const regexp.visitedBits

8 uses

	regexp (current package)
		backtrack.go#L31: 	visitedBits        = 32
		backtrack.go#L89: 	visitedSize := (len(prog.Inst)*(end+1) + visitedBits - 1) / visitedBits
		backtrack.go#L91: 		b.visited = make([]uint32, visitedSize, maxBacktrackVector/visitedBits)
		backtrack.go#L122: 	if b.visited[n/visitedBits]&(1<<(n&(visitedBits-1))) != 0 {
		backtrack.go#L125: 	b.visited[n/visitedBits] |= 1 << (n & (visitedBits - 1))