[PATCH] D45910: [BasicAA] Don't assume a PHI node has inputs

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

Sorry I meant it became unreachable during jump threading. And jump threading itself created the degenerate phi. The call into alias analysis also came from jump threading from SimplifyPartiallyRedundantLoad.

But we do have our own internal changes in jump threading so its still possible that this is a problem there.

I found other code that handles phis with no incoming values in the phi handling in computeKnownBitsFromOperator. That code is exercised by 3 lit tests, 2 of them due to jump threading.


https://reviews.llvm.org/D45910