projects / unix-history / blob
? search:
summary | tags | clone url | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
BSD 4 release
[unix-history] / usr / src / cmd / f77 / proc.c
#include "defs"
#include "machdefs"
#ifdef SDB
# include <a.out.h>
char *stabline();
# ifndef N_SO
# include <stab.h>
# endif
#endif
/* start a new procedure */
newproc()
{
if(parstate != OUTSIDE)
{
execerr("missing end statement", CNULL);
endproc();
}
parstate = INSIDE;
procclass = CLMAIN; /* default */
}
/* end of procedure. generate variables, epilogs, and prologs */
endproc()
{
struct Labelblock *lp;
if(parstate < INDATA)
enddcl();
if(ctlstack >= ctls)
err("DO loop or BLOCK IF not closed");
for(lp = labeltab ; lp < labtabend ; ++lp)
if(lp->stateno!=0 && lp->labdefined==NO)
errstr("missing statement number %s", convic(lp->stateno) );
epicode();
procode();
donmlist();
dobss();
prdbginfo();
#if FAMILY == PCC
putbracket();
#endif
procinit(); /* clean up for next procedure */
}
/* End of declaration section of procedure. Allocate storage. */
enddcl()
{
register struct Entrypoint *ep;
parstate = INEXEC;
docommon();
doequiv();
docomleng();
for(ep = entries ; ep ; ep = ep->entnextp)
doentry(ep);
}
\f
/* ROUTINES CALLED WHEN ENCOUNTERING ENTRY POINTS */
/* Main program or Block data */
startproc(progname, class)
struct Extsym * progname;
int class;
{
register struct Entrypoint *p;
p = ALLOC(Entrypoint);
if(class == CLMAIN)
puthead("MAIN__", CLMAIN);
else
puthead(CNULL, CLBLOCK);
if(class == CLMAIN)
newentry( mkname(5, "MAIN_") );
p->entryname = progname;
p->entrylabel = newlabel();
entries = p;
procclass = class;
retlabel = newlabel();
fprintf(diagfile, " %s", (class==CLMAIN ? "MAIN" : "BLOCK DATA") );
if(progname)
fprintf(diagfile, " %s", nounder(XL, procname = progname->extname) );
fprintf(diagfile, ":\n");
#ifdef SDB
if(sdbflag && class==CLMAIN)
{
char buff[10];
sprintf(buff, "L%d", p->entrylabel);
prstab("MAIN_", N_FUN, lineno, buff);
p2pass( stabline("MAIN_", N_FNAME, 0, 0) );
if(progname)
{
prstab(nounder(XL,progname->extname), N_ENTRY, lineno,buff);
/* p2pass(stabline(nounder(XL,progname->extname),N_FNAME,0,0)); */
}
}
#endif
}
/* subroutine or function statement */
struct Extsym *newentry(v)
register Namep v;
{
register struct Extsym *p;
p = mkext( varunder(VL, v->varname) );
if(p==NULL || p->extinit || ! ONEOF(p->extstg, M(STGUNKNOWN)|M(STGEXT)) )
{
if(p == 0)
dclerr("invalid entry name", v);
else dclerr("external name already used", v);
return(0);
}
v->vstg = STGAUTO;
v->vprocclass = PTHISPROC;
v->vclass = CLPROC;
p->extstg = STGEXT;
p->extinit = YES;
return(p);
}
entrypt(class, type, length, entry, args)
int class, type;
ftnint length;
struct Extsym *entry;
chainp args;
{
register Namep q;
register struct Entrypoint *p, *ep;
if(class != CLENTRY)
puthead( varstr(XL, procname = entry->extname), class);
if(class == CLENTRY)
fprintf(diagfile, " entry ");
fprintf(diagfile, " %s:\n", nounder(XL, entry->extname));
q = mkname(VL, nounder(XL,entry->extname) );
if( (type = lengtype(type, (int) length)) != TYCHAR)
length = 0;
if(class == CLPROC)
{
procclass = CLPROC;
proctype = type;
procleng = length;
retlabel = newlabel();
if(type == TYSUBR)
ret0label = newlabel();
}
p = ALLOC(Entrypoint);
if(entries) /* put new block at end of entries list */
{
for(ep = entries; ep->entnextp; ep = ep->entnextp)
;
ep->entnextp = p;
}
else
entries = p;
