245   const int pix_count = xsize * ysize;  in BackwardReferencesRle()  local
251   for (i = 1; i < pix_count; ++i) {  in BackwardReferencesRle()
271   const int pix_count = xsize * ysize;  in BackwardReferencesHashChain()  local
284   if (!HashChainInit(hash_chain, pix_count)) goto Error;  in BackwardReferencesHashChain()
289   for (i = 0; i < pix_count; ) {  in BackwardReferencesHashChain()
293     if (i < pix_count - 1) {  // FindCopy(i,..) reads pixels at [i] and [i + 1].  in BackwardReferencesHashChain()
294       int maxlen = pix_count - i;  in BackwardReferencesHashChain()
309       if (i < pix_count - 2) {  // FindCopy(i+1,..) reads [i + 1] and [i + 2].  in BackwardReferencesHashChain()
310         int maxlen = pix_count - (i + 1);  in BackwardReferencesHashChain()
344         const int last = (len < pix_count - 1 - i) ? len : pix_count - 1 - i;  in BackwardReferencesHashChain()
361       if (i + 1 < pix_count) {  in BackwardReferencesHashChain()
480   const int pix_count = xsize * ysize;  in BackwardReferencesHashChainDistanceOnly()  local
483       (float*)WebPSafeMalloc((uint64_t)pix_count, sizeof(*cost));  in BackwardReferencesHashChainDistanceOnly()
496   if (!HashChainInit(hash_chain, pix_count)) goto Error;  in BackwardReferencesHashChainDistanceOnly()
508   for (i = 0; i < pix_count; ++i) cost[i] = 1e38f;  in BackwardReferencesHashChainDistanceOnly()
515   for (i = 0; i < pix_count; ++i) {  in BackwardReferencesHashChainDistanceOnly()
524       if (i < pix_count - 1) {  // FindCopy reads pixels at [i] and [i + 1].  in BackwardReferencesHashChainDistanceOnly()
526         if (maxlen > pix_count - i) {  in BackwardReferencesHashChainDistanceOnly()
527           maxlen = pix_count - i;  in BackwardReferencesHashChainDistanceOnly()
558             const int last = (len + i < pix_count - 1) ? len + i  in BackwardReferencesHashChainDistanceOnly()
559                                                        : pix_count - 1;  in BackwardReferencesHashChainDistanceOnly()
570     if (i < pix_count - 1) {  in BackwardReferencesHashChainDistanceOnly()
625   const int pix_count = xsize * ysize;  in BackwardReferencesHashChainFollowChosenPath()  local
639   if (hash_chain == NULL || !HashChainInit(hash_chain, pix_count)) {  in BackwardReferencesHashChainFollowChosenPath()
666         const int last = (len < pix_count - 1 - i) ? len : pix_count - 1 - i;  in BackwardReferencesHashChainFollowChosenPath()
681       if (i + 1 < pix_count) {  in BackwardReferencesHashChainFollowChosenPath()