[PATCH] D52797: Clear LoopToAliasSetMap when outermost loop is deleted

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

The commit message should refer to https://bugs.llvm.org/show_bug.cgi?id=31141 (assuming this patch fixes that bug).



================
Comment at: lib/Transforms/Scalar/LICM.cpp:1600
+  if (!L->getParentLoop())
+    LICM.getLoopToAliasSetMap().clear();
+
----------------
Need an explanation here for why we're clearing the map in exactly these circumstances. It isn't obvious that we won't lose useful cached information, or that we don't need to clear the map if the loop has a parent.


Repository:
  rL LLVM

https://reviews.llvm.org/D52797