107     memset(p->is_used_, 0, sizeof(p->is_used_));  in VP8LHistogramInit()
362                      NULL, &p->is_used_[0])  in VP8LHistogramEstimateBits()
363       + PopulationCost(p->red_, NUM_LITERAL_CODES, NULL, &p->is_used_[1])  in VP8LHistogramEstimateBits()
364       + PopulationCost(p->blue_, NUM_LITERAL_CODES, NULL, &p->is_used_[2])  in VP8LHistogramEstimateBits()
365       + PopulationCost(p->alpha_, NUM_LITERAL_CODES, NULL, &p->is_used_[3])  in VP8LHistogramEstimateBits()
366       + PopulationCost(p->distance_, NUM_DISTANCE_CODES, NULL, &p->is_used_[4])  in VP8LHistogramEstimateBits()
383                               a->is_used_[0], b->is_used_[0], 0);  in GetCombinedHistogramEntropy()
403       GetCombinedEntropy(a->red_, b->red_, NUM_LITERAL_CODES, a->is_used_[1],  in GetCombinedHistogramEntropy()
404                          b->is_used_[1], trivial_at_end);  in GetCombinedHistogramEntropy()
408       GetCombinedEntropy(a->blue_, b->blue_, NUM_LITERAL_CODES, a->is_used_[2],  in GetCombinedHistogramEntropy()
409                          b->is_used_[2], trivial_at_end);  in GetCombinedHistogramEntropy()
414                          a->is_used_[3], b->is_used_[3], trivial_at_end);  in GetCombinedHistogramEntropy()
419                          a->is_used_[4], b->is_used_[4], 0);  in GetCombinedHistogramEntropy()
510                      &h->is_used_[3]);  in UpdateHistogramCost()
512       PopulationCost(h->distance_, NUM_DISTANCE_CODES, NULL, &h->is_used_[4]) +  in UpdateHistogramCost()
516       PopulationCost(h->literal_, num_codes, NULL, &h->is_used_[0]) +  in UpdateHistogramCost()
519       PopulationCost(h->red_, NUM_LITERAL_CODES, &red_sym, &h->is_used_[1]);  in UpdateHistogramCost()
521       PopulationCost(h->blue_, NUM_LITERAL_CODES, &blue_sym, &h->is_used_[2]);  in UpdateHistogramCost()
597     if (!histo->is_used_[0] && !histo->is_used_[1] && !histo->is_used_[2]  in HistogramCopyAndAnalyze()
598         && !histo->is_used_[3] && !histo->is_used_[4]) {  in HistogramCopyAndAnalyze()