p->entryname = entry;
p->arglist = args;
p->entrylabel = newlabel();
p->enamep = q;
#ifdef SDB
if(sdbflag)
{
char buff[10];
sprintf(buff, "L%d", p->entrylabel);
prstab(nounder(XL, entry->extname),
(class==CLENTRY ? N_ENTRY : N_FUN),
lineno, buff);
if(class != CLENTRY)
p2pass( stabline( nounder(XL,entry->extname), N_FNAME, 0, 0) );
}
#endif
if(class == CLENTRY)
{
class = CLPROC;
if(proctype == TYSUBR)
type = TYSUBR;
}
q->vclass = class;
q->vprocclass = PTHISPROC;
settype(q, type, (int) length);
/* hold all initial entry points till end of declarations */
if(parstate >= INDATA)
doentry(p);
}
\f
/* generate epilogs */
LOCAL epicode()
{
register int i;
if(procclass==CLPROC)
{
if(proctype==TYSUBR)
{
putlabel(ret0label);
if(substars)
putforce(TYINT, ICON(0) );
putlabel(retlabel);
goret(TYSUBR);
}
else {
putlabel(retlabel);
if(multitype)
{
typeaddr = autovar(1, TYADDR, PNULL);
putbranch( cpexpr(typeaddr) );
for(i = 0; i < NTYPES ; ++i)
if(rtvlabel[i] != 0)
{
putlabel(rtvlabel[i]);
retval(i);
}
}
else
retval(proctype);
}
}
else if(procclass != CLBLOCK)
{
putlabel(retlabel);
goret(TYSUBR);
}
}
/* generate code to return value of type t */
LOCAL retval(t)
register int t;
{
register Addrp p;
switch(t)
{
case TYCHAR:
case TYCOMPLEX:
case TYDCOMPLEX:
break;
case TYLOGICAL:
t = tylogical;
case TYADDR:
case TYSHORT:
case TYLONG:
p = (Addrp) cpexpr(retslot);
p->vtype = t;
putforce(t, p);
break;
case TYREAL:
case TYDREAL:
p = (Addrp) cpexpr(retslot);
p->vtype = t;
putforce(t, p);
break;
default:
badtype("retval", t);
}
goret(t);
}
/* Allocate extra argument array if needed. Generate prologs. */
LOCAL procode()
{
register struct Entrypoint *p;
Addrp argvec;
#if TARGET==GCOS
argvec = autovar(lastargslot/SZADDR, TYADDR, PNULL);
#else
if(lastargslot>0 && nentry>1)
#if TARGET == VAX
argvec = autovar(1 + lastargslot/SZADDR, TYADDR, PNULL);
#else
argvec = autovar(lastargslot/SZADDR, TYADDR, PNULL);
#endif
else
argvec = NULL;
#endif
#if TARGET == PDP11
/* for the optimizer */
if(fudgelabel)
putlabel(fudgelabel);
#endif
for(p = entries ; p ; p = p->entnextp)
prolog(p, argvec);
#if FAMILY == PCC
putrbrack(procno);
#endif
prendproc();
}
\f
/*
manipulate argument lists (allocate argument slot positions)
* keep track of return types and labels
*/
LOCAL doentry(ep)
struct Entrypoint *ep;
{
register int type;
register Namep np;
chainp p;
register Namep q;
Addrp mkarg();
++nentry;
if(procclass == CLMAIN)
{
putlabel(ep->entrylabel);
return;
}
else if(procclass == CLBLOCK)
return;
impldcl( np = mkname(VL, nounder(XL, ep->entryname->extname) ) );
type = np->vtype;
if(proctype == TYUNKNOWN)
if( (proctype = type) == TYCHAR)
procleng = (np->vleng ? np->vleng->constblock.const.ci : (ftnint) (-1));
if(proctype == TYCHAR)
{
if(type != TYCHAR)
err("noncharacter entry of character function");
else if( (np->vleng ? np->vleng->constblock.const.ci : (ftnint) (-1)) != procleng)
err("mismatched character entry lengths");
}
else if(type == TYCHAR)
err("character entry of noncharacter function");
else if(type != proctype)
multitype = YES;
if(rtvlabel[type] == 0)
rtvlabel[type] = newlabel();
ep->typelabel = rtvlabel[type];
if(type == TYCHAR)
{
if(chslot < 0)
{
chslot = nextarg(TYADDR);
chlgslot = nextarg(TYLENG);
}
np->vstg = STGARG;
np->vardesc.varno = chslot;
if(procleng < 0)
np->vleng = (expptr) mkarg(TYLENG, chlgslot);
}
else if( ISCOMPLEX(type) )
{
