Approved by Chris:

$ svn merge -c 113820 https://llvm.org/svn/llvm-project/llvm/trunk
--- Merging r113820 into '.':
U    test/Transforms/LICM/crash.ll
U    lib/Transforms/Scalar/LICM.cpp

Log:
fix PR8102, a case where we'd copyValue from a value that we already
deleted.  Fix this by doing the copyValue's before we delete stuff!

llvm-svn: 113823