LCOV - code coverage report
Current view: top level - gcc - data-streamer.h (source / functions) Coverage Total Hit
Test: gcc.info Lines: 93.1 % 101 94
Test Date: 2024-12-21 13:15:12 Functions: 100.0 % 8 8
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: - 0 0

             Branch data     Line data    Source code
       1                 :             : /* Generic streaming support for various data types.
       2                 :             : 
       3                 :             :    Copyright (C) 2011-2024 Free Software Foundation, Inc.
       4                 :             :    Contributed by Diego Novillo <dnovillo@google.com>
       5                 :             : 
       6                 :             : This file is part of GCC.
       7                 :             : 
       8                 :             : GCC is free software; you can redistribute it and/or modify it under
       9                 :             : the terms of the GNU General Public License as published by the Free
      10                 :             : Software Foundation; either version 3, or (at your option) any later
      11                 :             : version.
      12                 :             : 
      13                 :             : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      14                 :             : WARRANTY; without even the implied warranty of MERCHANTABILITY or
      15                 :             : FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      16                 :             : for more details.
      17                 :             : 
      18                 :             : You should have received a copy of the GNU General Public License
      19                 :             : along with GCC; see the file COPYING3.  If not see
      20                 :             : <http://www.gnu.org/licenses/>.  */
      21                 :             : 
      22                 :             : #ifndef GCC_DATA_STREAMER_H
      23                 :             : #define GCC_DATA_STREAMER_H
      24                 :             : 
      25                 :             : #include "lto-streamer.h"
      26                 :             : 
      27                 :             : /* Data structures used to pack values and bitflags into a vector of
      28                 :             :    words.  Used to stream values of a fixed number of bits in a space
      29                 :             :    efficient way.  */
      30                 :             : static unsigned const BITS_PER_BITPACK_WORD = HOST_BITS_PER_WIDE_INT;
      31                 :             : 
      32                 :             : typedef unsigned HOST_WIDE_INT bitpack_word_t;
      33                 :             : 
      34                 :             : struct bitpack_d
      35                 :             : {
      36                 :             :   /* The position of the first unused or unconsumed bit in the word.  */
      37                 :             :   unsigned pos;
      38                 :             : 
      39                 :             :   /* The current word we are (un)packing.  */
      40                 :             :   bitpack_word_t word;
      41                 :             : 
      42                 :             :   /* The lto_output_stream or the lto_input_block we are streaming to/from.  */
      43                 :             :   void *stream;
      44                 :             : };
      45                 :             : 
      46                 :             : /* In data-streamer.cc  */
      47                 :             : void bp_pack_var_len_unsigned (struct bitpack_d *, unsigned HOST_WIDE_INT);
      48                 :             : void bp_pack_var_len_int (struct bitpack_d *, HOST_WIDE_INT);
      49                 :             : void bp_pack_real_value (struct bitpack_d *, const REAL_VALUE_TYPE *);
      50                 :             : void bp_unpack_real_value (struct bitpack_d *, REAL_VALUE_TYPE *);
      51                 :             : unsigned HOST_WIDE_INT bp_unpack_var_len_unsigned (struct bitpack_d *);
      52                 :             : HOST_WIDE_INT bp_unpack_var_len_int (struct bitpack_d *);
      53                 :             : extern unsigned host_num_poly_int_coeffs;
      54                 :             : 
      55                 :             : /* In data-streamer-out.cc  */
      56                 :             : void streamer_write_zero (struct output_block *);
      57                 :             : void streamer_write_uhwi (struct output_block *, unsigned HOST_WIDE_INT);
      58                 :             : void streamer_write_hwi (struct output_block *, HOST_WIDE_INT);
      59                 :             : void streamer_write_poly_uint64 (struct output_block *, poly_uint64);
      60                 :             : void streamer_write_poly_int64 (struct output_block *, poly_int64);
      61                 :             : void streamer_write_gcov_count (struct output_block *, gcov_type);
      62                 :             : void streamer_write_string (struct output_block *, struct lto_output_stream *,
      63                 :             :                             const char *, bool);