np->vstg = STGARG;
if(cxslot < 0)
cxslot = nextarg(TYADDR);
np->vardesc.varno = cxslot;
}
else if(type != TYSUBR)
{
if(nentry == 1)
retslot = autovar(1, TYDREAL, PNULL);
np->vstg = STGAUTO;
np->voffset = retslot->memoffset->constblock.const.ci;
}
for(p = ep->arglist ; p ; p = p->nextp)
if(! (( q = (Namep) (p->datap) )->vdcldone) )
q->vardesc.varno = nextarg(TYADDR);
for(p = ep->arglist ; p ; p = p->nextp)
if(! (( q = (Namep) (p->datap) )->vdcldone) )
{
impldcl(q);
q->vdcldone = YES;
#ifdef SDB
if(sdbflag)
prstab(varstr(VL,q->varname), N_PSYM,
stabtype(q),
convic(q->vardesc.varno + ARGOFFSET) );
#endif
if(q->vtype == TYCHAR)
{
if(q->vleng == NULL) /* character*(*) */
q->vleng = (expptr)
mkarg(TYLENG, nextarg(TYLENG) );
else if(nentry == 1)
nextarg(TYLENG);
}
else if(q->vclass==CLPROC && nentry==1)
nextarg(TYLENG) ;
}
putlabel(ep->entrylabel);
}
LOCAL nextarg(type)
int type;
{
int k;
k = lastargslot;
lastargslot += typesize[type];
return(k);
}
\f
/* generate variable references */
LOCAL dobss()
{
register struct Hashentry *p;
register Namep q;
register int i;
int align;
ftnint leng, iarrl;
char *memname();
int qstg, qclass, qtype;
pruse(asmfile, USEBSS);
for(p = hashtab ; p<lasthash ; ++p)
if(q = p->varp)
{
qstg = q->vstg;
qtype = q->vtype;
qclass = q->vclass;
#ifdef SDB
if(sdbflag && qclass==CLVAR) switch(qstg)
{
case STGAUTO:
prstab(varstr(VL,q->varname), N_LSYM,
stabtype(q),
convic( - q->voffset)) ;
prstleng(q, iarrlen(q));
break;
case STGBSS:
prstab(varstr(VL,q->varname), N_LCSYM,
stabtype(q),
memname(qstg,q->vardesc.varno) );
prstleng(q, iarrlen(q));
break;
case STGINIT:
prstab(varstr(VL,q->varname), N_STSYM,
stabtype(q),
memname(qstg,q->vardesc.varno) );
prstleng(q, iarrlen(q));
break;
}
#endif
if( (qclass==CLUNKNOWN && qstg!=STGARG) ||
(qclass==CLVAR && qstg==STGUNKNOWN) )
warn1("local variable %s never used", varstr(VL,q->varname) );
else if(qclass==CLVAR && qstg==STGBSS)
{
align = (qtype==TYCHAR ? ALILONG : typealign[qtype]);
if(bssleng % align != 0)
{
bssleng = roundup(bssleng, align);
preven(align);
}
prlocvar(memname(STGBSS,q->vardesc.varno), iarrl = iarrlen(q) );
bssleng += iarrl;
}
else if(qclass==CLPROC && q->vprocclass==PEXTERNAL && qstg!=STGARG)
mkext(varunder(VL, q->varname)) ->extstg = STGEXT;
if(qclass==CLVAR && qstg!=STGARG)
{
if(q->vdim && !ISICON(q->vdim->nelt) )
dclerr("adjustable dimension on non-argument", q);
if(qtype==TYCHAR && (q->vleng==NULL || !ISICON(q->vleng)))
dclerr("adjustable leng on nonargument", q);
}
}
for(i = 0 ; i < nequiv ; ++i)
if(eqvclass[i].eqvinit==NO && (leng = eqvclass[i].eqvleng)!=0 )
{
bssleng = roundup(bssleng, ALIDOUBLE);
preven(ALIDOUBLE);
prlocvar( memname(STGEQUIV, i), leng);
bssleng += leng;
}
}
donmlist()
{
register struct Hashentry *p;
register Namep q;
pruse(asmfile, USEINIT);
for(p=hashtab; p<lasthash; ++p)
if( (q = p->varp) && q->vclass==CLNAMELIST)
namelist(q);
}
doext()
{
struct Extsym *p;
for(p = extsymtab ; p<nextext ; ++p)
prext( varstr(XL, p->extname), p->maxleng, p->extinit);
}
ftnint iarrlen(q)
register Namep q;
{
ftnint leng;
leng = typesize[q->vtype];
if(leng <= 0)
return(-1);
if(q->vdim)
if( ISICON(q->vdim->nelt) )
leng *= q->vdim->nelt->constblock.const.ci;
else return(-1);
if(q->vleng)
if( ISICON(q->vleng) )
leng *= q->vleng->constblock.const.ci;
else return(-1);
return(leng);
}
\f
/* This routine creates a static block representing the namelist.
