AddGapMove        813 src/lithium-allocator.cc       chunk_->AddGapMove(gap_index, first_output, output_copy);
AddGapMove       1033 src/lithium-allocator.cc       chunk_->AddGapMove(cur_block->last_instruction_index() - 1,
AddGapMove        646 src/lithium.h    void AddGapMove(int index, LOperand* from, LOperand* to);