LCOV - code coverage report
Current view: top level - gcc/rtl-ssa - access-utils.h (source / functions) Coverage Total Hit
Test: gcc.info Lines: 97.2 % 142 138
Test Date: 2024-04-20 14:03:02 Functions: 96.3 % 27 26
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             Branch data     Line data    Source code
       1                 :             : // Access-related utilities for RTL SSA                             -*- C++ -*-
       2                 :             : // Copyright (C) 2020-2024 Free Software Foundation, Inc.
       3                 :             : //
       4                 :             : // This file is part of GCC.
       5                 :             : //
       6                 :             : // GCC is free software; you can redistribute it and/or modify it under
       7                 :             : // the terms of the GNU General Public License as published by the Free
       8                 :             : // Software Foundation; either version 3, or (at your option) any later
       9                 :             : // version.
      10                 :             : //
      11                 :             : // GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      12                 :             : // WARRANTY; without even the implied warranty of MERCHANTABILITY or
      13                 :             : // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      14                 :             : // for more details.
      15                 :             : //
      16                 :             : // You should have received a copy of the GNU General Public License
      17                 :             : // along with GCC; see the file COPYING3.  If not see
      18                 :             : // <http://www.gnu.org/licenses/>.
      19                 :             : 
      20                 :             : namespace rtl_ssa {
      21                 :             : 
      22                 :             : // Return a referene to the whole of register REGNO.
      23                 :             : inline resource_info
      24                 :    12555205 : full_register (unsigned int regno)
      25                 :             : {
      26                 :    12555205 :   return { GET_MODE (regno_reg_rtx[regno]), regno };
      27                 :             : }
      28                 :             : 
      29                 :             : // Return true if sorted array ACCESSES includes an access to hard registers.
      30                 :             : inline bool
      31                 :           0 : accesses_include_hard_registers (const access_array &accesses)
      32                 :             : {
      33                 :           0 :   return accesses.size () && HARD_REGISTER_NUM_P (accesses.front ()->regno ());
      34                 :             : }
      35                 :             : 
      36                 :             : // Return true if ACCESSES includes a reference to a non-fixed hard register.
      37                 :             : inline bool
      38                 :             : accesses_include_nonfixed_hard_registers (access_array accesses)
      39                 :             : {
      40                 :             :   for (access_info *access : accesses)
      41                 :             :     {
      42                 :             :       if (!HARD_REGISTER_NUM_P (access->regno ()))
      43                 :             :         break;
      44                 :             :       if (!fixed_regs[access->regno ()])
      45                 :             :         return true;
      46                 :             :     }
      47                 :             :   return false;
      48                 :             : }
      49                 :             : 
      50                 :             : // Return true if sorted array ACCESSES includes an access to memory.
      51                 :             : inline bool
      52                 :             : accesses_include_memory (const access_array &accesses)
      53                 :             : {
      54                 :             :   return accesses.size () && accesses.back ()->is_mem ();
      55                 :             : }
      56                 :             : 
      57                 :             : // If sorted array ACCESSES includes an access to memory, return the access,
      58                 :             : // otherwise return null.
      59                 :             : template<typename T>
      60                 :             : inline auto
      61                 :    55966416 : memory_access (T accesses) -> decltype (accesses[0])
      62                 :             : {
      63                 :   109678119 :   if (accesses.size () && accesses.back ()->is_mem ())
      64                 :             :     return accesses.back ();
      65                 :             :   return nullptr;
      66                 :             : }
      67                 :             : 
      68                 :             : // If ACCESSES has a memory access, drop it.  Otherwise, return ACCESSES
      69                 :             : // unchanged.
      70                 :             : template<typename T>
      71                 :             : inline T
      72                 :             : drop_memory_access (T accesses)
      73                 :             : {
      74                 :             :   if (!memory_access (accesses))
      75                 :             :     return accesses;
      76                 :             : 
      77                 :             :   access_array arr (accesses);
      78                 :             :   return T (arr.begin (), accesses.size () - 1);
      79                 :             : }
      80                 :             : 
      81                 :             : // Filter ACCESSES to return an access_array of only those accesses that
      82                 :             : // satisfy PREDICATE.  Alocate the new array above WATERMARK.
