test suite to align with the new behavior, which improved the reliability of continuous integration workflows. This targeted bug fix enhanced the stability of IR representation during crash scenarios and demonstrated careful attention to testing practices.