LCOV - code coverage report
Current view: top level - gcc - gimple-expr.cc (source / functions) Coverage Total Hit
Test: gcc.info Lines: 93.4 % 377 352
Test Date: 2024-04-20 14:03:02 Functions: 94.1 % 34 32
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: - 0 0

             Branch data     Line data    Source code
       1                 :             : /* Gimple decl, type, and expression support functions.
       2                 :             : 
       3                 :             :    Copyright (C) 2007-2024 Free Software Foundation, Inc.
       4                 :             :    Contributed by Aldy Hernandez <aldyh@redhat.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                 :             : #include "config.h"
      23                 :             : #include "system.h"
      24                 :             : #include "coretypes.h"
      25                 :             : #include "backend.h"
      26                 :             : #include "tree.h"
      27                 :             : #include "gimple.h"
      28                 :             : #include "stringpool.h"
      29                 :             : #include "gimple-ssa.h"
      30                 :             : #include "fold-const.h"
      31                 :             : #include "tree-eh.h"
      32                 :             : #include "gimplify.h"
      33                 :             : #include "stor-layout.h"
      34                 :             : #include "demangle.h"
      35                 :             : #include "hash-set.h"
      36                 :             : #include "rtl.h"
      37                 :             : #include "tree-pass.h"
      38                 :             : #include "stringpool.h"
      39                 :             : #include "attribs.h"
      40                 :             : #include "target.h"
      41                 :             : 
      42                 :             : /* ----- Type related -----  */
      43                 :             : 
      44                 :             : /* Return true if the conversion from INNER_TYPE to OUTER_TYPE is a
      45                 :             :    useless type conversion, otherwise return false.
      46                 :             : 
      47                 :             :    This function implicitly defines the middle-end type system.  With
      48                 :             :    the notion of 'a < b' meaning that useless_type_conversion_p (a, b)
      49                 :             :    holds and 'a > b' meaning that useless_type_conversion_p (b, a) holds,
      50                 :             :    the following invariants shall be fulfilled:
      51                 :             : 
      52                 :             :      1) useless_type_conversion_p is transitive.
      53                 :             :         If a < b and b < c then a < c.
      54                 :             : 
      55                 :             :      2) useless_type_conversion_p is not symmetric.
      56                 :             :         From a < b does not follow a > b.
      57                 :             : 
      58                 :             :      3) Types define the available set of operations applicable to values.
      59                 :             :         A type conversion is useless if the operations for the target type
      60                 :             :         is a subset of the operations for the source type.  For example
      61                 :             :         casts to void* are useless, casts from void* are not (void* can't
      62                 :             :         be dereferenced or offsetted, but copied, hence its set of operations
      63                 :             :         is a strict subset of that of all other data pointer types).  Casts
      64                 :             :         to const T* are useless (can't be written to), casts from const T*
      65                 :             :         to T* are not.  */
      66                 :             : 
      67                 :             : bool
      68                 : 10604845631 : useless_type_conversion_p (tree outer_type, tree inner_type)
      69                 :             : {
      70                 :             :   /* Do the following before stripping toplevel qualifiers.  */
      71                 : 10605222789 :   if (POINTER_TYPE_P (inner_type)
      72                 :  2629944963 :       && POINTER_TYPE_P (outer_type))
      73                 :             :     {
      74                 :             :       /* Do not lose casts between pointers to different address spaces.  */
      75                 :  2606794318 :       if (TYPE_ADDR_SPACE (TREE_TYPE (outer_type))
      76                 :  2606794318 :           != TYPE_ADDR_SPACE (TREE_TYPE (inner_type)))
      77                 :             :         return false;
      78                 :             :       /* Do not lose casts to function pointer types.  */
      79                 :  5144008854 :       if (FUNC_OR_METHOD_TYPE_P (TREE_TYPE (outer_type))
      80                 :  2613155405 :           && !FUNC_OR_METHOD_TYPE_P (TREE_TYPE (inner_type)))
      81                 :             :         return false;
      82                 :             :     }
      83                 :             : 
      84                 :             :   /* From now on qualifiers on value types do not matter.  */
      85                 : 10603825169 :   inner_type = TYPE_MAIN_VARIANT (inner_type);
      86                 : 10603825169 :   outer_type = TYPE_MAIN_VARIANT (outer_type);
      87                 :             : 
      88                 : 10603825169 :   if (inner_type == outer_type)
      89                 :             :     return true;
      90                 :             : 
      91                 :             :   /* Changes in machine mode are never useless conversions because the RTL
      92                 :             :      middle-end expects explicit conversions between modes.  */
      93                 :   883383815 :   if (TYPE_MODE (inner_type) != TYPE_MODE (outer_type))
      94                 :             :     return false;
      95                 :             : 
      96                 :             :   /* If both the inner and outer types are integral types, then the
      97                 :             :      conversion is not necessary if they have the same mode and
      98                 :             :      signedness and precision, and both or neither are boolean.  */
      99                 :   782171328 :   if (INTEGRAL_TYPE_P (inner_type)
     100                 :   145332586 :       && INTEGRAL_TYPE_P (outer_type))
     101                 :             :     {
     102                 :             :       /* Preserve changes in signedness or precision.  */
     103                 :   135733367 :       if (TYPE_UNSIGNED (inner_type) != TYPE_UNSIGNED (outer_type)
     104                 :   135733367 :           || TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
     105                 :             :         return false;
     106                 :             : 
     107                 :             :       /* Preserve conversions to/from BOOLEAN_TYPE if types are not
     108                 :             :          of precision one.  */
     109                 :    50370235 :       if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
     110                 :    50370235 :            != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
     111                 :    50370235 :           && TYPE_PRECISION (outer_type) != 1)
     112                 :             :         return false;
     113                 :             : 
     114                 :             :       /* Preserve conversions to/from BITINT_TYPE.  While we don't
     115                 :             :          need to care that much about such conversions within a function's
     116                 :             :          body, we need to prevent changing BITINT_TYPE to INTEGER_TYPE
     117                 :             :          of the same precision or vice versa when passed to functions,
     118                 :             :          especially for varargs.  */
     119                 :    50347534 :       if ((TREE_CODE (inner_type) == BITINT_TYPE)
     120                 :    50347534 :           != (TREE_CODE (outer_type) == BITINT_TYPE))
     121                 :             :         return false;
     122                 :             : 
     123                 :             :       /* We don't need to preserve changes in the types minimum or
     124                 :             :          maximum value in general as these do not generate code
     125                 :             :          unless the types precisions are different.  */
