398       HInstruction* merged_value = nullptr;  in MergePredecessorValues()  local
429         if (merged_value == nullptr) {  in MergePredecessorValues()
432           merged_value = pred_value;  in MergePredecessorValues()
433         } else if (pred_value != merged_value) {  in MergePredecessorValues()
435           merged_value = kUnknownHeapValue;  in MergePredecessorValues()
449           DCHECK_EQ(merged_value, kUnknownHeapValue);  in MergePredecessorValues()
455       if (merged_value == nullptr) {  in MergePredecessorValues()
462              (block->EndsWithReturn() && (merged_value != kUnknownHeapValue ||  in MergePredecessorValues()
468         } else if (!IsStore(merged_value)) {  in MergePredecessorValues()
493         DCHECK_EQ(heap_values_for_[predecessors[0]->GetBlockId()][i], merged_value);  in MergePredecessorValues()
494         heap_values[i] = merged_value;  in MergePredecessorValues()
496         DCHECK(merged_value == kUnknownHeapValue ||  in MergePredecessorValues()
497                merged_value == kDefaultHeapValue ||  in MergePredecessorValues()
498                merged_value->GetBlock()->Dominates(block));  in MergePredecessorValues()
499         if (merged_value != kUnknownHeapValue) {  in MergePredecessorValues()
500           heap_values[i] = merged_value;  in MergePredecessorValues()