An equivalent declaration of the structure produced is:
struct namelist
{
char namelistname[16];
struct namelistentry
{
char varname[16];
char *varaddr;
int type; # negative means -type= number of chars
struct dimensions *dimp; # null means scalar
} names[];
};
struct dimensions
{
int numberofdimensions;
int numberofelements
int baseoffset;
int span[numberofdimensions];
};
where the namelistentry list terminates with a null varname
If dimp is not null, then the corner element of the array is at
varaddr. However, the element with subscripts (i1,...,in) is at
varaddr - dimp->baseoffset + sizeoftype * (i1+span[0]*(i2+span[1]*...)
*/
namelist(np)
Namep np;
{
register chainp q;
register Namep v;
register struct Dimblock *dp;
char *memname();
int type, dimno, dimoffset;
flag bad;
preven(ALILONG);
fprintf(asmfile, LABELFMT, memname(STGINIT, np->vardesc.varno));
putstr(asmfile, varstr(VL, np->varname), 16);
dimno = ++lastvarno;
dimoffset = 0;
bad = NO;
for(q = np->varxptr.namelist ; q ; q = q->nextp)
{
vardcl( v = (Namep) (q->datap) );
type = v->vtype;
if( ONEOF(v->vstg, MSKSTATIC) )
{
preven(ALILONG);
putstr(asmfile, varstr(VL,v->varname), 16);
praddr(asmfile, v->vstg, v->vardesc.varno, v->voffset);
prconi(asmfile, TYINT,
type==TYCHAR ?
-(v->vleng->constblock.const.ci) : (ftnint) type);
if(v->vdim)
{
praddr(asmfile, STGINIT, dimno, (ftnint)dimoffset);
dimoffset += 3 + v->vdim->ndim;
}
else
praddr(asmfile, STGNULL,0,(ftnint) 0);
}
else
{
dclerr("may not appear in namelist", v);
bad = YES;
}
}
if(bad)
return;
putstr(asmfile, "", 16);
if(dimoffset > 0)
{
fprintf(asmfile, LABELFMT, memname(STGINIT,dimno));
for(q = np->varxptr.namelist ; q ; q = q->nextp)
if(dp = q->datap->nameblock.vdim)
{
int i;
prconi(asmfile, TYINT, (ftnint) (dp->ndim) );
prconi(asmfile, TYINT,
(ftnint) (dp->nelt->constblock.const.ci) );
prconi(asmfile, TYINT,
(ftnint) (dp->baseoffset->constblock.const.ci));
for(i=0; i<dp->ndim ; ++i)
prconi(asmfile, TYINT,
dp->dims[i].dimsize->constblock.const.ci);
}
}
}
\f
LOCAL docommon()
{
register struct Extsym *p;
register chainp q;
struct Dimblock *t;
expptr neltp;
register Namep v;
ftnint size;
int type;
for(p = extsymtab ; p<nextext ; ++p)
if(p->extstg==STGCOMMON)
{
#ifdef SDB
if(sdbflag)
prstab(CNULL, N_BCOMM, 0, 0);
#endif
for(q = p->extp ; q ; q = q->nextp)
{
v = (Namep) (q->datap);
if(v->vdcldone == NO)
vardcl(v);
type = v->vtype;
if(p->extleng % typealign[type] != 0)
{
dclerr("common alignment", v);
p->extleng = roundup(p->extleng, typealign[type]);
}
v->voffset = p->extleng;
v->vardesc.varno = p - extsymtab;
if(type == TYCHAR)
size = v->vleng->constblock.const.ci;
else size = typesize[type];
if(t = v->vdim)
if( (neltp = t->nelt) && ISCONST(neltp) )
size *= neltp->constblock.const.ci;
else
dclerr("adjustable array in common", v);
p->extleng += size;
#ifdef SDB
if(sdbflag)
{
prstssym(v);
prstleng(v, size);
}
#endif
}
frchain( &(p->extp) );
#ifdef SDB
if(sdbflag)
prstab(varstr(XL,p->extname), N_ECOMM, 0, 0);
#endif
}
}
LOCAL docomleng()
{
register struct Extsym *p;
for(p = extsymtab ; p < nextext ; ++p)
