2018-07-02 Paul Thomas <pault@gcc.gnu.org>

[official-gcc.git] / gcc / dumpfile.c

/* Dump infrastructure for optimizations and intermediate representation.
   Copyright (C) 2012-2018 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "options.h"
#include "tree.h"
#include "gimple-pretty-print.h"
#include "diagnostic-core.h"
#include "dumpfile.h"
#include "context.h"
#include "profile-count.h"
#include "tree-cfg.h"
#include "langhooks.h"
#include "backend.h" /* for gimple.h.  */
#include "gimple.h" /* for dump_user_location_t ctor.  */
#include "rtl.h" /* for dump_user_location_t ctor.  */
#include "selftest.h"

/* If non-NULL, return one past-the-end of the matching SUBPART of
   the WHOLE string.  */
#define skip_leading_substring(whole,  part) \
   (strncmp (whole, part, strlen (part)) ? NULL : whole + strlen (part))

static dump_flags_t pflags;                   /* current dump_flags */

static void dump_loc (dump_flags_t, FILE *, source_location);

/* Current -fopt-info output stream, if any, and flags.  */
static FILE *alt_dump_file = NULL;
static dump_flags_t alt_flags;

static FILE *dump_open_alternate_stream (struct dump_file_info *);

/* These are currently used for communicating between passes.
   However, instead of accessing them directly, the passes can use
   dump_printf () for dumps.  */
FILE *dump_file = NULL;
const char *dump_file_name;
dump_flags_t dump_flags;
bool dumps_are_enabled = false;


/* Update the "dumps_are_enabled" global; to be called whenever dump_file
   or alt_dump_file change.  */

static void
refresh_dumps_are_enabled ()
{
  dumps_are_enabled = (dump_file || alt_dump_file);
}

/* Set global "dump_file" to NEW_DUMP_FILE, refreshing the "dumps_are_enabled"
   global.  */

void
set_dump_file (FILE *new_dump_file)
{
  dump_file = new_dump_file;
  refresh_dumps_are_enabled ();
}

/* Set "alt_dump_file" to NEW_ALT_DUMP_FILE, refreshing the "dumps_are_enabled"
   global.  */

static void
set_alt_dump_file (FILE *new_alt_dump_file)
{
  alt_dump_file = new_alt_dump_file;
  refresh_dumps_are_enabled ();
}

#define DUMP_FILE_INFO(suffix, swtch, dkind, num) \
  {suffix, swtch, NULL, NULL, NULL, NULL, NULL, dkind, TDF_NONE, TDF_NONE, \
   OPTGROUP_NONE, 0, 0, num, false, false}

/* Table of tree dump switches. This must be consistent with the
   TREE_DUMP_INDEX enumeration in dumpfile.h.  */
static struct dump_file_info dump_files[TDI_end] =
{
  DUMP_FILE_INFO (NULL, NULL, DK_none, 0),
  DUMP_FILE_INFO (".cgraph", "ipa-cgraph", DK_ipa, 0),
  DUMP_FILE_INFO (".type-inheritance", "ipa-type-inheritance", DK_ipa, 0),
  DUMP_FILE_INFO (".ipa-clones", "ipa-clones", DK_ipa, 0),
  DUMP_FILE_INFO (".original", "tree-original", DK_tree, 0),
  DUMP_FILE_INFO (".gimple", "tree-gimple", DK_tree, 0),
  DUMP_FILE_INFO (".nested", "tree-nested", DK_tree, 0),
  DUMP_FILE_INFO (".lto-stream-out", "ipa-lto-stream-out", DK_ipa, 0),
#define FIRST_AUTO_NUMBERED_DUMP 1
#define FIRST_ME_AUTO_NUMBERED_DUMP 4

  DUMP_FILE_INFO (NULL, "lang-all", DK_lang, 0),
  DUMP_FILE_INFO (NULL, "tree-all", DK_tree, 0),
  DUMP_FILE_INFO (NULL, "rtl-all", DK_rtl, 0),
  DUMP_FILE_INFO (NULL, "ipa-all", DK_ipa, 0),
};

/* Define a name->number mapping for a dump flag value.  */
template <typename ValueType>
struct kv_pair
{
  const char *const name;       /* the name of the value */
  const ValueType value;        /* the value of the name */
};

