X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/914feea9d07b0a53ee958e8df755addb97196913..acb5895680611f8beb497b41694d9686f2932c50:/src/main.c

diff --git a/src/main.c b/src/main.c
index 5d70fa48..3dbac3a9 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,121 +1,211 @@
-/* Top level entry point of bison,
-   Copyright 1984, 1986, 1989, 1992, 1995, 2000, 2001, 2002
-   Free Software Foundation, Inc.
+/* Top level entry point of Bison.
+
+   Copyright (C) 1984, 1986, 1989, 1992, 1995, 2000-2002, 2004-2012 Free
+   Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
-   Bison is free software; you can redistribute it and/or modify
+   This program 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 2, or (at your option)
-   any later version.
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
 
-   Bison is distributed in the hope that it will be useful,
+   This program 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 Bison; see the file COPYING.  If not, write to
-   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
+#include <config.h>
 #include "system.h"
-#include "bitset.h"
-#include "getargs.h"
-#include "files.h"
+
+#include <bitset_stats.h>
+#include <bitset.h>
+#include <configmake.h>
+#include <quotearg.h>
+#include <timevar.h>
+
+#include "LR0.h"
+#include "closeout.h"
 #include "complain.h"
+#include "conflicts.h"
 #include "derives.h"
-#include "output.h"
-#include "reader.h"
+#include "files.h"
+#include "getargs.h"
+#include "gram.h"
 #include "lalr.h"
-#include "reduce.h"
+#include "ielr.h"
+#include "muscle-tab.h"
 #include "nullable.h"
+#include "output.h"
 #include "print.h"
-#include "LR0.h"
-#include "conflicts.h"
 #include "print_graph.h"
-#include "muscle_tab.h"
+#include "print-xml.h"
+#include "reader.h"
+#include "reduce.h"
+#include "scan-code.h"
+#include "scan-gram.h"
+#include "scan-skel.h"
 #include "symtab.h"
-#include "lex.h"
+#include "tables.h"
+#include "uniqstr.h"
+
 
-/* The name this program was run with, for messages.  */
-char *program_name;
 
 int
 main (int argc, char *argv[])
 {
   program_name = argv[0];
   setlocale (LC_ALL, "");
-  bindtextdomain (PACKAGE, LOCALEDIR);
-  textdomain (PACKAGE);
+  (void) bindtextdomain (PACKAGE, LOCALEDIR);
+  (void) bindtextdomain ("bison-runtime", LOCALEDIR);
+  (void) textdomain (PACKAGE);
+
+  atexit (close_stdout);
 
-  bitset_stats_init ();
+  uniqstrs_new ();
+  muscle_init ();
 
-  lineno = 0;
   getargs (argc, argv);
 
-  muscle_init ();
+  timevar_report = trace_flag & trace_time;
+  init_timevar ();
+  timevar_start (TV_TOTAL);
+
+  if (trace_flag & trace_bitsets)
+    bitset_stats_enable ();
 
   /* Read the input.  Copy some parts of it to FGUARD, FACTION, FTABLE
      and FATTRS.  In file reader.c.  The other parts are recorded in
      the grammar; see gram.h.  */
+
+  timevar_push (TV_READER);
   reader ();
-  if (complain_message_count)
-    exit (1);
+  timevar_pop (TV_READER);
+
+  if (complaint_issued)
+    goto finish;
 
   /* Find useless nonterminals and productions and reduce the grammar. */
+  timevar_push (TV_REDUCE);
   reduce_grammar ();
+  timevar_pop (TV_REDUCE);
 
   /* Record other info about the grammar.  In files derives and
      nullable.  */
-  set_derives ();
-  set_nullable ();
+  timevar_push (TV_SETS);
+  derives_compute ();
+  nullable_compute ();
+  timevar_pop (TV_SETS);
 
-  /* Convert to nondeterministic finite state machine.  In file LR0.
-     See state.h for more info.  */
+  /* Compute LR(0) parser states.  See state.h for more info.  */
+  timevar_push (TV_LR0);
   generate_states ();
+  timevar_pop (TV_LR0);
 