     126                 :             :       return true;
     127                 :             :     }
     128                 :             : 
     129                 :             :   /* Scalar floating point types with the same mode are compatible.  */
     130                 :   646437961 :   else if (SCALAR_FLOAT_TYPE_P (inner_type)
     131                 :      539181 :            && SCALAR_FLOAT_TYPE_P (outer_type))
     132                 :             :     return true;
     133                 :             : 
     134                 :             :   /* Fixed point types with the same mode are compatible.  */
     135                 :   645901785 :   else if (FIXED_POINT_TYPE_P (inner_type)
     136                 :           0 :            && FIXED_POINT_TYPE_P (outer_type))
     137                 :           0 :     return TYPE_SATURATING (inner_type) == TYPE_SATURATING (outer_type);
     138                 :             : 
     139                 :             :   /* We need to take special care recursing to pointed-to types.  */
     140                 :   645901785 :   else if (POINTER_TYPE_P (inner_type)
     141                 :   621343099 :            && POINTER_TYPE_P (outer_type))
     142                 :             :     {
     143                 :             :       /* We do not care for const qualification of the pointed-to types
     144                 :             :          as const qualification has no semantic value to the middle-end.  */
     145                 :             : 
     146                 :             :       /* Otherwise pointers/references are equivalent.  */
     147                 :             :       return true;
     148                 :             :     }
     149                 :             : 
     150                 :             :   /* Recurse for complex types.  */
     151                 :    40723835 :   else if (TREE_CODE (inner_type) == COMPLEX_TYPE
     152                 :       33832 :            && TREE_CODE (outer_type) == COMPLEX_TYPE)
     153                 :       32984 :     return useless_type_conversion_p (TREE_TYPE (outer_type),
     154                 :       65968 :                                       TREE_TYPE (inner_type));
     155                 :             : 
     156                 :             :   /* Recurse for vector types with the same number of subparts.  */
     157                 :    40690851 :   else if (VECTOR_TYPE_P (inner_type)
     158                 :     8587695 :            && VECTOR_TYPE_P (outer_type))
     159                 :    17119362 :     return (known_eq (TYPE_VECTOR_SUBPARTS (inner_type),
     160                 :             :                       TYPE_VECTOR_SUBPARTS (outer_type))
     161                 :     8555419 :             && useless_type_conversion_p (TREE_TYPE (outer_type),
     162                 :     8555419 :                                           TREE_TYPE (inner_type))
     163                 :    16864476 :             && targetm.compatible_vector_types_p (inner_type, outer_type));
     164                 :             : 
     165                 :    32131170 :   else if (TREE_CODE (inner_type) == ARRAY_TYPE
     166                 :      638399 :            && TREE_CODE (outer_type) == ARRAY_TYPE)
     167                 :             :     {
     168                 :             :       /* Preserve various attributes.  */
     169                 :      511493 :       if (TYPE_REVERSE_STORAGE_ORDER (inner_type)
     170                 :      511493 :           != TYPE_REVERSE_STORAGE_ORDER (outer_type))
     171                 :             :         return false;
     172                 :      511493 :       if (TYPE_STRING_FLAG (inner_type) != TYPE_STRING_FLAG (outer_type))
     173                 :             :         return false;
     174                 :             : 
     175                 :             :       /* Conversions from array types with unknown extent to
     176                 :             :          array types with known extent are not useless.  */
     177                 :      474619 :       if (!TYPE_DOMAIN (inner_type) && TYPE_DOMAIN (outer_type))
     178                 :             :         return false;
     179                 :             : 
     180                 :             :       /* Nor are conversions from array types with non-constant size to
     181                 :             :          array types with constant size or to different size.  */
     182                 :      471868 :       if (TYPE_SIZE (outer_type)
     183                 :      459471 :           && TREE_CODE (TYPE_SIZE (outer_type)) == INTEGER_CST
     184                 :      915114 :           && (!TYPE_SIZE (inner_type)
     185                 :      442473 :               || TREE_CODE (TYPE_SIZE (inner_type)) != INTEGER_CST
     186                 :      440317 :               || !tree_int_cst_equal (TYPE_SIZE (outer_type),
     187                 :      440317 :                                       TYPE_SIZE (inner_type))))
     188                 :       42131 :         return false;
     189                 :             : 
     190                 :             :       /* Check conversions between arrays with partially known extents.
     191                 :             :          If the array min/max values are constant they have to match.
     192                 :             :          Otherwise allow conversions to unknown and variable extents.
     193                 :             :          In particular this declares conversions that may change the
     194                 :             :          mode to BLKmode as useless.  */
     195                 :      429737 :       if (TYPE_DOMAIN (inner_type)
     196                 :      429737 :           && TYPE_DOMAIN (outer_type)
     197                 :      859463 :           && TYPE_DOMAIN (inner_type) != TYPE_DOMAIN (outer_type))
     198                 :             :         {
     199                 :      109092 :           tree inner_min = TYPE_MIN_VALUE (TYPE_DOMAIN (inner_type));
     200                 :      109092 :           tree outer_min = TYPE_MIN_VALUE (TYPE_DOMAIN (outer_type));
     201                 :      109092 :           tree inner_max = TYPE_MAX_VALUE (TYPE_DOMAIN (inner_type));
     202                 :      109092 :           tree outer_max = TYPE_MAX_VALUE (TYPE_DOMAIN (outer_type));
     203                 :             : 
     204                 :             :           /* After gimplification a variable min/max value carries no
     205                 :             :              additional information compared to a NULL value.  All that
     206                 :             :              matters has been lowered to be part of the IL.  */
     207                 :      109092 :           if (inner_min && TREE_CODE (inner_min) != INTEGER_CST)
     208                 :           0 :             inner_min = NULL_TREE;
     209                 :      109092 :           if (outer_min && TREE_CODE (outer_min) != INTEGER_CST)
     210                 :           0 :             outer_min = NULL_TREE;
     211                 :      109092 :           if (inner_max && TREE_CODE (inner_max) != INTEGER_CST)
     212                 :       14131 :             inner_max = NULL_TREE;
     213                 :      109092 :           if (outer_max && TREE_CODE (outer_max) != INTEGER_CST)
     214                 :       16998 :             outer_max = NULL_TREE;
     215                 :             : 
     216                 :             :           /* Conversions NULL / variable <- cst are useless, but not
     217                 :             :              the other way around.  */
     218                 :      109092 :           if (outer_min
     219                 :      109092 :               && (!inner_min
     220                 :      109092 :                   || !tree_int_cst_equal (inner_min, outer_min)))
     221                 :       25751 :             return false;
     222                 :       83341 :           if (outer_max
     223                 :       83341 :               && (!inner_max
     224                 :       66331 :                   || !tree_int_cst_equal (inner_max, outer_max)))
     225                 :       59812 :             return false;
     226                 :             :         }
     227                 :             : 
     228                 :             :       /* Recurse on the element check.  */
     229                 :      344174 :       return useless_type_conversion_p (TREE_TYPE (outer_type),
     230                 :      688348 :                                         TREE_TYPE (inner_type));
     231                 :             :     }
     232                 :             : 