/* Table of dump options. This must be consistent with the TDF_* flags
   in dumpfile.h and opt_info_options below. */
static const kv_pair<dump_flags_t> dump_options[] =
{
  {"address", TDF_ADDRESS},
  {"asmname", TDF_ASMNAME},
  {"slim", TDF_SLIM},
  {"raw", TDF_RAW},
  {"graph", TDF_GRAPH},
  {"details", (TDF_DETAILS | MSG_OPTIMIZED_LOCATIONS
               | MSG_MISSED_OPTIMIZATION
               | MSG_NOTE)},
  {"cselib", TDF_CSELIB},
  {"stats", TDF_STATS},
  {"blocks", TDF_BLOCKS},
  {"vops", TDF_VOPS},
  {"lineno", TDF_LINENO},
  {"uid", TDF_UID},
  {"stmtaddr", TDF_STMTADDR},
  {"memsyms", TDF_MEMSYMS},
  {"eh", TDF_EH},
  {"alias", TDF_ALIAS},
  {"nouid", TDF_NOUID},
  {"enumerate_locals", TDF_ENUMERATE_LOCALS},
  {"scev", TDF_SCEV},
  {"gimple", TDF_GIMPLE},
  {"folding", TDF_FOLDING},
  {"optimized", MSG_OPTIMIZED_LOCATIONS},
  {"missed", MSG_MISSED_OPTIMIZATION},
  {"note", MSG_NOTE},
  {"optall", MSG_ALL},
  {"all", dump_flags_t (~(TDF_RAW | TDF_SLIM | TDF_LINENO | TDF_GRAPH
                        | TDF_STMTADDR | TDF_RHS_ONLY | TDF_NOUID
                        | TDF_ENUMERATE_LOCALS | TDF_SCEV | TDF_GIMPLE))},
  {NULL, TDF_NONE}
};

/* A subset of the dump_options table which is used for -fopt-info
   types. This must be consistent with the MSG_* flags in dumpfile.h.
 */
static const kv_pair<dump_flags_t> optinfo_verbosity_options[] =
{
  {"optimized", MSG_OPTIMIZED_LOCATIONS},
  {"missed", MSG_MISSED_OPTIMIZATION},
  {"note", MSG_NOTE},
  {"all", MSG_ALL},
  {NULL, TDF_NONE}
};

/* Flags used for -fopt-info groups.  */
static const kv_pair<optgroup_flags_t> optgroup_options[] =
{
  {"ipa", OPTGROUP_IPA},
  {"loop", OPTGROUP_LOOP},
  {"inline", OPTGROUP_INLINE},
  {"omp", OPTGROUP_OMP},
  {"vec", OPTGROUP_VEC},
  {"optall", OPTGROUP_ALL},
  {NULL, OPTGROUP_NONE}
};

gcc::dump_manager::dump_manager ():
  m_next_dump (FIRST_AUTO_NUMBERED_DUMP),
  m_extra_dump_files (NULL),
  m_extra_dump_files_in_use (0),
  m_extra_dump_files_alloced (0)
{
}

gcc::dump_manager::~dump_manager ()
{
  for (size_t i = 0; i < m_extra_dump_files_in_use; i++)
    {
      dump_file_info *dfi = &m_extra_dump_files[i];
      /* suffix, swtch, glob are statically allocated for the entries
         in dump_files, and for statistics, but are dynamically allocated
         for those for passes.  */
      if (dfi->owns_strings)
        {
          XDELETEVEC (const_cast <char *> (dfi->suffix));
          XDELETEVEC (const_cast <char *> (dfi->swtch));
          XDELETEVEC (const_cast <char *> (dfi->glob));
        }
      /* These, if non-NULL, are always dynamically allocated.  */
      XDELETEVEC (const_cast <char *> (dfi->pfilename));
      XDELETEVEC (const_cast <char *> (dfi->alt_filename));
    }
  XDELETEVEC (m_extra_dump_files);
}

unsigned int
gcc::dump_manager::
dump_register (const char *suffix, const char *swtch, const char *glob,
               dump_kind dkind, optgroup_flags_t optgroup_flags,
               bool take_ownership)
{
  int num = m_next_dump++;

  size_t count = m_extra_dump_files_in_use++;

  if (count >= m_extra_dump_files_alloced)
    {
      if (m_extra_dump_files_alloced == 0)
        m_extra_dump_files_alloced = 512;
      else
        m_extra_dump_files_alloced *= 2;
      m_extra_dump_files = XRESIZEVEC (struct dump_file_info,
                                       m_extra_dump_files,
                                       m_extra_dump_files_alloced);

      /* Construct a new object in the space allocated above.  */
      new (m_extra_dump_files + count) dump_file_info ();
    }
  else
    {
      /* Zero out the already constructed object.  */
      m_extra_dump_files[count] = dump_file_info ();
    }

  m_extra_dump_files[count].suffix = suffix;
  m_extra_dump_files[count].swtch = swtch;
  m_extra_dump_files[count].glob = glob;
  m_extra_dump_files[count].dkind = dkind;
  m_extra_dump_files[count].optgroup_flags = optgroup_flags;
  m_extra_dump_files[count].num = num;
  m_extra_dump_files[count].owns_strings = take_ownership;

  return count + TDI_end;
}


/* Allow languages and middle-end to register their dumps before the
   optimization passes.  */

void
gcc::dump_manager::
register_dumps ()
{
  lang_hooks.register_dumps (this);
  /* If this assert fails, some FE registered more than
     FIRST_ME_AUTO_NUMBERED_DUMP - FIRST_AUTO_NUMBERED_DUMP
     dump files.  Bump FIRST_ME_AUTO_NUMBERED_DUMP accordingly.  */
  gcc_assert (m_next_dump <= FIRST_ME_AUTO_NUMBERED_DUMP);
  m_next_dump = FIRST_ME_AUTO_NUMBERED_DUMP;
  dump_files[TDI_original].num = m_next_dump++;
  dump_files[TDI_gimple].num = m_next_dump++;
  dump_files[TDI_nested].num = m_next_dump++;
}


