384 lines
8.6 KiB
C
384 lines
8.6 KiB
C
|
/****************************************************************
|
||
|
|
Copyright 1990, 1993 by AT&T Bell Laboratories and Bellcore.
|
||
|
|
|
||
|
|
Permission to use, copy, modify, and distribute this software
|
||
|
|
and its documentation for any purpose and without fee is hereby
|
||
|
|
granted, provided that the above copyright notice appear in all
|
||
|
|
copies and that both that the copyright notice and this
|
||
|
|
permission notice and warranty disclaimer appear in supporting
|
||
|
|
documentation, and that the names of AT&T Bell Laboratories or
|
||
|
|
Bellcore or any of their entities not be used in advertising or
|
||
|
|
publicity pertaining to distribution of the software without
|
||
|
|
specific, written prior permission.
|
||
|
|
|
||
|
|
AT&T and Bellcore disclaim all warranties with regard to this
|
||
|
|
software, including all implied warranties of merchantability
|
||
|
|
and fitness. In no event shall AT&T or Bellcore be liable for
|
||
|
|
any special, indirect or consequential damages or any damages
|
||
|
|
whatsoever resulting from loss of use, data or profits, whether
|
||
|
|
in an action of contract, negligence or other tortious action,
|
||
|
|
arising out of or in connection with the use or performance of
|
||
|
|
this software.
|
||
|
|
****************************************************************/
|
||
|
|
|
||
|
|
#include "defs.h"
|
||
|
|
|
||
|
|
LOCAL eqvcommon(), eqveqv(), nsubs();
|
||
|
|
|
||
|
|
/* ROUTINES RELATED TO EQUIVALENCE CLASS PROCESSING */
|
||
|
|
|
||
|
|
/* called at end of declarations section to process chains
|
||
|
|
created by EQUIVALENCE statements
|
||
|
|
*/
|
||
|
|
doequiv()
|
||
|
|
{
|
||
|
|
register int i;
|
||
|
|
int inequiv; /* True if one namep occurs in
|
||
|
|
several EQUIV declarations */
|
||
|
|
int comno; /* Index into Extsym table of the last
|
||
|
|
COMMON block seen (implicitly assuming
|
||
|
|
that only one will be given) */
|
||
|
|
int ovarno;
|
||
|
|
ftnint comoffset; /* Index into the COMMON block */
|
||
|
|
ftnint offset; /* Offset from array base */
|
||
|
|
ftnint leng;
|
||
|
|
register struct Equivblock *equivdecl;
|
||
|
|
register struct Eqvchain *q;
|
||
|
|
struct Primblock *primp;
|
||
|
|
register Namep np;
|
||
|
|
int k, k1, ns, pref, t;
|
||
|
|
chainp cp;
|
||
|
|
extern int type_pref[];
|
||
|
|
char *s;
|
||
|
|
|
||
|
|
for(i = 0 ; i < nequiv ; ++i)
|
||
|
|
{
|
||
|
|
|
||
|
|
/* Handle each equivalence declaration */
|
||
|
|
|
||
|
|
equivdecl = &eqvclass[i];
|
||
|
|
equivdecl->eqvbottom = equivdecl->eqvtop = 0;
|
||
|
|
comno = -1;
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
for(q = equivdecl->equivs ; q ; q = q->eqvnextp)
|
||
|
|
{
|
||
|
|
offset = 0;
|
||
|
|
primp = q->eqvitem.eqvlhs;
|
||
|
|
vardcl(np = primp->namep);
|
||
|
|
if(primp->argsp || primp->fcharp)
