[BDCE] Skip metadata while replacing uses.
The fix committed in r288851 doesn't cover all the cases.
In particular, if we have an instruction with side effects
which has a no non-dbg use not depending on the bits, we still
perform RAUW destroying the dbg.value's first argument.
Prevent metadata from being replaced here to avoid the issue.
Differential Revision: https://reviews.llvm.org/D27534
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@288987 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed