Worked on the rust-lang/gcc repository to resolve a critical internal compiler error affecting the RX target, specifically related to frame pointer omission during compilation. Addressed the issue by refining stack frame and frame pointer handling in the C++ codebase, ensuring that accurate debugging information is generated for embedded systems development. Introduced a targeted regression test to safeguard against future occurrences of this bug, thereby improving the reliability of cross-target builds. The work demonstrated strong skills in compiler development and debugging, focusing on stability and maintainability for embedded platforms, and contributed to more predictable and robust build processes for the RX architecture.