Add streaming of poly_int64

Hi,
this patch implements stremaing for poly int.

Bootstrapped/regtested x86_64-linux, OK?

gcc/ChangeLog:

2020-10-02  Jan Hubicka  <hubicka@ucw.cz>

	* data-streamer-in.c (streamer_read_poly_int64): New function.
	* data-streamer-out.c (streamer_write_poly_int64): New function.
	* data-streamer.h (streamer_write_poly_int64): Declare.
	(streamer_read_poly_int64): Declare.

On Fri, 2 Oct 2020, Jan Hubicka wrote:

> Hi,
> this patch implements stremaing for poly int.
> 
> Bootstrapped/regtested x86_64-linux, OK?

OK.

> gcc/ChangeLog:
> 
> 2020-10-02  Jan Hubicka  <hubicka@ucw.cz>
> 
> 	* data-streamer-in.c (streamer_read_poly_int64): New function.
> 	* data-streamer-out.c (streamer_write_poly_int64): New function.
> 	* data-streamer.h (streamer_write_poly_int64): Declare.
> 	(streamer_read_poly_int64): Declare.
> 
> diff --git a/gcc/data-streamer-in.c b/gcc/data-streamer-in.c
> index d3ba634af92..7abb48af9b8 100644
> --- a/gcc/data-streamer-in.c
> +++ b/gcc/data-streamer-in.c
> @@ -186,6 +186,17 @@ streamer_read_poly_uint64 (class lto_input_block *ib)
>    return res;
>  }
>  
> +/* Read a poly_int64 from IB.  */
> +
> +poly_int64
> +streamer_read_poly_int64 (class lto_input_block *ib)
> +{
> +  poly_int64 res;
> +  for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i)
> +    res.coeffs[i] = streamer_read_hwi (ib);
> +  return res;
> +}
> +
>  /* Read gcov_type value from IB.  */
>  
>  gcov_type
> diff --git a/gcc/data-streamer-out.c b/gcc/data-streamer-out.c
> index 66038390468..fb8a90ab2c0 100644
> --- a/gcc/data-streamer-out.c
> +++ b/gcc/data-streamer-out.c
> @@ -229,6 +229,15 @@ streamer_write_poly_uint64 (struct output_block *ob, poly_uint64 work)
>      streamer_write_uhwi_stream (ob->main_stream, work.coeffs[i]);
>  }
>  
> +/* Write a poly_int64 value WORK to OB->main_stream.  */
> +
> +void
> +streamer_write_poly_int64 (struct output_block *ob, poly_int64 work)
> +{
> +  for (int i = 0; i < NUM_POLY_INT_COEFFS; ++i)
> +    streamer_write_hwi_stream (ob->main_stream, work.coeffs[i]);
> +}
> +
>  /* Write a gcov counter value WORK to OB->main_stream.  */
>  
>  void
> diff --git a/gcc/data-streamer.h b/gcc/data-streamer.h
> index 61fa3f9ed63..6ab586f8b11 100644
> --- a/gcc/data-streamer.h
> +++ b/gcc/data-streamer.h
> @@ -54,6 +54,7 @@ void streamer_write_zero (struct output_block *);
>  void streamer_write_uhwi (struct output_block *, unsigned HOST_WIDE_INT);
>  void streamer_write_hwi (struct output_block *, HOST_WIDE_INT);
>  void streamer_write_poly_uint64 (struct output_block *, poly_uint64);
> +void streamer_write_poly_int64 (struct output_block *, poly_int64);
>  void streamer_write_gcov_count (struct output_block *, gcov_type);
>  void streamer_write_string (struct output_block *, struct lto_output_stream *,
>  			    const char *, bool);
> @@ -84,6 +85,7 @@ const char *bp_unpack_string (class data_in *, struct bitpack_d *);
>  unsigned HOST_WIDE_INT streamer_read_uhwi (class lto_input_block *);
>  HOST_WIDE_INT streamer_read_hwi (class lto_input_block *);
>  poly_uint64 streamer_read_poly_uint64 (class lto_input_block *);
> +poly_int64 streamer_read_poly_int64 (class lto_input_block *);
>  gcov_type streamer_read_gcov_count (class lto_input_block *);
>  wide_int streamer_read_wide_int (class lto_input_block *);
>  widest_int streamer_read_widest_int (class lto_input_block *);
>