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

[Florian Hahn via cfe-commits]

fhahn wrote:

> > ping :) @AaronBallman WDYT re making this clear in the release notes (also that there's an easy way to disable) + the ongoing work in parallel for the type sanitizer?
> 
> I think it's a reasonable experiment to try.
> 
> I would call it a potentially breaking change because it's possible this will quietly change code behavior, though.

Thanks, I moved the release note to the 'Potentially Breaking Changes' section and included a sentence that this may silently change code behavior for code that has strict-aliasing violations.

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