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
If the branch was on a read-undef of vcc, passes that used analyzeBranch to invert the branch condition wouldn't preserve the undef flag resulting in a verifier error. Fixes verifier failures in a future commit. Also fix verifier error when inserting copy for vccz corruption bug. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@286133 91177308-0d34-0410-b5e6-96231b3b80d8