[RS4GC] Use AssertingVH for RematerializedValueMapTy, NFCI

Reviewers: reames, swaroop.sridhar

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D13489

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@249620 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed