[clang] [clang-tools-extra] [clang][modules] Serialize `CodeGenOptions` (PR #146422)

[Ben Langmuir via cfe-commits]

benlangmuir wrote:

> Ok, so what do you suggest? Change all CODEGENOPT to BENIGN_CODEGENOPT before this PR lands?

This would be fine with me.

> (Or alternatively/equivalently go all the way and add an explicit benign effect on AST argument to CODEGENOPT, similar to what I linked above for LangOptions?) 

This would also be fine with me. I don't have a strong preference either way.



https://github.com/llvm/llvm-project/pull/146422