[PATCH] D89847: [SCEV] Drop cached ranges of AddRecs after flag update

[Max Kazantsev via Phabricator via llvm-commits]

mkazantsev added inline comments.


================
Comment at: llvm/lib/Analysis/ScalarEvolution.cpp:5360
+    UnsignedRanges.erase(AddRec);
+    SignedRanges.erase(AddRec);
+  }
----------------
nikic wrote:
> Could it happen that other ranges have been computed in the meantime, based on the now outdated addrec range?
Unfortunately yes. But tracking them would be expensive.


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  https://reviews.llvm.org/D89847/new/

https://reviews.llvm.org/D89847