      83                 :             : template<typename T, typename FilterPredicate>
      84                 :             : inline T
      85                 :      742075 : filter_accesses (obstack_watermark &watermark,
      86                 :             :                  T accesses,
      87                 :             :                  FilterPredicate predicate)
      88                 :             : {
      89                 :      742075 :   access_array_builder builder (watermark);
      90                 :      742075 :   builder.reserve (accesses.size ());
      91                 :     2790249 :   for (auto access : accesses)
      92                 :     2048174 :     if (predicate (access))
      93                 :      896773 :       builder.quick_push (access);
      94                 :      742075 :   return T (builder.finish ());
      95                 :      742075 : }
      96                 :             : 
      97                 :             : // Given an array of ACCESSES, remove any access with regno REGNO.
      98                 :             : // Allocate the new access array above WM.
      99                 :             : template<typename T>
     100                 :             : inline T
     101                 :             : remove_regno_access (obstack_watermark &watermark,
     102                 :             :                      T accesses, unsigned int regno)
     103                 :             : {
     104                 :             :   using Access = decltype (accesses[0]);
     105                 :             :   auto pred = [regno](Access a) { return a->regno () != regno; };
     106                 :             :   return filter_accesses (watermark, accesses, pred);
     107                 :             : }
     108                 :             : 
     109                 :             : // As above, but additionally check that we actually did remove an access.
     110                 :             : template<typename T>
     111                 :             : inline T
     112                 :             : check_remove_regno_access (obstack_watermark &watermark,
     113                 :             :                            T accesses, unsigned regno)
     114                 :             : {
     115                 :             :   auto orig_size = accesses.size ();
     116                 :             :   auto result = remove_regno_access (watermark, accesses, regno);
     117                 :             :   gcc_assert (result.size () < orig_size);
     118                 :             :   return result;
     119                 :             : }
     120                 :             : 
     121                 :             : // If sorted array ACCESSES includes a reference to REGNO, return the
     122                 :             : // access, otherwise return null.
     123                 :             : template<typename T>
     124                 :             : inline auto
     125                 :     8670854 : find_access (T accesses, unsigned int regno) -> decltype (accesses[0])
     126                 :             : {
     127                 :     8670854 :   unsigned int start = 0;
     128                 :     8670854 :   unsigned int end = accesses.size ();
     129                 :    21783282 :   while (start < end)
     130                 :             :     {
     131                 :    11461787 :       unsigned int mid = (start + end) / 2;
     132                 :    22923574 :       unsigned int found = accesses[mid]->regno ();
     133                 :    11461787 :       if (found == regno)
     134                 :             :         return accesses[mid];
     135                 :     4441574 :       if (found < regno)
     136                 :     2366549 :         start = mid + 1;
     137                 :             :       else
     138                 :             :         end = mid;
     139                 :             :     }
     140                 :             :   return nullptr;
     141                 :             : }
     142                 :             : 
     143                 :             : // If sorted array ACCESSES includes a reference to REGNO, return the
     144                 :             : // index of the access, otherwise return -1.
     145                 :             : inline int
     146                 :     2036287 : find_access_index (access_array accesses, unsigned int regno)
     147                 :             : {
     148                 :     2036287 :   unsigned int start = 0;
     149                 :     2036287 :   unsigned int end = accesses.size ();
     150                 :     4102315 :   while (start < end)
     151                 :             :     {
     152                 :     2066028 :       unsigned int mid = (start + end) / 2;
     153                 :     2066028 :       unsigned int found = accesses[mid]->regno ();
     154                 :     2066028 :       if (found == regno)
     155                 :     2036287 :         return mid;
     156                 :       29741 :       if (found < regno)
     157                 :         374 :         start = mid + 1;
     158                 :             :       else
     159                 :             :         end = mid;
     160                 :             :     }
     161                 :             :   return -1;
     162                 :             : }
     163                 :             : 
     164                 :             : // If ACCESS is a set whose result is used by at least one instruction,
     165                 :             : // return the access as a set_info, otherwise return null.
