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/*

    		 Crown Copyright (c) 1997

    This TenDRA(r) Computer Program is subject to Copyright

    owned by the United Kingdom Secretary of State for Defence

    acting through the Defence Evaluation and Research Agency

    (DERA).  It is made available to Recipients with a

    royalty-free licence for its use, reproduction, transfer

    to other parties and amendment for any purpose not excluding

    product development provided that any such use et cetera

    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is

        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to

        show both the nature of and the organisation responsible

        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another

        party shall be deemed to be that party's acceptance of

        these conditions;

        (4) DERA gives no warranty or assurance as to its

        quality or suitability for any purpose and DERA accepts

        no liability whatsoever in relation to any use to which

        it may be put.

*/

/* 80x86/translate.c */

/**********************************************************************

$Author: release $

$Date: 1998/03/16 11:25:21 $

$Revision: 1.2 $

$Log: translate.c,v $

 * Revision 1.2  1998/03/16  11:25:21  release

 * Modifications prior to version 4.1.2.

 *

 * Revision 1.1.1.1  1998/01/17  15:55:52  release

 * First version to be checked into rolling release.

 *

 * Revision 1.25  1997/12/04  20:01:21  pwe

 * ANDF-DE V1.9

 *

 * Revision 1.24  1997/10/10  18:25:36  pwe

 * prep ANDF-DE revision

 *

 * Revision 1.23  1997/08/23  13:45:50  pwe

 * initial ANDF-DE

 *

 * Revision 1.22  1997/03/20  16:24:13  pwe

 * dwarf2

 *

 * Revision 1.21  1997/02/18  11:43:11  pwe

 * NEWDIAGS for debugging optimised code

 *

 * Revision 1.20  1996/08/01  11:11:16  pwe

 * PIC id_dec v checkext

 *

 * Revision 1.19  1996/04/19  16:14:08  pwe

 * simplified use of global id = id, correcting linux call problem

 *

 * Revision 1.18  1996/02/20  14:45:15  pwe

 * linux/elf return struct

 *

 * Revision 1.17  1996/02/01  09:34:42  pwe

 * PIC oddities for AVS

 *

 * Revision 1.16  1996/01/05  16:25:37  pwe

 * env_size and env_offset within constant expressions

 *

 * Revision 1.15  1995/12/19  13:34:22  pwe

 * PIC global idents, and static vars

 *

 * Revision 1.14  1995/12/01  16:25:37  pwe

 * correct directive re solaris proc equality

 *

 * Revision 1.13  1995/12/01  11:53:42  pwe

 * solaris proc equality

 *

 * Revision 1.12  1995/10/23  17:34:28  pwe

 * dynamic initialisation PIC, and sco diags

 *

 * Revision 1.11  1995/10/20  14:11:25  pwe

 * PIC globals

 *

 * Revision 1.10  1995/10/09  15:14:12  pwe

 * dynamic initialisation etc

 *

 * Revision 1.9  1995/09/20  12:00:27  pwe

 * svr4 and solaris initial_value, and solaris 64 bit correction

 *

 * Revision 1.8  1995/08/04  08:29:47  pwe

 * 4.0 general procs implemented

 *

 * Revision 1.7  1995/03/24  09:21:41  pwe

 * global proc renaming avoided for SCO

 *

 * Revision 1.6  1995/03/20  18:54:33  pwe

 * stabs initialisation

 *

 * Revision 1.5  1995/03/17  18:29:39  pwe

 * stabs diagnostics for solaris and linux

 *

 * Revision 1.4  1995/02/20  14:08:53  pwe

 * correct Global tag identity

 *

 * Revision 1.3  1995/02/08  13:01:21  pwe

 * Global tag identity - may need more?

