[llvm-branch-commits] Change inSectionBlame to return pair<uint, uint> (FileIdx, LineNo). (PR #141540)

[Qinkun Bao via llvm-branch-commits]

https://github.com/qinkunbao created https://github.com/llvm/llvm-project/pull/141540

Accoring to the discussion in
https://github.com/llvm/llvm-project/pull/140529, we need to SSCL can be
created from multiple ignore list files, so we can repeat
-fsanitize-ignorelist=. The change is necessary to achieve the feature
described in https://github.com/llvm/llvm-project/issues/139128.