/* Return the dump_file_info for the given phase.  */

struct dump_file_info *
gcc::dump_manager::
get_dump_file_info (int phase) const
{
  if (phase < TDI_end)
    return &dump_files[phase];
  else if ((size_t) (phase - TDI_end) >= m_extra_dump_files_in_use)
    return NULL;
  else
    return m_extra_dump_files + (phase - TDI_end);
}

/* Locate the dump_file_info with swtch equal to SWTCH,
   or return NULL if no such dump_file_info exists.  */

struct dump_file_info *
gcc::dump_manager::
get_dump_file_info_by_switch (const char *swtch) const
{
  for (unsigned i = 0; i < m_extra_dump_files_in_use; i++)
    if (strcmp (m_extra_dump_files[i].swtch, swtch) == 0)
      return &m_extra_dump_files[i];

  /* Not found.  */
  return NULL;
}


/* Return the name of the dump file for the given phase.
   The caller is responsible for calling free on the returned
   buffer.
   If the dump is not enabled, returns NULL.  */

char *
gcc::dump_manager::
get_dump_file_name (int phase) const
{
  struct dump_file_info *dfi;

  if (phase == TDI_none)
    return NULL;

  dfi = get_dump_file_info (phase);

  return get_dump_file_name (dfi);
}

/* Return the name of the dump file for the given dump_file_info.
   The caller is responsible for calling free on the returned
   buffer.
   If the dump is not enabled, returns NULL.  */

char *
gcc::dump_manager::
get_dump_file_name (struct dump_file_info *dfi) const
{
  char dump_id[10];

  gcc_assert (dfi);

  if (dfi->pstate == 0)
    return NULL;

  /* If available, use the command line dump filename. */
  if (dfi->pfilename)
    return xstrdup (dfi->pfilename);

  if (dfi->num < 0)
    dump_id[0] = '\0';
  else
    {
      /* (null), LANG, TREE, RTL, IPA.  */
      char suffix = " ltri"[dfi->dkind];
      
      if (snprintf (dump_id, sizeof (dump_id), ".%03d%c", dfi->num, suffix) < 0)
        dump_id[0] = '\0';
    }

  return concat (dump_base_name, dump_id, dfi->suffix, NULL);
}

/* Open a dump file called FILENAME.  Some filenames are special and
   refer to the standard streams.  TRUNC indicates whether this is the
   first open (so the file should be truncated, rather than appended).
   An error message is emitted in the event of failure.  */

static FILE *
dump_open (const char *filename, bool trunc)
{
  if (strcmp ("stderr", filename) == 0)
    return stderr;

  if (strcmp ("stdout", filename) == 0
      || strcmp ("-", filename) == 0)
    return stdout;

  FILE *stream = fopen (filename, trunc ? "w" : "a");

  if (!stream)
    error ("could not open dump file %qs: %m", filename);
  return stream;
}

/* For a given DFI, open an alternate dump filename (which could also
   be a standard stream such as stdout/stderr). If the alternate dump
   file cannot be opened, return NULL.  */

static FILE *
dump_open_alternate_stream (struct dump_file_info *dfi)
{
  if (!dfi->alt_filename)
    return NULL;

  if (dfi->alt_stream)
    return dfi->alt_stream;

  FILE *stream = dump_open (dfi->alt_filename, dfi->alt_state < 0);

  if (stream)
    dfi->alt_state = 1;

  return stream;
}

/* Construct a dump_user_location_t from STMT (using its location and
   hotness).  */

dump_user_location_t::dump_user_location_t (gimple *stmt)
: m_count (), m_loc (UNKNOWN_LOCATION)
{
  if (stmt)
    {
      if (stmt->bb)
        m_count = stmt->bb->count;
      m_loc = gimple_location (stmt);
    }
}

/* Construct a dump_user_location_t from an RTL instruction (using its
   location and hotness).  */

dump_user_location_t::dump_user_location_t (rtx_insn *insn)
: m_count (), m_loc (UNKNOWN_LOCATION)
{
  if (insn)
    {
      basic_block bb = BLOCK_FOR_INSN (insn);
      if (bb)
        m_count = bb->count;
      m_loc = INSN_LOCATION (insn);
    }
}

