226                 SkOpSpanBase* checkSpan = fHead.next();  in addAlignIntersection()
251     if ((start == &fHead && end == &fTail) || (start == &fTail && end == &fHead)) {  in addCurveTo()
260     bool reverse = ePtr == fPts && start != &fHead;  in addCurveTo()
303     SkOpSpanBase* test = &fHead;  in addMissing()
326     SkOpSpanBase* span = &fHead;  in addT()
387     SkOpSpanBase* span = &fHead;  in align()
401         SkOpSpan* span = &fHead;  in align()
412     bool activePrior = !fHead.isCanceled();  in calcAngles()
413     if (activePrior && !fHead.simple()) {  in calcAngles()
416     SkOpSpan* prior = &fHead;  in calcAngles()
417     SkOpSpanBase* spanBase = fHead.next();  in calcAngles()
442     return fVerb == SkPath::kLine_Verb && fHead.pt() == fTail.pt();  in collapsed()
605     if (fHead.contains(&fTail)) {  in findCollapsed()
608         fHead.alignEnd(0, fHead.pt());  in findCollapsed()
904     SkOpSpan* zeroSpan = &fHead;  in init()
1200     SkOpSpanBase* spanBase = &fHead;  in missingCoincidence()
1219             if (spanBase == &fHead) {  in missingCoincidence()
1286                 clear_visited(&fHead);  in missingCoincidence()
1295     clear_visited(&fHead);  in missingCoincidence()
1302     SkOpSpanBase* test = &fHead;  in moveMultiples()
1380                     if (oppTest == &oppSegment->fTail || oppTest == &oppSegment->fHead) {  in moveMultiples()
1381                         SkASSERT(oppSpan != &oppSegment->fHead); // don't expect collapse  in moveMultiples()
1404     SkOpSpanBase* spanS = &fHead;  in moveNearby()
1412             } else if (spanS != &fHead) {  in moveNearby()
1432                             if (spanS == &fHead) {  in moveNearby()
1506     SkOpSpanBase* span = &this->fHead;  in sortAngles()