[messe]

I wouldn’t quite count it as bit-addressing, but x86, for example, can load bits directly into the carry flag using the BT instruction which can take a register or memory address as it’s first argument, with the bit being given as the second.

[jacquesm]

There have been all kinds of variations on that theme. One of the nicest is 'bit test and set' as an atomic instruction, that one enables a whole raft of nice stuff.