if(p->extstg == STGCOMMON)
{
if(p->maxleng!=0 && p->extleng!=0 && p->maxleng!=p->extleng
&& !eqn(XL,"_BLNK__ ",p->extname) )
warn1("incompatible lengths for common block %s",
nounder(XL, p->extname) );
if(p->maxleng < p->extleng)
p->maxleng = p->extleng;
p->extleng = 0;
}
}
\f
/* ROUTINES DEALING WITH AUTOMATIC AND TEMPORARY STORAGE */
frtemp(p)
Addrp p;
{
/* restore clobbered character string lengths */
if(p->vtype==TYCHAR && p->varleng!=0)
{
frexpr(p->vleng);
p->vleng = ICON(p->varleng);
}
/* put block on chain of temps to be reclaimed */
holdtemps = mkchain(p, holdtemps);
}
/* allocate an automatic variable slot */
Addrp autovar(nelt, t, lengp)
register int nelt, t;
expptr lengp;
{
ftnint leng;
register Addrp q;
if(t == TYCHAR)
if( ISICON(lengp) )
leng = lengp->constblock.const.ci;
else {
fatal("automatic variable of nonconstant length");
}
else
leng = typesize[t];
autoleng = roundup( autoleng, typealign[t]);
q = ALLOC(Addrblock);
q->tag = TADDR;
q->vtype = t;
if(t == TYCHAR)
{
q->vleng = ICON(leng);
q->varleng = leng;
}
q->vstg = STGAUTO;
q->ntempelt = nelt;
#if TARGET==PDP11 || TARGET==VAX
/* stack grows downward */
autoleng += nelt*leng;
q->memoffset = ICON( - autoleng );
#else
q->memoffset = ICON( autoleng );
autoleng += nelt*leng;
#endif
return(q);
}
Addrp mktmpn(nelt, type, lengp)
int nelt;
register int type;
expptr lengp;
{
ftnint leng;
chainp p, oldp;
register Addrp q;
if(type==TYUNKNOWN || type==TYERROR)
badtype("mktmpn", type);
if(type==TYCHAR)
if( ISICON(lengp) )
leng = lengp->constblock.const.ci;
else {
err("adjustable length");
return( errnode() );
}
/*
* if an temporary of appropriate shape is on the templist,
* remove it from the list and return it
*/
for(oldp=CHNULL, p=templist ; p ; oldp=p, p=p->nextp)
{
q = (Addrp) (p->datap);
if(q->vtype==type && q->ntempelt==nelt &&
(type!=TYCHAR || q->vleng->constblock.const.ci==leng) )
{
if(oldp)
oldp->nextp = p->nextp;
else
templist = p->nextp;
free( (charptr) p);
return(q);
}
}
q = autovar(nelt, type, lengp);
q->istemp = YES;
return(q);
}
Addrp mktemp(type, lengp)
int type;
expptr lengp;
{
return( mktmpn(1,type,lengp) );
}
\f
/* VARIOUS ROUTINES FOR PROCESSING DECLARATIONS */
struct Extsym *comblock(len, s)
register int len;
register char *s;
{
struct Extsym *p;
if(len == 0)
{
s = BLANKCOMMON;
len = strlen(s);
}
p = mkext( varunder(len, s) );
if(p->extstg == STGUNKNOWN)
p->extstg = STGCOMMON;
else if(p->extstg != STGCOMMON)
{
errstr("%s cannot be a common block name", s);
return(0);
}
return( p );
}
incomm(c, v)
struct Extsym *c;
Namep v;
{
if(v->vstg != STGUNKNOWN)
dclerr("incompatible common declaration", v);
else
{
v->vstg = STGCOMMON;
c->extp = hookup(c->extp, mkchain(v,CHNULL) );
}
}
settype(v, type, length)
register Namep v;
register int type;
register int length;
{
if(type == TYUNKNOWN)
return;
if(type==TYSUBR && v->vtype!=TYUNKNOWN && v->vstg==STGARG)
{
v->vtype = TYSUBR;
frexpr(v->vleng);
}
else if(type < 0) /* storage class set */
{
if(v->vstg == STGUNKNOWN)
v->vstg = - type;
else if(v->vstg != -type)
dclerr("incompatible storage declarations", v);
