rtl.def: Add comment about new option in automata_option.

2004-01-13  Vladimir Makarov  <vmakarov@redhat.com>

        * rtl.def: Add comment about new option in automata_option.

	* genautomata.c (PROGRESS_OPTION): New macro.
	(progress_flag): New global variable.
	(gen_automata_option): Process `progress'.
	(transform_insn_regexps, check_unit_distributions_to_automata,
	make_automaton, NDFA_to_DFA, build_automaton, create_automata,
	expand_automata, write_automata): Print about the progress only if
	progress_flag.  Remove fflush.
	(initiate_automaton_gen): Process command line flag `-progress'.

	* doc/md.texi: Describe the new option.

From-SVN: r75812

gcc/ChangeLog

+2004-01-13  Vladimir Makarov  <vmakarov@redhat.com>
+
+        * rtl.def: Add comment about new option in automata_option.
+	
+	* genautomata.c (PROGRESS_OPTION): New macro.
+	(progress_flag): New global variable.
+	(gen_automata_option): Process `progress'.
+	(transform_insn_regexps, check_unit_distributions_to_automata,
+	make_automaton, NDFA_to_DFA, build_automaton, create_automata,
+	expand_automata, write_automata): Print about the progress only if
+	progress_flag.  Remove fflush.
+	(initiate_automaton_gen): Process command line flag `-progress'.
+
+	* doc/md.texi: Describe the new option.
+	
 2004-01-13  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>
 
 	* cfg.c (dump_bb): Dump entry edges.

gcc/doc/md.texi

@@ -5999,6 +5999,14 @@ nondeterministic treatment means trying all alternatives, some of them
 may be rejected by reservations in the subsequent insns.  You can not
 query functional unit reservations in nondeterministic automaton
 states.
+
+@item
+@dfn{progress} means output of a progress bar showing how many states
+were generated so far for automaton being processed.  This is useful
+during debugging a @acronym{DFA} description.  If you see too many
+generated states, you could interrupt the generator of the pipeline
+hazard recognizer and try to figure out a reason for generation of the
+huge automaton.
 @end itemize
 
 As an example, consider a superscalar @acronym{RISC} machine which can

gcc/rtl.def

@@ -480,7 +480,10 @@ DEF_RTL_EXPR(DEFINE_AUTOMATON, "define_automaton", "s", 'x')
    o "w" which means generation of warning instead of error for
      non-critical errors.
 
-   o "ndfa" which makes nondeterministic finite state automata.  */
+   o "ndfa" which makes nondeterministic finite state automata.
+
+   o "progress" which means output of a progress bar showing how many
+     states were generated so far for automaton being processed.  */
 DEF_RTL_EXPR(AUTOMATA_OPTION, "automata_option", "s", 'x')
 
 /* (define_reservation string string) names reservation (the first