Jan Beulich 6f5ee7a3e9 gas: invoke md_optimize_expr() also for unary expressions ...

Give backends a chance to see these, just as they can see binary ones.
Most of those which use this hook already cope with NULL being passed
for the left operand (typically because of checking the operator first).
Adjust the two which don't.

Take the opportunity and also document the hook.

2023-05-19 09:16:29 +02:00

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