 *

 * Revision 1.2  1995/01/30  12:56:57  pwe

 * Ownership -> PWE, tidy banners

 *

 * Revision 1.1  1994/10/27  14:15:22  jmf

 * Initial revision

 *

 * Revision 1.1  1994/07/12  14:43:00  jmf

 * Initial revision

 *

**********************************************************************/

#include "config.h"

#include "common_types.h"

#include "installglob.h"

#include "tags.h"

#include "exp.h"

#include "expmacs.h"

#include "optimise.h"

#include "flags.h"

#include "coder.h"

#include "shapemacs.h"

#include "instr.h"

#include "out.h"

#include "scan2.h"

#include "weights.h"

#include "instr386.h"

#include "operand.h"

#include "machine.h"

#include "codermacs.h"

#include "flpt.h"

#include "flpttypes.h"

#include "localflags.h"

#include "localtypes.h"

#include "diag_fns.h"

#include "assembler.h"

#include "cproc.h"

#include "evaluate.h"

#include "externs.h"

#include "readglob.h"

#include "tv_callees.h"

#include "basicread.h"

#ifdef NEWDWARF

#include "dw2_iface.h"

#include "dw2_config.h"

#endif

#define ptg(x) ((x)->ptf.glob)		/* addition to expmacs */

static exp delayed_const_list = nilexp;

static int const_ready

    PROTO_N ( (e) )

    PROTO_T ( exp e )

{

  unsigned char  n = name (e);

  if (n == env_size_tag)

    return (brog(son(son(e))) -> dec_u.dec_val.processed);

  if (n == env_offset_tag)

    return (name(son(e)) == 0);

  if (n == name_tag || son(e) == nilexp)

    return 1;

  e = son(e);

  while (!last(e)) {

    if (!const_ready(e))

      return 0;

    e = bro(e);

  }

  return (const_ready(e));

}

static void eval_if_ready

    PROTO_N ( (t,now) )

    PROTO_T ( exp t X int now )

{

  if (now || const_ready(son(t))) {

    if (isglob(t)) {

	dec * d = ptg(t);

	if (!writable_strings &&

	    (!isvar (t) || (d -> dec_u.dec_val.acc & f_constant)) &&

	    !PIC_code) {

          out_readonly_section();

	  outnl ();

#ifdef NEWDWARF

	  if (dwarf2)

	    note_ro (d -> dec_u.dec_val.dec_id);

#endif

	}

	else {

	  if (do_prom)

	    failer ("prom data");

	  outs (".data");

	  outnl ();

#ifdef NEWDWARF

	  if (dwarf2)

	    note_data (d -> dec_u.dec_val.dec_id);

#endif

	};

	evaluate (son(t),

                  (-1),

                  d -> dec_u.dec_val.dec_id,

		  (!isvar (t)),

                  (int)(d -> dec_u.dec_val.extnamed),

                  d -> dec_u.dec_val.diag_info);

    }

    else {

	if (!writable_strings && name (son (t)) != res_tag) {

             out_readonly_section();

	     outnl ();

	   }

	else {

	     if (do_prom)

	       failer ("prom data");

	     outs (".data");

	     outnl ();

	   };

	evaluate (son (t), no (t), (char *) 0,

	        (name (son (t)) != res_tag), 0, (diag_global*)0);

    }

    retcell (t);

  }

  else {

    bro(t) = delayed_const_list;

    delayed_const_list = t;

  }

  return;

}

/* PROCEDURES */

void make_code

    PROTO_N ( (my_def) )

    PROTO_T ( dec * my_def )

{

  exp tg = my_def -> dec_u.dec_val.dec_exp;

  char *id = my_def -> dec_u.dec_val.dec_id;

  if (son(tg) != nilexp && shape_size(sh(son(tg))) == 0 && name(son(tg)) == asm_tag) {

    ash stack;

    stack.ashsize = stack.ashalign = 0;

    if (props(son(tg)) != 0)

      failer ("~asm not in ~asm_sequence");

    check_asm_seq (son(son(tg)), 1);

    outs (".text");

    coder (zero, stack, son(tg));

    outnl ();

  }

  if (son (tg) != nilexp && (my_def -> dec_u.dec_val.extnamed || no(tg) != 0)) {

    if (name (son (tg)) == proc_tag || name (son (tg)) == general_proc_tag) {

      if (strncmp("__I.TDF", id+prefix_length, 7)==0) {

	out_initialiser (id);

	set_proc_uses_external (son (tg));	/* for PIC_code, should be done in install_fns? */

