[clang] [compiler-rt] [llvm] [clang][llvm][rtsan] Introduce RealtimeSanitizer clang codegen, llvm attributes (PR #100120)

[Vitaly Buka via cfe-commits]

vitalybuka wrote:

Can we split into 3 patches?
1. LLVM
2. Clang
3. Compiler-rt



https://github.com/llvm/llvm-project/pull/100120