     166                 :             : inline const set_info *
     167                 :    64041587 : set_with_nondebug_insn_uses (const access_info *access)
     168                 :             : {
     169                 :    64041587 :   if (access->is_set_with_nondebug_insn_uses ())
     170                 :             :     // No need for as_a; this test is just as definitive.
     171                 :    40565730 :     return static_cast<const set_info *> (access);
     172                 :             :   return nullptr;
     173                 :             : }
     174                 :             : 
     175                 :             : // A non-const version of the above.
     176                 :             : inline set_info *
     177                 :             : set_with_nondebug_insn_uses (access_info *access)
     178                 :             : {
     179                 :             :   if (access->is_set_with_nondebug_insn_uses ())
     180                 :             :     return static_cast<set_info *> (access);
     181                 :             :   return nullptr;
     182                 :             : }
     183                 :             : 
     184                 :             : // ACCESS is known to be associated with an instruction rather than
     185                 :             : // a phi node.  Return which instruction that is.
     186                 :             : inline insn_info *
     187                 :    53358661 : access_insn (const access_info *access)
     188                 :             : {
     189                 :             :   // In release builds this function reduces to a single pointer reference.
     190                 :    53358661 :   if (auto *def = dyn_cast<const def_info *> (access))
     191                 :    17252347 :     return def->insn ();
     192                 :    36106314 :   return as_a<const use_info *> (access)->insn ();
     193                 :             : }
     194                 :             : 
     195                 :             : // If ACCESS records a use, return the value that it uses.  If ACCESS records
     196                 :             : // a set, return that set.  If ACCESS records a clobber, return null.
     197                 :             : inline const set_info *
     198                 :             : access_value (const access_info *access)
     199                 :             : {
     200                 :             :   if (!access)
     201                 :             :     return nullptr;
     202                 :             : 
     203                 :             :   if (auto *use = dyn_cast<const use_info *> (access))
     204                 :             :     return use->def ();
     205                 :             : 
     206                 :             :   return dyn_cast<const set_info *> (access);
     207                 :             : }
     208                 :             : 
     209                 :             : // A non-const version of the above.
     210                 :             : inline set_info *
     211                 :             : access_value (access_info *access)
     212                 :             : {
     213                 :             :   auto *const_access = const_cast<const access_info *> (access);
     214                 :             :   return const_cast<set_info *> (access_value (const_access));
     215                 :             : }
     216                 :             : 
     217                 :             : // If ACCESS is a degenerate phi, return the set_info that defines its input,
     218                 :             : // otherwise return ACCESS itself.
     219                 :             : template<typename T>
     220                 :             : inline const T *
     221                 :   154617555 : look_through_degenerate_phi (const T *access)
     222                 :             : {
     223                 :    19086080 :   if (auto *phi = dyn_cast<const phi_info *> (access))
     224                 :    19086080 :     if (phi->is_degenerate ())
     225                 :     8533105 :       return phi->input_value (0);
     226                 :             :   return access;
     227                 :             : }
     228                 :             : 
     229                 :             : // A non-const version of the above.
     230                 :             : template<typename T>
     231                 :             : inline T *
     232                 :   154617555 : look_through_degenerate_phi (T *access)
     233                 :             : {
     234                 :   154617555 :   auto *const_access = const_cast<const T *> (access);
     235                 :   154617555 :   return const_cast<T *> (look_through_degenerate_phi (const_access));
     236                 :             : }
     237                 :             : 
     238                 :             : // If CLOBBER is in a group, return the first clobber in the group,
     239                 :             : // otherwise return CLOBBER itself.
     240                 :             : inline clobber_info *
     241                 :     8138579 : first_clobber_in_group (clobber_info *clobber)
     242                 :             : {
     243                 :     8138579 :   if (clobber->is_in_group ())
     244                 :     8082594 :     return clobber->group ()->first_clobber ();
     245                 :             :   return clobber;
     246                 :             : }
     247                 :             : 
     248                 :             : // If CLOBBER is in a group, return the last clobber in the group,
     249                 :             : // otherwise return CLOBBER itself.