     233                 :    31619677 :   else if (FUNC_OR_METHOD_TYPE_P (inner_type)
     234                 :      300531 :            && TREE_CODE (inner_type) == TREE_CODE (outer_type))
     235                 :             :     {
     236                 :      295454 :       tree outer_parm, inner_parm;
     237                 :             : 
     238                 :             :       /* If the return types are not compatible bail out.  */
     239                 :      295454 :       if (!useless_type_conversion_p (TREE_TYPE (outer_type),
     240                 :      295454 :                                       TREE_TYPE (inner_type)))
     241                 :             :         return false;
     242                 :             : 
     243                 :             :       /* Method types should belong to a compatible base class.  */
     244                 :      288117 :       if (TREE_CODE (inner_type) == METHOD_TYPE
     245                 :      293343 :           && !useless_type_conversion_p (TYPE_METHOD_BASETYPE (outer_type),
     246                 :        5226 :                                          TYPE_METHOD_BASETYPE (inner_type)))
     247                 :             :         return false;
     248                 :             : 
     249                 :             :       /* A conversion to an unprototyped argument list is ok.  */
     250                 :      285602 :       if (!prototype_p (outer_type))
     251                 :             :         return true;
     252                 :             : 
     253                 :             :       /* If the unqualified argument types are compatible the conversion
     254                 :             :          is useless.  */
     255                 :      285474 :       if (TYPE_ARG_TYPES (outer_type) == TYPE_ARG_TYPES (inner_type))
     256                 :             :         return true;
     257                 :             : 
     258                 :      281580 :       for (outer_parm = TYPE_ARG_TYPES (outer_type),
     259                 :      281580 :            inner_parm = TYPE_ARG_TYPES (inner_type);
     260                 :     1168459 :            outer_parm && inner_parm;
     261                 :      886879 :            outer_parm = TREE_CHAIN (outer_parm),
     262                 :      886879 :            inner_parm = TREE_CHAIN (inner_parm))
     263                 :     1779136 :         if (!useless_type_conversion_p
     264                 :      889568 :                (TYPE_MAIN_VARIANT (TREE_VALUE (outer_parm)),
     265                 :      889568 :                 TYPE_MAIN_VARIANT (TREE_VALUE (inner_parm))))
     266                 :             :           return false;
     267                 :             : 
     268                 :             :       /* If there is a mismatch in the number of arguments the functions
     269                 :             :          are not compatible.  */
     270                 :      278891 :       if (outer_parm || inner_parm)
     271                 :             :         return false;
     272                 :             : 
     273                 :             :       /* Defer to the target if necessary.  */
     274                 :      272781 :       if (TYPE_ATTRIBUTES (inner_type) || TYPE_ATTRIBUTES (outer_type))
     275                 :      269346 :         return comp_type_attributes (outer_type, inner_type) != 0;
     276                 :             : 
     277                 :             :       return true;
     278                 :             :     }
     279                 :             : 
     280                 :             :   /* For aggregates we rely on TYPE_CANONICAL exclusively and require
     281                 :             :      explicit conversions for types involving to be structurally
     282                 :             :      compared types.  */
     283                 :    31324223 :   else if (AGGREGATE_TYPE_P (inner_type)
     284                 :     5510918 :            && TREE_CODE (inner_type) == TREE_CODE (outer_type))
     285                 :     4541451 :     return TYPE_CANONICAL (inner_type)
     286                 :     4541451 :            && TYPE_CANONICAL (inner_type) == TYPE_CANONICAL (outer_type);
     287                 :             : 
     288                 :    26782772 :   else if (TREE_CODE (inner_type) == OFFSET_TYPE
     289                 :       11976 :            && TREE_CODE (outer_type) == OFFSET_TYPE)
     290                 :        2260 :     return useless_type_conversion_p (TREE_TYPE (outer_type),
     291                 :        2260 :                                       TREE_TYPE (inner_type))
     292                 :        4291 :            && useless_type_conversion_p
     293                 :        2031 :                 (TYPE_OFFSET_BASETYPE (outer_type),
     294                 :        2031 :                  TYPE_OFFSET_BASETYPE (inner_type));
     295                 :             : 
     296                 :             :   return false;
     297                 :             : }
     298                 :             : 
     299                 :             : 
     300                 :             : /* ----- Decl related -----  */
     301                 :             : 
     302                 :             : /* Set sequence SEQ to be the GIMPLE body for function FN.  */
     303                 :             : 
     304                 :             : void
     305                 :    97134714 : gimple_set_body (tree fndecl, gimple_seq seq)
     306                 :             : {
     307                 :    97134714 :   struct function *fn = DECL_STRUCT_FUNCTION (fndecl);
     308                 :    97134714 :   if (fn == NULL)
     309                 :             :     {
     310                 :             :       /* If FNDECL still does not have a function structure associated
     311                 :             :          with it, then it does not make sense for it to receive a
     312                 :             :          GIMPLE body.  */
     313                 :          70 :       gcc_assert (seq == NULL);
     314                 :             :     }
     315                 :             :   else
     316                 :    97134644 :     fn->gimple_body = seq;
     317                 :    97134714 : }
     318                 :             : 
     319                 :             : 
     320                 :             : /* Return the body of GIMPLE statements for function FN.  After the
     321                 :             :    CFG pass, the function body doesn't exist anymore because it has
     322                 :             :    been split up into basic blocks.  In this case, it returns
     323                 :             :    NULL.  */
     324                 :             : 
     325                 :             : gimple_seq
     326                 :   440382482 : gimple_body (tree fndecl)
     327                 :             : {
     328                 :   440382482 :   struct function *fn = DECL_STRUCT_FUNCTION (fndecl);
     329                 :   440382482 :   return fn ? fn->gimple_body : NULL;
     330                 :             : }
     331                 :             : 
     332                 :             : /* Return true when FNDECL has Gimple body either in unlowered
     333                 :             :    or CFG form.  */
     334                 :             : bool
     335                 :   409697746 : gimple_has_body_p (tree fndecl)
     336                 :             : {
     337                 :   409697746 :   struct function *fn = DECL_STRUCT_FUNCTION (fndecl);
     338                 :   409697746 :   return (gimple_body (fndecl) || (fn && fn->cfg && !(fn->curr_properties & PROP_rtl)));
     339                 :             : }
     340                 :             : 
     341                 :             : /* Return a printable name for symbol DECL.  */
     342                 :             : 
     343                 :             : const char *
     344                 :       26672 : gimple_decl_printable_name (tree decl, int verbosity)
     345                 :             : {
     346                 :       26672 :   if (!DECL_NAME (decl))
     347                 :             :     return NULL;
     348                 :             : 
     349                 :       26672 :   if (HAS_DECL_ASSEMBLER_NAME_P (decl) && DECL_ASSEMBLER_NAME_SET_P (decl))
     350                 :             :     {
     351                 :       26301 :       int dmgl_opts = DMGL_NO_OPTS;
     352                 :             : 
     353                 :       26301 :       if (verbosity >= 2)
     354                 :             :         {
