{"ast_node_type":"variable","tokens":[{"end":70,"kind":"keyword","start":0,"text":"let"}]}
        let reg_offset = bx.mul(num_regs, bx.cx().const_u8(reg_size));
        let reg_size = if is_int || is_soft_float_abi { 4 } else { 8 };
        let reg_addr = bx.inbounds_ptradd(reg_addr, reg_offset);