     250                 :             : inline clobber_info *
     251                 :     8781081 : last_clobber_in_group (clobber_info *clobber)
     252                 :             : {
     253                 :     8781081 :   if (clobber->is_in_group ())
     254                 :     8781080 :     return clobber->group ()->last_clobber ();
     255                 :             :   return clobber;
     256                 :             : }
     257                 :             : 
     258                 :             : // If DEF is a clobber in a group, return the containing group,
     259                 :             : // otherwise return DEF.
     260                 :             : inline def_mux
     261                 :     3633565 : clobber_group_or_single_def (def_info *def)
     262                 :             : {
     263                 :     3633565 :   if (auto *clobber = dyn_cast<clobber_info *> (def))
     264                 :     2160296 :     if (clobber->is_in_group ())
     265                 :     1990007 :       return clobber->group ();
     266                 :     1643558 :   return def;
     267                 :             : }
     268                 :             : 
     269                 :             : // Return the first definition associated with NODE.  If NODE holds
     270                 :             : // a single set, the result is that set.  If NODE holds a clobber_group,
     271                 :             : // the result is the first clobber in the group.
     272                 :             : inline def_info *
     273                 :    26234084 : first_def (def_node *node)
     274                 :             : {
     275                 :    46059151 :   return node->first_def ();
     276                 :             : }
     277                 :             : 
     278                 :             : // Likewise for something that is either a node or a single definition.
     279                 :             : inline def_info *
     280                 :     1738285 : first_def (def_mux mux)
     281                 :             : {
     282                 :     2685952 :   return mux.first_def ();
     283                 :             : }
     284                 :             : 
     285                 :             : // Return the last definition associated with NODE.  If NODE holds
     286                 :             : // a single set, the result is that set.  If NODE holds a clobber_group,
     287                 :             : // the result is the last clobber in the group.
     288                 :             : inline def_info *
     289                 :     3877106 : last_def (def_node *node)
     290                 :             : {
     291                 :     3877106 :   if (auto *group = dyn_cast<clobber_group *> (node))
     292                 :     2040018 :     return group->last_clobber ();
     293                 :     1837088 :   return node->first_def ();
     294                 :             : }
     295                 :             : 
     296                 :             : // Likewise for something that is either a node or a single definition.
     297                 :             : inline def_info *
     298                 :     1895280 : last_def (def_mux mux)
     299                 :             : {
     300                 :     1895280 :   return mux.last_def ();
     301                 :             : }
     302                 :             : 
     303                 :             : // If INSN's definitions contain a single set, return that set, otherwise
     304                 :             : // return null.
     305                 :             : inline set_info *
     306                 :             : single_set_info (insn_info *insn)
     307                 :             : {
     308                 :             :   set_info *set = nullptr;
     309                 :             :   for (auto def : insn->defs ())
     310                 :             :     if (auto this_set = dyn_cast<set_info *> (def))
     311                 :             :       {
     312                 :             :         if (set)
     313                 :             :           return nullptr;
     314                 :             :         set = this_set;
     315                 :             :       }
     316                 :             :   return set;
     317                 :             : }
     318                 :             : 
     319                 :             : int lookup_use (splay_tree<use_info *> &, insn_info *);
     320                 :             : int lookup_def (def_splay_tree &, insn_info *);
     321                 :             : int lookup_clobber (clobber_tree &, insn_info *);
     322                 :             : int lookup_call_clobbers (insn_call_clobbers_tree &, insn_info *);
     323                 :             : 
     324                 :             : // Search backwards from immediately before INSN for the first instruction
     325                 :             : // recorded in TREE, ignoring any instruction I for which IGNORE (I) is true.
     326                 :             : // Return null if no such instruction exists.