      }

      outs (".text");

      outnl ();

      if (isvar(tg)) {

        char * newid = make_local_name();

	if (my_def -> dec_u.dec_val.extnamed) {

	  my_def -> dec_u.dec_val.extnamed = 0;

	  outs(".globl ");

	  outs(id);

	  outnl();

	}

	dot_align(4);

        outs(id);

	outs(":");

	outnl();

	outlong();

	outs(newid);

	outnl();

	id = newid;

	my_def -> dec_u.dec_val.extnamed = 0;

      }

      my_def -> dec_u.dec_val.index =	/* for use in constant evaluation */

	cproc (son (tg), id, (-1), (int)(my_def -> dec_u.dec_val.extnamed),

                my_def -> dec_u.dec_val.diag_info);

      while (const_list != nilexp) {

	/* put in the constants required by the procedure */

	exp t = const_list;

	const_list = bro (const_list);

	eval_if_ready(t,0);

      };

    }

    else {			/* global values */

     diag_global * diag_props = my_def -> dec_u.dec_val.diag_info;

      if (shape_size(sh(son(tg))) == 0) {;

	if (my_def -> dec_u.dec_val.extnamed) {

	  outs(".globl ");

	  outs(id);

	  outnl();

	}

	else

	if (issol86) {

	  outs(".local ");

	  outs(id);

	  outnl();

	}

#if islinux || isfreebsd

	outs(".data");

	outnl();

	outs(id);

	outs(":");

	outnl();

#else

	outs(".set ");

	outs(id);

	outs(",");

	outn((long)0);

	outnl();

#endif

      }

      else

      if (!PIC_code && !isvar(tg) && name(son(tg)) == null_tag &&

	  name(sh(son(tg))) == prokhd) {

	if (my_def -> dec_u.dec_val.extnamed) {

	  outs(".globl ");

	  outs(id);

	  outnl();

	}

	else

	if (issol86) {

	  outs(".local ");

	  outs(id);

	  outnl();

	}

	outs(".set ");

	outs(id);

	outs(",");

	outn((long)no(son(tg)));

	outnl();

      }

      else {

      if (!my_def -> dec_u.dec_val.isweak &&

          is_comm(son(tg)))

       {

	 int is_ext = (my_def -> dec_u.dec_val.extnamed);

         if (diag_props)

#ifdef NEWDWARF

           DIAG_VAL_BEGIN (diag_props, is_ext, -1, id);

#else

           diag_val_begin(diag_props, is_ext, -1, id);

#endif

	 if (name(son(tg)) == clear_tag && no(son(tg)) == -1) {

				/* prom global data */

	   if (is_ext) {

	     outs(".globl ");

	     outs(id);

	     outnl();

	   }

           out_bss(id, sh(son(tg)));

#ifdef NEWDWARF

	   if (dwarf2)

	     note_data (id);

#endif

	 }

	 else

	 if (is_ext)

           out_dot_comm(id, sh(son(tg)));

	 else

           out_dot_lcomm(id, sh(son(tg)));

         if (diag_props) {

#ifdef NEWDWARF

           DIAG_VAL_END (diag_props);

#else

           diag_val_end(diag_props);

#endif

	 }

       }

      else {			/* global values */

	exp t = getexp (f_bottom, nilexp, 0, son(tg), nilexp, props(tg), -1, 0);

	ptg(t) = my_def;

	eval_if_ready (t, 0);

      };

     };

    };

  };

  if (son(tg) != nilexp)  {

     my_def -> dec_u.dec_val.processed = 1;

  };

  return;

}

void mark_unaliased

    PROTO_N ( (e) )

    PROTO_T ( exp e )

{

  exp p = pt (e);

  int ca = 1;

  while (p != nilexp && ca) {

#ifdef NEWDIAGS

    if ((bro(p) == nilexp ||

#else

    if (bro(p) == nilexp ||

#endif

        (!(last (p) && name (bro (p)) == cont_tag) &&

	 !(!last (p) && last (bro (p)) &&

                 name (bro (bro (p))) == ass_tag)))

