[clang] [llvm] [CaptureTracking][FunctionAttrs] Add support for CaptureInfo (PR #125880)

[Nikita Popov via cfe-commits]

nikic wrote:

Confirmed that check-clang for a two-stage Windows build with ThinLTO works with the additional changes on https://github.com/llvm/llvm-project/pull/128020.

https://github.com/llvm/llvm-project/pull/125880