Sam Elliott 6309cd8668
Revert "[NFC][MI] Tidy Up RegState enum use (1/2)" (#176190)
Reverts llvm/llvm-project#176091

Reverting because some compilers were erroring on the call to
`Reg.isReg()` (which is not `constexpr`) in a `constexpr` function.
2026-01-15 07:58:05 -08:00
..