Try to separate region-specific code from generic parts in the scheuler.

From-SVN: r37973

1 files changed, 72 insertions, 0 deletions

diff --git a/gcc/sched-int.h b/gcc/sched-int.h
new file mode 100644
index 00000000000..bf14faa4ca2
--- /dev/null
+++ b/gcc/sched-int.h
@@ -0,0 +1,72 @@
+/* Instruction scheduling pass.  This file contains definitions used
+   internally in the scheduler.
+   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+   1999, 2000 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC 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.
+
+GNU CC 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 GNU CC; see the file COPYING.  If not, write to the Free
+the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.  */
+
+/* Forward declaration.  */
+struct ready_list;
+
+/* This structure holds some state of the current scheduling pass, and
+   contains some function pointers that abstract out some of the non-generic
+   functionality from functions such as schedule_block or schedule_insn.
+   There is one global variable, current_sched_info, which points to the
+   sched_info structure currently in use.  */
+struct sched_info
+{
+  /* Add all insns that are initially ready to the ready list.  Called once
+     before scheduling a set of insns.  */
+  void (*init_ready_list) PARAMS ((struct ready_list *));
+  /* Called after taking an insn from the ready list.  Returns nonzero if
+     this insn can be scheduled, nonzero if we should silently discard it.  */
+  int (*can_schedule_ready_p) PARAMS ((rtx));
+  /* Return nonzero if there are more insns that should be scheduled.  */
+  int (*schedule_more_p) PARAMS ((void));
+  /* Called after an insn has all its dependencies resolved.  Return nonzero
+     if it should be moved to the ready list or the queue, or zero if we
+     should silently discard it.  */
+  int (*new_ready) PARAMS ((rtx));
+  /* Compare priority of two insns.  Return a positive number if the second
+     insn is to be preferred for scheduling, and a negative one if the first
+     is to be preferred.  Zero if they are equally good.  */
+  int (*rank) PARAMS ((rtx, rtx));
+  /* Return a string that contains the insn uid and optionally anything else
+     necessary to identify this insn in an output.  It's valid to use a
+     static buffer for this.  The ALIGNED parameter should cause the string
+     to be formatted so that multiple output lines will line up nicely.  */
+  const char *(*print_insn) PARAMS ((rtx, int));
+
+  /* The boundaries of the set of insns to be scheduled.  */
+  rtx prev_head, next_tail;
+
+  /* Filled in after the schedule is finished; the first and last scheduled
+     insns.  */
+  rtx head, tail;
+
+  /* If nonzero, enables an additional sanity check in schedule_block.  */
+  int queue_must_finish_empty;
+};
+
+#ifndef __GNUC__
+#define __inline
+#endif
+
+#ifndef HAIFA_INLINE
+#define HAIFA_INLINE __inline
+#endif