LCOV - code coverage report
Current view: top level - gcc - gimple-expr.cc (source / functions) Coverage Total Hit
Test: gcc.info Lines: 93.4 % 378 353
Test Date: 2025-02-01 13:18:56 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) 2007-2025 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                 : 11148791828 : useless_type_conversion_p (tree outer_type, tree inner_type)
      69                 :             : {
      70                 :             :   /* Do the following before stripping toplevel qualifiers.  */
      71                 : 11149252291 :   if (POINTER_TYPE_P (inner_type)
      72                 :  2770094960 :       && POINTER_TYPE_P (outer_type))
      73                 :             :     {
      74                 :             :       /* Do not lose casts between pointers to different address spaces.  */
      75                 :  2744512419 :       if (TYPE_ADDR_SPACE (TREE_TYPE (outer_type))
      76                 :  2744512419 :           != TYPE_ADDR_SPACE (TREE_TYPE (inner_type)))
      77                 :             :         return false;
      78                 :             :       /* Do not lose casts to function pointer types.  */
      79                 :  5417211459 :       if (FUNC_OR_METHOD_TYPE_P (TREE_TYPE (outer_type))
      80                 :  2751001567 :           && !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                 : 11147871965 :   inner_type = TYPE_MAIN_VARIANT (inner_type);
      86                 : 11147871965 :   outer_type = TYPE_MAIN_VARIANT (outer_type);
      87                 :             : 
      88                 : 11147871965 :   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                 :   960097363 :   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                 :   853392617 :   if (INTEGRAL_TYPE_P (inner_type)
     100                 :   155817548 :       && INTEGRAL_TYPE_P (outer_type))
     101                 :             :     {
     102                 :             :       /* Preserve changes in signedness or precision.  */
     103                 :   144882511 :       if (TYPE_UNSIGNED (inner_type) != TYPE_UNSIGNED (outer_type)
     104                 :   144882511 :           || 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                 :    56051367 :       if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
     110                 :    56051367 :            != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
     111                 :    56051367 :           && 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                 :    56009789 :       if ((TREE_CODE (inner_type) == BITINT_TYPE)
     120                 :    56009789 :           != (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                 :   708510106 :   else if (SCALAR_FLOAT_TYPE_P (inner_type)
     131                 :      549164 :            && SCALAR_FLOAT_TYPE_P (outer_type))
     132                 :             :     return true;
     133                 :             : 
     134                 :             :   /* Fixed point types with the same mode are compatible.  */
     135                 :   707963951 :   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                 :   707963951 :   else if (POINTER_TYPE_P (inner_type)
     141                 :   682862212 :            && 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                 :    42875114 :   else if (TREE_CODE (inner_type) == COMPLEX_TYPE
     152                 :       33820 :            && TREE_CODE (outer_type) == COMPLEX_TYPE)
     153                 :       33014 :     return useless_type_conversion_p (TREE_TYPE (outer_type),
     154                 :       66028 :                                       TREE_TYPE (inner_type));
     155                 :             : 
     156                 :             :   /* Recurse for vector types with the same number of subparts.  */
     157                 :    42842100 :   else if (VECTOR_TYPE_P (inner_type)
     158                 :     9512947 :            && VECTOR_TYPE_P (outer_type))
     159                 :    18970396 :     return (known_eq (TYPE_VECTOR_SUBPARTS (inner_type),
     160                 :             :                       TYPE_VECTOR_SUBPARTS (outer_type))
     161                 :     9479360 :             && useless_type_conversion_p (TREE_TYPE (outer_type),
     162                 :     9479360 :                                           TREE_TYPE (inner_type))
     163                 :    18761469 :             && targetm.compatible_vector_types_p (inner_type, outer_type));
     164                 :             : 
     165                 :    33356902 :   else if (TREE_CODE (inner_type) == ARRAY_TYPE
     166                 :      734889 :            && TREE_CODE (outer_type) == ARRAY_TYPE)
     167                 :             :     {
     168                 :             :       /* Preserve various attributes.  */
     169                 :      593446 :       if (TYPE_REVERSE_STORAGE_ORDER (inner_type)
     170                 :      593446 :           != TYPE_REVERSE_STORAGE_ORDER (outer_type))
     171                 :             :         return false;
     172                 :      593446 :       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                 :      559729 :       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                 :      557293 :       if (TYPE_SIZE (outer_type)
     183                 :      541825 :           && TREE_CODE (TYPE_SIZE (outer_type)) == INTEGER_CST
     184                 :     1080368 :           && (!TYPE_SIZE (inner_type)
     185                 :      521377 :               || TREE_CODE (TYPE_SIZE (inner_type)) != INTEGER_CST
     186                 :      519607 :               || !tree_int_cst_equal (TYPE_SIZE (outer_type),
     187                 :      519607 :                                       TYPE_SIZE (inner_type))))
     188                 :       42158 :         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                 :      515135 :       if (TYPE_DOMAIN (inner_type)
     196                 :      515133 :           && TYPE_DOMAIN (outer_type)
     197                 :     1030246 :           && TYPE_DOMAIN (inner_type) != TYPE_DOMAIN (outer_type))
     198                 :             :         {
     199                 :      115645 :           tree inner_min = TYPE_MIN_VALUE (TYPE_DOMAIN (inner_type));
     200                 :      115645 :           tree outer_min = TYPE_MIN_VALUE (TYPE_DOMAIN (outer_type));
     201                 :      115645 :           tree inner_max = TYPE_MAX_VALUE (TYPE_DOMAIN (inner_type));
     202                 :      115645 :           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                 :      115645 :           if (inner_min && TREE_CODE (inner_min) != INTEGER_CST)
     208                 :           0 :             inner_min = NULL_TREE;
     209                 :      115645 :           if (outer_min && TREE_CODE (outer_min) != INTEGER_CST)
     210                 :           0 :             outer_min = NULL_TREE;
     211                 :      115645 :           if (inner_max && TREE_CODE (inner_max) != INTEGER_CST)
     212                 :       17042 :             inner_max = NULL_TREE;
     213                 :      115645 :           if (outer_max && TREE_CODE (outer_max) != INTEGER_CST)
     214                 :       21410 :             outer_max = NULL_TREE;
