This patch changes the saved IRBuilder insert point from BasicBlock::iterator to AssertingVH.

Commit 185883 fixes a bug in the IRBuilder that should fix the ASan bot. AssertingVH can help in exposing some RAUW problems.

Thanks Ben and Alexey!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185886 91177308-0d34-0410-b5e6-96231b3b80d8