     327                 :             : template<typename IgnorePredicate>
     328                 :             : insn_info *
     329                 :     7638870 : prev_call_clobbers_ignoring (insn_call_clobbers_tree &tree, insn_info *insn,
     330                 :             :                              IgnorePredicate ignore)
     331                 :             : {
     332                 :     7638870 :   if (!tree)
     333                 :             :     return nullptr;
     334                 :             : 
     335                 :     7638870 :   int comparison = lookup_call_clobbers (tree, insn);
     336                 :     9625540 :   while (comparison <= 0 || ignore (tree->insn ()))
     337                 :             :     {
     338                 :     6157005 :       if (!tree.splay_prev_node ())
     339                 :             :         return nullptr;
     340                 :             : 
     341                 :             :       comparison = 1;
     342                 :             :     }
     343                 :             :   return tree->insn ();
     344                 :             : }
     345                 :             : 
     346                 :             : // Search forwards from immediately after INSN for the first instruction
     347                 :             : // recorded in TREE, ignoring any instruction I for which IGNORE (I) is true.
     348                 :             : // Return null if no such instruction exists.
     349                 :             : template<typename IgnorePredicate>
     350                 :             : insn_info *
     351                 :    20803069 : next_call_clobbers_ignoring (insn_call_clobbers_tree &tree, insn_info *insn,
     352                 :             :                              IgnorePredicate ignore)
     353                 :             : {
     354                 :    20803069 :   if (!tree)
     355                 :             :     return nullptr;
     356                 :             : 
     357                 :    20803069 :   int comparison = lookup_call_clobbers (tree, insn);
     358                 :    30071670 :   while (comparison >= 0 || ignore (tree->insn ()))
     359                 :             :     {
     360                 :    17512244 :       if (!tree.splay_next_node ())
     361                 :             :         return nullptr;
     362                 :             : 
     363                 :             :       comparison = -1;
     364                 :             :     }
     365                 :          36 :   return tree->insn ();
     366                 :             : }
     367                 :             : 
     368                 :             : // Search forwards from immediately after INSN for the first instruction
     369                 :             : // recorded in TREE.  Return null if no such instruction exists.
     370                 :             : inline insn_info *
     371                 :         574 : next_call_clobbers (insn_call_clobbers_tree &tree, insn_info *insn)
     372                 :             : {
     373                 :         574 :   auto ignore = [](const insn_info *) { return false; };
     374                 :         574 :   return next_call_clobbers_ignoring (tree, insn, ignore);
     375                 :             : }
     376                 :             : 
     377                 :             : // If ACCESS is a set, return the first use of ACCESS by a nondebug insn I
     378                 :             : // for which IGNORE (I) is false.  Return null if ACCESS is not a set or if
     379                 :             : // no such use exists.
     380                 :             : template<typename IgnorePredicate>
     381                 :             : inline use_info *
     382                 :    41459701 : first_nondebug_insn_use_ignoring (const access_info *access,
     383                 :             :                                   IgnorePredicate ignore)
     384                 :             : {
     385                 :    21996989 :   if (const set_info *set = set_with_nondebug_insn_uses (access))
     386                 :             :     {
     387                 :             :       // Written this way to emphasize to the compiler that first_use
     388                 :             :       // must be nonnull in this situation.
     389                 :    21996989 :       use_info *use = set->first_use ();
     390                 :             :       do
     391                 :             :         {
     392                 :    21996989 :           if (!ignore (use->insn ()))
     393                 :    21996989 :             return use;
     394                 :           0 :           use = use->next_nondebug_insn_use ();
     395                 :             :         }
     396                 :           0 :       while (use);
     397                 :             :     }
     398                 :             :   return nullptr;
     399                 :             : }
     400                 :             : 
     401                 :             : // If ACCESS is a set, return the last use of ACCESS by a nondebug insn I for
     402                 :             : // which IGNORE (I) is false.  Return null if ACCESS is not a set or if no
     403                 :             : // such use exists.
     404                 :             : template<typename IgnorePredicate>
     405                 :             : inline use_info *
     406                 :    22581886 : last_nondebug_insn_use_ignoring (const access_info *access,
     407                 :             :                                  IgnorePredicate ignore)
     408                 :             : {
     409                 :    18568741 :   if (const set_info *set = set_with_nondebug_insn_uses (access))
     410                 :             :     {
     411                 :             :       // Written this way to emphasize to the compiler that
     412                 :             :       // last_nondebug_insn_use must be nonnull in this situation.
