232     BasicBlock* if_block = loop_->GetPreHeaderBlock();  in PerformUnswitch()  local
236         CreateBasicBlock(++FindBasicBlockPosition(if_block));  in PerformUnswitch()
242     if_block->tail()->SetInOperand(0, {loop_pre_header->id()});  in PerformUnswitch()
245     if (Loop* ploop = loop_desc_[if_block]) {  in PerformUnswitch()
253     cfg.AddEdge(if_block->id(), loop_pre_header->id());  in PerformUnswitch()
257         [loop_pre_header, if_block](Instruction* phi) {  in PerformUnswitch()
258           phi->ForEachInId([loop_pre_header, if_block](uint32_t* id) {  in PerformUnswitch()
259             if (*id == if_block->id()) {  in PerformUnswitch()
269     DominatorTreeNode* if_block_dtn = dom_tree->GetTreeNode(if_block);  in PerformUnswitch()
390                                 ++FindBasicBlockPosition(if_block));  in PerformUnswitch()
402     context_->KillInst(&*if_block->tail());  in PerformUnswitch()
403     InstructionBuilder builder(context_, if_block);  in PerformUnswitch()