     355                 :        3617 :           dmgl_opts = DMGL_VERBOSE
     356                 :             :                       | DMGL_ANSI
     357                 :             :                       | DMGL_GNU_V3
     358                 :             :                       | DMGL_RET_POSTFIX;
     359                 :        3617 :           if (TREE_CODE (decl) == FUNCTION_DECL)
     360                 :        3544 :             dmgl_opts |= DMGL_PARAMS;
     361                 :             :         }
     362                 :             : 
     363                 :       26301 :       const char *mangled_str
     364                 :       26301 :         = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME_RAW (decl));
     365                 :       26301 :       const char *str = cplus_demangle_v3 (mangled_str, dmgl_opts);
     366                 :       51280 :       return str ? str : mangled_str;
     367                 :             :     }
     368                 :             : 
     369                 :         371 :   return IDENTIFIER_POINTER (DECL_NAME (decl));
     370                 :             : }
     371                 :             : 
     372                 :             : 
     373                 :             : /* Create a new VAR_DECL and copy information from VAR to it.  */
     374                 :             : 
     375                 :             : tree
     376                 :     1466896 : copy_var_decl (tree var, tree name, tree type)
     377                 :             : {
     378                 :     1466896 :   tree copy = build_decl (DECL_SOURCE_LOCATION (var), VAR_DECL, name, type);
     379                 :             : 
     380                 :     1466896 :   TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (var);
     381                 :     1466896 :   TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (var);
     382                 :     1466896 :   DECL_NOT_GIMPLE_REG_P (copy) = DECL_NOT_GIMPLE_REG_P (var);
     383                 :     1466896 :   DECL_ARTIFICIAL (copy) = DECL_ARTIFICIAL (var);
     384                 :     1466896 :   DECL_IGNORED_P (copy) = DECL_IGNORED_P (var);
     385                 :     1466896 :   DECL_CONTEXT (copy) = DECL_CONTEXT (var);
     386                 :     1466896 :   TREE_USED (copy) = 1;
     387                 :     1466896 :   DECL_SEEN_IN_BIND_EXPR_P (copy) = 1;
     388                 :     1466896 :   DECL_ATTRIBUTES (copy) = DECL_ATTRIBUTES (var);
     389                 :     1466896 :   if (DECL_USER_ALIGN (var))
     390                 :             :     {
     391                 :          49 :       SET_DECL_ALIGN (copy, DECL_ALIGN (var));
     392                 :          49 :       DECL_USER_ALIGN (copy) = 1;
     393                 :             :     }
     394                 :             : 
     395                 :     1466896 :   copy_warning (copy, var);
     396                 :     1466896 :   return copy;
     397                 :             : }
     398                 :             : 
     399                 :             : /* Strip off a legitimate source ending from the input string NAME of
     400                 :             :    length LEN.  Rather than having to know the names used by all of
     401                 :             :    our front ends, we strip off an ending of a period followed by
     402                 :             :    up to four characters.  (like ".cpp".)  */
     403                 :             : 
     404                 :             : static inline void
     405                 :    22554340 : remove_suffix (char *name, int len)
     406                 :             : {
     407                 :    22554340 :   int i;
     408                 :             : 
     409                 :    83751466 :   for (i = 2;  i < 7 && len > i;  i++)
     410                 :             :     {
     411                 :    62342575 :       if (name[len - i] == '.')
     412                 :             :         {
     413                 :     1145449 :           name[len - i] = '\0';
     414                 :     1145449 :           break;
     415                 :             :         }
     416                 :             :     }
     417                 :    22554340 : }
     418                 :             : 
     419                 :             : /* Create a new temporary name with PREFIX.  Return an identifier.  */
     420                 :             : 
     421                 :             : static GTY(()) unsigned int tmp_var_id_num;
     422                 :             : 
     423                 :             : tree
     424                 :    22554340 : create_tmp_var_name (const char *prefix)
     425                 :             : {
     426                 :    22554340 :   char *tmp_name;
     427                 :             : 
     428                 :    22554340 :   if (prefix)
     429                 :             :     {
     430                 :    22554340 :       char *preftmp = ASTRDUP (prefix);
     431                 :             : 
     432                 :    22554340 :       remove_suffix (preftmp, strlen (preftmp));
     433                 :    22554340 :       clean_symbol_name (preftmp);
     434                 :             : 
     435                 :    22554340 :       prefix = preftmp;
     436                 :             :     }
     437                 :             : 
     438                 :    22554340 :   ASM_FORMAT_PRIVATE_NAME (tmp_name, prefix ? prefix : "T", tmp_var_id_num++);
     439                 :    22554340 :   return get_identifier (tmp_name);
     440                 :             : }
     441                 :             : 
     442                 :             : /* Create a new temporary variable declaration of type TYPE.
     443                 :             :    Do NOT push it into the current binding.  */
     444                 :             : 
     445                 :             : tree
     446                 :    25299258 : create_tmp_var_raw (tree type, const char *prefix)
     447                 :             : {
     448                 :    25299258 :   tree tmp_var;
     449                 :             : 
     450                 :    44333453 :   tmp_var = build_decl (input_location,
     451                 :    19034195 :                         VAR_DECL, prefix ? create_tmp_var_name (prefix) : NULL,
     452                 :             :                         type);
     453                 :             : 
     454                 :             :   /* The variable was declared by the compiler.  */
     455                 :    25299258 :   DECL_ARTIFICIAL (tmp_var) = 1;
     456                 :             :   /* And we don't want debug info for it.  */
     457                 :    25299258 :   DECL_IGNORED_P (tmp_var) = 1;
     458                 :             :   /* And we don't want even the fancy names of those printed in
     459                 :             :      -fdump-final-insns= dumps.  */
     460                 :    25299258 :   DECL_NAMELESS (tmp_var) = 1;
     461                 :             : 
     462                 :             :   /* Make the variable writable.  */
     463                 :    25299258 :   TREE_READONLY (tmp_var) = 0;
     464                 :             : 
     465                 :    25299258 :   DECL_EXTERNAL (tmp_var) = 0;
     466                 :    25299258 :   TREE_STATIC (tmp_var) = 0;
     467                 :    25299258 :   TREE_USED (tmp_var) = 1;
     468                 :             : 
     469                 :    25299258 :   return tmp_var;
     470                 :             : }
     471                 :             : 
     472                 :             : /* Create a new temporary variable declaration of type TYPE.  DO push the
     473                 :             :    variable into the current binding.  Further, assume that this is called
     474                 :             :    only from gimplification or optimization, at which point the creation of
     475                 :             :    certain types are bugs.  */
     476                 :             : 
     477                 :             : tree
     478                 :    14898965 : create_tmp_var (tree type, const char *prefix)
     479                 :             : {
     480                 :    14898965 :   tree tmp_var;
     481                 :             : 
     482                 :             :   /* We don't allow types that are addressable (meaning we can't make copies),
     483                 :             :      or incomplete.  We also used to reject every variable size objects here,
     484                 :             :      but now support those for which a constant upper bound can be obtained.