/* Construct from a function declaration.  This one requires spelling out
   to avoid accidentally constructing from other kinds of tree.  */

dump_user_location_t
dump_user_location_t::from_function_decl (tree fndecl)
{
  gcc_assert (fndecl);

  // FIXME: profile count for function?
  return dump_user_location_t (profile_count (),
                               DECL_SOURCE_LOCATION (fndecl));
}

/* Print source location on DFILE if enabled.  */

static void
dump_loc (dump_flags_t dump_kind, FILE *dfile, source_location loc)
{
  if (dump_kind)
    {
      if (LOCATION_LOCUS (loc) > BUILTINS_LOCATION)
        fprintf (dfile, "%s:%d:%d: note: ", LOCATION_FILE (loc),
                 LOCATION_LINE (loc), LOCATION_COLUMN (loc));
      else if (current_function_decl)
        fprintf (dfile, "%s:%d:%d: note: ",
                 DECL_SOURCE_FILE (current_function_decl),
                 DECL_SOURCE_LINE (current_function_decl),
                 DECL_SOURCE_COLUMN (current_function_decl));
      /* Indentation based on scope depth.  */
      fprintf (dfile, "%*s", get_dump_scope_depth (), "");
    }
}

/* Dump gimple statement GS with SPC indentation spaces and
   EXTRA_DUMP_FLAGS on the dump streams if DUMP_KIND is enabled.  */

void
dump_gimple_stmt (dump_flags_t dump_kind, dump_flags_t extra_dump_flags,
                  gimple *gs, int spc)
{
  if (dump_file && (dump_kind & pflags))
    print_gimple_stmt (dump_file, gs, spc, dump_flags | extra_dump_flags);

  if (alt_dump_file && (dump_kind & alt_flags))
    print_gimple_stmt (alt_dump_file, gs, spc, dump_flags | extra_dump_flags);
}

/* Similar to dump_gimple_stmt, except additionally print source location.  */

void
dump_gimple_stmt_loc (dump_flags_t dump_kind, const dump_location_t &loc,
                      dump_flags_t extra_dump_flags, gimple *gs, int spc)
{
  location_t srcloc = loc.get_location_t ();
  if (dump_file && (dump_kind & pflags))
    {
      dump_loc (dump_kind, dump_file, srcloc);
      print_gimple_stmt (dump_file, gs, spc, dump_flags | extra_dump_flags);
    }

  if (alt_dump_file && (dump_kind & alt_flags))
    {
      dump_loc (dump_kind, alt_dump_file, srcloc);
      print_gimple_stmt (alt_dump_file, gs, spc, dump_flags | extra_dump_flags);
    }
}

/* Dump expression tree T using EXTRA_DUMP_FLAGS on dump streams if
   DUMP_KIND is enabled.  */

void
dump_generic_expr (dump_flags_t dump_kind, dump_flags_t extra_dump_flags,
                   tree t)
{
  if (dump_file && (dump_kind & pflags))
      print_generic_expr (dump_file, t, dump_flags | extra_dump_flags);

  if (alt_dump_file && (dump_kind & alt_flags))
      print_generic_expr (alt_dump_file, t, dump_flags | extra_dump_flags);
}


/* Similar to dump_generic_expr, except additionally print the source
   location.  */

void
dump_generic_expr_loc (dump_flags_t dump_kind, const dump_location_t &loc,
                       dump_flags_t extra_dump_flags, tree t)
{
  location_t srcloc = loc.get_location_t ();
  if (dump_file && (dump_kind & pflags))
    {
      dump_loc (dump_kind, dump_file, srcloc);
      print_generic_expr (dump_file, t, dump_flags | extra_dump_flags);
    }

  if (alt_dump_file && (dump_kind & alt_flags))
    {
      dump_loc (dump_kind, alt_dump_file, srcloc);
      print_generic_expr (alt_dump_file, t, dump_flags | extra_dump_flags);
    }
}

/* Output a formatted message using FORMAT on appropriate dump streams.  */

void
dump_printf (dump_flags_t dump_kind, const char *format, ...)
{
  if (dump_file && (dump_kind & pflags))
    {
      va_list ap;
      va_start (ap, format);
      vfprintf (dump_file, format, ap);
      va_end (ap);
    }

  if (alt_dump_file && (dump_kind & alt_flags))
    {
      va_list ap;
      va_start (ap, format);
      vfprintf (alt_dump_file, format, ap);
      va_end (ap);
    }
}

