[clang] [TBAA] Don't emit pointer-tbaa for void pointers. (PR #122116)

[John McCall via cfe-commits]

rjmccall wrote:

Okay, so if the ultimate pointee type is `void`, we're basically treating that as a generic pointer, no matter what the pointer depth is?  I guess that makes sense.

> What would be a good place to document this?

Hmm, I was hoping that we would have a section in the manual already about aliasing. That seems like a good thing to add, especially now that we've got a small family of options controlling it. Are you interested in working on that? It should probably go on the main manual page right before the section on PGO. 

https://github.com/llvm/llvm-project/pull/122116