406       HInstruction* merged_value = nullptr;  in MergePredecessorValues()  local
437         if (merged_value == nullptr) {  in MergePredecessorValues()
440           merged_value = pred_value;  in MergePredecessorValues()
441         } else if (pred_value != merged_value) {  in MergePredecessorValues()
443           merged_value = kUnknownHeapValue;  in MergePredecessorValues()
457           DCHECK_EQ(merged_value, kUnknownHeapValue);  in MergePredecessorValues()
463       if (merged_value == nullptr) {  in MergePredecessorValues()
470              (block->EndsWithReturn() && (merged_value != kUnknownHeapValue ||  in MergePredecessorValues()
476         } else if (!IsStore(merged_value)) {  in MergePredecessorValues()
501         DCHECK_EQ(heap_values_for_[predecessors[0]->GetBlockId()][i], merged_value);  in MergePredecessorValues()
502         heap_values[i] = merged_value;  in MergePredecessorValues()
504         DCHECK(merged_value == kUnknownHeapValue ||  in MergePredecessorValues()
505                merged_value == kDefaultHeapValue ||  in MergePredecessorValues()
506                merged_value->GetBlock()->Dominates(block));  in MergePredecessorValues()
507         if (merged_value != kUnknownHeapValue) {  in MergePredecessorValues()
508           heap_values[i] = merged_value;  in MergePredecessorValues()