     413                 :    18568741 :       use_info *use = set->last_nondebug_insn_use ();
     414                 :             :       do
     415                 :             :         {
     416                 :    19899948 :           if (!ignore (use->insn ()))
     417                 :    14109325 :             return use;
     418                 :     5790623 :           use = use->prev_use ();
     419                 :             :         }
     420                 :     5790623 :       while (use);
     421                 :             :     }
     422                 :             :   return nullptr;
     423                 :             : }
     424                 :             : 
     425                 :             : // If DEF is null, return null.
     426                 :             : //
     427                 :             : // Otherwise, search backwards for an access to DEF->resource (), starting at
     428                 :             : // the end of DEF's live range.  Ignore clobbers if IGNORE_CLOBBERS_SETTING
     429                 :             : // is YES, otherwise treat them like any other access.  Also ignore any
     430                 :             : // access A for which IGNORE (access_insn (A)) is true.
     431                 :             : //
     432                 :             : // Thus if DEF is a set that is used by nondebug insns, the first access
     433                 :             : // that the function considers is the last such use of the set.  Otherwise,
     434                 :             : // the first access that the function considers is DEF itself.
     435                 :             : //
     436                 :             : // Return the access found, or null if there is no access that meets
     437                 :             : // the criteria.
     438                 :             : //
     439                 :             : // Note that this function does not consider separately-recorded call clobbers,
     440                 :             : // although such clobbers are only relevant if IGNORE_CLOBBERS_SETTING is NO.
     441                 :             : template<typename IgnorePredicate>
     442                 :             : access_info *
     443                 :    42435513 : last_access_ignoring (def_info *def, ignore_clobbers ignore_clobbers_setting,
     444                 :             :                       IgnorePredicate ignore)
     445                 :             : {
     446                 :    42435513 :   while (def)
     447                 :             :     {
     448                 :    30720465 :       auto *clobber = dyn_cast<clobber_info *> (def);
     449                 :    30720465 :       if (clobber && ignore_clobbers_setting == ignore_clobbers::YES)
     450                 :     8138579 :         def = first_clobber_in_group (clobber);
     451                 :             :       else
     452                 :             :         {
     453                 :    22581886 :           if (use_info *use = last_nondebug_insn_use_ignoring (def, ignore))
     454                 :    14109325 :             return use;
     455                 :             : 
     456                 :     8472561 :           insn_info *insn = def->insn ();
     457                 :     8472561 :           if (!ignore (insn))
     458                 :     8472561 :             return def;
     459                 :             :         }
     460                 :    50574092 :       def = def->prev_def ();
     461                 :             :     }
     462                 :             :   return nullptr;
     463                 :             : }
     464                 :             : 
     465                 :             : // Search backwards for an access to DEF->resource (), starting
     466                 :             : // immediately before the point at which DEF occurs.  Ignore clobbers
     467                 :             : // if IGNORE_CLOBBERS_SETTING is YES, otherwise treat them like any other
     468                 :             : // access.  Also ignore any access A for which IGNORE (access_insn (A))
     469                 :             : // is true.
     470                 :             : //
     471                 :             : // Thus if DEF->insn () uses DEF->resource (), that use is the first access
     472                 :             : // that the function considers, since an instruction's uses occur strictly
     473                 :             : // before its definitions.
     474                 :             : //
     475                 :             : // Note that this function does not consider separately-recorded call clobbers,
     476                 :             : // although such clobbers are only relevant if IGNORE_CLOBBERS_SETTING is NO.
     477                 :             : template<typename IgnorePredicate>
     478                 :             : inline access_info *
     479                 :    41459701 : prev_access_ignoring (def_info *def, ignore_clobbers ignore_clobbers_setting,
     480                 :             :                       IgnorePredicate ignore)
     481                 :             : {
     482                 :    41459701 :   return last_access_ignoring (def->prev_def (), ignore_clobbers_setting,
     483                 :    41459701 :                                ignore);
     484                 :             : }
     485                 :             : 
     486                 :             : // If DEF is null, return null.
     487                 :             : //
     488                 :             : // Otherwise, search forwards for a definition of DEF->resource (),
     489                 :             : // starting at DEF itself.  Ignore clobbers if IGNORE_CLOBBERS_SETTING
     490                 :             : // is YES, otherwise treat them like any other access.  Also ignore any
     491                 :             : // definition D for which IGNORE (D->insn ()) is true.
