{"ast_node_type":"variable","tokens":[{"end":86,"kind":"keyword","start":0,"text":"let"}]}
    let use_regs = bx.icmp(IntPredicate::IntULT, reg_count_v, bx.const_u64(max_regs));
    let reg_count_v = bx.load(bx.type_i64(), reg_count, Align::from_bytes(8).unwrap());
    bx.cond_br(use_regs, in_reg, in_mem);