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1 | Problem: By returning p->forw, we kill the std's operand, which in turn |
2 | causes the std to be deleted the next time around. | |
3 | We WANT this to occur, however, if there are no more | |
4 | uses of r0 or r1 between q and the original uses[r]. | |
5 | So we must loop in flops() until we run out of uses. |