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3920e07f0b
Operand types are now tracked explicitly, so there is no need to reserve ID 0 for the special always-zero counter. As part of the renumbering, this change fixes an off-by-one error in the way counters were counted by the `coverageinfo` query. As a result, functions should now have exactly the number of counters they actually need, instead of always having an extra counter that is never used.