     485                 :             :      The processing for variable sizes is performed in gimple_add_tmp_var,
     486                 :             :      point at which it really matters and possibly reached via paths not going
     487                 :             :      through this function, e.g. after direct calls to create_tmp_var_raw.  */
     488                 :    14898965 :   gcc_assert (!TREE_ADDRESSABLE (type) && COMPLETE_TYPE_P (type));
     489                 :             : 
     490                 :    14898965 :   tmp_var = create_tmp_var_raw (type, prefix);
     491                 :    14898965 :   gimple_add_tmp_var (tmp_var);
     492                 :    14898965 :   return tmp_var;
     493                 :             : }
     494                 :             : 
     495                 :             : /* Create a new temporary variable declaration of type TYPE by calling
     496                 :             :    create_tmp_var and if TYPE is a vector or a complex number, mark the new
     497                 :             :    temporary as gimple register.  */
     498                 :             : 
     499                 :             : tree
     500                 :     3355133 : create_tmp_reg (tree type, const char *prefix)
     501                 :             : {
     502                 :     3355133 :   return create_tmp_var (type, prefix);
     503                 :             : }
     504                 :             : 
     505                 :             : /* Create a new temporary variable declaration of type TYPE by calling
     506                 :             :    create_tmp_var and if TYPE is a vector or a complex number, mark the new
     507                 :             :    temporary as gimple register.  */
     508                 :             : 
     509                 :             : tree
     510                 :       21406 : create_tmp_reg_fn (struct function *fn, tree type, const char *prefix)
     511                 :             : {
     512                 :       21406 :   tree tmp;
     513                 :             : 
     514                 :       21406 :   tmp = create_tmp_var_raw (type, prefix);
     515                 :       21406 :   gimple_add_tmp_var_fn (fn, tmp);
     516                 :             : 
     517                 :       21406 :   return tmp;
     518                 :             : }
     519                 :             : 
     520                 :             : 
     521                 :             : /* ----- Expression related -----  */
     522                 :             : 
     523                 :             : /* Extract the operands and code for expression EXPR into *SUBCODE_P,
     524                 :             :    *OP1_P, *OP2_P and *OP3_P respectively.  */
     525                 :             : 
     526                 :             : void
     527                 :   159745323 : extract_ops_from_tree (tree expr, enum tree_code *subcode_p, tree *op1_p,
     528                 :             :                        tree *op2_p, tree *op3_p)
     529                 :             : {
     530                 :   159745323 :   *subcode_p = TREE_CODE (expr);
     531                 :   159745323 :   switch (get_gimple_rhs_class (*subcode_p))
     532                 :             :     {
     533                 :       82071 :     case GIMPLE_TERNARY_RHS:
     534                 :       82071 :       {
     535                 :       82071 :         *op1_p = TREE_OPERAND (expr, 0);
     536                 :       82071 :         *op2_p = TREE_OPERAND (expr, 1);
     537                 :       82071 :         *op3_p = TREE_OPERAND (expr, 2);
     538                 :       82071 :         break;
     539                 :             :       }
     540                 :    19190932 :     case GIMPLE_BINARY_RHS:
     541                 :    19190932 :       {
     542                 :    19190932 :         *op1_p = TREE_OPERAND (expr, 0);
     543                 :    19190932 :         *op2_p = TREE_OPERAND (expr, 1);
     544                 :    19190932 :         *op3_p = NULL_TREE;
     545                 :    19190932 :         break;
     546                 :             :       }
     547                 :    10438413 :     case GIMPLE_UNARY_RHS:
     548                 :    10438413 :       {
     549                 :    10438413 :         *op1_p = TREE_OPERAND (expr, 0);
     550                 :    10438413 :         *op2_p = NULL_TREE;
     551                 :    10438413 :         *op3_p = NULL_TREE;
     552                 :    10438413 :         break;
     553                 :             :       }
     554                 :   130033907 :     case GIMPLE_SINGLE_RHS:
     555                 :   130033907 :       {
     556                 :   130033907 :         *op1_p = expr;
     557                 :   130033907 :         *op2_p = NULL_TREE;
     558                 :   130033907 :         *op3_p = NULL_TREE;
     559                 :   130033907 :         break;
     560                 :             :       }
     561                 :           0 :     default:
     562                 :           0 :       gcc_unreachable ();
     563                 :             :     }
     564                 :   159745323 : }
     565                 :             : 
     566                 :             : /* Extract operands for a GIMPLE_COND statement out of COND_EXPR tree COND.  */
     567                 :             : 
     568                 :             : void
     569                 :     5478819 : gimple_cond_get_ops_from_tree (tree cond, enum tree_code *code_p,
     570                 :             :                                tree *lhs_p, tree *rhs_p)
     571                 :             : {
     572                 :     5478819 :   gcc_assert (COMPARISON_CLASS_P (cond)
     573                 :             :               || TREE_CODE (cond) == TRUTH_NOT_EXPR
     574                 :             :               || is_gimple_min_invariant (cond)
     575                 :             :               || SSA_VAR_P (cond));
     576                 :     5478819 :   gcc_checking_assert (!tree_could_throw_p (cond));
     577                 :             : 
     578                 :     5478819 :   extract_ops_from_tree (cond, code_p, lhs_p, rhs_p);
     579                 :             : 
     580                 :             :   /* Canonicalize conditionals of the form 'if (!VAL)'.  */
     581                 :     5478819 :   if (*code_p == TRUTH_NOT_EXPR)
     582                 :             :     {
     583                 :           0 :       *code_p = EQ_EXPR;
     584                 :           0 :       gcc_assert (*lhs_p && *rhs_p == NULL_TREE);
     585                 :           0 :       *rhs_p = build_zero_cst (TREE_TYPE (*lhs_p));
     586                 :             :     }
     587                 :             :   /* Canonicalize conditionals of the form 'if (VAL)'  */
     588                 :     5478819 :   else if (TREE_CODE_CLASS (*code_p) != tcc_comparison)
     589                 :             :     {
     590                 :     1571183 :       *code_p = NE_EXPR;
     591                 :     1571183 :       gcc_assert (*lhs_p && *rhs_p == NULL_TREE);
     592                 :     1571183 :       *rhs_p = build_zero_cst (TREE_TYPE (*lhs_p));
     593                 :             :     }
     594                 :     5478819 : }
     595                 :             : 
     596                 :             : /*  Return true if T is a valid LHS for a GIMPLE assignment expression.  */
     597                 :             : 
     598                 :             : bool
     599                 :   234030450 : is_gimple_lvalue (tree t)
     600                 :             : {
     601                 :   234030450 :   return (is_gimple_addressable (t)
     602                 :    12220893 :           || TREE_CODE (t) == WITH_SIZE_EXPR
     603                 :             :           /* These are complex lvalues, but don't have addresses, so they
     604                 :             :              go here.  */
     605                 :   246227704 :           || TREE_CODE (t) == BIT_FIELD_REF);
     606                 :             : }
     607                 :             : 
     608                 :             : /* Helper for is_gimple_condexpr and is_gimple_condexpr_for_cond.  */