     215                 :             : 
     216                 :             :           /* Conversions NULL / variable <- cst are useless, but not
     217                 :             :              the other way around.  */
     218                 :      115645 :           if (outer_min
     219                 :      115645 :               && (!inner_min
     220                 :      115645 :                   || !tree_int_cst_equal (inner_min, outer_min)))
     221                 :        7981 :             return false;
     222                 :      107664 :           if (outer_max
     223                 :      107664 :               && (!inner_max
     224                 :       86242 :                   || !tree_int_cst_equal (inner_max, outer_max)))
     225                 :       79705 :             return false;
     226                 :             :         }
     227                 :             : 
     228                 :             :       /* Recurse on the element check.  */
     229                 :      427449 :       return useless_type_conversion_p (TREE_TYPE (outer_type),
     230                 :      854898 :                                         TREE_TYPE (inner_type));
     231                 :             :     }
     232                 :             : 
     233                 :    32763456 :   else if (FUNC_OR_METHOD_TYPE_P (inner_type)
     234                 :      311564 :            && TREE_CODE (inner_type) == TREE_CODE (outer_type))
     235                 :             :     {
     236                 :      306450 :       tree outer_parm, inner_parm;
     237                 :             : 
     238                 :             :       /* If the return types are not compatible bail out.  */
     239                 :      306450 :       if (!useless_type_conversion_p (TREE_TYPE (outer_type),
     240                 :      306450 :                                       TREE_TYPE (inner_type)))
     241                 :             :         return false;
     242                 :             : 
     243                 :             :       /* Method types should belong to a compatible base class.  */
     244                 :      296393 :       if (TREE_CODE (inner_type) == METHOD_TYPE
     245                 :      304993 :           && !useless_type_conversion_p (TYPE_METHOD_BASETYPE (outer_type),
     246                 :        8600 :                                          TYPE_METHOD_BASETYPE (inner_type)))
     247                 :             :         return false;
     248                 :             : 
     249                 :             :       /* A conversion to an unprototyped argument list is ok.  */
     250                 :      293285 :       if (!prototype_p (outer_type))
     251                 :             :         return true;
     252                 :             : 
     253                 :             :       /* If the unqualified argument types are compatible the conversion
     254                 :             :          is useless.  */
     255                 :      293191 :       if (TYPE_ARG_TYPES (outer_type) == TYPE_ARG_TYPES (inner_type))
     256                 :             :         return true;
     257                 :             : 
     258                 :      288981 :       for (outer_parm = TYPE_ARG_TYPES (outer_type),
     259                 :      288981 :            inner_parm = TYPE_ARG_TYPES (inner_type);
     260                 :     1214144 :            outer_parm && inner_parm;
     261                 :      925163 :            outer_parm = TREE_CHAIN (outer_parm),
     262                 :      925163 :            inner_parm = TREE_CHAIN (inner_parm))
     263                 :     1856234 :         if (!useless_type_conversion_p
     264                 :      928117 :                (TYPE_MAIN_VARIANT (TREE_VALUE (outer_parm)),
     265                 :      928117 :                 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                 :      286027 :       if (outer_parm || inner_parm)
     271                 :             :         return false;
     272                 :             : 
     273                 :             :       /* Defer to the target if necessary.  */
     274                 :      284495 :       if (TYPE_ATTRIBUTES (inner_type) || TYPE_ATTRIBUTES (outer_type))
     275                 :      273996 :         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                 :    32457006 :   else if (AGGREGATE_TYPE_P (inner_type)
     284                 :     3699509 :            && TREE_CODE (inner_type) == TREE_CODE (outer_type))
     285                 :     2692543 :     return TYPE_CANONICAL (inner_type)
     286                 :     2692543 :            && TYPE_CANONICAL (inner_type) == TYPE_CANONICAL (outer_type);
     287                 :             : 
     288                 :    29764463 :   else if (TREE_CODE (inner_type) == OFFSET_TYPE
     289                 :       12387 :            && TREE_CODE (outer_type) == OFFSET_TYPE)
     290                 :        2344 :     return useless_type_conversion_p (TREE_TYPE (outer_type),
     291                 :        2344 :                                       TREE_TYPE (inner_type))
     292                 :        4499 :            && useless_type_conversion_p
     293                 :        2155 :                 (TYPE_OFFSET_BASETYPE (outer_type),
     294                 :        2155 :                  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                 :   102964127 : gimple_set_body (tree fndecl, gimple_seq seq)
     306                 :             : {
     307                 :   102964127 :   struct function *fn = DECL_STRUCT_FUNCTION (fndecl);
     308                 :   102964127 :   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                 :          62 :       gcc_assert (seq == NULL);
     314                 :             :     }
     315                 :             :   else
     316                 :   102964065 :     fn->gimple_body = seq;
     317                 :   102964127 : }
     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                 :   446607962 : gimple_body (tree fndecl)
     327                 :             : {
     328                 :   446607962 :   struct function *fn = DECL_STRUCT_FUNCTION (fndecl);
     329                 :   446607962 :   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                 :   415652526 : gimple_has_body_p (tree fndecl)
     336                 :             : {
     337                 :   415652526 :   struct function *fn = DECL_STRUCT_FUNCTION (fndecl);
     338                 :   415652526 :   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                 :       30540 : gimple_decl_printable_name (tree decl, int verbosity)
     345                 :             : {
     346                 :       30540 :   if (!DECL_NAME (decl))
     347                 :             :     return NULL;
     348                 :             : 
     349                 :       30540 :   if (HAS_DECL_ASSEMBLER_NAME_P (decl) && DECL_ASSEMBLER_NAME_SET_P (decl))
     350                 :             :     {
     351                 :       30169 :       int dmgl_opts = DMGL_NO_OPTS;
     352                 :             : 
     353                 :       30169 :       if (verbosity >= 2)
     354                 :             :         {
     355                 :        4582 :           dmgl_opts = DMGL_VERBOSE
     356                 :             :                       | DMGL_ANSI
     357                 :             :                       | DMGL_GNU_V3
     358                 :             :                       | DMGL_RET_POSTFIX;
     359                 :        4582 :           if (TREE_CODE (decl) == FUNCTION_DECL)
     360                 :        4509 :             dmgl_opts |= DMGL_PARAMS;
     361                 :             :         }
     362                 :             : 
     363                 :       30169 :       const char *mangled_str
     364                 :       30169 :         = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME_RAW (decl));
     365                 :       30169 :       const char *str = cplus_demangle_v3 (mangled_str, dmgl_opts);
     366                 :       59005 :       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                 :     1479014 : copy_var_decl (tree var, tree name, tree type)
     377                 :             : {
     378                 :     1479014 :   tree copy = build_decl (DECL_SOURCE_LOCATION (var), VAR_DECL, name, type);
     379                 :             : 
     380                 :     1479014 :   TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (var);
     381                 :     1479014 :   TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (var);
     382                 :     1479014 :   DECL_NOT_GIMPLE_REG_P (copy) = DECL_NOT_GIMPLE_REG_P (var);
     383                 :     1479014 :   DECL_ARTIFICIAL (copy) = DECL_ARTIFICIAL (var);
     384                 :     1479014 :   DECL_IGNORED_P (copy) = DECL_IGNORED_P (var);
     385                 :     1479014 :   DECL_CONTEXT (copy) = DECL_CONTEXT (var);
     386                 :     1479014 :   TREE_USED (copy) = 1;
     387                 :     1479014 :   DECL_SEEN_IN_BIND_EXPR_P (copy) = 1;
     388                 :     1479014 :   DECL_ATTRIBUTES (copy) = DECL_ATTRIBUTES (var);
     389                 :     1479014 :   if (DECL_USER_ALIGN (var))
     390                 :             :     {
     391                 :          48 :       SET_DECL_ALIGN (copy, DECL_ALIGN (var));
     392                 :          48 :       DECL_USER_ALIGN (copy) = 1;
     393                 :             :     }
     394                 :             : 
     395                 :     1479014 :   copy_warning (copy, var);
     396                 :     1479014 :   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                 :    23083094 : remove_suffix (char *name, int len)
     406                 :             : {
     407                 :    23083094 :   int i;
     408                 :             : 
     409                 :    85674859 :   for (i = 2; i < 7 && len > i; i++)
     410                 :    63729490 :     if (name[len - i] == '.')
     411                 :             :       {
     412                 :     1137725 :         name[len - i] = '\0';
     413                 :     1137725 :         break;
     414                 :             :       }
     415                 :    23083094 : }
     416                 :             : 
     417                 :             : /* Create a new temporary name with PREFIX.  Return an identifier.  */
     418                 :             : 
     419                 :             : static GTY(()) unsigned int tmp_var_id_num;
     420                 :             : 
     421                 :             : tree
     422                 :    23083094 : create_tmp_var_name (const char *prefix)
     423                 :             : {
     424                 :    23083094 :   char *tmp_name;
     425                 :             : 
     426                 :    23083094 :   if (prefix)
     427                 :             :     {
     428                 :    23083094 :       char *preftmp = ASTRDUP (prefix);
     429                 :             : 
     430                 :    23083094 :       remove_suffix (preftmp, strlen (preftmp));
     431                 :    23083094 :       prefix = preftmp;
     432                 :             :     }
     433                 :             : 
     434                 :    23083094 :   ASM_FORMAT_PRIVATE_NAME (tmp_name, prefix ? prefix : "T", tmp_var_id_num++);
     435                 :    23083094 :   return get_identifier (tmp_name);
     436                 :             : }
     437                 :             : 
     438                 :             : /* Create a new temporary variable declaration of type TYPE.
     439                 :             :    Do NOT push it into the current binding.  */
     440                 :             : 
     441                 :             : tree
     442                 :    25908441 : create_tmp_var_raw (tree type, const char *prefix)
     443                 :             : {
     444                 :    25908441 :   tree tmp_var;
     445                 :             : 
     446                 :    45437069 :   tmp_var = build_decl (input_location,
     447                 :    19528628 :                         VAR_DECL, prefix ? create_tmp_var_name (prefix) : NULL,
     448                 :             :                         type);
     449                 :             : 
     450                 :             :   /* The variable was declared by the compiler.  */
     451                 :    25908441 :   DECL_ARTIFICIAL (tmp_var) = 1;
     452                 :             :   /* And we don't want debug info for it.  */
     453                 :    25908441 :   DECL_IGNORED_P (tmp_var) = 1;
     454                 :             :   /* And we don't want even the fancy names of those printed in
     455                 :             :      -fdump-final-insns= dumps.  */
     456                 :    25908441 :   DECL_NAMELESS (tmp_var) = 1;
     457                 :             : 
     458                 :             :   /* Make the variable writable.  */
     459                 :    25908441 :   TREE_READONLY (tmp_var) = 0;
     460                 :             : 
     461                 :    25908441 :   DECL_EXTERNAL (tmp_var) = 0;
     462                 :    25908441 :   TREE_STATIC (tmp_var) = 0;
     463                 :    25908441 :   TREE_USED (tmp_var) = 1;
     464                 :             : 
     465                 :    25908441 :   return tmp_var;
     466                 :             : }
     467                 :             : 
     468                 :             : /* Create a new temporary variable declaration of type TYPE.  DO push the
     469                 :             :    variable into the current binding.  Further, assume that this is called
     470                 :             :    only from gimplification or optimization, at which point the creation of
     471                 :             :    certain types are bugs.  */
     472                 :             : 
     473                 :             : tree
     474                 :    14908414 : create_tmp_var (tree type, const char *prefix)
     475                 :             : {
     476                 :    14908414 :   tree tmp_var;
     477                 :             : 
     478                 :             :   /* We don't allow types that are addressable (meaning we can't make copies),
     479                 :             :      or incomplete.  We also used to reject every variable size objects here,
     480                 :             :      but now support those for which a constant upper bound can be obtained.
     481                 :             :      The processing for variable sizes is performed in gimple_add_tmp_var,
     482                 :             :      point at which it really matters and possibly reached via paths not going
     483                 :             :      through this function, e.g. after direct calls to create_tmp_var_raw.  */
     484                 :    14908414 :   gcc_assert (!TREE_ADDRESSABLE (type) && COMPLETE_TYPE_P (type));
     485                 :             : 
     486                 :    14908414 :   tmp_var = create_tmp_var_raw (type, prefix);
     487                 :    14908414 :   gimple_add_tmp_var (tmp_var);
     488                 :    14908414 :   return tmp_var;
     489                 :             : }
     490                 :             : 
     491                 :             : /* Create a new temporary variable declaration of type TYPE by calling
     492                 :             :    create_tmp_var and if TYPE is a vector or a complex number, mark the new
     493                 :             :    temporary as gimple register.  */
     494                 :             : 
     495                 :             : tree
     496                 :     3344810 : create_tmp_reg (tree type, const char *prefix)
     497                 :             : {
     498                 :     3344810 :   return create_tmp_var (type, prefix);
     499                 :             : }
     500                 :             : 
     501                 :             : /* Create a new temporary variable declaration of type TYPE by calling
     502                 :             :    create_tmp_var and if TYPE is a vector or a complex number, mark the new
     503                 :             :    temporary as gimple register.  */
     504                 :             : 
     505                 :             : tree
     506                 :       22328 : create_tmp_reg_fn (struct function *fn, tree type, const char *prefix)
     507                 :             : {
     508                 :       22328 :   tree tmp;
     509                 :             : 
     510                 :       22328 :   tmp = create_tmp_var_raw (type, prefix);
     511                 :       22328 :   gimple_add_tmp_var_fn (fn, tmp);
     512                 :             : 
     513                 :       22328 :   return tmp;
     514                 :             : }
     515                 :             : 
     516                 :             : 
     517                 :             : /* ----- Expression related -----  */
     518                 :             : 
     519                 :             : /* Extract the operands and code for expression EXPR into *SUBCODE_P,
     520                 :             :    *OP1_P, *OP2_P and *OP3_P respectively.  */
     521                 :             : 
     522                 :             : void
     523                 :   163267290 : extract_ops_from_tree (tree expr, enum tree_code *subcode_p, tree *op1_p,
     524                 :             :                        tree *op2_p, tree *op3_p)
     525                 :             : {
     526                 :   163267290 :   *subcode_p = TREE_CODE (expr);
     527                 :   163267290 :   switch (get_gimple_rhs_class (*subcode_p))
     528                 :             :     {
     529                 :      101518 :     case GIMPLE_TERNARY_RHS:
     530                 :      101518 :       {
     531                 :      101518 :         *op1_p = TREE_OPERAND (expr, 0);
     532                 :      101518 :         *op2_p = TREE_OPERAND (expr, 1);
     533                 :      101518 :         *op3_p = TREE_OPERAND (expr, 2);
     534                 :      101518 :         break;
     535                 :             :       }
     536                 :    19859262 :     case GIMPLE_BINARY_RHS:
     537                 :    19859262 :       {
     538                 :    19859262 :         *op1_p = TREE_OPERAND (expr, 0);
     539                 :    19859262 :         *op2_p = TREE_OPERAND (expr, 1);
     540                 :    19859262 :         *op3_p = NULL_TREE;
     541                 :    19859262 :         break;
     542                 :             :       }
     543                 :    11116865 :     case GIMPLE_UNARY_RHS:
     544                 :    11116865 :       {
     545                 :    11116865 :         *op1_p = TREE_OPERAND (expr, 0);
     546                 :    11116865 :         *op2_p = NULL_TREE;
     547                 :    11116865 :         *op3_p = NULL_TREE;
     548                 :    11116865 :         break;
     549                 :             :       }
     550                 :   132189645 :     case GIMPLE_SINGLE_RHS:
     551                 :   132189645 :       {
     552                 :   132189645 :         *op1_p = expr;
     553                 :   132189645 :         *op2_p = NULL_TREE;
     554                 :   132189645 :         *op3_p = NULL_TREE;
     555                 :   132189645 :         break;
     556                 :             :       }
     557                 :           0 :     default:
     558                 :           0 :       gcc_unreachable ();
     559                 :             :     }
     560                 :   163267290 : }
     561                 :             : 
     562                 :             : /* Extract operands for a GIMPLE_COND statement out of COND_EXPR tree COND.  */
     563                 :             : 
     564                 :             : void
     565                 :     5686910 : gimple_cond_get_ops_from_tree (tree cond, enum tree_code *code_p,
     566                 :             :                                tree *lhs_p, tree *rhs_p)
     567                 :             : {
     568                 :     5686910 :   gcc_assert (COMPARISON_CLASS_P (cond)
     569                 :             :               || TREE_CODE (cond) == TRUTH_NOT_EXPR
     570                 :             :               || is_gimple_min_invariant (cond)
     571                 :             :               || SSA_VAR_P (cond));
     572                 :     5686910 :   gcc_checking_assert (!tree_could_throw_p (cond));
     573                 :             : 
     574                 :     5686910 :   extract_ops_from_tree (cond, code_p, lhs_p, rhs_p);
     575                 :             : 
     576                 :             :   /* Canonicalize conditionals of the form 'if (!VAL)'.  */
     577                 :     5686910 :   if (*code_p == TRUTH_NOT_EXPR)
     578                 :             :     {
     579                 :           0 :       *code_p = EQ_EXPR;
     580                 :           0 :       gcc_assert (*lhs_p && *rhs_p == NULL_TREE);
     581                 :           0 :       *rhs_p = build_zero_cst (TREE_TYPE (*lhs_p));
     582                 :             :     }
     583                 :             :   /* Canonicalize conditionals of the form 'if (VAL)'  */
     584                 :     5686910 :   else if (TREE_CODE_CLASS (*code_p) != tcc_comparison)
     585                 :             :     {
     586                 :     1659003 :       *code_p = NE_EXPR;
     587                 :     1659003 :       gcc_assert (*lhs_p && *rhs_p == NULL_TREE);
     588                 :     1659003 :       *rhs_p = build_zero_cst (TREE_TYPE (*lhs_p));
     589                 :             :     }
     590                 :     5686910 : }
     591                 :             : 
     592                 :             : /*  Return true if T is a valid LHS for a GIMPLE assignment expression.  */
     593                 :             : 
     594                 :             : bool
     595                 :   239737722 : is_gimple_lvalue (tree t)
     596                 :             : {
     597                 :   239737722 :   return (is_gimple_addressable (t)
     598                 :    12512587 :           || TREE_CODE (t) == WITH_SIZE_EXPR
     599                 :             :           /* These are complex lvalues, but don't have addresses, so they
     600                 :             :              go here.  */
     601                 :   252226608 :           || TREE_CODE (t) == BIT_FIELD_REF);
     602                 :             : }
     603                 :             : 
     604                 :             : /* Helper for is_gimple_condexpr and is_gimple_condexpr_for_cond.  */
     605                 :             : 
     606                 :             : static bool
     607                 :     9308861 : is_gimple_condexpr_1 (tree t, bool allow_traps, bool allow_cplx)
     608                 :             : {
     609                 :     9308861 :   tree op0;
     610                 :     9308861 :   return (is_gimple_val (t)
     611                 :     9308861 :           || (COMPARISON_CLASS_P (t)
     612                 :     6416630 :               && (allow_traps || !tree_could_throw_p (t))
     613                 :     6409889 :               && ((op0 = TREE_OPERAND (t, 0)), true)
     614                 :     6409889 :               && (allow_cplx || TREE_CODE (TREE_TYPE (op0)) != COMPLEX_TYPE)
     615                 :     6409889 :               && is_gimple_val (op0)
     616                 :     5022831 :               && is_gimple_val (TREE_OPERAND (t, 1))));
     617                 :             : }
     618                 :             : 
     619                 :             : /* Like is_gimple_condexpr, but does not allow T to trap.  */
     620                 :             : 
     621                 :             : bool
     622                 :     6102196 : is_gimple_condexpr_for_cond (tree t)
     623                 :             : {
     624                 :     6102196 :   return is_gimple_condexpr_1 (t, false, true);
     625                 :             : }
     626                 :             : 
     627                 :             : /* Canonicalize a tree T for use in a COND_EXPR as conditional.  Returns
     628                 :             :    a canonicalized tree that is valid for a COND_EXPR or NULL_TREE, if
     629                 :             :    we failed to create one.  */
     630                 :             : 
     631                 :             : tree
     632                 :     3206665 : canonicalize_cond_expr_cond (tree t)
     633                 :             : {
     634                 :             :   /* Strip conversions around boolean operations.  */
     635                 :     3067324 :   if (CONVERT_EXPR_P (t)
     636                 :     3206665 :       && (truth_value_p (TREE_CODE (TREE_OPERAND (t, 0)))
     637                 :      138312 :           || TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0)))
     638                 :             :              == BOOLEAN_TYPE))
     639                 :        1029 :     t = TREE_OPERAND (t, 0);
     640                 :             : 
     641                 :             :   /* For !x use x == 0.  */
     642                 :     3206665 :   if (TREE_CODE (t) == TRUTH_NOT_EXPR)
     643                 :             :     {
     644                 :       26941 :       tree top0 = TREE_OPERAND (t, 0);
     645                 :       26941 :       t = build2 (EQ_EXPR, TREE_TYPE (t),
     646                 :       26941 :                   top0, build_int_cst (TREE_TYPE (top0), 0));
     647                 :             :     }
     648                 :             :   /* For cmp ? 1 : 0 use cmp.  */
     649                 :     3179724 :   else if (TREE_CODE (t) == COND_EXPR
     650                 :       77366 :            && COMPARISON_CLASS_P (TREE_OPERAND (t, 0))
     651                 :       75733 :            && integer_onep (TREE_OPERAND (t, 1))
     652                 :     3255457 :            && integer_zerop (TREE_OPERAND (t, 2)))
     653                 :             :     {
     654                 :       75733 :       tree top0 = TREE_OPERAND (t, 0);
     655                 :       75733 :       t = build2 (TREE_CODE (top0), TREE_TYPE (t),
     656                 :       75733 :                   TREE_OPERAND (top0, 0), TREE_OPERAND (top0, 1));
     657                 :             :     }
     658                 :             :   /* For x ^ y use x != y.  */
     659                 :     3103991 :   else if (TREE_CODE (t) == BIT_XOR_EXPR)
     660                 :           0 :     t = build2 (NE_EXPR, TREE_TYPE (t),
     661                 :           0 :                 TREE_OPERAND (t, 0), TREE_OPERAND (t, 1));
     662                 :             : 
     663                 :             :   /* We don't know where this will be used so allow both traps and
     664                 :             :      _Complex.  The caller is responsible for more precise checking.  */
     665                 :     3206665 :   if (is_gimple_condexpr_1 (t, true, true))
     666                 :     1103680 :     return t;
     667                 :             : 
     668                 :             :   return NULL_TREE;
     669                 :             : }
     670                 :             : 
     671                 :             : /* Return true if T is a gimple address.  */
     672                 :             : 
     673                 :             : bool
     674                 :           0 : is_gimple_address (const_tree t)
     675                 :             : {
     676                 :           0 :   tree op;
     677                 :             : 
     678                 :           0 :   if (TREE_CODE (t) != ADDR_EXPR)
     679                 :             :     return false;
     680                 :             : 
     681                 :           0 :   op = TREE_OPERAND (t, 0);
     682                 :           0 :   while (handled_component_p (op))
     683                 :             :     {
     684                 :           0 :       if ((TREE_CODE (op) == ARRAY_REF
     685                 :           0 :            || TREE_CODE (op) == ARRAY_RANGE_REF)
     686                 :           0 :           && !is_gimple_val (TREE_OPERAND (op, 1)))
     687                 :             :             return false;
     688                 :             : 
     689                 :           0 :       op = TREE_OPERAND (op, 0);
     690                 :             :     }
     691                 :             : 
     692                 :           0 :   if (CONSTANT_CLASS_P (op)
     693                 :           0 :       || TREE_CODE (op) == TARGET_MEM_REF
     694                 :           0 :       || TREE_CODE (op) == MEM_REF)
     695                 :             :     return true;
     696                 :             : 
     697                 :           0 :   switch (TREE_CODE (op))
     698                 :             :     {
     699                 :             :     case PARM_DECL:
     700                 :             :     case RESULT_DECL:
     701                 :             :     case LABEL_DECL:
     702                 :             :     case FUNCTION_DECL:
     703                 :             :     case VAR_DECL:
     704                 :             :     case CONST_DECL:
     705                 :             :       return true;
     706                 :             : 
     707                 :             :     default:
     708                 :             :       return false;
     709                 :             :     }
     710                 :             : }
     711                 :             : 
     712                 :             : /* Return true if T is a gimple invariant address.  */
     713                 :             : 
     714                 :             : bool
     715                 :  5141718228 : is_gimple_invariant_address (const_tree t)
     716                 :             : {
     717                 :  5141718228 :   const_tree op;
     718                 :             : 
     719                 :  5141718228 :   if (TREE_CODE (t) != ADDR_EXPR)
     720                 :             :     return false;
     721                 :             : 
     722                 :  5141718228 :   op = strip_invariant_refs (TREE_OPERAND (t, 0));
     723                 :  5141718228 :   if (!op)
     724                 :             :     return false;
     725                 :             : 
     726                 :  5130758257 :   if (TREE_CODE (op) == MEM_REF)
     727                 :             :     {
     728                 :   401013406 :       const_tree op0 = TREE_OPERAND (op, 0);
     729                 :   401013406 :       return (TREE_CODE (op0) == ADDR_EXPR
     730                 :   401013406 :               && (CONSTANT_CLASS_P (TREE_OPERAND (op0, 0))
     731                 :   138484401 :                   || decl_address_invariant_p (TREE_OPERAND (op0, 0))));
     732                 :             :     }
     733                 :             : 
     734                 :  4729744851 :   return CONSTANT_CLASS_P (op) || decl_address_invariant_p (op);
     735                 :             : }
     736                 :             : 
     737                 :             : /* Return true if T is a gimple invariant address at IPA level
     738                 :             :    (so addresses of variables on stack are not allowed).  */
     739                 :             : 
     740                 :             : bool
     741                 :     2122974 : is_gimple_ip_invariant_address (const_tree t)
     742                 :             : {
     743                 :     2122974 :   const_tree op;
     744                 :             : 
     745                 :     2122974 :   if (TREE_CODE (t) != ADDR_EXPR)
     746                 :             :     return false;
     747                 :             : 
     748                 :     2122974 :   op = strip_invariant_refs (TREE_OPERAND (t, 0));
     749                 :     2122974 :   if (!op)
     750                 :             :     return false;
     751                 :             : 
     752                 :     2121677 :   if (TREE_CODE (op) == MEM_REF)
     753                 :             :     {
     754                 :       86610 :       const_tree op0 = TREE_OPERAND (op, 0);
     755                 :       86610 :       return (TREE_CODE (op0) == ADDR_EXPR
     756                 :       86610 :               && (CONSTANT_CLASS_P (TREE_OPERAND (op0, 0))
     757                 :       64830 :                   || decl_address_ip_invariant_p (TREE_OPERAND (op0, 0))));
     758                 :             :     }
     759                 :             : 
     760                 :     2035067 :   return CONSTANT_CLASS_P (op) || decl_address_ip_invariant_p (op);
     761                 :             : }
     762                 :             : 
     763                 :             : /* Return true if T is a GIMPLE minimal invariant.  It's a restricted
     764                 :             :    form of function invariant.  */
     765                 :             : 
     766                 :             : bool
     767                 : 20551195976 : is_gimple_min_invariant (const_tree t)
     768                 :             : {
     769                 : 20551195976 :   if (TREE_CODE (t) == ADDR_EXPR)
     770                 :  5140567207 :     return is_gimple_invariant_address (t);
     771                 :             : 
     772                 : 15410628769 :   return is_gimple_constant (t);
     773                 :             : }
     774                 :             : 
     775                 :             : /* Return true if T is a GIMPLE interprocedural invariant.  It's a restricted
     776                 :             :    form of gimple minimal invariant.  */
     777                 :             : 
     778                 :             : bool
     779                 :    23858415 : is_gimple_ip_invariant (const_tree t)
     780                 :             : {
     781                 :    23858415 :   if (TREE_CODE (t) == ADDR_EXPR)
     782                 :     2122064 :     return is_gimple_ip_invariant_address (t);
     783                 :             : 
     784                 :    21736351 :   return is_gimple_constant (t);
     785                 :             : }
     786                 :             : 
     787                 :             : /* Return true if T is a non-aggregate register variable.  */
     788                 :             : 
     789                 :             : bool
     790                 : 41401119774 : is_gimple_reg (tree t)
     791                 :             : {
     792                 : 72388891038 :   if (virtual_operand_p (t))
     793                 :             :     return false;
     794                 :             : 
     795                 : 41309386235 :   if (TREE_CODE (t) == SSA_NAME)
     796                 :             :     return true;
     797                 :             : 
     798                 : 15273035850 :   if (!is_gimple_variable (t))
     799                 :             :     return false;
     800                 :             : 
     801                 :  5357982814 :   if (!is_gimple_reg_type (TREE_TYPE (t)))
     802                 :             :     return false;
     803                 :             : 
     804                 :             :   /* A volatile decl is not acceptable because we can't reuse it as
     805                 :             :      needed.  We need to copy it into a temp first.  */
     806                 :  2101453173 :   if (TREE_THIS_VOLATILE (t))
     807                 :             :     return false;
     808                 :             : 
     809                 :             :   /* We define "registers" as things that can be renamed as needed,
     810                 :             :      which with our infrastructure does not apply to memory.  */
     811                 :  1860465134 :   if (needs_to_live_in_memory (t))
     812                 :             :     return false;
     813                 :             : 
     814                 :             :   /* Hard register variables are an interesting case.  For those that
     815                 :             :      are call-clobbered, we don't know where all the calls are, since
     816                 :             :      we don't (want to) take into account which operations will turn
     817                 :             :      into libcalls at the rtl level.  For those that are call-saved,
     818                 :             :      we don't currently model the fact that calls may in fact change
     819                 :             :      global hard registers, nor do we examine ASM_CLOBBERS at the tree
     820                 :             :      level, and so miss variable changes that might imply.  All around,
     821                 :             :      it seems safest to not do too much optimization with these at the
     822                 :             :      tree level at all.  We'll have to rely on the rtl optimizers to
     823                 :             :      clean this up, as there we've got all the appropriate bits exposed.  */
     824                 :  1074496172 :   if (VAR_P (t) && DECL_HARD_REGISTER (t))
     825                 :             :     return false;
     826                 :             : 
     827                 :             :   /* Variables can be marked as having partial definitions, avoid
     828                 :             :      putting them into SSA form.  */
     829                 :  1073064080 :   return !DECL_NOT_GIMPLE_REG_P (t);
     830                 :             : }
     831                 :             : 
     832                 :             : 
     833                 :             : /* Return true if T is a GIMPLE rvalue, i.e. an identifier or a constant.  */
     834                 :             : 
     835                 :             : bool
     836                 :  8394803529 : is_gimple_val (tree t)
     837                 :             : {
     838                 :             :   /* Make loads from volatiles and memory vars explicit.  */
     839                 :  8394803529 :   if (is_gimple_variable (t)
     840                 :  4477194658 :       && is_gimple_reg_type (TREE_TYPE (t))
     841                 : 12849645185 :       && !is_gimple_reg (t))
     842                 :             :     return false;
     843                 :             : 
     844                 :             :   /* These eventually expand into constants, so treat them like that.  */
     845                 :  8384732561 :   if (TREE_CODE (t) == OMP_NEXT_VARIANT
     846                 :  8384732561 :       || TREE_CODE (t) == OMP_TARGET_DEVICE_MATCHES)
     847                 :             :     return true;
     848                 :             : 
     849                 :  8384732509 :   return (is_gimple_variable (t) || is_gimple_min_invariant (t));
     850                 :             : }
     851                 :             : 
     852                 :             : /* Similarly, but accept hard registers as inputs to asm statements.  */
     853                 :             : 
     854                 :             : bool
     855                 :       41683 : is_gimple_asm_val (tree t)
     856                 :             : {
     857                 :       41683 :   if (VAR_P (t) && DECL_HARD_REGISTER (t))
     858                 :             :     return true;
     859                 :             : 
     860                 :       40816 :   return is_gimple_val (t);
     861                 :             : }
     862                 :             : 
     863                 :             : /* Return true if T is a GIMPLE minimal lvalue.  */
     864                 :             : 
     865                 :             : bool
     866                 :    28752464 : is_gimple_min_lval (tree t)
     867                 :             : {
     868                 :    28752464 :   if (!(t = CONST_CAST_TREE (strip_invariant_refs (t))))
     869                 :             :     return false;
     870                 :    28752449 :   return (is_gimple_id (t) || TREE_CODE (t) == MEM_REF);
     871                 :             : }
     872                 :             : 
     873                 :             : /* Return true if T is a valid function operand of a CALL_EXPR.  */
     874                 :             : 
     875                 :             : bool
     876                 :   971218825 : is_gimple_call_addr (tree t)
     877                 :             : {
     878                 :   971218825 :   return (TREE_CODE (t) == OBJ_TYPE_REF || is_gimple_val (t));
     879                 :             : }
     880                 :             : 
     881                 :             : /* Return true if T is a valid address operand of a MEM_REF.  */
     882                 :             : 
     883                 :             : bool
     884                 :  1270167655 : is_gimple_mem_ref_addr (tree t)
     885                 :             : {
     886                 :  1270167655 :   return (is_gimple_reg (t)
     887                 :   321032326 :           || TREE_CODE (t) == INTEGER_CST
     888                 :  1590841680 :           || (TREE_CODE (t) == ADDR_EXPR
     889                 :   318894765 :               && (CONSTANT_CLASS_P (TREE_OPERAND (t, 0))
     890                 :   317512980 :                   || decl_address_invariant_p (TREE_OPERAND (t, 0)))));
     891                 :             : }
     892                 :             : 
     893                 :             : /* Hold trees marked addressable during expand.  */
     894                 :             : 
     895                 :             : static hash_set<tree> *mark_addressable_queue;
     896                 :             : 
     897                 :             : /* Mark X as addressable or queue it up if called during expand.  We
     898                 :             :    don't want to apply it immediately during expand because decls are
     899                 :             :    made addressable at that point due to RTL-only concerns, such as
     900                 :             :    uses of memcpy for block moves, and TREE_ADDRESSABLE changes
     901                 :             :    is_gimple_reg, which might make it seem like a variable that used
     902                 :             :    to be a gimple_reg shouldn't have been an SSA name.  So we queue up
     903                 :             :    this flag setting and only apply it when we're done with GIMPLE and
     904                 :             :    only RTL issues matter.  */
     905                 :             : 
     906                 :             : static void
     907                 :    10163275 : mark_addressable_1 (tree x)
     908                 :             : {
     909                 :    10163275 :   if (!currently_expanding_to_rtl)
     910                 :             :     {
     911                 :    10146568 :       TREE_ADDRESSABLE (x) = 1;
     912                 :    10146568 :       return;
     913                 :             :     }
     914                 :             : 
     915                 :       16707 :   if (!mark_addressable_queue)
     916                 :        4817 :     mark_addressable_queue = new hash_set<tree>();
     917                 :       16707 :   mark_addressable_queue->add (x);
     918                 :             : }
     919                 :             : 
     920                 :             : /* Adaptor for mark_addressable_1 for use in hash_set traversal.  */
     921                 :             : 
     922                 :             : static bool
     923                 :        6494 : mark_addressable_2 (tree const &x, void * ATTRIBUTE_UNUSED = NULL)
     924                 :             : {
     925                 :        6494 :   mark_addressable_1 (x);
     926                 :        6494 :   return false;
     927                 :             : }
     928                 :             : 
     929                 :             : /* Mark all queued trees as addressable, and empty the queue.  To be
     930                 :             :    called right after clearing CURRENTLY_EXPANDING_TO_RTL.  */
     931                 :             : 
     932                 :             : void
     933                 :     1427972 : flush_mark_addressable_queue ()
     934                 :             : {
     935                 :     1427972 :   gcc_assert (!currently_expanding_to_rtl);
     936                 :     1427972 :   if (mark_addressable_queue)
     937                 :             :     {
     938                 :       11311 :       mark_addressable_queue->traverse<void*, mark_addressable_2> (NULL);
     939                 :        9634 :       delete mark_addressable_queue;
     940                 :        4817 :       mark_addressable_queue = NULL;
     941                 :             :     }
     942                 :     1427972 : }
     943                 :             : 
     944                 :             : /* Mark X addressable.  Unlike the langhook we expect X to be in gimple
     945                 :             :    form and we don't do any syntax checking.  */
     946                 :             : 
     947                 :             : void
     948                 :    30903031 : mark_addressable (tree x)
     949                 :             : {
     950                 :    30903031 :   if (TREE_CODE (x) == WITH_SIZE_EXPR)
     951                 :           0 :     x = TREE_OPERAND (x, 0);
     952                 :    35796321 :   while (handled_component_p (x))
     953                 :     4893290 :     x = TREE_OPERAND (x, 0);
     954                 :    30903031 :   if ((TREE_CODE (x) == MEM_REF
     955                 :    30903031 :        || TREE_CODE (x) == TARGET_MEM_REF)
     956                 :    30903031 :       && TREE_CODE (TREE_OPERAND (x, 0)) == ADDR_EXPR)
     957                 :       10354 :     x = TREE_OPERAND (TREE_OPERAND (x, 0), 0);
     958                 :    30903031 :   if (!VAR_P (x)
     959                 :             :       && TREE_CODE (x) != PARM_DECL
     960                 :             :       && TREE_CODE (x) != RESULT_DECL)
     961                 :             :     return;
     962                 :    10156533 :   mark_addressable_1 (x);
     963                 :             : 
     964                 :             :   /* Also mark the artificial SSA_NAME that points to the partition of X.  */
     965                 :    10156533 :   if (VAR_P (x)
     966                 :     9688264 :       && !DECL_EXTERNAL (x)
     967                 :     8566380 :       && !TREE_STATIC (x)
     968                 :     5359663 :       && cfun->gimple_df != NULL
     969                 :    15516196 :       && cfun->gimple_df->decls_to_pointers != NULL)
     970                 :             :     {
     971                 :        1016 :       tree *namep = cfun->gimple_df->decls_to_pointers->get (x);
     972                 :        1016 :       if (namep)
     973                 :         248 :         mark_addressable_1 (*namep);
     974                 :             :     }
     975                 :             : }
     976                 :             : 
     977                 :             : /* Returns true iff T is a valid RHS for an assignment to a renamed
     978                 :             :    user -- or front-end generated artificial -- variable.  */
     979                 :             : 
     980                 :             : bool
     981                 :      766286 : is_gimple_reg_rhs (tree t)
     982                 :             : {
     983                 :      766286 :   return get_gimple_rhs_class (TREE_CODE (t)) != GIMPLE_INVALID_RHS;
     984                 :             : }
     985                 :             : 
     986                 :             : #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.