Yuanfang Chen 1948b58c36 [NewPM] collapsing nested pass mangers of the same type
This is one of the reason for extra invalidations in D84959. In
practice, I don't think we have use cases needing this. This simplifies
the pipeline a bit and prune corner cases when considering
invalidations.

Reviewed By: asbirlea

Differential Revision: https://reviews.llvm.org/D85676
2020-10-04 15:57:13 -07:00
..
2020-09-03 13:03:44 -07:00