     609                 :             : 
     610                 :             : static bool
     611                 :     8876354 : is_gimple_condexpr_1 (tree t, bool allow_traps, bool allow_cplx)
     612                 :             : {
     613                 :     8876354 :   tree op0;
     614                 :     8876354 :   return (is_gimple_val (t)
     615                 :     8876354 :           || (COMPARISON_CLASS_P (t)
     616                 :     6123570 :               && (allow_traps || !tree_could_throw_p (t))
     617                 :     6117080 :               && ((op0 = TREE_OPERAND (t, 0)), true)
     618                 :     6117080 :               && (allow_cplx || TREE_CODE (TREE_TYPE (op0)) != COMPLEX_TYPE)
     619                 :     6117080 :               && is_gimple_val (op0)
     620                 :     4828469 :               && is_gimple_val (TREE_OPERAND (t, 1))));
     621                 :             : }
     622                 :             : 
     623                 :             : /* Like is_gimple_condexpr, but does not allow T to trap.  */
     624                 :             : 
     625                 :             : bool
     626                 :     5871009 : is_gimple_condexpr_for_cond (tree t)
     627                 :             : {
     628                 :     5871009 :   return is_gimple_condexpr_1 (t, false, true);
     629                 :             : }
     630                 :             : 
     631                 :             : /* Canonicalize a tree T for use in a COND_EXPR as conditional.  Returns
     632                 :             :    a canonicalized tree that is valid for a COND_EXPR or NULL_TREE, if
     633                 :             :    we failed to create one.  */
     634                 :             : 
     635                 :             : tree
     636                 :     3005345 : canonicalize_cond_expr_cond (tree t)
     637                 :             : {
     638                 :             :   /* Strip conversions around boolean operations.  */
     639                 :     2874414 :   if (CONVERT_EXPR_P (t)
     640                 :     3005345 :       && (truth_value_p (TREE_CODE (TREE_OPERAND (t, 0)))
     641                 :      130130 :           || TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0)))
     642                 :             :              == BOOLEAN_TYPE))
     643                 :         801 :     t = TREE_OPERAND (t, 0);
     644                 :             : 
     645                 :             :   /* For !x use x == 0.  */
     646                 :     3005345 :   if (TREE_CODE (t) == TRUTH_NOT_EXPR)
     647                 :             :     {
     648                 :       29126 :       tree top0 = TREE_OPERAND (t, 0);
     649                 :       29126 :       t = build2 (EQ_EXPR, TREE_TYPE (t),
     650                 :       29126 :                   top0, build_int_cst (TREE_TYPE (top0), 0));
     651                 :             :     }
     652                 :             :   /* For cmp ? 1 : 0 use cmp.  */
     653                 :     2976219 :   else if (TREE_CODE (t) == COND_EXPR
     654                 :       61718 :            && COMPARISON_CLASS_P (TREE_OPERAND (t, 0))
     655                 :       59962 :            && integer_onep (TREE_OPERAND (t, 1))
     656                 :     3036181 :            && integer_zerop (TREE_OPERAND (t, 2)))
     657                 :             :     {
     658                 :       59962 :       tree top0 = TREE_OPERAND (t, 0);
     659                 :       59962 :       t = build2 (TREE_CODE (top0), TREE_TYPE (t),
     660                 :       59962 :                   TREE_OPERAND (top0, 0), TREE_OPERAND (top0, 1));
     661                 :             :     }
     662                 :             :   /* For x ^ y use x != y.  */
     663                 :     2916257 :   else if (TREE_CODE (t) == BIT_XOR_EXPR)
     664                 :           0 :     t = build2 (NE_EXPR, TREE_TYPE (t),
     665                 :           0 :                 TREE_OPERAND (t, 0), TREE_OPERAND (t, 1));
     666                 :             : 
     667                 :             :   /* We don't know where this will be used so allow both traps and
     668                 :             :      _Complex.  The caller is responsible for more precise checking.  */
     669                 :     3005345 :   if (is_gimple_condexpr_1 (t, true, true))
     670                 :     1088239 :     return t;
     671                 :             : 
     672                 :             :   return NULL_TREE;
     673                 :             : }
     674                 :             : 
     675                 :             : /* Return true if T is a gimple address.  */
     676                 :             : 
     677                 :             : bool
     678                 :           0 : is_gimple_address (const_tree t)
     679                 :             : {
     680                 :           0 :   tree op;
     681                 :             : 
     682                 :           0 :   if (TREE_CODE (t) != ADDR_EXPR)
     683                 :             :     return false;
     684                 :             : 
     685                 :           0 :   op = TREE_OPERAND (t, 0);
     686                 :           0 :   while (handled_component_p (op))
     687                 :             :     {
     688                 :           0 :       if ((TREE_CODE (op) == ARRAY_REF
     689                 :           0 :            || TREE_CODE (op) == ARRAY_RANGE_REF)
     690                 :           0 :           && !is_gimple_val (TREE_OPERAND (op, 1)))
     691                 :             :             return false;
     692                 :             : 
     693                 :           0 :       op = TREE_OPERAND (op, 0);
     694                 :             :     }
     695                 :             : 
     696                 :           0 :   if (CONSTANT_CLASS_P (op)
     697                 :           0 :       || TREE_CODE (op) == TARGET_MEM_REF
     698                 :           0 :       || TREE_CODE (op) == MEM_REF)
     699                 :             :     return true;
     700                 :             : 
     701                 :           0 :   switch (TREE_CODE (op))
     702                 :             :     {
     703                 :             :     case PARM_DECL:
     704                 :             :     case RESULT_DECL:
     705                 :             :     case LABEL_DECL:
     706                 :             :     case FUNCTION_DECL:
     707                 :             :     case VAR_DECL:
     708                 :             :     case CONST_DECL:
     709                 :             :       return true;
     710                 :             : 
     711                 :             :     default:
     712                 :             :       return false;
     713                 :             :     }
     714                 :             : }
     715                 :             : 
     716                 :             : /* Return true if T is a gimple invariant address.  */
     717                 :             : 
     718                 :             : bool
     719                 :  4952290801 : is_gimple_invariant_address (const_tree t)
     720                 :             : {
     721                 :  4952290801 :   const_tree op;
     722                 :             : 
     723                 :  4952290801 :   if (TREE_CODE (t) != ADDR_EXPR)
     724                 :             :     return false;
     725                 :             : 
     726                 :  4952290801 :   op = strip_invariant_refs (TREE_OPERAND (t, 0));
     727                 :  4952290801 :   if (!op)
     728                 :             :     return false;
     729                 :             : 
     730                 :  4941520646 :   if (TREE_CODE (op) == MEM_REF)
     731                 :             :     {
     732                 :   376710587 :       const_tree op0 = TREE_OPERAND (op, 0);
     733                 :   376710587 :       return (TREE_CODE (op0) == ADDR_EXPR
     734                 :   376710587 :               && (CONSTANT_CLASS_P (TREE_OPERAND (op0, 0))
     735                 :   131758489 :                   || decl_address_invariant_p (TREE_OPERAND (op0, 0))));