/* Similar to dump_printf, except source location is also printed.  */

void
dump_printf_loc (dump_flags_t dump_kind, const dump_location_t &loc,
                 const char *format, ...)
{
  location_t srcloc = loc.get_location_t ();
  if (dump_file && (dump_kind & pflags))
    {
      va_list ap;
      dump_loc (dump_kind, dump_file, srcloc);
      va_start (ap, format);
      vfprintf (dump_file, format, ap);
      va_end (ap);
    }

  if (alt_dump_file && (dump_kind & alt_flags))
    {
      va_list ap;
      dump_loc (dump_kind, alt_dump_file, srcloc);
      va_start (ap, format);
      vfprintf (alt_dump_file, format, ap);
      va_end (ap);
    }
}

/* Output VALUE in decimal to appropriate dump streams.  */

template<unsigned int N, typename C>
void
dump_dec (dump_flags_t dump_kind, const poly_int<N, C> &value)
{
  STATIC_ASSERT (poly_coeff_traits<C>::signedness >= 0);
  signop sgn = poly_coeff_traits<C>::signedness ? SIGNED : UNSIGNED;
  if (dump_file && (dump_kind & pflags))
    print_dec (value, dump_file, sgn);

  if (alt_dump_file && (dump_kind & alt_flags))
    print_dec (value, alt_dump_file, sgn);
}

template void dump_dec (dump_flags_t, const poly_uint16 &);
template void dump_dec (dump_flags_t, const poly_int64 &);
template void dump_dec (dump_flags_t, const poly_uint64 &);
template void dump_dec (dump_flags_t, const poly_offset_int &);
template void dump_dec (dump_flags_t, const poly_widest_int &);

/* The current dump scope-nesting depth.  */

static int dump_scope_depth;

/* Get the current dump scope-nesting depth.
   For use by dump_*_loc (for showing nesting via indentation).  */

unsigned int
get_dump_scope_depth ()
{
  return dump_scope_depth;
}

/* Push a nested dump scope.
   Print "=== NAME ===\n" to the dumpfile, if any, and to the -fopt-info
   destination, if any.
   Increment the scope depth.  */

void
dump_begin_scope (const char *name, const dump_location_t &loc)
{
  dump_printf_loc (MSG_NOTE, loc, "=== %s ===\n", name);
  dump_scope_depth++;
}

/* Pop a nested dump scope.  */

void
dump_end_scope ()
{
  dump_scope_depth--;
}

/* Start a dump for PHASE. Store user-supplied dump flags in
   *FLAG_PTR.  Return the number of streams opened.  Set globals
   DUMP_FILE, and ALT_DUMP_FILE to point to the opened streams, and
   set dump_flags appropriately for both pass dump stream and
   -fopt-info stream. */

int
gcc::dump_manager::
dump_start (int phase, dump_flags_t *flag_ptr)
{
  int count = 0;
  char *name;
  struct dump_file_info *dfi;
  FILE *stream;
  if (phase == TDI_none || !dump_phase_enabled_p (phase))
    return 0;

  dfi = get_dump_file_info (phase);
  name = get_dump_file_name (phase);
  if (name)
    {
      stream = dump_open (name, dfi->pstate < 0);
      if (stream)
        {
          dfi->pstate = 1;
          count++;
        }
      free (name);
      dfi->pstream = stream;
      set_dump_file (dfi->pstream);
      /* Initialize current dump flags. */
      pflags = dfi->pflags;
    }

  stream = dump_open_alternate_stream (dfi);
  if (stream)
    {
      dfi->alt_stream = stream;
      count++;
      set_alt_dump_file (dfi->alt_stream);
      /* Initialize current -fopt-info flags. */
      alt_flags = dfi->alt_flags;
    }

  if (flag_ptr)
    *flag_ptr = dfi->pflags;

  return count;
}

/* Finish a tree dump for PHASE and close associated dump streams.  Also
   reset the globals DUMP_FILE, ALT_DUMP_FILE, and DUMP_FLAGS.  */

void
gcc::dump_manager::
dump_finish (int phase)
{
  struct dump_file_info *dfi;

  if (phase < 0)
    return;
  dfi = get_dump_file_info (phase);
  if (dfi->pstream && dfi->pstream != stdout && dfi->pstream != stderr)
    fclose (dfi->pstream);

  if (dfi->alt_stream && dfi->alt_stream != stdout && dfi->alt_stream != stderr)
    fclose (dfi->alt_stream);

  dfi->alt_stream = NULL;
  dfi->pstream = NULL;
  set_dump_file (NULL);
  set_alt_dump_file (NULL);
  dump_flags = TDF_NONE;
  alt_flags = TDF_NONE;
  pflags = TDF_NONE;
}

/* Begin a tree dump for PHASE. Stores any user supplied flag in
   *FLAG_PTR and returns a stream to write to. If the dump is not
   enabled, returns NULL.
   Multiple calls will reopen and append to the dump file.  */

FILE *
dump_begin (int phase, dump_flags_t *flag_ptr)
{
  return g->get_dumps ()->dump_begin (phase, flag_ptr);
}