     492                 :             : //
     493                 :             : // Return the definition found, or null if there is no access that meets
     494                 :             : // the criteria.
     495                 :             : //
     496                 :             : // Note that this function does not consider separately-recorded call clobbers,
     497                 :             : // although such clobbers are only relevant if IGNORE_CLOBBERS_SETTING is NO.
     498                 :             : template<typename IgnorePredicate>
     499                 :             : def_info *
     500                 :   109940816 : first_def_ignoring (def_info *def, ignore_clobbers ignore_clobbers_setting,
     501                 :             :                     IgnorePredicate ignore)
     502                 :             : {
     503                 :   109940816 :   while (def)
     504                 :             :     {
     505                 :    55936635 :       auto *clobber = dyn_cast<clobber_info *> (def);
     506                 :    55936635 :       if (clobber && ignore_clobbers_setting == ignore_clobbers::YES)
     507                 :     8781081 :         def = last_clobber_in_group (clobber);
     508                 :    47155554 :       else if (!ignore (def->insn ()))
     509                 :    39253546 :         return def;
     510                 :             : 
     511                 :   126623905 :       def = def->next_def ();
     512                 :             :     }
     513                 :             :   return nullptr;
     514                 :             : }
     515                 :             : 
     516                 :             : // Search forwards for the next access to DEF->resource (),
     517                 :             : // starting immediately after DEF's instruction.  Ignore clobbers if
     518                 :             : // IGNORE_CLOBBERS_SETTING is YES, otherwise treat them like any other access.
     519                 :             : // Also ignore any access A for which IGNORE (access_insn (A)) is true;
     520                 :             : // in this context, ignoring a set includes ignoring all uses of the set.
     521                 :             : //
     522                 :             : // Thus if DEF is a set with uses by nondebug insns, the first access that the
     523                 :             : // function considers is the first such use of the set.
     524                 :             : //
     525                 :             : // Return the access found, or null if there is no access that meets the
     526                 :             : // criteria.
     527                 :             : //
     528                 :             : // Note that this function does not consider separately-recorded call clobbers,
     529                 :             : // although such clobbers are only relevant if IGNORE_CLOBBERS_SETTING is NO.
     530                 :             : template<typename IgnorePredicate>
     531                 :             : access_info *
     532                 :    41459701 : next_access_ignoring (def_info *def, ignore_clobbers ignore_clobbers_setting,
     533                 :             :                       IgnorePredicate ignore)
     534                 :             : {
     535                 :    41459701 :   if (use_info *use = first_nondebug_insn_use_ignoring (def, ignore))
     536                 :             :     return use;
     537                 :             : 
     538                 :    19462712 :   return first_def_ignoring (def->next_def (), ignore_clobbers_setting,
     539                 :    19462712 :                              ignore);
     540                 :             : }
     541                 :             : 
     542                 :             : // Return true if ACCESS1 should before ACCESS2 in an access_array.
     543                 :             : inline bool
     544                 :   346734728 : compare_access_infos (const access_info *access1, const access_info *access2)
     545                 :             : {
     546                 :   346734728 :   gcc_checking_assert (access1 == access2
     547                 :             :                        || access1->regno () != access2->regno ());
     548                 :   346734728 :   return access1->regno () < access2->regno ();
     549                 :             : }
     550                 :             : 
     551                 :             : // Sort [BEGIN, END) into ascending regno order.  The sequence must have
     552                 :             : // at most one access to a given a regno.
     553                 :             : inline void
     554                 :   248518204 : sort_accesses (access_info **begin, access_info **end)
     555                 :             : {
     556                 :   248518204 :   auto count = end - begin;
     557                 :   248518204 :   if (count <= 1)
     558                 :             :     return;
     559                 :             : 
     560                 :    90893327 :   if (count == 2)
     561                 :             :     {
     562                 :    58785369 :       gcc_checking_assert (begin[0]->regno () != begin[1]->regno ());
     563                 :    58785369 :       if (begin[0]->regno () > begin[1]->regno ())
     564                 :    40437316 :         std::swap (begin[0], begin[1]);
     565                 :    58785369 :       return;
     566                 :             :     }
     567                 :             : 
     568                 :    32107958 :   std::sort (begin, end, compare_access_infos);
     569                 :             : }
     570                 :             : 
     571                 :             : // Sort the accesses in CONTAINER, which contains pointers to access_infos.
