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23f07450a2
"PredicatesFoldable" returns false for signed/unsigned mismatched pairs, so these cases should never exist. We'll default to 'unreachable' on those predicate combos instead. Most of what's left in these switches belongs in InstSimplify (and may already be there), so there's probably more that can be done to reduce this code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@299829 91177308-0d34-0410-b5e6-96231b3b80d8
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