[PATCH] D31994: Simplify idempotent invariant.group.barriers

[Davide Italiano via Phabricator via llvm-commits]

davide added a comment.

I'm not entirely sure about how this patch is implemented. Maybe you want to capture the fact this is idempotent inside the function?  Otherwise using this in other places of the file becomes error prone as every caller has to check that the Instruction has only one use.


https://reviews.llvm.org/D31994