Junfeng Deng enhanced the reliability of the espressif/llvm-project repository by addressing a critical issue in the MLIR inliner. He focused on preventing infinite loops caused by indirect recursive calls, such as scenarios where function A calls B, which then calls A. Using C++ and MLIR, Junfeng analyzed the inlining logic, implemented safeguards to detect non-inlinable indirect recursion, and updated the code to avoid problematic inlining patterns. He also developed targeted regression tests to validate the fix and expanded CI coverage. This work improved the stability of the MLIR inliner, especially in complex call graphs, and strengthened overall compiler robustness.