FILE *
gcc::dump_manager::
dump_begin (int phase, dump_flags_t *flag_ptr)
{
  char *name;
  struct dump_file_info *dfi;
  FILE *stream;

  if (phase == TDI_none || !dump_phase_enabled_p (phase))
    return NULL;

  name = get_dump_file_name (phase);
  if (!name)
    return NULL;
  dfi = get_dump_file_info (phase);

  stream = dump_open (name, dfi->pstate < 0);
  if (stream)
    dfi->pstate = 1;
  free (name);

  if (flag_ptr)
    *flag_ptr = dfi->pflags;

  /* Initialize current flags */
  pflags = dfi->pflags;
  return stream;
}

/* Returns nonzero if dump PHASE is enabled for at least one stream.
   If PHASE is TDI_tree_all, return nonzero if any dump is enabled for
   any phase.  */

int
gcc::dump_manager::
dump_phase_enabled_p (int phase) const
{
  if (phase == TDI_tree_all)
    {
      size_t i;
      for (i = TDI_none + 1; i < (size_t) TDI_end; i++)
        if (dump_files[i].pstate || dump_files[i].alt_state)
          return 1;
      for (i = 0; i < m_extra_dump_files_in_use; i++)
        if (m_extra_dump_files[i].pstate || m_extra_dump_files[i].alt_state)
          return 1;
      return 0;
    }
  else
    {
      struct dump_file_info *dfi = get_dump_file_info (phase);
      return dfi->pstate || dfi->alt_state;
    }
}

/* Returns nonzero if tree dump PHASE has been initialized.  */

int
gcc::dump_manager::
dump_initialized_p (int phase) const
{
  struct dump_file_info *dfi = get_dump_file_info (phase);
  return dfi->pstate > 0 || dfi->alt_state > 0;
}

/* Returns the switch name of PHASE.  */

const char *
dump_flag_name (int phase)
{
  return g->get_dumps ()->dump_flag_name (phase);
}

const char *
gcc::dump_manager::
dump_flag_name (int phase) const
{
  struct dump_file_info *dfi = get_dump_file_info (phase);
  return dfi->swtch;
}

/* Finish a tree dump for PHASE. STREAM is the stream created by
   dump_begin.  */

void
dump_end (int phase ATTRIBUTE_UNUSED, FILE *stream)
{
  if (stream != stderr && stream != stdout)
    fclose (stream);
}

/* Enable all tree dumps with FLAGS on FILENAME.  Return number of
   enabled tree dumps.  */

int
gcc::dump_manager::
dump_enable_all (dump_kind dkind, dump_flags_t flags, const char *filename)
{
  int n = 0;
  size_t i;

  for (i = TDI_none + 1; i < (size_t) TDI_end; i++)
    {
      if ((dump_files[i].dkind == dkind))
        {
          const char *old_filename = dump_files[i].pfilename;
          dump_files[i].pstate = -1;
          dump_files[i].pflags |= flags;
          n++;
          /* Override the existing filename.  */
          if (filename)
            {
              dump_files[i].pfilename = xstrdup (filename);
              /* Since it is a command-line provided file, which is
                 common to all the phases, use it in append mode.  */
              dump_files[i].pstate = 1;
            }
          if (old_filename && filename != old_filename)
            free (CONST_CAST (char *, old_filename));
        }
    }

  for (i = 0; i < m_extra_dump_files_in_use; i++)
    {
      if ((m_extra_dump_files[i].dkind == dkind))
        {
          const char *old_filename = m_extra_dump_files[i].pfilename;
          m_extra_dump_files[i].pstate = -1;
          m_extra_dump_files[i].pflags |= flags;
          n++;
          /* Override the existing filename.  */
          if (filename)
            {
              m_extra_dump_files[i].pfilename = xstrdup (filename);
              /* Since it is a command-line provided file, which is
                 common to all the phases, use it in append mode.  */
              m_extra_dump_files[i].pstate = 1;
            }
          if (old_filename && filename != old_filename)
            free (CONST_CAST (char *, old_filename));
        }
    }

  return n;
}

/* Enable -fopt-info dumps on all dump files matching OPTGROUP_FLAGS.
   Enable dumps with FLAGS on FILENAME.  Return the number of enabled
   dumps.  */

int
gcc::dump_manager::
opt_info_enable_passes (optgroup_flags_t optgroup_flags, dump_flags_t flags,
                        const char *filename)
{
  int n = 0;
  size_t i;

  for (i = TDI_none + 1; i < (size_t) TDI_end; i++)
    {
      if ((dump_files[i].optgroup_flags & optgroup_flags))
        {
          const char *old_filename = dump_files[i].alt_filename;
          /* Since this file is shared among different passes, it
             should be opened in append mode.  */
          dump_files[i].alt_state = 1;
          dump_files[i].alt_flags |= flags;
          n++;
          /* Override the existing filename.  */
          if (filename)
            dump_files[i].alt_filename = xstrdup (filename);
          if (old_filename && filename != old_filename)
            free (CONST_CAST (char *, old_filename));
        }
    }