      64                 :             : void streamer_write_string_with_length (struct output_block *,
      65                 :             :                                         struct lto_output_stream *,
      66                 :             :                                         const char *, unsigned int, bool);
      67                 :             : void bp_pack_string_with_length (struct output_block *, struct bitpack_d *,
      68                 :             :                                  const char *, unsigned int, bool);
      69                 :             : void bp_pack_string (struct output_block *, struct bitpack_d *,
      70                 :             :                      const char *, bool);
      71                 :             : void streamer_write_uhwi_stream (struct lto_output_stream *,
      72                 :             :                                  unsigned HOST_WIDE_INT);
      73                 :             : void streamer_write_hwi_stream (struct lto_output_stream *, HOST_WIDE_INT);
      74                 :             : void streamer_write_gcov_count_stream (struct lto_output_stream *, gcov_type);
      75                 :             : void streamer_write_data_stream (struct lto_output_stream *, const void *,
      76                 :             :                                  size_t);
      77                 :             : void streamer_write_wide_int (struct output_block *, const wide_int &);
      78                 :             : void streamer_write_widest_int (struct output_block *, const widest_int &);
      79                 :             : void streamer_write_vrange (struct output_block *, const class vrange &);
      80                 :             : 
      81                 :             : /* In data-streamer-in.cc  */
      82                 :             : const char *streamer_read_string (class data_in *, class lto_input_block *);
      83                 :             : const char *streamer_read_indexed_string (class data_in *,
      84                 :             :                                           class lto_input_block *,
      85                 :             :                                           unsigned int *);
      86                 :             : const char *bp_unpack_indexed_string (class data_in *, struct bitpack_d *,
      87                 :             :                                       unsigned int *);
      88                 :             : const char *bp_unpack_string (class data_in *, struct bitpack_d *);
      89                 :             : unsigned HOST_WIDE_INT streamer_read_uhwi (class lto_input_block *);
      90                 :             : HOST_WIDE_INT streamer_read_hwi (class lto_input_block *);
      91                 :             : poly_uint64 streamer_read_poly_uint64 (class lto_input_block *);
      92                 :             : poly_int64 streamer_read_poly_int64 (class lto_input_block *);
      93                 :             : gcov_type streamer_read_gcov_count (class lto_input_block *);
      94                 :             : wide_int streamer_read_wide_int (class lto_input_block *);
      95                 :             : widest_int streamer_read_widest_int (class lto_input_block *);
      96                 :             : void streamer_read_value_range (class lto_input_block *, class data_in *,
      97                 :             :                                 class value_range &);
      98                 :             : 
      99                 :             : /* Returns a new bit-packing context for bit-packing into S.  */
     100                 :             : inline struct bitpack_d
     101                 :    15550319 : bitpack_create (struct lto_output_stream *s)
     102                 :             : {
     103                 :    15550319 :   struct bitpack_d bp;
     104                 :    15550319 :   bp.pos = 0;
     105                 :    15550319 :   bp.word = 0;
     106                 :    15550319 :   bp.stream = (void *)s;
     107                 :    15550319 :   return bp;
     108                 :             : }
     109                 :             : 
     110                 :             : /* Pack the NBITS bit sized value VAL into the bit-packing context BP.  */
     111                 :             : inline void
     112                 :   264734714 : bp_pack_value (struct bitpack_d *bp, bitpack_word_t val, unsigned nbits)
     113                 :             : {
     114                 :   264734714 :   bitpack_word_t word = bp->word;
     115                 :   264734714 :   int pos = bp->pos;
     116                 :             : 
     117                 :             :   /* Verify that VAL fits in the NBITS.  */
     118                 :   264734714 :   gcc_checking_assert (nbits == BITS_PER_BITPACK_WORD
     119                 :             :                        || !(val & ~(((bitpack_word_t)1<<nbits)-1)));
     120                 :             : 
     121                 :             :   /* If val does not fit into the current bitpack word switch to the
     122                 :             :      next one.  */