#ifdef NEWDIAGS

	&& !isdiaginfo(p))

#endif

      ca = 0;

    p = pt (p);

  };

  if (ca)

    setcaonly (e);

  return;

}

void translate_capsule

    PROTO_Z ()

{

  dec * my_def;

#ifdef STABS

#ifdef NEWDWARF

  if (diagnose && !dwarf2)

#else

  if (diagnose)

#endif

    init_stab_aux ();

#endif

  my_def = top_def;

  while (my_def != (dec *) 0) {

    exp crt_exp = my_def -> dec_u.dec_val.dec_exp;

    if (PIC_code) {

      exp idval = son(crt_exp);

      if (!(my_def -> dec_u.dec_val.dec_var) &&

	   ( idval == nilexp || ( name(idval) != val_tag && name(idval) != real_tag &&

		name(idval) != null_tag )	/* optimised out in opt_all_exps/checkext */

	   ) &&

	   (name(sh(crt_exp)) != prokhd ||

		( idval != nilexp && name(idval) != null_tag &&

		  name(idval) != proc_tag && name(idval) != general_proc_tag )

	   ) )

      {

		/* make variable, and change all uses to contents */

	exp p = pt(crt_exp);

	if (my_def -> dec_u.dec_val.extnamed)

	  sh(crt_exp) = f_pointer(f_alignment(sh(crt_exp)));

	else

	  setvar(crt_exp);

	while (p != nilexp) {

	  exp np = pt(p);

	  exp* ptr = refto (father(p), p);

	  exp c = getexp (sh(p), bro(p), last(p), p, nilexp, 0, 0, cont_tag);

	  setfather (c, p);

	  if (no(p) != 0) {

	    exp r = getexp (sh(p), c, 1, p, nilexp, 0, no(p), reff_tag);

	    no(p) = 0;

	    son(c) = r;

	    setfather (r, p);

	  }

	  *ptr = c;

	  p = np;

	}

      }

    }

    else {	/* !PIC_code; make indirect global idents direct */

      exp tg = crt_exp;

      while (!isvar(tg) && son(tg) != nilexp && name(son(tg)) == name_tag && no(son(tg)) == 0)

	tg = son(son(tg));

      if (tg != crt_exp) {

	exp p = pt(crt_exp);

	while (p != nilexp) {

	  exp np = pt(p);

	  if (son(p) != crt_exp)

	    failer ("not simple name");

	  son(p) = tg;

	  pt(p) = pt(tg);

	  pt(tg) = p;

	  ++no(tg);

	  p = np;

	}

	pt(crt_exp) = nilexp;

	no(crt_exp) = 0;

      }

    };

    my_def = my_def -> def_next;

  }

  opt_all_exps ();

  transform_var_callees ();

      /* mark static unaliased */

    my_def = top_def;

    while (my_def != (dec *) 0) {

      exp crt_exp = my_def -> dec_u.dec_val.dec_exp;

      if (son (crt_exp) != nilexp &&

	  !my_def -> dec_u.dec_val.extnamed &&

   	  isvar (crt_exp))

        mark_unaliased (crt_exp);

      my_def = my_def -> def_next;

    };

  /* compile procedures, evaluate constants, put in the .comm entries for

     undefined objects */

#ifdef NEWDWARF

  if (dwarf2) {

    outs (".text\n");

    dwarf2_prelude ();

  }

#endif

  my_def = top_def;

  while (my_def != (dec *) 0) {

    if (!my_def -> dec_u.dec_val.processed)

       make_code (my_def);

    my_def = my_def -> def_next;

  };

  while (delayed_const_list != nilexp) {

    exp t = delayed_const_list;

    delayed_const_list = bro (delayed_const_list);

    eval_if_ready(t,1);

  }

  outs (".text\n");

#ifdef NEWDWARF

  if (dwarf2) {

    dwarf2_postlude ();

  }

#endif

  return;

}

void translate_tagdef

    PROTO_Z ()

{

  return;

}

void translate_unit

    PROTO_Z ()

{

  return;

}