[analyzer] Weaken assertion in trackNullOrUndefValue()
We should ignore paren casts when making sure that the semantic expression
in a PseudoObjectExpr for an ObjC getter is a message send.
This has no other intended functionality change.
Adding a test for this exposed an interesting issue in another test case
that only manifests under ARC. trackNullOrUndefValue() is not properly
suppressing for nil values that are the result of nil propagation from a nil
receiver when the nil is returned from a function. I've added a FIXME for that
missing suppression.
rdar://problem/27290568
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@279181 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit 1319614c1b7fd72d64c7561b89f3b9872a4f7a69)
2 files changed
