[PATCH] D42854: [AMDGPU] Suppress redundant waitcnt instrs

[Tony Tye via Phabricator via llvm-commits]

t-tye added a comment.

A concern is that you do not want to remove an original waitcnt when inserting a new one, as the pass may iterate and subsequently decide not to add a waitcnt there, but will have eliminated a waitcnt needed to implement the memory model. Is that an issue?


https://reviews.llvm.org/D42854