2026 EuroLLVM - clang-reforge: Automatic whole-codebase source code rewriting tool for security...

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2026 EuroLLVM Developers' Meeting

https://llvm.org/devmtg/2026-04/

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Title: clang-reforge: Automatic whole-codebase source code rewriting tool for security hardening

Speaker: Jan Korous

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Slides: https://llvm.org/devmtg/2026-04/slides/technical_talk/technical_talk_korous.pdf

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We're building clang-reforge, an automatic source code rewriting tool that enables adoption of bounds-safety in large existing C++ codebases. clang-reforge analyzes source code to identify unsafe pointer operations and capture pointer flow. It replaces built-in pointers with bounds-safe types in pointer flow segments from allocation sites to unsafe operations, such as pointer arithmetic. We have a working internal prototype and we're now rebuilding it on top of clang's Scalable Static Analysis Framework.

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