}
else if(v->vtype == TYUNKNOWN)
{
if( (v->vtype = lengtype(type, length))==TYCHAR && length>=0)
v->vleng = ICON(length);
}
else if(v->vtype!=type || (type==TYCHAR && v->vleng->constblock.const.ci!=length) )
dclerr("incompatible type declarations", v);
}
lengtype(type, length)
register int type;
register int length;
{
switch(type)
{
case TYREAL:
if(length == 8)
return(TYDREAL);
if(length == 4)
goto ret;
break;
case TYCOMPLEX:
if(length == 16)
return(TYDCOMPLEX);
if(length == 8)
goto ret;
break;
case TYSHORT:
case TYDREAL:
case TYDCOMPLEX:
case TYCHAR:
case TYUNKNOWN:
case TYSUBR:
case TYERROR:
goto ret;
case TYLOGICAL:
if(length == typesize[TYLOGICAL])
goto ret;
break;
case TYLONG:
if(length == 0)
return(tyint);
if(length == 2)
return(TYSHORT);
if(length == 4)
goto ret;
break;
default:
badtype("lengtype", type);
}
if(length != 0)
err("incompatible type-length combination");
ret:
return(type);
}
setintr(v)
register Namep v;
{
register int k;
if(v->vstg == STGUNKNOWN)
v->vstg = STGINTR;
else if(v->vstg!=STGINTR)
dclerr("incompatible use of intrinsic function", v);
if(v->vclass==CLUNKNOWN)
v->vclass = CLPROC;
if(v->vprocclass == PUNKNOWN)
v->vprocclass = PINTRINSIC;
else if(v->vprocclass != PINTRINSIC)
dclerr("invalid intrinsic declaration", v);
if(k = intrfunct(v->varname))
v->vardesc.varno = k;
else
dclerr("unknown intrinsic function", v);
}
setext(v)
register Namep v;
{
if(v->vclass == CLUNKNOWN)
v->vclass = CLPROC;
else if(v->vclass != CLPROC)
dclerr("invalid external declaration", v);
if(v->vprocclass == PUNKNOWN)
v->vprocclass = PEXTERNAL;
else if(v->vprocclass != PEXTERNAL)
dclerr("invalid external declaration", v);
}
/* create dimensions block for array variable */
setbound(v, nd, dims)
register Namep v;
int nd;
struct { expptr lb, ub; } dims[ ];
{
register expptr q, t;
register struct Dimblock *p;
int i;
if(v->vclass == CLUNKNOWN)
v->vclass = CLVAR;
else if(v->vclass != CLVAR)
{
dclerr("only variables may be arrays", v);
return;
}
v->vdim = p = (struct Dimblock *)
ckalloc( sizeof(int) + (3+2*nd)*sizeof(expptr) );
p->ndim = nd;
p->nelt = ICON(1);
for(i=0 ; i<nd ; ++i)
{
if( (q = dims[i].ub) == NULL)
{
if(i == nd-1)
{
frexpr(p->nelt);
p->nelt = NULL;
}
else
err("only last bound may be asterisk");
p->dims[i].dimsize = ICON(1);;
p->dims[i].dimexpr = NULL;
}
else
{
if(dims[i].lb)
{
q = mkexpr(OPMINUS, q, cpexpr(dims[i].lb));
q = mkexpr(OPPLUS, q, ICON(1) );
}
if( ISCONST(q) )
{
p->dims[i].dimsize = q;
p->dims[i].dimexpr = (expptr) PNULL;
}
else {
p->dims[i].dimsize = (expptr) autovar(1, tyint, PNULL);
p->dims[i].dimexpr = q;
}
if(p->nelt)
p->nelt = mkexpr(OPSTAR, p->nelt,
cpexpr(p->dims[i].dimsize) );
}
}
q = dims[nd-1].lb;
if(q == NULL)
q = ICON(1);
for(i = nd-2 ; i>=0 ; --i)
{
t = dims[i].lb;
if(t == NULL)
t = ICON(1);
if(p->dims[i].dimsize)
q = mkexpr(OPPLUS, t, mkexpr(OPSTAR, cpexpr(p->dims[i].dimsize), q) );
}
if( ISCONST(q) )
{
p->baseoffset = q;
p->basexpr = NULL;
}
else
{
p->baseoffset = (expptr) autovar(1, tyint, PNULL);
p->basexpr = q;
}
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.