|
||
|
|
{
|
||
|
|
expptr offp, suboffset();
|
||
|
|
|
||
|
|
/* Pad ones onto the end of an array declaration when needed */
|
||
|
|
|
||
|
|
if(np->vdim!=NULL && np->vdim->ndim>1 &&
|
||
|
|
nsubs(primp->argsp)==1 )
|
||
|
|
{
|
||
|
|
if(! ftn66flag)
|
||
|
|
warni
|
||
|
|
("1-dim subscript in EQUIVALENCE, %d-dim declared",
|
||
|
|
np -> vdim -> ndim);
|
||
|
|
cp = NULL;
|
||
|
|
ns = np->vdim->ndim;
|
||
|
|
while(--ns > 0)
|
||
|
|
cp = mkchain((char *)ICON(1), cp);
|
||
|
|
primp->argsp->listp->nextp = cp;
|
||
|
|
}
|
||
|
|
|
||
|
|
offp = suboffset(primp);
|
||
|
|
if(ISICON(offp))
|
||
|
|
offset = offp->constblock.Const.ci;
|
||
|
|
else {
|
||
|
|
dclerr
|
||
|
|
("nonconstant subscript in equivalence ",
|
||
|
|
np);
|
||
|
|
np = NULL;
|
||
|
|
}
|
||
|
|
frexpr(offp);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Free up the primblock, since we now have a hash table (Namep) entry */
|
||
|
|
|
||
|
|
frexpr((expptr)primp);
|
||
|
|
|
||
|
|
if(np && (leng = iarrlen(np))<0)
|
||
|
|
{
|
||
|
|
dclerr("adjustable in equivalence", np);
|
||
|
|
np = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(np) switch(np->vstg)
|
||
|
|
{
|
||
|
|
case STGUNKNOWN:
|
||
|
|
case STGBSS:
|
||
|
|
case STGEQUIV:
|
||
|
|
if (in_vector(np->cvarname, st_fields,
|
||
|
|
n_st_fields) >= 0) {
|
||
|
|
k = strlen(np->cvarname);
|
||
|
|
strcpy(s = mem(k+2,0), np->cvarname);
|
||
|
|
s[k] = '_';
|
||
|
|
s[k+1] = 0;
|
||
|
|
np->cvarname = s;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case STGCOMMON:
|
||
|
|
|
||
|
|
/* The code assumes that all COMMON references in a given EQUIVALENCE will
|
||
|
|
be to the same COMMON block, and will all be consistent */
|
||
|
|
|
||
|
|
comno = np->vardesc.varno;
|
||
|
|
comoffset = np->voffset + offset;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
dclerr("bad storage class in equivalence", np);
|
||
|
|
np = NULL;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(np)
|
||
|
|
{
|
||
|
|
q->eqvoffset = offset;
|
||
|
|
|
||
|
|
/* eqvbottom gets the largest difference between the array base address
|
||
|
|
and the address specified in the EQUIV declaration */
|
||
|
|
|
||
|
|
equivdecl->eqvbottom =
|
||
|
|
lmin(equivdecl->eqvbottom, -offset);
|
||
|
|
|
||
|
|
/* eqvtop gets the largest difference between the end of the array and
|
||
|
|
the address given in the EQUIVALENCE */
|
||
|
|
|
||
|
|
equivdecl->eqvtop =
|
||
|
|
lmax(equivdecl->eqvtop, leng-offset);
|
||
|
|
}
|
||
|
|
q->eqvitem.eqvname = np;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Now all equivalenced variables are in the hash table with the proper
|
||
|
|
offset, and eqvtop and eqvbottom are set. */
|
||
|
|
|
||
|
|
if(comno >= 0)
|
||
|
|
|
||
|
|
/* Get rid of all STGEQUIVS, they will be mapped onto STGCOMMON variables
|
||
|
|
*/
|
||
|
|
|
||
|
|
eqvcommon(equivdecl, comno, comoffset);
|
||
|
|
else for(q = equivdecl->equivs ; q ; q = q->eqvnextp)
|
||
|
|
{
|
||
|
|
if(np = q->eqvitem.eqvname)
|
||
|
|
{
|
||
|
|
inequiv = NO;
|
||
|
|
if(np->vstg==STGEQUIV)
|
||
|
|
if( (ovarno = np->vardesc.varno) == i)
|
||
|
|
{
|
||
|
|
|
||
|
|
/* Can't EQUIV different elements of the same array */
|
||
|
|
|
||
|
|
if(np->voffset + q->eqvoffset != 0)
|
||
|
|
dclerr
|
||
|
|
("inconsistent equivalence", np);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
offset = np->voffset;
|
||
|
|
inequiv = YES;
|
||
|
|
}
|
||
|
|
|
||
|
|
np->vstg = STGEQUIV;
|
||
|
|
np->vardesc.varno = i;
|
||
|
|
np->voffset = - q->eqvoffset;
|
||
|
|
|
||
|
|
if(inequiv)
|
||
|
|
|
||
|
|
/* Combine 2 equivalence declarations */
|
||
|
|
|
||
|
|
eqveqv(i, ovarno, q->eqvoffset + offset);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Now each equivalence declaration is distinct (all connections have been
|
||
|
|
merged in eqveqv()), and some may be empty. */
|
||
|
|
|
||
|
|
for(i = 0 ; i < nequiv ; ++i)
|
||
|
|
{
|
||
|
|
equivdecl = & eqvclass[i];
|
||
|
|
if(equivdecl->eqvbottom!=0 || equivdecl->eqvtop!=0) {
|
||
|
|
|
||
|
|
/* a live chain */
|
||
|
|
|
||
|
|
k = TYCHAR;
|
||
|
|
pref = 1;
|
||
|
|
for(q = equivdecl->equivs ; q; q = q->eqvnextp)
|
||
|
|
if ((np = q->eqvitem.eqvname)
|
||
|
|
&& !np->veqvadjust) {
|
||
|
|
np->veqvadjust = 1;
|
||
|
|
np->voffset -= equivdecl->eqvbottom;
|
||
|
|
t = typealign[k1 = np->vtype];
|
||
|
|
if (pref < type_pref[k1]) {
|
||
|
|
k = k1;
|
||
|
|
pref = type_pref[k1];
|
||
|
|
}
|
||
|
|
if(np->voffset % t != 0) {
|
||
|
|
dclerr("bad alignment forced by equivalence", np);
|
||
|
|
--nerr; /* don't give bad return code for this */
|
||
|
|
}
|
||
|
|
}
|
||
|
|
equivdecl->eqvtype = k;
|
||
|
|
}
|
||
|
|
freqchain(equivdecl);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/* put equivalence chain p at common block comno + comoffset */
|
||
|
|
|
||
|
|
LOCAL eqvcommon(p, comno, comoffset)
|
||
|
|
struct Equivblock *p;
|
||
|
|
int comno;
|
||
|
|
ftnint comoffset;
|
||
|
|
{
|
||
|
|
int ovarno;
|
||
|
|
ftnint k, offq;
|
||
|
|
register Namep np;
|
||
|
|
register struct Eqvchain *q;
|
||
|
|
|
||
|
|
if(comoffset + p->eqvbottom < 0)
|
||
|
|
{
|
||
|
|
errstr("attempt to extend common %s backward",
|
||
|
|
extsymtab[comno].fextname);
|
||
|
|
freqchain(p);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if( (k = comoffset + p->eqvtop) > extsymtab[comno].extleng)
|
||
|
|
extsymtab[comno].extleng = k;
|
||
|
|
|
||
|
|
|
||
|
|
for(q = p->equivs ; q ; q = q->eqvnextp)
|
||
|
|
if(np = q->eqvitem.eqvname)
|
||
|
|
{
|
||
|
|
switch(np->vstg)
|
||
|
|
{
|
||
|
|
case STGUNKNOWN:
|
||
|
|
case STGBSS:
|
||
|
|
np->vstg = STGCOMMON;
|
||
|
|
np->vcommequiv = 1;
|
||
|
|
np->vardesc.varno = comno;
|
||
|
|
|
||
|
|
/* np -> voffset will point to the base of the array */
|
||
