57       HPhi* phi = block->phis()->at(j);  in MarkLiveInstructions()  local
58       if (phi->CannotBeEliminated()) MarkLive(phi, &worklist);  in MarkLiveInstructions()
84       HPhi* phi = block->phis()->at(j);  in RemoveDeadInstructions()  local
85       if (!phi->CheckFlag(HValue::kIsLive)) {  in RemoveDeadInstructions()
86         worklist.Add(phi, zone());  in RemoveDeadInstructions()
88         phi->ClearFlag(HValue::kIsLive);  in RemoveDeadInstructions()
95     HPhi* phi = worklist.RemoveLast();  in RemoveDeadInstructions()  local
96     HBasicBlock* block = phi->block();  in RemoveDeadInstructions()
97     phi->DeleteAndReplaceWith(NULL);  in RemoveDeadInstructions()
98     if (phi->HasMergedIndex()) {  in RemoveDeadInstructions()
99       block->RecordDeletedPhi(phi->merged_index());  in RemoveDeadInstructions()