[RewriteStatepointsForGC] Delete trivial code

A bit more code cleanup: delete some a trivial true assertion and supporting code, remove a redundant cast, and use count in assertions where feasible.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242805 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed