bda9ca3 [NFC][X86][MCA] AMD Zen 3: add tests with non-eliminatible MMX moves

Authored and Committed by Roman Lebedev 2 years ago
    [NFC][X86][MCA] AMD Zen 3: add tests with non-eliminatible MMX moves
    
    In Zen3, MMX moves are *not* eliminated,
    i've verified this with llvm-exegesis.