-/* Top level entry point of bison,
- Copyright (C) 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, 2004-2010 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_stats.h"
-#include "bitset.h"
-#include "getargs.h"
-#include "symtab.h"
-#include "gram.h"
-#include "files.h"
+
+#include <bitset_stats.h>
+#include <bitset.h>
+#include <configmake.h>
+#include <quotearg.h>
+#include <timevar.h>
+
+#include "LR0.h"
#include "complain.h"
+#include "conflicts.h"
#include "derives.h"
-#include "tables.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"
-
-/* The name this program was run with, for messages. */
-char *program_name;
+#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"
program_name = argv[0];
setlocale (LC_ALL, "");
(void) bindtextdomain (PACKAGE, LOCALEDIR);
+ (void) bindtextdomain ("bison-runtime", LOCALEDIR);
(void) textdomain (PACKAGE);
+ uniqstrs_new ();
+ muscle_init ();
+
getargs (argc, argv);
- time_report = trace_flag & trace_time;
+ timevar_report = trace_flag & trace_time;
init_timevar ();
timevar_start (TV_TOTAL);
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. */
timevar_pop (TV_READER);
if (complaint_issued)
- exit (EXIT_FAILURE);
+ goto finish;
/* Find useless nonterminals and productions and reduce the grammar. */
timevar_push (TV_REDUCE);
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
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);
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 ();
timevar_pop (TV_REPORT);
}
- /* Output the VCG graph. */
+ /* Output the graph. */
if (graph_flag)
{
timevar_push (TV_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 (complaint_issued)
- exit (EXIT_FAILURE);
+ goto finish;
- /* Lookaheads are no longer needed. */
+ /* Lookahead tokens are no longer needed. */
timevar_push (TV_FREE);
lalr_free ();
timevar_pop (TV_FREE);
reduce_free ();
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. */
- scanner_free ();
+ gram_scanner_free ();
muscle_free ();
- /* 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
+ uniqstrs_free ();
+ code_scanner_free ();
+ skel_scanner_free ();
+ quotearg_free ();
timevar_pop (TV_FREE);
if (trace_flag & trace_bitsets)
bitset_stats_dump (stderr);
+ finish:
+
/* Stop timing and print the times. */
timevar_stop (TV_TOTAL);
timevar_print (stderr);
- /* Some ancient SunOS versions exit (0) if main returns, so use
- `exit' to exit with nonzero status. */
- if (complaint_issued)
- exit (EXIT_FAILURE);
-
- return EXIT_SUCCESS;
+ return complaint_issued ? EXIT_FAILURE : EXIT_SUCCESS;
}
projects / bison.git / blobdiff