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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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/* 80x86/tv_callees.c */
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/**********************************************************************
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$Author: release $
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$Date: 1998/01/17 15:55:52 $
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$Revision: 1.1.1.1 $
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$Log: tv_callees.c,v $
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* Revision 1.1.1.1 1998/01/17 15:55:52 release
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* First version to be checked into rolling release.
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*
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* Revision 1.5 1995/10/18 11:24:35 pwe
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* diag struct
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*
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* Revision 1.4 1995/10/16 17:45:55 pwe
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* frame alignments
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*
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* Revision 1.3 1995/08/30 16:06:57 pwe
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* prepare exception trapping
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*
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* Revision 1.2 1995/08/14 13:54:08 pwe
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* several corrections, tail calls and error jumps
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*
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* Revision 1.1 1995/08/04 08:29:50 pwe
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* 4.0 general procs implemented
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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 "externs.h"
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#include "flags.h"
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#include "install_fns.h"
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#include "tags.h"
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#include "expmacs.h"
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#include "exp.h"
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#include "tv_callees.h"
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void transform_var_callees
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PROTO_Z ()
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/* Transforms caller arguments of general
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procs with variable callees, to appear
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like a structure whose address is
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another callee. This enables consistent
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coding without demanding a separate
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register for caller argument addressing.
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Also, record need for env_size.
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*/
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{
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dec * my_def = top_def;
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while (my_def != (dec *) 0) {
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exp tg = my_def -> dec_u.dec_val.dec_exp;
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if (son(tg) != nilexp && name(son(tg)) == general_proc_tag
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&& proc_has_vcallees(son(tg))) {
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shape pc_sh = f_pointer(f_callers_alignment(0));
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int param_offset = 0;
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exp gp_body = son(son(tg));
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exp newdec = getexp (sh(gp_body), nilexp, 1, nilexp, nilexp, 0, 0, ident_tag);
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exp newlist = nilexp;
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son(newdec) = getexp (pc_sh, nilexp, 0, nilexp, nilexp, 0, 0, formal_callee_tag);
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while (name(gp_body) == ident_tag && isparam(gp_body)
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&& name(son(gp_body)) != formal_callee_tag) {
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exp arg_id = gp_body;
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exp oldlist = pt(arg_id);
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gp_body = bro(son(gp_body));
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while (oldlist != nilexp) {
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exp this_n = oldlist;
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exp new_n = getexp (pc_sh, this_n, 1, newdec, newlist, 0, 0, name_tag);
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oldlist = pt(oldlist);
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newlist = new_n;
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no(newdec) ++;
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if (isvar(arg_id)) {
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name(this_n) = reff_tag;
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son(this_n) = new_n;
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no(this_n) += param_offset;
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}
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else {
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exp r = getexp (f_pointer(f_alignment(sh(son(arg_id)))),
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this_n, 1, new_n, nilexp, 0, no(this_n)+param_offset, reff_tag);
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bro(new_n) = r;
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name(this_n) = cont_tag;
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son(this_n) = r;
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}
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pt(this_n) = nilexp;
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}
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name(arg_id) = 0; /* This may still be accessed by env_offset.
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We need to distinguish the special case.
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*/
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no(arg_id) = param_offset;
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bro(arg_id) = nilexp;
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pt(arg_id) = nilexp;
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param_offset = rounder(param_offset + shape_size(sh(son(arg_id))), param_align);
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retcell(son(arg_id));
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son(arg_id) = nilexp;
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}
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{
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setparam (newdec); /* not var */
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setcaonly (newdec);
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bro(son(newdec)) = gp_body;
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setfather(newdec, gp_body);
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gp_body = newdec;
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}
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son(son(tg)) = gp_body;
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setfather(son(tg),gp_body);
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}
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if (son(tg) != nilexp &&
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(name(son(tg)) == proc_tag || name(son(tg)) == general_proc_tag)) {
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exp nlist = pt(tg);
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while (nlist != nilexp) {
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if (name(nlist) == name_tag && last(nlist) && bro(nlist) != nilexp &&
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name(bro(nlist)) == env_size_tag)
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set_proc_needs_envsize(son(tg));
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nlist = pt(nlist);
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}
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}
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my_def = my_def -> def_next;
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}
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return;
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}
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