     572                 :             : template<typename T>
     573                 :             : inline void
     574                 :   248518204 : sort_accesses (T &container)
     575                 :             : {
     576                 :   745554612 :   return sort_accesses (container.begin (), container.end ());
     577                 :             : }
     578                 :             : 
     579                 :             : // The underlying non-template implementation of merge_access_arrays.
     580                 :             : access_array merge_access_arrays_base (obstack_watermark &, access_array,
     581                 :             :                                        access_array);
     582                 :             : // Merge access arrays ACCESSES1 and ACCESSES2, including the allocation
     583                 :             : // in the area governed by WATERMARK.  Return an invalid access_array if
     584                 :             : // ACCESSES1 and ACCESSES2 contain conflicting accesses to the same resource.
     585                 :             : //
     586                 :             : // T can be an access_array, a def_array or a use_array.
     587                 :             : template<typename T>
     588                 :             : inline T
     589                 :    30200567 : merge_access_arrays (obstack_watermark &watermark, T accesses1, T accesses2)
     590                 :             : {
     591                 :    30200567 :   return T (merge_access_arrays_base (watermark, accesses1, accesses2));
     592                 :             : }
     593                 :             : 
     594                 :             : // The underlying non-template implementation of insert_access.
     595                 :             : access_array insert_access_base (obstack_watermark &, access_info *,
     596                 :             :                                  access_array);
     597                 :             : 
     598                 :             : // Return a new access_array that contains the result of inserting ACCESS1
     599                 :             : // into sorted access array ACCESSES2.  Allocate the returned array in the
     600                 :             : // area governed by WATERMARK.  Return an invalid access_array if ACCESSES2
     601                 :             : // contains a conflicting access to the same resource as ACCESS1.
     602                 :             : //
     603                 :             : // T can be an access_array, a def_array or a use_array.
     604                 :             : template<typename T>
     605                 :             : inline T
     606                 :     1650641 : insert_access (obstack_watermark &watermark,
     607                 :             :                typename T::value_type access1, T accesses2)
     608                 :             : {
     609                 :     1650641 :   return T (insert_access_base (watermark, access1, accesses2));
     610                 :             : }
     611                 :             : 
     612                 :             : // Return a copy of USES that drops any use of DEF.
     613                 :             : use_array remove_uses_of_def (obstack_watermark &, use_array uses,
     614                 :             :                               def_info *def);
     615                 :             : 
     616                 :             : // The underlying non-template implementation of remove_note_accesses.
     617                 :             : access_array remove_note_accesses_base (obstack_watermark &, access_array);
     618                 :             : 
     619                 :             : // If ACCESSES contains accesses that only occur in notes, return a new
     620                 :             : // array without such accesses, allocating it in the area governed by
     621                 :             : // WATERMARK.  Return ACCESSES itself otherwise.
     622                 :             : //
     623                 :             : // T can be an access_array, a def_array or a use_array.
     624                 :             : template<typename T>
     625                 :             : inline T
     626                 :    41913914 : remove_note_accesses (obstack_watermark &watermark, T accesses)
     627                 :             : {
     628                 :    41913914 :   return T (remove_note_accesses_base (watermark, accesses));
     629                 :             : }
     630                 :             : 
     631                 :             : // Return true if ACCESSES1 and ACCESSES2 have at least one resource in common.
     632                 :             : bool accesses_reference_same_resource (access_array accesses1,
     633                 :             :                                        access_array accesses2);
     634                 :             : 
     635                 :             : // Return true if INSN clobbers the value of any resources in ACCESSES.
     636                 :             : bool insn_clobbers_resources (insn_info *insn, access_array accesses);
     637                 :             : 
     638                 :             : }
        

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.