     736                 :             :     }
     737                 :             : 
     738                 :  4564810059 :   return CONSTANT_CLASS_P (op) || decl_address_invariant_p (op);
     739                 :             : }
     740                 :             : 
     741                 :             : /* Return true if T is a gimple invariant address at IPA level
     742                 :             :    (so addresses of variables on stack are not allowed).  */
     743                 :             : 
     744                 :             : bool
     745                 :     2053353 : is_gimple_ip_invariant_address (const_tree t)
     746                 :             : {
     747                 :     2053353 :   const_tree op;
     748                 :             : 
     749                 :     2053353 :   if (TREE_CODE (t) != ADDR_EXPR)
     750                 :             :     return false;
     751                 :             : 
     752                 :     2053353 :   op = strip_invariant_refs (TREE_OPERAND (t, 0));
     753                 :     2053353 :   if (!op)
     754                 :             :     return false;
     755                 :             : 
     756                 :     2052089 :   if (TREE_CODE (op) == MEM_REF)
     757                 :             :     {
     758                 :       75805 :       const_tree op0 = TREE_OPERAND (op, 0);
     759                 :       75805 :       return (TREE_CODE (op0) == ADDR_EXPR
     760                 :       75805 :               && (CONSTANT_CLASS_P (TREE_OPERAND (op0, 0))
     761                 :       55873 :                   || decl_address_ip_invariant_p (TREE_OPERAND (op0, 0))));
     762                 :             :     }
     763                 :             : 
     764                 :     1976284 :   return CONSTANT_CLASS_P (op) || decl_address_ip_invariant_p (op);
     765                 :             : }
     766                 :             : 
     767                 :             : /* Return true if T is a GIMPLE minimal invariant.  It's a restricted
     768                 :             :    form of function invariant.  */
     769                 :             : 
     770                 :             : bool
     771                 : 19615171852 : is_gimple_min_invariant (const_tree t)
     772                 :             : {
     773                 : 19615171852 :   if (TREE_CODE (t) == ADDR_EXPR)
     774                 :  4951150803 :     return is_gimple_invariant_address (t);
     775                 :             : 
     776                 : 14664021049 :   return is_gimple_constant (t);
     777                 :             : }
     778                 :             : 
     779                 :             : /* Return true if T is a GIMPLE interprocedural invariant.  It's a restricted
     780                 :             :    form of gimple minimal invariant.  */
     781                 :             : 
     782                 :             : bool
     783                 :    22885888 : is_gimple_ip_invariant (const_tree t)
     784                 :             : {
     785                 :    22885888 :   if (TREE_CODE (t) == ADDR_EXPR)
     786                 :     2052370 :     return is_gimple_ip_invariant_address (t);
     787                 :             : 
     788                 :    20833518 :   return is_gimple_constant (t);
     789                 :             : }
     790                 :             : 
     791                 :             : /* Return true if T is a non-aggregate register variable.  */
     792                 :             : 
     793                 :             : bool
     794                 : 39944395676 : is_gimple_reg (tree t)
     795                 :             : {
     796                 : 69872900482 :   if (virtual_operand_p (t))
     797                 :             :     return false;
     798                 :             : 
     799                 : 39620114096 :   if (TREE_CODE (t) == SSA_NAME)
     800                 :             :     return true;
     801                 :             : 
     802                 : 14729930295 :   if (!is_gimple_variable (t))
     803                 :             :     return false;
     804                 :             : 
     805                 :  5201990376 :   if (!is_gimple_reg_type (TREE_TYPE (t)))
     806                 :             :     return false;
     807                 :             : 
     808                 :             :   /* A volatile decl is not acceptable because we can't reuse it as
     809                 :             :      needed.  We need to copy it into a temp first.  */
     810                 :  2055961700 :   if (TREE_THIS_VOLATILE (t))
     811                 :             :     return false;
     812                 :             : 
     813                 :             :   /* We define "registers" as things that can be renamed as needed,
     814                 :             :      which with our infrastructure does not apply to memory.  */
     815                 :  1816114950 :   if (needs_to_live_in_memory (t))
     816                 :             :     return false;
     817                 :             : 
     818                 :             :   /* Hard register variables are an interesting case.  For those that
     819                 :             :      are call-clobbered, we don't know where all the calls are, since
     820                 :             :      we don't (want to) take into account which operations will turn
     821                 :             :      into libcalls at the rtl level.  For those that are call-saved,
     822                 :             :      we don't currently model the fact that calls may in fact change
     823                 :             :      global hard registers, nor do we examine ASM_CLOBBERS at the tree
     824                 :             :      level, and so miss variable changes that might imply.  All around,
     825                 :             :      it seems safest to not do too much optimization with these at the
     826                 :             :      tree level at all.  We'll have to rely on the rtl optimizers to
     827                 :             :      clean this up, as there we've got all the appropriate bits exposed.  */
     828                 :  1047601409 :   if (VAR_P (t) && DECL_HARD_REGISTER (t))
     829                 :             :     return false;
     830                 :             : 
     831                 :             :   /* Variables can be marked as having partial definitions, avoid
     832                 :             :      putting them into SSA form.  */
     833                 :  1046181970 :   return !DECL_NOT_GIMPLE_REG_P (t);
     834                 :             : }
     835                 :             : 
     836                 :             : 
     837                 :             : /* Return true if T is a GIMPLE rvalue, i.e. an identifier or a constant.  */
     838                 :             : 
     839                 :             : bool
     840                 :  8038936557 : is_gimple_val (tree t)
     841                 :             : {
     842                 :             :   /* Make loads from volatiles and memory vars explicit.  */
     843                 :  8038936557 :   if (is_gimple_variable (t)
     844                 :  4277207028 :       && is_gimple_reg_type (TREE_TYPE (t))
     845                 : 12294287109 :       && !is_gimple_reg (t))
     846                 :             :     return false;
     847                 :             : 
     848                 :  8029113849 :   return (is_gimple_variable (t) || is_gimple_min_invariant (t));
     849                 :             : }
     850                 :             : 
     851                 :             : /* Similarly, but accept hard registers as inputs to asm statements.  */
     852                 :             : 
     853                 :             : bool
     854                 :       49109 : is_gimple_asm_val (tree t)
     855                 :             : {
     856                 :       49109 :   if (VAR_P (t) && DECL_HARD_REGISTER (t))
     857                 :             :     return true;
     858                 :             : 
     859                 :       48247 :   return is_gimple_val (t);
     860                 :             : }
     861                 :             : 
