Worked on the espressif/llvm-project repository to enhance the reliability of the ARM toolchain by addressing a critical bug in the handling of M-profile Vector Extension floating-point features. Focused on compiler development and embedded systems, the developer implemented logic in C and C++ to ensure that the MVE FP feature is correctly disabled when specific -mfpu options are set, preventing unintended activation alongside scalar floating-point operations. This targeted fix improved code generation correctness and reduced build failures, directly supporting stable releases for Espressif devices. The work demonstrated careful attention to cross-architecture compatibility and robust backend feature gating within Clang/LLVM.