[PATCH] D62536: Only passes that preserve MemorySSA must mark it as preserved.

[Alina Sbirlea via Phabricator via llvm-commits]

asbirlea added a comment.

I wasn't yet able to reproduce this with `opt -aa-pipeline=default -passes="default<O3>"`, only with `clang -cc1 -O3 -fexperimental-new-pass-manager`.
I'll keep working on getting a test, but I checked this in for now, since it's necessary to fix crashes for the combination of MemorySSA + NewPassManager.


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D62536/new/

https://reviews.llvm.org/D62536