b7286dbef9
The last attempt failed a sanitiser build because we were creating a reference to a null Predicates pointer in isDereferenceableAndAlignedInLoop. This was exposed by the unit test IsDerefReadOnlyLoop in unittests/Analysis/LoadsTest.cpp. I fixed this by falling back on getConstantMaxBackedgeTakenCount if Predicates is null - see line 316 in llvm/lib/Analysis/Loads.cpp. There are no other changes.