llvm-project

ef403f9a - [CGData] Document for llvm-cgdata (#106320)

[CGData] Document for llvm-cgdata (#106320) This is a follow-up for https://github.com/llvm/llvm-project/pull/101461. This is a patch for https://discourse.llvm.org/t/rfc-enhanced-machine-outliner-part-2-thinlto-nolto/78753.