//-*-c++-*-
// ====================================================================
// ====================================================================
//
// Module: optimizer.h
// $Revision: 1.2 $
// $Date: 2003/03/04 06:16:04 $
//
// Revision history:
//  14-SEP-94 - Original Version
//
// ====================================================================
//
// Copyright (C) 2000, 2001 Silicon Graphics, Inc.  All Rights Reserved.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of version 2 of the GNU General Public License as
// published by the Free Software Foundation.
//
// This program is distributed in the hope that it would be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
//
// Further, this software is distributed without any warranty that it
// is free of the rightful claim of any third person regarding
// infringement  or the like.  Any license provided herein, whether
// implied or otherwise, applies only to this software file.  Patent
// licenses, if any, provided herein do not apply to combinations of
// this program with other software, or any other product whatsoever.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
//
// Contact information:  Silicon Graphics, Inc., 1600 Amphitheatre Pky,
// Mountain View, CA 94043, or:
//
// http://www.sgi.com
//
// For further information regarding this notice, see:
//
// http://oss.sgi.com/projects/GenInfo/NoticeExplan
//
// ====================================================================
//
// Description:
//
// The external interface for the optimizer.
//
// ====================================================================
// ====================================================================


#ifndef optimizer_INCLUDED
#define optimizer_INCLUDED      "optimizer.h"

#include "opt_alias_interface.h"

/*  The phases of PREOPT */
typedef enum {
  PREOPT_PHASE,		// used for -PHASE:p
  PREOPT_LNO_PHASE,	// used for -PHASE:l
  PREOPT_DUONLY_PHASE,  // called by LNO, but will disable optimization */
  MAINOPT_PHASE,	// used for -PHASE:w
  PREOPT_IPA0_PHASE,	// called by IPL
  PREOPT_IPA1_PHASE	// called by main IPA
} PREOPT_PHASES;

typedef PREOPT_PHASES OPT_PHASE;

#ifdef __cplusplus
extern "C" {
#endif


/* Clients of the optimizer pass a WHIRL tree for the function, and
 * receive back a possibly optimized version of the tree.
 */
struct DU_MANAGER;

extern WN *Pre_Optimizer( INT32 /* PREOPT_PHASES */,  WN *, struct DU_MANAGER * , struct ALIAS_MANAGER *);

struct DU_MANAGER* Create_Du_Manager(MEM_POOL *);
void               Delete_Du_Manager(struct DU_MANAGER *, MEM_POOL *);


#ifdef __cplusplus
}
#endif
#endif /* optimizer_INCLUDED */