[PATCH] D27680: [CodeGen] Move lifetime.start of a variable when goto jumps back past its declaration

[Akira Hatanaka via Phabricator via cfe-commits]

ahatanak added a comment.

Ah, good idea. That sounds like a much simpler and less invasive approach. I agree that the performance impact would probably be small, and if it turns out to have a significant impact, we can reduce the number of times we move the lifetime.start (without moving it retroactively) by checking whether a label was seen.

I'll see if I can come with a new patch.


https://reviews.llvm.org/D27680