  for (i = 0; i < m_extra_dump_files_in_use; i++)
    {
      if ((m_extra_dump_files[i].optgroup_flags & optgroup_flags))
        {
          const char *old_filename = m_extra_dump_files[i].alt_filename;
          /* Since this file is shared among different passes, it
             should be opened in append mode.  */
          m_extra_dump_files[i].alt_state = 1;
          m_extra_dump_files[i].alt_flags |= flags;
          n++;
          /* Override the existing filename.  */
          if (filename)
            m_extra_dump_files[i].alt_filename = xstrdup (filename);
          if (old_filename && filename != old_filename)
            free (CONST_CAST (char *, old_filename));
        }
    }

  return n;
}

/* Parse ARG as a dump switch. Return nonzero if it is, and store the
   relevant details in the dump_files array.  */

int
gcc::dump_manager::
dump_switch_p_1 (const char *arg, struct dump_file_info *dfi, bool doglob)
{
  const char *option_value;
  const char *ptr;
  dump_flags_t flags;

  if (doglob && !dfi->glob)
    return 0;

  option_value = skip_leading_substring (arg, doglob ? dfi->glob : dfi->swtch);
  if (!option_value)
    return 0;

  if (*option_value && *option_value != '-' && *option_value != '=')
    return 0;

  ptr = option_value;
  flags = TDF_NONE;

  while (*ptr)
    {
      const struct kv_pair<dump_flags_t> *option_ptr;
      const char *end_ptr;
      const char *eq_ptr;
      unsigned length;

      while (*ptr == '-')
        ptr++;
      end_ptr = strchr (ptr, '-');
      eq_ptr = strchr (ptr, '=');

      if (eq_ptr && !end_ptr)
        end_ptr = eq_ptr;

      if (!end_ptr)
        end_ptr = ptr + strlen (ptr);
      length = end_ptr - ptr;

      for (option_ptr = dump_options; option_ptr->name; option_ptr++)
        if (strlen (option_ptr->name) == length
            && !memcmp (option_ptr->name, ptr, length))
          {
            flags |= option_ptr->value;
            goto found;
          }

      if (*ptr == '=')
        {
          /* Interpret rest of the argument as a dump filename.  This
             filename overrides other command line filenames.  */
          if (dfi->pfilename)
            free (CONST_CAST (char *, dfi->pfilename));
          dfi->pfilename = xstrdup (ptr + 1);
          break;
        }
      else
        warning (0, "ignoring unknown option %q.*s in %<-fdump-%s%>",
                 length, ptr, dfi->swtch);
    found:;
      ptr = end_ptr;
    }

  dfi->pstate = -1;
  dfi->pflags |= flags;

  /* Process -fdump-tree-all and -fdump-rtl-all, by enabling all the
     known dumps.  */
  if (dfi->suffix == NULL)
    dump_enable_all (dfi->dkind, dfi->pflags, dfi->pfilename);

  return 1;
}

int
gcc::dump_manager::
dump_switch_p (const char *arg)
{
  size_t i;
  int any = 0;

  for (i = TDI_none + 1; i != TDI_end; i++)
    any |= dump_switch_p_1 (arg, &dump_files[i], false);

  /* Don't glob if we got a hit already */
  if (!any)
    for (i = TDI_none + 1; i != TDI_end; i++)
      any |= dump_switch_p_1 (arg, &dump_files[i], true);

  for (i = 0; i < m_extra_dump_files_in_use; i++)
    any |= dump_switch_p_1 (arg, &m_extra_dump_files[i], false);

  if (!any)
    for (i = 0; i < m_extra_dump_files_in_use; i++)
      any |= dump_switch_p_1 (arg, &m_extra_dump_files[i], true);


  return any;
}

/* Parse ARG as a -fopt-info switch and store flags, optgroup_flags
   and filename.  Return non-zero if it is a recognized switch.  */

static int
opt_info_switch_p_1 (const char *arg, dump_flags_t *flags,
                     optgroup_flags_t *optgroup_flags, char **filename)
{
  const char *option_value;
  const char *ptr;

  option_value = arg;
  ptr = option_value;

