[PATCH] D30726: Do not cache AliasSetTracker even in the old PM

[Daniel Berlin via Phabricator via llvm-commits]

dberlin added a comment.

We definitely have testcases where ASTs (in LICM and elsewhere) take ... forever (hundreds of seconds).

If this makes that worse, it'd be bad, but Alina's working on moving LICM to MemorySSA anyway (and i expect will continue when she gets back).
So if it's a temporary hit, and we need it for correctness, ....


https://reviews.llvm.org/D30726