     123                 :   264734714 :   if (pos + nbits > BITS_PER_BITPACK_WORD)
     124                 :             :     {
     125                 :     4824312 :       streamer_write_uhwi_stream ((struct lto_output_stream *) bp->stream,
     126                 :             :                                   word);
     127                 :     4824312 :       word = val;
     128                 :     4824312 :       pos = nbits;
     129                 :             :     }
     130                 :             :   else
     131                 :             :     {
     132                 :   259910402 :       word |= val << pos;
     133                 :   259910402 :       pos += nbits;
     134                 :             :     }
     135                 :   264734714 :   bp->word = word;
     136                 :   264734714 :   bp->pos = pos;
     137                 :   264734714 : }
     138                 :             : 
     139                 :             : /* Pack VAL into the bit-packing context BP, using NBITS for each
     140                 :             :    coefficient.  */
     141                 :             : inline void
     142                 :             : bp_pack_poly_value (struct bitpack_d *bp,
     143                 :             :                     const poly_int<NUM_POLY_INT_COEFFS, bitpack_word_t> &val,
     144                 :             :                     unsigned nbits)
     145                 :             : {
     146                 :           0 :   for (int i = 0; i < NUM_POLY_INT_COEFFS; ++i)
     147                 :           0 :     bp_pack_value (bp, val.coeffs[i], nbits);
     148                 :             : }
     149                 :             : 
     150                 :             : /* Finishes bit-packing of BP.  */
     151                 :             : inline void
     152                 :    15576062 : streamer_write_bitpack (struct bitpack_d *bp)
     153                 :             : {
     154                 :    14948110 :   streamer_write_uhwi_stream ((struct lto_output_stream *) bp->stream,
     155                 :             :                               bp->word);
     156                 :    15576062 :   bp->word = 0;
     157                 :     7682409 :   bp->pos = 0;
     158                 :      707258 : }
     159                 :             : 
     160                 :             : /* Returns a new bit-packing context for bit-unpacking from IB.  */
     161                 :             : inline struct bitpack_d
     162                 :    11157725 : streamer_read_bitpack (class lto_input_block *ib)
     163                 :             : {
     164                 :    11157725 :   struct bitpack_d bp;
     165                 :    11157725 :   bp.word = streamer_read_uhwi (ib);
     166                 :    11157725 :   bp.pos = 0;
     167                 :    11157725 :   bp.stream = (void *)ib;
     168                 :    11157725 :   return bp;
     169                 :             : }
     170                 :             : 
     171                 :             : /* Unpacks NBITS bits from the bit-packing context BP and returns them.  */
     172                 :             : inline bitpack_word_t
     173                 :   166724661 : bp_unpack_value (struct bitpack_d *bp, unsigned nbits)
     174                 :             : {
     175                 :   166724661 :   bitpack_word_t mask, val;
     176                 :   166724661 :   int pos = bp->pos;
     177                 :             : 
     178                 :   333449322 :   mask = (nbits == BITS_PER_BITPACK_WORD
     179                 :   166724661 :           ? (bitpack_word_t) -1
     180                 :   165028746 :           : ((bitpack_word_t) 1 << nbits) - 1);
     181                 :             : 
     182                 :             :   /* If there are not continuous nbits in the current bitpack word
     183                 :             :      switch to the next one.  */
     184                 :   166724661 :   if (pos + nbits > BITS_PER_BITPACK_WORD)
     185                 :             :     {
     186                 :     6542750 :       bp->word = val
     187                 :     3271375 :         = streamer_read_uhwi ((class lto_input_block *)bp->stream);
     188                 :     3271375 :       bp->pos = nbits;
     189                 :     3271375 :       return val & mask;
     190                 :             :     }
     191                 :   163453286 :   val = bp->word;
     192                 :   163453286 :   val >>= pos;
     193                 :   163453286 :   bp->pos = pos + nbits;
     194                 :             : 
     195                 :   163453286 :   return val & mask;
     196                 :             : }
     197                 :             : 
     198                 :             : /* Common code for reading poly_int.  */
     199                 :             : 
     200                 :             : template<typename C, typename F, typename ...Args>
     201                 :             : poly_int<NUM_POLY_INT_COEFFS, C>
     202                 :       52380 : poly_int_read_common (F read_coeff, Args ...args)