-  /* make it deterministic.  In file lalr.  */
-  lalr ();
+  /* Add lookahead sets to parser states.  Except when LALR(1) is
+     requested, split states to eliminate LR(1)-relative
+     inadequacies.  */
+  ielr ();
 
   /* Find and record any conflicts: places where one token of
      lookahead is not enough to disambiguate the parsing.  In file
      conflicts.  Also resolve s/r conflicts based on precedence
      declarations.  */
-  solve_conflicts ();
+  timevar_push (TV_CONFLICTS);
+  conflicts_solve ();
+  if (!muscle_percent_define_flag_if ("lr.keep-unreachable-states"))
+    {
+      state_number *old_to_new = xnmalloc (nstates, sizeof *old_to_new);
+      state_number nstates_old = nstates;
+      state_remove_unreachable_states (old_to_new);
+      lalr_update_state_numbers (old_to_new, nstates_old);
+      conflicts_update_state_numbers (old_to_new, nstates_old);
+      free (old_to_new);
+    }
   conflicts_print ();
+  timevar_pop (TV_CONFLICTS);
+
+  /* Compute the parser tables.  */
+  timevar_push (TV_ACTIONS);
+  tables_generate ();
+  timevar_pop (TV_ACTIONS);
+
+  grammar_rules_useless_report
+    (_("rule useless in parser due to conflicts"));
 
   /* Output file names. */
   compute_output_file_names ();
 
   /* Output the detailed report on the grammar.  */
-  if (verbose_flag)
-    print_results ();
+  if (report_flag)
+    {
+      timevar_push (TV_REPORT);
+      print_results ();
+      timevar_pop (TV_REPORT);
+    }
+
+  /* Output the graph.  */
+  if (graph_flag)
+    {
+      timevar_push (TV_GRAPH);
+      print_graph ();
+      timevar_pop (TV_GRAPH);
+    }
+
+  /* Output xml.  */
+  if (xml_flag)
+    {
+      timevar_push (TV_XML);
+      print_xml ();
+      timevar_pop (TV_XML);
+    }
 
   /* Stop if there were errors, to avoid trashing previous output
      files.  */
-  if (complain_message_count)
-    exit (1);
+  if (complaint_issued)
+    goto finish;
 
-  /* Output the VCG graph.  */
-  if (graph_flag)
-    print_graph ();
+  /* Lookahead tokens are no longer needed. */
+  timevar_push (TV_FREE);
+  lalr_free ();
+  timevar_pop (TV_FREE);
 
   /* Output the tables and the parser to ftable.  In file output.  */
+  timevar_push (TV_PARSER);
   output ();
+  timevar_pop (TV_PARSER);
 
+  timevar_push (TV_FREE);
+  nullable_free ();
+  derives_free ();
+  tables_free ();
+  states_free ();
   reduce_free ();
-  free_conflicts ();
-  free_nullable ();
-  free_derives ();
+  conflicts_free ();
   grammar_free ();
+  output_file_names_free ();
+
+  /* The scanner memory cannot be released right after parsing, as it
+     contains things such as user actions, prologue, epilogue etc.  */
+  gram_scanner_free ();
+  muscle_free ();
+  uniqstrs_free ();
+  code_scanner_free ();
+  skel_scanner_free ();
+  quotearg_free ();
+  timevar_pop (TV_FREE);
+
+  if (trace_flag & trace_bitsets)
+    bitset_stats_dump (stderr);
+
+ finish:
 
-  /* If using alloca.c, flush the alloca'ed memory for the benefit of
-     people running Bison as a library in IDEs.  */
-#if C_ALLOCA
-    alloca (0);
-#endif
+  /* Stop timing and print the times.  */
+  timevar_stop (TV_TOTAL);
+  timevar_print (stderr);
 
-  return complain_message_count ? EXIT_FAILURE : EXIT_SUCCESS;
+  return complaint_issued ? EXIT_FAILURE : EXIT_SUCCESS;
 }