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/*
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* Copyright (c) 2002-2006 The TenDRA Project <http://www.tendra.org/>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of The TenDRA Project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific, prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
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* IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id$
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*/
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/*
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Crown Copyright (c) 1997
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This TenDRA(r) Computer Program is subject to Copyright
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owned by the United Kingdom Secretary of State for Defence
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acting through the Defence Evaluation and Research Agency
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(DERA). It is made available to Recipients with a
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royalty-free licence for its use, reproduction, transfer
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to other parties and amendment for any purpose not excluding
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product development provided that any such use et cetera
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shall be deemed to be acceptance of the following conditions:-
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(1) Its Recipients shall ensure that this Notice is
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reproduced upon any copies or amended versions of it;
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(2) Any amended version of it shall be clearly marked to
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show both the nature of and the organisation responsible
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for the relevant amendment or amendments;
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(3) Its onward transfer from a recipient to another
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party shall be deemed to be that party's acceptance of
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these conditions;
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(4) DERA gives no warranty or assurance as to its
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quality or suitability for any purpose and DERA accepts
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no liability whatsoever in relation to any use to which
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it may be put.
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*/
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/**********************************************************************
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$Author: release $
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$Date: 1998/01/17 15:55:47 $
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$Revision: 1.1.1.1 $
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$Log: global_opt.c,v $
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* Revision 1.1.1.1 1998/01/17 15:55:47 release
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* First version to be checked into rolling release.
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*
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* Revision 1.4 1995/09/27 12:39:23 currie
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* Peters PIC code
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*
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* Revision 1.3 1995/09/19 11:51:45 currie
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* Changed name of init fn +gcc static bug
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*
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* Revision 1.2 1995/06/09 08:37:40 currie
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* loose name tag with diags
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*
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* Revision 1.1 1995/04/06 10:44:05 currie
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* Initial revision
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*
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***********************************************************************/
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#include "config.h"
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#include "common_types.h"
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#include "installglob.h"
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#include "exp.h"
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#include "expmacs.h"
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#include "tags.h"
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#include "check.h"
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#include "flags.h"
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#include "check_id.h"
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#include "const.h"
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#include "foralls.h"
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#include "shapemacs.h"
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#include "glopt.h"
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#include "inline.h"
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#include "global_opt.h"
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#include "inl_norm.h"
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#include "unroll.h"
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/* PROCEDURES */
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/***********************************************************************
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checkext examines the external definition e to see if it can be
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improved. It returns 1 if it makes a change, 0 otherwise.
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***********************************************************************/
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void
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rec_inl(exp p)
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{
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if (pt(p) != nilexp) {
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rec_inl(pt(p));
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}
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inline_exp(father(p));
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return;
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}
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void
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checkext(exp e)
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{
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exp def = son(e);
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/* if it is not used or there is no definition here, do nothing */
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if (no(e) == 0 || def == nilexp) {
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return;
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}
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if ((!PIC_code || brog(e)->dec_u.dec_val.dec_var == 0) && !isvar(e) &&
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(name(def) == val_tag || name(def) == real_tag ||
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name(def) == null_tag)) {
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while (pt(e) != nilexp) {
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/* substitute constants in */
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exp q = pt(e);
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if (bro(q) != nilexp) {
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/* can be nilexp for diags */
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exp d = copy(def);
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replace(q, d, nilexp);
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kill_exp(q, q);
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} else {
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pt(e) = pt(q);
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}
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}
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return;
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}
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return;
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}
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void
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opt_all_exps(void)
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{
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dec *my_def;
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#if 0
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/* take constant expression out of loops */
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if (do_loopconsts)
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repeat_consts();
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#endif
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if (do_unroll) {
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unroller();
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}
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my_def = top_def;
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while (my_def != (dec *)0) {
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exp crt_exp = my_def->dec_u.dec_val.dec_exp;
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checkext(crt_exp);
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glopt(my_def);
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my_def = my_def -> def_next;
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}
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normalised_inlining();
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#if 1
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/* take constant expression out of loops */
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if (do_loopconsts) {
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repeat_consts();
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}
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#endif
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/* replace indexing on loop variable by incremented pointer access */
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if (do_foralls) {
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forall_opt();
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}
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return;
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}
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