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Remove redundant *_or_null checks; NFC

Description

Remove redundant *_or_null checks; NFC

For the first one, we dereference NewDef right before the if anyway.
For the second, we shouldn't have NULL users().

Details

Committed
gbivJul 12 2018, 2:56 PM
Parents
rL336951: [X86] Add AVX512 equivalents of some isel patterns so we get EVEX instructions.
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