     203                 :             : {
     204                 :             :   poly_int<NUM_POLY_INT_COEFFS, C> x;
     205                 :             :   unsigned i;
     206                 :             : 
     207                 :             : #ifdef ACCEL_COMPILER
     208                 :             :   /* Ensure that we have streamed-in host_num_poly_int_coeffs.  */
     209                 :             :   const unsigned num_poly_int_coeffs = host_num_poly_int_coeffs;
     210                 :             :   gcc_assert (host_num_poly_int_coeffs > 0);
     211                 :             : #else
     212                 :       52380 :   const unsigned num_poly_int_coeffs = NUM_POLY_INT_COEFFS;
     213                 :             : #endif
     214                 :             : 
     215                 :             :   if (num_poly_int_coeffs <= NUM_POLY_INT_COEFFS)
     216                 :             :     {
     217                 :      104760 :       for (i = 0; i < num_poly_int_coeffs; i++)
     218                 :       52380 :         x.coeffs[i] = read_coeff (args...);
     219                 :       52380 :       for (; i < NUM_POLY_INT_COEFFS; i++)
     220                 :             :         x.coeffs[i] = 0;
     221                 :             :     }
     222                 :             :   else
     223                 :             :     {
     224                 :             :       for (i = 0; i < NUM_POLY_INT_COEFFS; i++)
     225                 :             :         x.coeffs[i] = read_coeff (args...);
     226                 :             : 
     227                 :             :       /* Ensure that degree of poly_int <= accel NUM_POLY_INT_COEFFS.  */
     228                 :             :       for (; i < num_poly_int_coeffs; i++)
     229                 :             :         {
     230                 :             :           C val = read_coeff (args...);
     231                 :             :           if (val != 0)
     232                 :             :             fatal_error (input_location,
     233                 :             :                          "degree of %<poly_int%> exceeds "
     234                 :             :                          "%<NUM_POLY_INT_COEFFS%> (%d)",
     235                 :             :                          NUM_POLY_INT_COEFFS);
     236                 :             :         }
     237                 :             :     }
     238                 :             :   return x;
     239                 :             : }
     240                 :             : 
     241                 :             : /* Unpacks a polynomial value from the bit-packing context BP in which each
     242                 :             :    coefficient has NBITS bits.  */
     243                 :             : inline poly_int<NUM_POLY_INT_COEFFS, bitpack_word_t>
     244                 :           0 : bp_unpack_poly_value (struct bitpack_d *bp, unsigned nbits)
     245                 :             : {
     246                 :           0 :   return poly_int_read_common<bitpack_word_t> (bp_unpack_value, bp, nbits);
     247                 :             : }
     248                 :             : 
     249                 :             : 
     250                 :             : /* Write a character to the output block.  */
     251                 :             : 
     252                 :             : inline void
     253                 :    14924225 : streamer_write_char_stream (struct lto_output_stream *obs, char c)
     254                 :             : {
     255                 :             :   /* No space left.  */
     256                 :    14924225 :   if (obs->left_in_block == 0)
     257                 :      153191 :     lto_append_block (obs);
     258                 :             : 
     259                 :             :   /* Write the actual character.  */
     260                 :    14924225 :   char *current_pointer = obs->current_pointer;
     261                 :    14924225 :   *(current_pointer++) = c;
     262                 :    14924225 :   obs->current_pointer = current_pointer;
     263                 :    14924225 :   obs->total_size++;
     264                 :    14924225 :   obs->left_in_block--;
     265                 :    14924225 : }
     266                 :             : 
     267                 :             : 
     268                 :             : /* Read byte from the input block.  */
     269                 :             : 
     270                 :             : inline unsigned char
     271                 :    48629284 : streamer_read_uchar (class lto_input_block *ib)
     272                 :             : {
     273                 :    48629284 :   if (ib->p >= ib->len)
     274                 :           0 :     lto_section_overrun (ib);
     275                 :    48629284 :   return (ib->data[ib->p++]);
     276                 :             : }
     277                 :             : 
     278                 :             : /* Output VAL into OBS and verify it is in range MIN...MAX that is supposed
     279                 :             :    to be compile time constant.
