[clang] [Clang] Enable -fpointer-tbaa by default. (PR #117244)

[John McCall via cfe-commits]

https://github.com/rjmccall commented:

This seems reasonable to me. Since it's standards-compliant, has a specific opt-out flag, and is overridden by the general `-fno-strict-aliasing` flag, I don't see any need for the RFC process. Still, you should definitely wait for more feedback, especially from @AaronBallman.

This is not a prerequisite for landing the patch — or a requirement at all, for that matter — but I think it'd be great if you could make a sort of capstone post on the forums talking about this work and your performance analysis in more detail.

https://github.com/llvm/llvm-project/pull/117244