|
|
|
||
|
|
np->voffset = comoffset - q->eqvoffset;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case STGEQUIV:
|
||
|
|
ovarno = np->vardesc.varno;
|
||
|
|
|
||
|
|
/* offq will point to the current element, even if it's in an array */
|
||
|
|
|
||
|
|
offq = comoffset - q->eqvoffset - np->voffset;
|
||
|
|
np->vstg = STGCOMMON;
|
||
|
|
np->vcommequiv = 1;
|
||
|
|
np->vardesc.varno = comno;
|
||
|
|
|
||
|
|
/* np -> voffset will point to the base of the array */
|
||
|
|
|
||
|
|
np->voffset += offq;
|
||
|
|
if(ovarno != (p - eqvclass))
|
||
|
|
eqvcommon(&eqvclass[ovarno], comno, offq);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case STGCOMMON:
|
||
|
|
if(comno != np->vardesc.varno ||
|
||
|
|
comoffset != np->voffset+q->eqvoffset)
|
||
|
|
dclerr("inconsistent common usage", np);
|
||
|
|
break;
|
||
|
|
|
||
|
|
|
||
|
|
default:
|
||
|
|
badstg("eqvcommon", np->vstg);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
freqchain(p);
|
||
|
|
p->eqvbottom = p->eqvtop = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* Move all items on ovarno chain to the front of nvarno chain.
|
||
|
|
* adjust offsets of ovarno elements and top and bottom of nvarno chain
|
||
|
|
*/
|
||
|
|
|
||
|
|
LOCAL eqveqv(nvarno, ovarno, delta)
|
||
|
|
int ovarno, nvarno;
|
||
|
|
ftnint delta;
|
||
|
|
{
|
||
|
|
register struct Equivblock *neweqv, *oldeqv;
|
||
|
|
register Namep np;
|
||
|
|
struct Eqvchain *q, *q1;
|
||
|
|
|
||
|
|
neweqv = eqvclass + nvarno;
|
||
|
|
oldeqv = eqvclass + ovarno;
|
||
|
|
neweqv->eqvbottom = lmin(neweqv->eqvbottom, oldeqv->eqvbottom - delta);
|
||
|
|
neweqv->eqvtop = lmax(neweqv->eqvtop, oldeqv->eqvtop - delta);
|
||
|
|
oldeqv->eqvbottom = oldeqv->eqvtop = 0;
|
||
|
|
|
||
|
|
for(q = oldeqv->equivs ; q ; q = q1)
|
||
|
|
{
|
||
|
|
q1 = q->eqvnextp;
|
||
|
|
if( (np = q->eqvitem.eqvname) && np->vardesc.varno==ovarno)
|
||
|
|
{
|
||
|
|
q->eqvnextp = neweqv->equivs;
|
||
|
|
neweqv->equivs = q;
|
||
|
|
q->eqvoffset += delta;
|
||
|
|
np->vardesc.varno = nvarno;
|
||
|
|
np->voffset -= delta;
|
||
|
|
}
|
||
|
|
else free( (charptr) q);
|
||
|
|
}
|
||
|
|
oldeqv->equivs = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
freqchain(p)
|
||
|
|
register struct Equivblock *p;
|
||
|
|
{
|
||
|
|
register struct Eqvchain *q, *oq;
|
||
|
|
|
||
|
|
for(q = p->equivs ; q ; q = oq)
|
||
|
|
{
|
||
|
|
oq = q->eqvnextp;
|
||
|
|
free( (charptr) q);
|
||
|
|
}
|
||
|
|
p->equivs = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/* nsubs -- number of subscripts in this arglist (just the length of the
|
||
|
|
list) */
|
||
|
|
|
||
|
|
LOCAL nsubs(p)
|
||
|
|
register struct Listblock *p;
|
||
|
|
{
|
||
|
|
register int n;
|
||
|
|
register chainp q;
|
||
|
|
|
||
|
|
n = 0;
|
||
|
|
if(p)
|
||
|
|
for(q = p->listp ; q ; q = q->nextp)
|
||
|
|
++n;
|
||
|
|
|
||
|
|
return(n);
|
||
|
|
}
|