     280                 :             :    Be host independent, limit range to 31bits.  */
     281                 :             : 
     282                 :             : inline void
     283                 :    29511769 : streamer_write_hwi_in_range (struct lto_output_stream *obs,
     284                 :             :                                   HOST_WIDE_INT min,
     285                 :             :                                   HOST_WIDE_INT max,
     286                 :             :                                   HOST_WIDE_INT val)
     287                 :             : {
     288                 :    29511769 :   HOST_WIDE_INT range = max - min;
     289                 :             : 
     290                 :    28609830 :   gcc_checking_assert (val >= min && val <= max && range > 0
     291                 :             :                        && range < 0x7fffffff);
     292                 :             : 
     293                 :    29511769 :   val -= min;
     294                 :    29511769 :   streamer_write_uhwi_stream (obs, (unsigned HOST_WIDE_INT) val);
     295                 :    28529213 : }
     296                 :             : 
     297                 :             : /* Input VAL into OBS and verify it is in range MIN...MAX that is supposed
     298                 :             :    to be compile time constant.  PURPOSE is used for error reporting.  */
     299                 :             : 
     300                 :             : inline HOST_WIDE_INT
     301                 :    20948642 : streamer_read_hwi_in_range (class lto_input_block *ib,
     302                 :             :                                  const char *purpose,
     303                 :             :                                  HOST_WIDE_INT min,
     304                 :             :                                  HOST_WIDE_INT max)
     305                 :             : {
     306                 :    20948642 :   HOST_WIDE_INT range = max - min;
     307                 :    20948642 :   unsigned HOST_WIDE_INT uval = streamer_read_uhwi (ib);
     308                 :             : 
     309                 :    20948642 :   gcc_checking_assert (range > 0 && range < 0x7fffffff);
     310                 :             : 
     311                 :    20948642 :   HOST_WIDE_INT val = (HOST_WIDE_INT) (uval + (unsigned HOST_WIDE_INT) min);
     312                 :    20948642 :   if (val < min || val > max)
     313                 :           0 :     lto_value_range_error (purpose, val, min, max);
     314                 :    20948642 :   return val;
     315                 :             : }
     316                 :             : 
     317                 :             : /* Output VAL into BP and verify it is in range MIN...MAX that is supposed
     318                 :             :    to be compile time constant.
