{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
    let reg_ptr_v = bx.load(bx.type_ptr(), reg_save_area, ptr_align_abi);
    // Work out the address of the value in the register save area.
    let scaled_reg_count = bx.mul(reg_count_v, bx.const_u64(8));