     862                 :             : /* Return true if T is a GIMPLE minimal lvalue.  */
     863                 :             : 
     864                 :             : bool
     865                 :    27688361 : is_gimple_min_lval (tree t)
     866                 :             : {
     867                 :    27688361 :   if (!(t = CONST_CAST_TREE (strip_invariant_refs (t))))
     868                 :             :     return false;
     869                 :    27688346 :   return (is_gimple_id (t) || TREE_CODE (t) == MEM_REF);
     870                 :             : }
     871                 :             : 
     872                 :             : /* Return true if T is a valid function operand of a CALL_EXPR.  */
     873                 :             : 
     874                 :             : bool
     875                 :   949895782 : is_gimple_call_addr (tree t)
     876                 :             : {
     877                 :   949895782 :   return (TREE_CODE (t) == OBJ_TYPE_REF || is_gimple_val (t));
     878                 :             : }
     879                 :             : 
     880                 :             : /* Return true if T is a valid address operand of a MEM_REF.  */
     881                 :             : 
     882                 :             : bool
     883                 :  1243897887 : is_gimple_mem_ref_addr (tree t)
     884                 :             : {
     885                 :  1243897887 :   return (is_gimple_reg (t)
     886                 :   310239576 :           || TREE_CODE (t) == INTEGER_CST
     887                 :  1553797671 :           || (TREE_CODE (t) == ADDR_EXPR
     888                 :   308320049 :               && (CONSTANT_CLASS_P (TREE_OPERAND (t, 0))
     889                 :   306830769 :                   || decl_address_invariant_p (TREE_OPERAND (t, 0)))));
     890                 :             : }
     891                 :             : 
     892                 :             : /* Hold trees marked addressable during expand.  */
     893                 :             : 
     894                 :             : static hash_set<tree> *mark_addressable_queue;
     895                 :             : 
     896                 :             : /* Mark X as addressable or queue it up if called during expand.  We
     897                 :             :    don't want to apply it immediately during expand because decls are
     898                 :             :    made addressable at that point due to RTL-only concerns, such as
     899                 :             :    uses of memcpy for block moves, and TREE_ADDRESSABLE changes
     900                 :             :    is_gimple_reg, which might make it seem like a variable that used
     901                 :             :    to be a gimple_reg shouldn't have been an SSA name.  So we queue up
     902                 :             :    this flag setting and only apply it when we're done with GIMPLE and
     903                 :             :    only RTL issues matter.  */
     904                 :             : 
     905                 :             : static void
     906                 :     9753622 : mark_addressable_1 (tree x)
     907                 :             : {
     908                 :     9753622 :   if (!currently_expanding_to_rtl)
     909                 :             :     {
     910                 :     9735327 :       TREE_ADDRESSABLE (x) = 1;
     911                 :     9735327 :       return;
     912                 :             :     }
     913                 :             : 
     914                 :       18295 :   if (!mark_addressable_queue)
     915                 :        4920 :     mark_addressable_queue = new hash_set<tree>();
     916                 :       18295 :   mark_addressable_queue->add (x);
     917                 :             : }
     918                 :             : 
     919                 :             : /* Adaptor for mark_addressable_1 for use in hash_set traversal.  */
     920                 :             : 
     921                 :             : static bool
     922                 :        7321 : mark_addressable_2 (tree const &x, void * ATTRIBUTE_UNUSED = NULL)
     923                 :             : {
     924                 :        7321 :   mark_addressable_1 (x);
     925                 :        7321 :   return false;
     926                 :             : }
     927                 :             : 
     928                 :             : /* Mark all queued trees as addressable, and empty the queue.  To be
     929                 :             :    called right after clearing CURRENTLY_EXPANDING_TO_RTL.  */
     930                 :             : 
     931                 :             : void
     932                 :     1427373 : flush_mark_addressable_queue ()
     933                 :             : {
     934                 :     1427373 :   gcc_assert (!currently_expanding_to_rtl);
     935                 :     1427373 :   if (mark_addressable_queue)
     936                 :             :     {
     937                 :        4920 :       mark_addressable_queue->traverse<void*, mark_addressable_2> (NULL);
     938                 :        9840 :       delete mark_addressable_queue;
     939                 :        4920 :       mark_addressable_queue = NULL;
     940                 :             :     }
     941                 :     1427373 : }
     942                 :             : 
     943                 :             : /* Mark X addressable.  Unlike the langhook we expect X to be in gimple
     944                 :             :    form and we don't do any syntax checking.  */
     945                 :             : 
     946                 :             : void
     947                 :    30201972 : mark_addressable (tree x)
     948                 :             : {
     949                 :    30201972 :   if (TREE_CODE (x) == WITH_SIZE_EXPR)
     950                 :           0 :     x = TREE_OPERAND (x, 0);
     951                 :    35007155 :   while (handled_component_p (x))
     952                 :     4805183 :     x = TREE_OPERAND (x, 0);
     953                 :    30201972 :   if ((TREE_CODE (x) == MEM_REF
     954                 :    30201972 :        || TREE_CODE (x) == TARGET_MEM_REF)
     955                 :    30201972 :       && TREE_CODE (TREE_OPERAND (x, 0)) == ADDR_EXPR)
     956                 :       10086 :     x = TREE_OPERAND (TREE_OPERAND (x, 0), 0);
     957                 :    30201972 :   if (!VAR_P (x)
     958                 :             :       && TREE_CODE (x) != PARM_DECL
     959                 :             :       && TREE_CODE (x) != RESULT_DECL)
     960                 :             :     return;
     961                 :     9745405 :   mark_addressable_1 (x);
     962                 :             : 
     963                 :             :   /* Also mark the artificial SSA_NAME that points to the partition of X.  */
     964                 :     9745405 :   if (VAR_P (x)
     965                 :     9322762 :       && !DECL_EXTERNAL (x)
     966                 :     8180109 :       && !TREE_STATIC (x)
     967                 :     4990450 :       && cfun->gimple_df != NULL
     968                 :    14735855 :       && cfun->gimple_df->decls_to_pointers != NULL)
     969                 :             :     {
     970                 :        1687 :       tree *namep = cfun->gimple_df->decls_to_pointers->get (x);
     971                 :        1687 :       if (namep)
     972                 :         896 :         mark_addressable_1 (*namep);
     973                 :             :     }
     974                 :             : }
     975                 :             : 
     976                 :             : /* Returns true iff T is a valid RHS for an assignment to a renamed
     977                 :             :    user -- or front-end generated artificial -- variable.  */
     978                 :             : 
     979                 :             : bool
     980                 :      709533 : is_gimple_reg_rhs (tree t)
     981                 :             : {
     982                 :      709533 :   return get_gimple_rhs_class (TREE_CODE (t)) != GIMPLE_INVALID_RHS;
     983                 :             : }
     984                 :             : 
     985                 :             : #include "gt-gimple-expr.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.