[RewriteStatepointsForGC] minor style cleanup

Use a named lambda for readability, common some code, remove a stale comments, and use llvm style variable names.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242827 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed