LCOV - code coverage report
Current view: top level - gcc - function.h (source / functions) Hit Total Coverage
Test: gcc.info Lines: 5 5 100.0 %
Date: 2020-04-04 11:58:09 Functions: 0 0 -
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /* Structure for saving state for a nested function.
       2                 :            :    Copyright (C) 1989-2020 Free Software Foundation, Inc.
       3                 :            : 
       4                 :            : This file is part of GCC.
       5                 :            : 
       6                 :            : GCC is free software; you can redistribute it and/or modify it under
       7                 :            : the terms of the GNU General Public License as published by the Free
       8                 :            : Software Foundation; either version 3, or (at your option) any later
       9                 :            : version.
      10                 :            : 
      11                 :            : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      12                 :            : WARRANTY; without even the implied warranty of MERCHANTABILITY or
      13                 :            : FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      14                 :            : for more details.
      15                 :            : 
      16                 :            : You should have received a copy of the GNU General Public License
      17                 :            : along with GCC; see the file COPYING3.  If not see
      18                 :            : <http://www.gnu.org/licenses/>.  */
      19                 :            : 
      20                 :            : #ifndef GCC_FUNCTION_H
      21                 :            : #define GCC_FUNCTION_H
      22                 :            : 
      23                 :            : 
      24                 :            : /* Stack of pending (incomplete) sequences saved by `start_sequence'.
      25                 :            :    Each element describes one pending sequence.
      26                 :            :    The main insn-chain is saved in the last element of the chain,
      27                 :            :    unless the chain is empty.  */
      28                 :            : 
      29                 :            : struct GTY(()) sequence_stack {
      30                 :            :   /* First and last insns in the chain of the saved sequence.  */
      31                 :            :   rtx_insn *first;
      32                 :            :   rtx_insn *last;
      33                 :            :   struct sequence_stack *next;
      34                 :            : };
      35                 :            : 
      36                 :            : struct GTY(()) emit_status {
      37                 :            :   void ensure_regno_capacity ();
      38                 :            : 
      39                 :            :   /* This is reset to LAST_VIRTUAL_REGISTER + 1 at the start of each function.
      40                 :            :      After rtl generation, it is 1 plus the largest register number used.  */
      41                 :            :   int x_reg_rtx_no;
      42                 :            : 
      43                 :            :   /* Lowest label number in current function.  */
      44                 :            :   int x_first_label_num;
      45                 :            : 
      46                 :            :   /* seq.first and seq.last are the ends of the doubly-linked chain of
      47                 :            :      rtl for the current function.  Both are reset to null at the
      48                 :            :      start of rtl generation for the function. 
      49                 :            : 
      50                 :            :      start_sequence saves both of these on seq.next and then starts
      51                 :            :      a new, nested sequence of insns.
      52                 :            : 
      53                 :            :      seq.next is a stack of pending (incomplete) sequences saved by
      54                 :            :      start_sequence.  Each element describes one pending sequence.
      55                 :            :      The main insn-chain is the last element of the chain.  */
      56                 :            :   struct sequence_stack seq;
      57                 :            : 
      58                 :            :   /* INSN_UID for next insn emitted.
      59                 :            :      Reset to 1 for each function compiled.  */
      60                 :            :   int x_cur_insn_uid;
      61                 :            : 
      62                 :            :   /* INSN_UID for next debug insn emitted.  Only used if
      63                 :            :      --param min-nondebug-insn-uid=<value> is given with nonzero value.  */
      64                 :            :   int x_cur_debug_insn_uid;
      65                 :            : 
      66                 :            :   /* The length of the regno_pointer_align, regno_decl, and x_regno_reg_rtx
      67                 :            :      vectors.  Since these vectors are needed during the expansion phase when
      68                 :            :      the total number of registers in the function is not yet known, the
      69                 :            :      vectors are copied and made bigger when necessary.  */
      70                 :            :   int regno_pointer_align_length;
      71                 :            : 
      72                 :            :   /* Indexed by pseudo register number, if nonzero gives the known alignment
      73                 :            :      for that pseudo (if REG_POINTER is set in x_regno_reg_rtx).
      74                 :            :      Allocated in parallel with x_regno_reg_rtx.  */
      75                 :            :   unsigned char * GTY((skip)) regno_pointer_align;
      76                 :            : };
      77                 :            : 
      78                 :            : 
      79                 :            : /* Indexed by register number, gives an rtx for that register (and only
      80                 :            :    that register).  For pseudo registers, it is the unique rtx for
      81                 :            :    that pseudo.  For hard registers, it is an rtx of the mode specified
      82                 :            :    by reg_raw_mode.
      83                 :            : 
      84                 :            :    FIXME: We could put it into emit_status struct, but gengtype is not
      85                 :            :    able to deal with length attribute nested in top level structures.  */
      86                 :            : 
      87                 :            : extern GTY ((length ("crtl->emit.x_reg_rtx_no"))) rtx * regno_reg_rtx;
      88                 :            : 
      89                 :            : /* For backward compatibility... eventually these should all go away.  */
      90                 :            : #define reg_rtx_no (crtl->emit.x_reg_rtx_no)
      91                 :            : 
      92                 :            : #define REGNO_POINTER_ALIGN(REGNO) (crtl->emit.regno_pointer_align[REGNO])
      93                 :            : 
      94                 :            : struct GTY(()) expr_status {
      95                 :            :   /* Number of units that we should eventually pop off the stack.
      96                 :            :      These are the arguments to function calls that have already returned.  */
      97                 :            :   poly_int64_pod x_pending_stack_adjust;
      98                 :            : 
      99                 :            :   /* Under some ABIs, it is the caller's responsibility to pop arguments
     100                 :            :      pushed for function calls.  A naive implementation would simply pop
     101                 :            :      the arguments immediately after each call.  However, if several
     102                 :            :      function calls are made in a row, it is typically cheaper to pop
     103                 :            :      all the arguments after all of the calls are complete since a
     104                 :            :      single pop instruction can be used.  Therefore, GCC attempts to
     105                 :            :      defer popping the arguments until absolutely necessary.  (For
     106                 :            :      example, at the end of a conditional, the arguments must be popped,
     107                 :            :      since code outside the conditional won't know whether or not the
     108                 :            :      arguments need to be popped.)
     109                 :            : 
     110                 :            :      When INHIBIT_DEFER_POP is nonzero, however, the compiler does not
     111                 :            :      attempt to defer pops.  Instead, the stack is popped immediately
     112                 :            :      after each call.  Rather then setting this variable directly, use
     113                 :            :      NO_DEFER_POP and OK_DEFER_POP.  */
     114                 :            :   int x_inhibit_defer_pop;
     115                 :            : 
     116                 :            :   /* If PREFERRED_STACK_BOUNDARY and PUSH_ROUNDING are defined, the stack
     117                 :            :      boundary can be momentarily unaligned while pushing the arguments.
     118                 :            :      Record the delta since last aligned boundary here in order to get
     119                 :            :      stack alignment in the nested function calls working right.  */
     120                 :            :   poly_int64_pod x_stack_pointer_delta;
     121                 :            : 
     122                 :            :   /* Nonzero means __builtin_saveregs has already been done in this function.
     123                 :            :      The value is the pseudoreg containing the value __builtin_saveregs
     124                 :            :      returned.  */
     125                 :            :   rtx x_saveregs_value;
     126                 :            : 
     127                 :            :   /* Similarly for __builtin_apply_args.  */
     128                 :            :   rtx x_apply_args_value;
     129                 :            : 
     130                 :            :   /* List of labels that must never be deleted.  */
     131                 :            :   vec<rtx_insn *, va_gc> *x_forced_labels;
     132                 :            : };
     133                 :            : 
     134                 :            : typedef struct call_site_record_d *call_site_record;
     135                 :            : 
     136                 :            : /* RTL representation of exception handling.  */
     137                 :            : struct GTY(()) rtl_eh {
     138                 :            :   rtx ehr_stackadj;
     139                 :            :   rtx ehr_handler;
     140                 :            :   rtx_code_label *ehr_label;
     141                 :            : 
     142                 :            :   rtx sjlj_fc;
     143                 :            :   rtx_insn *sjlj_exit_after;
     144                 :            : 
     145                 :            :   vec<uchar, va_gc> *action_record_data;
     146                 :            : 
     147                 :            :   vec<call_site_record, va_gc> *call_site_record_v[2];
     148                 :            : };
     149                 :            : 
     150                 :            : #define pending_stack_adjust (crtl->expr.x_pending_stack_adjust)
     151                 :            : #define inhibit_defer_pop (crtl->expr.x_inhibit_defer_pop)
     152                 :            : #define saveregs_value (crtl->expr.x_saveregs_value)
     153                 :            : #define apply_args_value (crtl->expr.x_apply_args_value)
     154                 :            : #define forced_labels (crtl->expr.x_forced_labels)
     155                 :            : #define stack_pointer_delta (crtl->expr.x_stack_pointer_delta)
     156                 :            : 
     157                 :            : struct gimple_df;
     158                 :            : struct call_site_record_d;
     159                 :            : struct dw_fde_node;
     160                 :            : 
     161                 :            : struct GTY(()) varasm_status {
     162                 :            :   /* If we're using a per-function constant pool, this is it.  */
     163                 :            :   struct rtx_constant_pool *pool;
     164                 :            : 
     165                 :            :   /* Number of tree-constants deferred during the expansion of this
     166                 :            :      function.  */
     167                 :            :   unsigned int deferred_constants;
     168                 :            : };
     169                 :            : 
     170                 :            : 
     171                 :            : /* Data for function partitioning.  */
     172                 :            : struct GTY(()) function_subsections {
     173                 :            :   /* Assembly labels for the hot and cold text sections, to
     174                 :            :      be used by debugger functions for determining the size of text
     175                 :            :      sections.  */
     176                 :            : 
     177                 :            :   const char *hot_section_label;
     178                 :            :   const char *cold_section_label;
     179                 :            :   const char *hot_section_end_label;
     180                 :            :   const char *cold_section_end_label;
     181                 :            : };
     182                 :            : 
     183                 :            : /* Describe an empty area of space in the stack frame.  These can be chained
     184                 :            :    into a list; this is used to keep track of space wasted for alignment
     185                 :            :    reasons.  */
     186                 :            : class GTY(()) frame_space
     187                 :            : {
     188                 :            : public:
     189                 :            :   class frame_space *next;
     190                 :            : 
     191                 :            :   poly_int64 start;
     192                 :            :   poly_int64 length;
     193                 :            : };
     194                 :            : 
     195                 :            : /* Describe emitted calls for -fcallgraph-info.  */
     196                 :            : struct GTY(()) callinfo_callee
     197                 :            : {
     198                 :            :   location_t location;
     199                 :            :   tree decl;
     200                 :            : };
     201                 :            : 
     202                 :            : /* Describe dynamic allocation for -fcallgraph-info=da.  */
     203                 :            : struct GTY(()) callinfo_dalloc
     204                 :            : {
     205                 :            :   location_t location;
     206                 :            :   char const *name;
     207                 :            : };
     208                 :            : 
     209                 :            : class GTY(()) stack_usage
     210                 :            : {
     211                 :            : public:
     212                 :            :   /* # of bytes of static stack space allocated by the function.  */
     213                 :            :   HOST_WIDE_INT static_stack_size;
     214                 :            : 
     215                 :            :   /* # of bytes of dynamic stack space allocated by the function.  This is
     216                 :            :      meaningful only if has_unbounded_dynamic_stack_size is zero.  */
     217                 :            :   HOST_WIDE_INT dynamic_stack_size;
     218                 :            : 
     219                 :            :   /* Upper bound on the number of bytes pushed onto the stack after the
     220                 :            :      prologue.  If !ACCUMULATE_OUTGOING_ARGS, it contains the outgoing
     221                 :            :      arguments.  */
     222                 :            :   poly_int64 pushed_stack_size;
     223                 :            : 
     224                 :            :   /* Nonzero if the amount of stack space allocated dynamically cannot
     225                 :            :      be bounded at compile-time.  */
     226                 :            :   unsigned int has_unbounded_dynamic_stack_size : 1;
     227                 :            : 
     228                 :            :   /* Functions called within the function, if callgraph is enabled.  */
     229                 :            :   vec<callinfo_callee, va_gc> *callees;
     230                 :            : 
     231                 :            :   /* Dynamic allocations encountered within the function, if callgraph
     232                 :            :      da is enabled.  */
     233                 :            :   vec<callinfo_dalloc, va_gc> *dallocs;
     234                 :            : };
     235                 :            : 
     236                 :            : #define current_function_static_stack_size (cfun->su->static_stack_size)
     237                 :            : #define current_function_dynamic_stack_size (cfun->su->dynamic_stack_size)
     238                 :            : #define current_function_pushed_stack_size (cfun->su->pushed_stack_size)
     239                 :            : #define current_function_has_unbounded_dynamic_stack_size \
     240                 :            :   (cfun->su->has_unbounded_dynamic_stack_size)
     241                 :            : #define current_function_allocates_dynamic_stack_space    \
     242                 :            :   (current_function_dynamic_stack_size != 0               \
     243                 :            :    || current_function_has_unbounded_dynamic_stack_size)
     244                 :            : 
     245                 :            : /* This structure can save all the important global and static variables
     246                 :            :    describing the status of the current function.  */
     247                 :            : 
     248                 :            : struct GTY(()) function {
     249                 :            :   struct eh_status *eh;
     250                 :            : 
     251                 :            :   /* The control flow graph for this function.  */
     252                 :            :   struct control_flow_graph *cfg;
     253                 :            : 
     254                 :            :   /* GIMPLE body for this function.  */
     255                 :            :   gimple_seq gimple_body;
     256                 :            : 
     257                 :            :   /* SSA and dataflow information.  */
     258                 :            :   struct gimple_df *gimple_df;
     259                 :            : 
     260                 :            :   /* The loops in this function.  */
     261                 :            :   struct loops *x_current_loops;
     262                 :            : 
     263                 :            :   /* Filled by the GIMPLE and RTL FEs, pass to start compilation with.  */
     264                 :            :   char *pass_startwith;
     265                 :            : 
     266                 :            :   /* The stack usage of this function.  */
     267                 :            :   class stack_usage *su;
     268                 :            : 
     269                 :            :   /* Value histograms attached to particular statements.  */
     270                 :            :   htab_t GTY((skip)) value_histograms;
     271                 :            : 
     272                 :            :   /* For function.c.  */
     273                 :            : 
     274                 :            :   /* Points to the FUNCTION_DECL of this function.  */
     275                 :            :   tree decl;
     276                 :            : 
     277                 :            :   /* A PARM_DECL that should contain the static chain for this function.
     278                 :            :      It will be initialized at the beginning of the function.  */
     279                 :            :   tree static_chain_decl;
     280                 :            : 
     281                 :            :   /* An expression that contains the non-local goto save area.  The first
     282                 :            :      word is the saved frame pointer and the second is the saved stack
     283                 :            :      pointer.  */
     284                 :            :   tree nonlocal_goto_save_area;
     285                 :            : 
     286                 :            :   /* Vector of function local variables, functions, types and constants.  */
     287                 :            :   vec<tree, va_gc> *local_decls;
     288                 :            : 
     289                 :            :   /* For md files.  */
     290                 :            : 
     291                 :            :   /* tm.h can use this to store whatever it likes.  */
     292                 :            :   struct machine_function * GTY ((maybe_undef)) machine;
     293                 :            : 
     294                 :            :   /* Language-specific code can use this to store whatever it likes.  */
     295                 :            :   struct language_function * language;
     296                 :            : 
     297                 :            :   /* Used types hash table.  */
     298                 :            :   hash_set<tree> *GTY (()) used_types_hash;
     299                 :            : 
     300                 :            :   /* Dwarf2 Frame Description Entry, containing the Call Frame Instructions
     301                 :            :      used for unwinding.  Only set when either dwarf2 unwinding or dwarf2
     302                 :            :      debugging is enabled.  */
     303                 :            :   struct dw_fde_node *fde;
     304                 :            : 
     305                 :            :   /* Last statement uid.  */
     306                 :            :   int last_stmt_uid;
     307                 :            : 
     308                 :            :   /* Debug marker counter.  Count begin stmt markers.  We don't have
     309                 :            :      to keep it exact, it's more of a rough estimate to enable us to
     310                 :            :      decide whether they are too many to copy during inlining, or when
     311                 :            :      expanding to RTL.  */
     312                 :            :   int debug_marker_count;
     313                 :            : 
     314                 :            :   /* Function sequence number for profiling, debugging, etc.  */
     315                 :            :   int funcdef_no;
     316                 :            : 
     317                 :            :   /* Line number of the start of the function for debugging purposes.  */
     318                 :            :   location_t function_start_locus;
     319                 :            : 
     320                 :            :   /* Line number of the end of the function.  */
     321                 :            :   location_t function_end_locus;
     322                 :            : 
     323                 :            :   /* Properties used by the pass manager.  */
     324                 :            :   unsigned int curr_properties;
     325                 :            :   unsigned int last_verified;
     326                 :            : 
     327                 :            :   /* Non-null if the function does something that would prevent it from
     328                 :            :      being copied; this applies to both versioning and inlining.  Set to
     329                 :            :      a string describing the reason for failure.  */
     330                 :            :   const char * GTY((skip)) cannot_be_copied_reason;
     331                 :            : 
     332                 :            :   /* Last assigned dependence info clique.  */
     333                 :            :   unsigned short last_clique;
     334                 :            : 
     335                 :            :   /* Collected bit flags.  */
     336                 :            : 
     337                 :            :   /* Number of units of general registers that need saving in stdarg
     338                 :            :      function.  What unit is depends on the backend, either it is number
     339                 :            :      of bytes, or it can be number of registers.  */
     340                 :            :   unsigned int va_list_gpr_size : 8;
     341                 :            : 
     342                 :            :   /* Number of units of floating point registers that need saving in stdarg
     343                 :            :      function.  */
     344                 :            :   unsigned int va_list_fpr_size : 8;
     345                 :            : 
     346                 :            :   /* Nonzero if function being compiled can call setjmp.  */
     347                 :            :   unsigned int calls_setjmp : 1;
     348                 :            : 
     349                 :            :   /* Nonzero if function being compiled can call alloca,
     350                 :            :      either as a subroutine or builtin.  */
     351                 :            :   unsigned int calls_alloca : 1;
     352                 :            : 
     353                 :            :   /* Nonzero if function being compiled can call __builtin_eh_return.  */
     354                 :            :   unsigned int calls_eh_return : 1;
     355                 :            : 
     356                 :            :   /* Nonzero if function being compiled receives nonlocal gotos
     357                 :            :      from nested functions.  */
     358                 :            :   unsigned int has_nonlocal_label : 1;
     359                 :            : 
     360                 :            :   /* Nonzero if function being compiled has a forced label
     361                 :            :      placed into static storage.  */
     362                 :            :   unsigned int has_forced_label_in_static : 1;
     363                 :            : 
     364                 :            :   /* Nonzero if we've set cannot_be_copied_reason.  I.e. if
     365                 :            :      (cannot_be_copied_set && !cannot_be_copied_reason), the function
     366                 :            :      can in fact be copied.  */
     367                 :            :   unsigned int cannot_be_copied_set : 1;
     368                 :            : 
     369                 :            :   /* Nonzero if current function uses stdarg.h or equivalent.  */
     370                 :            :   unsigned int stdarg : 1;
     371                 :            : 
     372                 :            :   unsigned int after_inlining : 1;
     373                 :            :   unsigned int always_inline_functions_inlined : 1;
     374                 :            : 
     375                 :            :   /* Nonzero if function being compiled can throw synchronous non-call
     376                 :            :      exceptions.  */
     377                 :            :   unsigned int can_throw_non_call_exceptions : 1;
     378                 :            : 
     379                 :            :   /* Nonzero if instructions that may throw exceptions but don't otherwise
     380                 :            :      contribute to the execution of the program can be deleted.  */
     381                 :            :   unsigned int can_delete_dead_exceptions : 1;
     382                 :            : 
     383                 :            :   /* Fields below this point are not set for abstract functions; see
     384                 :            :      allocate_struct_function.  */
     385                 :            : 
     386                 :            :   /* Nonzero if function being compiled needs to be given an address
     387                 :            :      where the value should be stored.  */
     388                 :            :   unsigned int returns_struct : 1;
     389                 :            : 
     390                 :            :   /* Nonzero if function being compiled needs to
     391                 :            :      return the address of where it has put a structure value.  */
     392                 :            :   unsigned int returns_pcc_struct : 1;
     393                 :            : 
     394                 :            :   /* Nonzero if this function has local DECL_HARD_REGISTER variables.
     395                 :            :      In this case code motion has to be done more carefully.  */
     396                 :            :   unsigned int has_local_explicit_reg_vars : 1;
     397                 :            : 
     398                 :            :   /* Nonzero if the current function is a thunk, i.e., a lightweight
     399                 :            :      function implemented by the output_mi_thunk hook) that just
     400                 :            :      adjusts one of its arguments and forwards to another
     401                 :            :      function.  */
     402                 :            :   unsigned int is_thunk : 1;
     403                 :            : 
     404                 :            :   /* Nonzero if the current function contains any loops with
     405                 :            :      loop->force_vectorize set.  */
     406                 :            :   unsigned int has_force_vectorize_loops : 1;
     407                 :            : 
     408                 :            :   /* Nonzero if the current function contains any loops with
     409                 :            :      nonzero value in loop->simduid.  */
     410                 :            :   unsigned int has_simduid_loops : 1;
     411                 :            : 
     412                 :            :   /* Nonzero when the tail call has been identified.  */
     413                 :            :   unsigned int tail_call_marked : 1;
     414                 :            : 
     415                 :            :   /* Nonzero if the current function contains a #pragma GCC unroll.  */
     416                 :            :   unsigned int has_unroll : 1;
     417                 :            : 
     418                 :            :   /* Set when the function was compiled with generation of debug
     419                 :            :      (begin stmt, inline entry, ...) markers enabled.  */
     420                 :            :   unsigned int debug_nonbind_markers : 1;
     421                 :            : 
     422                 :            :   /* Set if this is a coroutine-related function.  */
     423                 :            :   unsigned int coroutine_component : 1;
     424                 :            : };
     425                 :            : 
     426                 :            : /* Add the decl D to the local_decls list of FUN.  */
     427                 :            : 
     428                 :            : void add_local_decl (struct function *fun, tree d);
     429                 :            : 
     430                 :            : #define FOR_EACH_LOCAL_DECL(FUN, I, D)          \
     431                 :            :   FOR_EACH_VEC_SAFE_ELT_REVERSE ((FUN)->local_decls, I, D)
     432                 :            : 
     433                 :            : /* Record a final call to CALLEE at LOCATION.  */
     434                 :            : void record_final_call (tree callee, location_t location);
     435                 :            : 
     436                 :            : /* Record a dynamic allocation made for DECL_OR_EXP.  */
     437                 :            : void record_dynamic_alloc (tree decl_or_exp);
     438                 :            : 
     439                 :            : /* If va_list_[gf]pr_size is set to this, it means we don't know how
     440                 :            :    many units need to be saved.  */
     441                 :            : #define VA_LIST_MAX_GPR_SIZE    255
     442                 :            : #define VA_LIST_MAX_FPR_SIZE    255
     443                 :            : 
     444                 :            : /* The function currently being compiled.  */
     445                 :            : extern GTY(()) struct function *cfun;
     446                 :            : 
     447                 :            : /* In order to ensure that cfun is not set directly, we redefine it so
     448                 :            :    that it is not an lvalue.  Rather than assign to cfun, use
     449                 :            :    push_cfun or set_cfun.  */
     450                 :            : #define cfun (cfun + 0)
     451                 :            : 
     452                 :            : /* Nonzero if we've already converted virtual regs to hard regs.  */
     453                 :            : extern int virtuals_instantiated;
     454                 :            : 
     455                 :            : /* Nonzero if at least one trampoline has been created.  */
     456                 :            : extern int trampolines_created;
     457                 :            : 
     458                 :            : struct GTY((for_user)) types_used_by_vars_entry {
     459                 :            :   tree type;
     460                 :            :   tree var_decl;
     461                 :            : };
     462                 :            : 
     463                 :            : struct used_type_hasher : ggc_ptr_hash<types_used_by_vars_entry>
     464                 :            : {
     465                 :            :   static hashval_t hash (types_used_by_vars_entry *);
     466                 :            :   static bool equal (types_used_by_vars_entry *, types_used_by_vars_entry *);
     467                 :            : };
     468                 :            : 
     469                 :            : /* Hash table making the relationship between a global variable
     470                 :            :    and the types it references in its initializer. The key of the
     471                 :            :    entry is a referenced type, and the value is the DECL of the global
     472                 :            :    variable. types_use_by_vars_do_hash and types_used_by_vars_eq below are
     473                 :            :    the hash and equality functions to use for this hash table.  */
     474                 :            : extern GTY(()) hash_table<used_type_hasher> *types_used_by_vars_hash;
     475                 :            : 
     476                 :            : void types_used_by_var_decl_insert (tree type, tree var_decl);
     477                 :            : 
     478                 :            : /* During parsing of a global variable, this vector contains the types
     479                 :            :    referenced by the global variable.  */
     480                 :            : extern GTY(()) vec<tree, va_gc> *types_used_by_cur_var_decl;
     481                 :            : 
     482                 :            : 
     483                 :            : /* Return the loop tree of FN.  */
     484                 :            : 
     485                 :            : inline struct loops *
     486                 : 6075761402 : loops_for_fn (struct function *fn)
     487                 :            : {
     488                 : 4918028256 :   return fn->x_current_loops;
     489                 :            : }
     490                 :            : 
     491                 :            : /* Set the loop tree of FN to LOOPS.  */
     492                 :            : 
     493                 :            : inline void
     494                 :    6567060 : set_loops_for_fn (struct function *fn, struct loops *loops)
     495                 :            : {
     496                 :    6567060 :   gcc_checking_assert (fn->x_current_loops == NULL || loops == NULL);
     497                 :    6567060 :   fn->x_current_loops = loops;
     498                 :            : }
     499                 :            : 
     500                 :            : /* For backward compatibility... eventually these should all go away.  */
     501                 :            : #define current_function_funcdef_no (cfun->funcdef_no)
     502                 :            : 
     503                 :            : #define current_loops (cfun->x_current_loops)
     504                 :            : #define dom_computed (cfun->cfg->x_dom_computed)
     505                 :            : #define n_bbs_in_dom_tree (cfun->cfg->x_n_bbs_in_dom_tree)
     506                 :            : #define VALUE_HISTOGRAMS(fun) (fun)->value_histograms
     507                 :            : 
     508                 :            : /* A pointer to a function to create target specific, per-function
     509                 :            :    data structures.  */
     510                 :            : extern struct machine_function * (*init_machine_status) (void);
     511                 :            : 
     512                 :            : /* Structure to record the size of a sequence of arguments
     513                 :            :    as the sum of a tree-expression and a constant.  This structure is
     514                 :            :    also used to store offsets from the stack, which might be negative,
     515                 :            :    so the variable part must be ssizetype, not sizetype.  */
     516                 :            : 
     517                 :            : struct args_size
     518                 :            : {
     519                 :            :   poly_int64_pod constant;
     520                 :            :   tree var;
     521                 :            : };
     522                 :            : 
     523                 :            : /* Package up various arg related fields of struct args for
     524                 :            :    locate_and_pad_parm.  */
     525                 :            : struct locate_and_pad_arg_data
     526                 :            : {
     527                 :            :   /* Size of this argument on the stack, rounded up for any padding it
     528                 :            :      gets.  If REG_PARM_STACK_SPACE is defined, then register parms are
     529                 :            :      counted here, otherwise they aren't.  */
     530                 :            :   struct args_size size;
     531                 :            :   /* Offset of this argument from beginning of stack-args.  */
     532                 :            :   struct args_size offset;
     533                 :            :   /* Offset to the start of the stack slot.  Different from OFFSET
     534                 :            :      if this arg pads downward.  */
     535                 :            :   struct args_size slot_offset;
     536                 :            :   /* The amount that the stack pointer needs to be adjusted to
     537                 :            :      force alignment for the next argument.  */
     538                 :            :   struct args_size alignment_pad;
     539                 :            :   /* Which way we should pad this arg.  */
     540                 :            :   pad_direction where_pad;
     541                 :            :   /* slot_offset is at least this aligned.  */
     542                 :            :   unsigned int boundary;
     543                 :            : };
     544                 :            : 
     545                 :            : /* Add the value of the tree INC to the `struct args_size' TO.  */
     546                 :            : 
     547                 :            : #define ADD_PARM_SIZE(TO, INC)                                  \
     548                 :            : do {                                                            \
     549                 :            :   tree inc = (INC);                                             \
     550                 :            :   if (tree_fits_shwi_p (inc))                                   \
     551                 :            :     (TO).constant += tree_to_shwi (inc);                        \
     552                 :            :   else if ((TO).var == 0)                                       \
     553                 :            :     (TO).var = fold_convert (ssizetype, inc);                   \
     554                 :            :   else                                                          \
     555                 :            :     (TO).var = size_binop (PLUS_EXPR, (TO).var,                 \
     556                 :            :                            fold_convert (ssizetype, inc));      \
     557                 :            : } while (0)
     558                 :            : 
     559                 :            : #define SUB_PARM_SIZE(TO, DEC)                                  \
     560                 :            : do {                                                            \
     561                 :            :   tree dec = (DEC);                                             \
     562                 :            :   if (tree_fits_shwi_p (dec))                                   \
     563                 :            :     (TO).constant -= tree_to_shwi (dec);                        \
     564                 :            :   else if ((TO).var == 0)                                       \
     565                 :            :     (TO).var = size_binop (MINUS_EXPR, ssize_int (0),           \
     566                 :            :                            fold_convert (ssizetype, dec));      \
     567                 :            :   else                                                          \
     568                 :            :     (TO).var = size_binop (MINUS_EXPR, (TO).var,                \
     569                 :            :                            fold_convert (ssizetype, dec));      \
     570                 :            : } while (0)
     571                 :            : 
     572                 :            : /* Convert the implicit sum in a `struct args_size' into a tree
     573                 :            :    of type ssizetype.  */
     574                 :            : #define ARGS_SIZE_TREE(SIZE)                                    \
     575                 :            : ((SIZE).var == 0 ? ssize_int ((SIZE).constant)                  \
     576                 :            :  : size_binop (PLUS_EXPR, fold_convert (ssizetype, (SIZE).var), \
     577                 :            :                ssize_int ((SIZE).constant)))
     578                 :            : 
     579                 :            : /* Convert the implicit sum in a `struct args_size' into an rtx.  */
     580                 :            : #define ARGS_SIZE_RTX(SIZE)                                     \
     581                 :            : ((SIZE).var == 0 ? gen_int_mode ((SIZE).constant, Pmode)        \
     582                 :            :  : expand_normal (ARGS_SIZE_TREE (SIZE)))
     583                 :            : 
     584                 :            : #define ASLK_REDUCE_ALIGN 1
     585                 :            : #define ASLK_RECORD_PAD 2
     586                 :            : 
     587                 :            : /* If pointers to member functions use the least significant bit to
     588                 :            :    indicate whether a function is virtual, ensure a pointer
     589                 :            :    to this function will have that bit clear.  */
     590                 :            : #define MINIMUM_METHOD_BOUNDARY \
     591                 :            :   ((TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn)       \
     592                 :            :    ? MAX (FUNCTION_BOUNDARY, 2 * BITS_PER_UNIT) : FUNCTION_BOUNDARY)
     593                 :            : 
     594                 :            : enum stack_clash_probes {
     595                 :            :   NO_PROBE_NO_FRAME,
     596                 :            :   NO_PROBE_SMALL_FRAME,
     597                 :            :   PROBE_INLINE,
     598                 :            :   PROBE_LOOP
     599                 :            : };
     600                 :            : 
     601                 :            : extern void dump_stack_clash_frame_info (enum stack_clash_probes, bool);
     602                 :            : 
     603                 :            : 
     604                 :            : extern void push_function_context (void);
     605                 :            : extern void pop_function_context (void);
     606                 :            : 
     607                 :            : /* Save and restore status information for a nested function.  */
     608                 :            : extern void free_after_parsing (struct function *);
     609                 :            : extern void free_after_compilation (struct function *);
     610                 :            : 
     611                 :            : /* Return size needed for stack frame based on slots so far allocated.
