[PATCH] D24693: [CodeGen] Don't emit lifetime intrinsics for some local variables

[Evgeniy Stepanov via cfe-commits]

eugenis added a comment.

In https://reviews.llvm.org/D24693#553474, @vitalybuka wrote:

> My assumption is that "start" makes access valid, and "end" makes access invalid, up to the next "start".


That's also my understanding, but LangRef does not say anything about llvm.lifetime.start cancelling the effects of llvm.lifetime.end.

llvm.lifetime.end:
Any stores into the memory object following this intrinsic may be removed as dead.


https://reviews.llvm.org/D24693