X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/0e021770cc023c6a2e7ae132a3aab55bc7cbc058..5422d56a718805a2470558808355e04182a12d65:/src/main.c

diff --git a/src/main.c b/src/main.c
index 610d2c4e..eca261a2 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,24 +1,22 @@
 /* Top level entry point of Bison.
 
-   Copyright (C) 1984, 1986, 1989, 1992, 1995, 2000, 2001, 2002, 2004,
-   2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 1984, 1986, 1989, 1992, 1995, 2000-2002, 2004-2011 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., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include <config.h>
 #include "system.h"
@@ -37,15 +35,18 @@
 #include "getargs.h"
 #include "gram.h"
 #include "lalr.h"
-#include "muscle_tab.h"
+#include "ielr.h"
+#include "muscle-tab.h"
 #include "nullable.h"
 #include "output.h"
 #include "print.h"
 #include "print_graph.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 "tables.h"
 #include "uniqstr.h"
@@ -62,6 +63,7 @@ main (int argc, char *argv[])
   (void) textdomain (PACKAGE);
 
   uniqstrs_new ();
+  muscle_init ();
 
   getargs (argc, argv);
 
@@ -72,8 +74,6 @@ main (int argc, char *argv[])
   if (trace_flag & trace_bitsets)
     bitset_stats_enable ();
 
-  muscle_init ();
-
   /* 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.  */
@@ -97,16 +97,15 @@ main (int argc, char *argv[])
   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.  */
-  timevar_push (TV_LALR);
-  lalr ();
-  timevar_pop (TV_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
@@ -114,6 +113,15 @@ main (int argc, char *argv[])
      declarations.  */
   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);
 
@@ -122,8 +130,8 @@ main (int argc, char *argv[])
   tables_generate ();
   timevar_pop (TV_ACTIONS);
 
-  grammar_rules_never_reduced_report
-    (_("rule never reduced because of conflicts"));
+  grammar_rules_useless_report
+    (_("rule useless in parser due to conflicts"));
 
   /* Output file names. */
   compute_output_file_names ();
@@ -144,6 +152,14 @@ main (int argc, char *argv[])
       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 (complaint_issued)
@@ -175,6 +191,7 @@ main (int argc, char *argv[])
   muscle_free ();
   uniqstrs_free ();
   code_scanner_free ();
+  skel_scanner_free ();
   quotearg_free ();
   timevar_pop (TV_FREE);