  *filename = NULL;
  *flags = TDF_NONE;
  *optgroup_flags = OPTGROUP_NONE;

  if (!ptr)
    return 1;       /* Handle '-fopt-info' without any additional options.  */

  while (*ptr)
    {
      const char *end_ptr;
      const char *eq_ptr;
      unsigned length;

      while (*ptr == '-')
        ptr++;
      end_ptr = strchr (ptr, '-');
      eq_ptr = strchr (ptr, '=');

      if (eq_ptr && !end_ptr)
        end_ptr = eq_ptr;

      if (!end_ptr)
        end_ptr = ptr + strlen (ptr);
      length = end_ptr - ptr;

      for (const kv_pair<dump_flags_t> *option_ptr = optinfo_verbosity_options;
           option_ptr->name; option_ptr++)
        if (strlen (option_ptr->name) == length
            && !memcmp (option_ptr->name, ptr, length))
          {
            *flags |= option_ptr->value;
            goto found;
          }

      for (const kv_pair<optgroup_flags_t> *option_ptr = optgroup_options;
           option_ptr->name; option_ptr++)
        if (strlen (option_ptr->name) == length
            && !memcmp (option_ptr->name, ptr, length))
          {
            *optgroup_flags |= option_ptr->value;
            goto found;
          }

      if (*ptr == '=')
        {
          /* Interpret rest of the argument as a dump filename.  This
             filename overrides other command line filenames.  */
          *filename = xstrdup (ptr + 1);
          break;
        }
      else
        {
          warning (0, "unknown option %q.*s in %<-fopt-info-%s%>",
                   length, ptr, arg);
          return 0;
        }
    found:;
      ptr = end_ptr;
    }

  return 1;
}

/* Return non-zero if ARG is a recognized switch for
   -fopt-info. Return zero otherwise.  */

int
opt_info_switch_p (const char *arg)
{
  dump_flags_t flags;
  optgroup_flags_t optgroup_flags;
  char *filename;
  static char *file_seen = NULL;
  gcc::dump_manager *dumps = g->get_dumps ();

  if (!opt_info_switch_p_1 (arg, &flags, &optgroup_flags, &filename))
    return 0;

  if (!filename)
    filename = xstrdup ("stderr");

  /* Bail out if a different filename has been specified.  */
  if (file_seen && strcmp (file_seen, filename))
    {
      warning (0, "ignoring possibly conflicting option %<-fopt-info-%s%>",
               arg);
      return 1;
    }

  file_seen = xstrdup (filename);
  if (!flags)
    flags = MSG_OPTIMIZED_LOCATIONS;
  if (!optgroup_flags)
    optgroup_flags = OPTGROUP_ALL;

  return dumps->opt_info_enable_passes (optgroup_flags, flags, filename);
}

/* Print basic block on the dump streams.  */

void
dump_basic_block (dump_flags_t dump_kind, basic_block bb, int indent)
{
  if (dump_file && (dump_kind & pflags))
    dump_bb (dump_file, bb, indent, TDF_DETAILS);
  if (alt_dump_file && (dump_kind & alt_flags))
    dump_bb (alt_dump_file, bb, indent, TDF_DETAILS);
}

/* Dump FUNCTION_DECL FN as tree dump PHASE.  */

void
dump_function (int phase, tree fn)
{
  FILE *stream;
  dump_flags_t flags;

  stream = dump_begin (phase, &flags);
  if (stream)
    {
      dump_function_to_file (fn, stream, flags);
      dump_end (phase, stream);
    }
}

/* Print information from the combine pass on dump_file.  */

void
print_combine_total_stats (void)
{
  if (dump_file)
    dump_combine_total_stats (dump_file);
}

/* Enable RTL dump for all the RTL passes.  */

bool
enable_rtl_dump_file (void)
{
  gcc::dump_manager *dumps = g->get_dumps ();
  int num_enabled =
    dumps->dump_enable_all (DK_rtl, dump_flags_t (TDF_DETAILS) | TDF_BLOCKS,
                            NULL);
  return num_enabled > 0;
}

#if CHECKING_P

namespace selftest {

/* Verify that the dump_location_t constructors capture the source location
   at which they were called (provided that the build compiler is sufficiently
   recent).  */

static void
test_impl_location ()
{
#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
  /* Default ctor.  */
  {
    dump_location_t loc;
    const int expected_line = __LINE__ - 1;
    ASSERT_STR_CONTAINS (loc.get_impl_location ().m_file, "dumpfile.c");
    ASSERT_EQ (loc.get_impl_location ().m_line, expected_line);
  }

  /* Constructing from a gimple.  */
  {
    dump_location_t loc ((gimple *)NULL);
    const int expected_line = __LINE__ - 1;
    ASSERT_STR_CONTAINS (loc.get_impl_location ().m_file, "dumpfile.c");
    ASSERT_EQ (loc.get_impl_location ().m_line, expected_line);
  }

  /* Constructing from an rtx_insn.  */
  {
    dump_location_t loc ((rtx_insn *)NULL);
    const int expected_line = __LINE__ - 1;
    ASSERT_STR_CONTAINS (loc.get_impl_location ().m_file, "dumpfile.c");
    ASSERT_EQ (loc.get_impl_location ().m_line, expected_line);
  }
#endif
}

/* Run all of the selftests within this file.  */

void
dumpfile_c_tests ()
{
  test_impl_location ();
}

} // namespace selftest

#endif /* CHECKING_P */