     612                 :            :    This size counts from zero.  It is not rounded to STACK_BOUNDARY;
     613                 :            :    the caller may have to do that.  */
     614                 :            : extern poly_int64 get_frame_size (void);
     615                 :            : 
     616                 :            : /* Issue an error message and return TRUE if frame OFFSET overflows in
     617                 :            :    the signed target pointer arithmetics for function FUNC.  Otherwise
     618                 :            :    return FALSE.  */
     619                 :            : extern bool frame_offset_overflow (poly_int64, tree);
     620                 :            : 
     621                 :            : extern unsigned int spill_slot_alignment (machine_mode);
     622                 :            : 
     623                 :            : extern rtx assign_stack_local_1 (machine_mode, poly_int64, int, int);
     624                 :            : extern rtx assign_stack_local (machine_mode, poly_int64, int);
     625                 :            : extern rtx assign_stack_temp_for_type (machine_mode, poly_int64, tree);
     626                 :            : extern rtx assign_stack_temp (machine_mode, poly_int64);
     627                 :            : extern rtx assign_temp (tree, int, int);
     628                 :            : extern void update_temp_slot_address (rtx, rtx);
     629                 :            : extern void preserve_temp_slots (rtx);
     630                 :            : extern void free_temp_slots (void);
     631                 :            : extern void push_temp_slots (void);
     632                 :            : extern void pop_temp_slots (void);
     633                 :            : extern void init_temp_slots (void);
     634                 :            : extern rtx get_hard_reg_initial_reg (rtx);
     635                 :            : extern rtx get_hard_reg_initial_val (machine_mode, unsigned int);
     636                 :            : extern rtx has_hard_reg_initial_val (machine_mode, unsigned int);
     637                 :            : 
     638                 :            : /* Called from gimple_expand_cfg.  */
     639                 :            : extern unsigned int emit_initial_value_sets (void);
     640                 :            : 
     641                 :            : extern bool initial_value_entry (int i, rtx *, rtx *);
     642                 :            : extern void instantiate_decl_rtl (rtx x);
     643                 :            : extern int aggregate_value_p (const_tree, const_tree);
     644                 :            : extern bool use_register_for_decl (const_tree);
     645                 :            : extern gimple_seq gimplify_parameters (gimple_seq *);
     646                 :            : extern void locate_and_pad_parm (machine_mode, tree, int, int, int,
     647                 :            :                                  tree, struct args_size *,
     648                 :            :                                  struct locate_and_pad_arg_data *);
     649                 :            : extern void generate_setjmp_warnings (void);
     650                 :            : 
     651                 :            : /* Identify BLOCKs referenced by more than one NOTE_INSN_BLOCK_{BEG,END},
     652                 :            :    and create duplicate blocks.  */
     653                 :            : extern void reorder_blocks (void);
     654                 :            : extern void clear_block_marks (tree);
     655                 :            : extern tree blocks_nreverse (tree);
     656                 :            : extern tree block_chainon (tree, tree);
     657                 :            : 
     658                 :            : /* Set BLOCK_NUMBER for all the blocks in FN.  */
     659                 :            : extern void number_blocks (tree);
     660                 :            : 
     661                 :            : /* cfun shouldn't be set directly; use one of these functions instead.  */
     662                 :            : extern void set_cfun (struct function *new_cfun, bool force = false);
     663                 :            : extern void push_cfun (struct function *new_cfun);
     664                 :            : extern void pop_cfun (void);
     665                 :            : 
     666                 :            : extern int get_next_funcdef_no (void);
     667                 :            : extern int get_last_funcdef_no (void);
     668                 :            : extern void allocate_struct_function (tree, bool);
     669                 :            : extern void push_struct_function (tree fndecl);
     670                 :            : extern void push_dummy_function (bool);
     671                 :            : extern void pop_dummy_function (void);
     672                 :            : extern void init_dummy_function_start (void);
     673                 :            : extern void init_function_start (tree);
     674                 :            : extern void stack_protect_epilogue (void);
     675                 :            : extern void expand_function_start (tree);
     676                 :            : extern void expand_dummy_function_end (void);
     677                 :            : 
     678                 :            : extern void thread_prologue_and_epilogue_insns (void);
     679                 :            : extern void diddle_return_value (void (*)(rtx, void*), void*);
     680                 :            : extern void clobber_return_register (void);
     681                 :            : extern void expand_function_end (void);
     682                 :            : extern rtx get_arg_pointer_save_area (void);
     683                 :            : extern void maybe_copy_prologue_epilogue_insn (rtx, rtx);
     684                 :            : extern int prologue_contains (const rtx_insn *);
     685                 :            : extern int epilogue_contains (const rtx_insn *);
     686                 :            : extern int prologue_epilogue_contains (const rtx_insn *);
     687                 :            : extern void record_prologue_seq (rtx_insn *);
     688                 :            : extern void record_epilogue_seq (rtx_insn *);
     689                 :            : extern void emit_return_into_block (bool simple_p, basic_block bb);
     690                 :            : extern void set_return_jump_label (rtx_insn *);
     691                 :            : extern bool active_insn_between (rtx_insn *head, rtx_insn *tail);
     692                 :            : extern vec<edge> convert_jumps_to_returns (basic_block last_bb, bool simple_p,
     693                 :            :                                            vec<edge> unconverted);
     694                 :            : extern basic_block emit_return_for_exit (edge exit_fallthru_edge,
     695                 :            :                                          bool simple_p);
     696                 :            : extern void reposition_prologue_and_epilogue_notes (void);
     697                 :            : 
     698                 :            : /* Returns the name of the current function.  */
     699                 :            : extern const char *fndecl_name (tree);
     700                 :            : extern const char *function_name (struct function *);
     701                 :            : extern const char *current_function_name (void);
     702                 :            : 
     703                 :            : extern void used_types_insert (tree);
     704                 :            : 
     705                 :            : #endif  /* GCC_FUNCTION_H */

Generated by: LCOV version 1.0

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 --enable-host-shared. GCC test suite is run with the built compiler.