     319                 :             :    Be host independent, limit range to 31bits.  */
     320                 :             : 
     321                 :             : inline void
     322                 :    10468638 : bp_pack_int_in_range (struct bitpack_d *bp,
     323                 :             :                       HOST_WIDE_INT min,
     324                 :             :                       HOST_WIDE_INT max,
     325                 :             :                       HOST_WIDE_INT val)
     326                 :             : {
     327                 :    10468638 :   HOST_WIDE_INT range = max - min;
     328                 :    10468638 :   int nbits = floor_log2 (range) + 1;
     329                 :             : 
     330                 :    10468638 :   gcc_checking_assert (val >= min && val <= max && range > 0
     331                 :             :                        && range < 0x7fffffff);
     332                 :             : 
     333                 :    10468638 :   val -= min;
     334                 :    10468638 :   bp_pack_value (bp, val, nbits);
     335                 :    10468638 : }
     336                 :             : 
     337                 :             : /* Input VAL into BP and verify it is in range MIN...MAX that is supposed
     338                 :             :    to be compile time constant.  PURPOSE is used for error reporting.  */
     339                 :             : 
     340                 :             : inline HOST_WIDE_INT
     341                 :     7029204 : bp_unpack_int_in_range (struct bitpack_d *bp,
     342                 :             :                         const char *purpose,
     343                 :             :                         HOST_WIDE_INT min,
     344                 :             :                         HOST_WIDE_INT max)
     345                 :             : {
     346                 :     7029204 :   HOST_WIDE_INT range = max - min;
     347                 :     7029204 :   int nbits = floor_log2 (range) + 1;
     348                 :     7029204 :   HOST_WIDE_INT val = bp_unpack_value (bp, nbits);
     349                 :             : 
     350                 :     7029204 :   gcc_checking_assert (range > 0 && range < 0x7fffffff);
     351                 :             : 
     352                 :     7029204 :   if (val < min || val > max)
     353                 :           0 :     lto_value_range_error (purpose, val, min, max);
     354                 :     7029204 :   return val;
     355                 :             : }
     356                 :             : 
     357                 :             : /* Output VAL of type "enum enum_name" into OBS.
     358                 :             :    Assume range 0...ENUM_LAST - 1.  */
     359                 :             : #define streamer_write_enum(obs,enum_name,enum_last,val) \
     360                 :             :   streamer_write_hwi_in_range ((obs), 0, (int)(enum_last) - 1, (int)(val))
     361                 :             : 
     362                 :             : /* Input enum of type "enum enum_name" from IB.
     363                 :             :    Assume range 0...ENUM_LAST - 1.  */
     364                 :             : #define streamer_read_enum(ib,enum_name,enum_last) \
     365                 :             :   (enum enum_name)streamer_read_hwi_in_range ((ib), #enum_name, 0, \
     366                 :             :                                               (int)(enum_last) - 1)
     367                 :             : 
     368                 :             : /* Output VAL of type "enum enum_name" into BP.
     369                 :             :    Assume range 0...ENUM_LAST - 1.  */
     370                 :             : #define bp_pack_enum(bp,enum_name,enum_last,val) \
     371                 :             :   bp_pack_int_in_range ((bp), 0, (int)(enum_last) - 1, (int)(val))
     372                 :             : 
     373                 :             : /* Input enum of type "enum enum_name" from BP.
     374                 :             :    Assume range 0...ENUM_LAST - 1.  */
     375                 :             : #define bp_unpack_enum(bp,enum_name,enum_last) \
     376                 :             :   (enum enum_name)bp_unpack_int_in_range ((bp), #enum_name, 0, \
     377                 :             :                                         (int)(enum_last) - 1)
     378                 :             : 
     379                 :             : /* Output the start of a record with TAG to output block OB.  */
     380                 :             : 
     381                 :             : inline void
     382                 :    27287083 : streamer_write_record_start (struct output_block *ob, enum LTO_tags tag)
     383                 :             : {
     384                 :    27287083 :   streamer_write_enum (ob->main_stream, LTO_tags, LTO_NUM_TAGS, tag);
     385                 :     2386257 : }
     386                 :             : 
     387                 :             : /* Return the next tag in the input block IB.  */
     388                 :             : 
     389                 :             : inline enum LTO_tags
     390                 :    19443675 : streamer_read_record_start (class lto_input_block *ib)
     391                 :             : {
     392                 :    19443675 :   return streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
     393                 :             : }
     394                 :             : 
     395                 :             : #endif  /* GCC_DATA_STREAMER_H  */
        

Generated by: LCOV version 2.1-beta

LCOV profile is generated on x86_64 machine using following configure options: configure --disable-bootstrap --enable-coverage=opt --enable-languages=c,c++,fortran,go,jit,lto,rust,m2 --enable-host-shared. GCC test suite is run with the built compiler.