[PATCH] D147020: [AA] Add a tbaa-fence intrinsic.

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

For perf, maybe bootstrap LLVM?  I think LLVM itself uses placement new in a number of places...

I hadn't really considered the memory being dead after placement new, but the only optimization that would really open up is dead store elimination, I think?  Not sure how important that is; we currently don't do that optimization anyway.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D147020/new/

https://reviews.llvm.org/D147020