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ic.c
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/* $VER: vbcc (ic.c) $Revision: 1.65 $ */
#include "vbc.h"
#include "opt.h"
#define RNOSAVE 32 /* register does not have to be saved across call */
#define RHALF 64 /* half of a register pair was already allocated */
static char FILE_[]=__FILE__;
static IC *first_pushed;
static unsigned int opushed;
static int volatile_convert;
int do_arith(np,IC *,np,obj *);
static obj *postop_obj;
static int postop_type;
np gen_libcall(char *fname,np arg1,type *t1,np arg2,type *t2);
static void handle_reglist(regargs_list *,obj *);
static void fix_pushic(IC **pushic,IC *new)
{
IC *p=last_ic;
while(p&&p->code==FREEREG) p=p->prev;
if(new==*pushic&&new!=p){
if(DEBUG&1){
printf("pushic converted to:\n");
pric2(stdout,p);
}
*pushic=p;
}
}
#if HAVE_LIBCALLS
/* avoid calling use_libcall with illegal operands */
static char *use_libcall_wrap(int c,int t,int t2)
{
if(optflags&2)
return 0;
if(c==PMULT) c=MULT;
if((c>=OR&&c<=AND)||(c>=LSHIFT&&c<=KOMPLEMENT)||c==COMPARE||c==CONVERT||c==MINUS||c==TEST)
return use_libcall(c,t,t2);
return 0;
}
#endif
void gen_test(obj *o,int t,int branch,int label)
/* Generiert ein test o, branch label und passt auf, dass */
/* kein TEST const generiert wird. */
{
IC *new;
if(o->flags&KONST){
eval_const(&o->val,t);
if(zldeqto(vldouble,d2zld(0.0))&&zmeqto(vmax,l2zm(0L))&&zumeqto(vumax,ul2zum(0UL))){
if(branch==BEQ) branch=BRA; else branch=0;
}else{
if(branch==BNE) branch=BRA; else branch=0;
}
}else{
#if HAVE_LIBCALLS
static node n={TEST},nn={REINTERPRET};
static type nt,it={INT};
char *libname;
n.left=&nn;
n.ntyp=⁢
nn.ntyp=&nt;
nt.flags=t;
n.o=nn.o=*o;
if(libname=use_libcall_wrap(TEST,t,0)){
new=new_IC();
new->code=TEST;
new->q2.flags=new->z.flags=0;
new->typf=INT;
new->q1=gen_libcall(libname,&nn,&nt,0,0)->o;
add_IC(new);
}else{
#endif
new=new_IC();
new->code=TEST;
new->q2.flags=new->z.flags=0;
new->typf=t;
new->q1=*o;
add_IC(new);
#if HAVE_LIBCALLS
}
#endif
}
if(branch){
new=new_IC();
new->code=branch;
new->typf=label;
add_IC(new);
}
}
/* remove a freereg if a scratch register is needed more than once */
static void keep_reg(int r)
{
IC *n;
if(nocode) return;
n=last_ic;
while(n){
if(n->code==CALL&®scratch[r]){
IC *ret;
regs[r]=1;
savescratch(MOVEFROMREG,n->prev,0,&n->q1);
ret=n->next;
while(ret->code==ALLOCREG||ret->code==FREEREG)
ret=ret->next;
if(ret->code==GETRETURN){
if((ret->z.flags&(REG|DREFOBJ))==(REG|DREFOBJ)&&ret->z.reg==r)
ret->z.flags&=~REG;
}else
ret=ret->prev;
savescratch(MOVETOREG,ret,0,&n->q1);
}
if(n->code==FREEREG&&n->q1.reg==r){
remove_IC(n);
if(!nocode)
regs[r]=1;
break;
}
n=n->prev;
}
}
/* Generate code to insert a bitfield */
void insert_bitfield(obj *dest,obj *src,obj *val,int bfs,int bfo,int t,int isclear)
{
/*FIXME: shortcut beachten? */
IC *new;
obj tmp1,tmp2,tmp3;
int vmerk;
bfo=bflayout(bfo,bfs,t);
if((dest->flags®)&&!regs[dest->reg])
keep_reg(dest->reg);
new=new_IC();
new->code=AND;
new->typf=t;
new->q1=*src;
new->q1.flags&=~SCRATCH;
new->q2.flags=KONST;
gval.vmax=zmsub(zmlshift(l2zm(1L),l2zm((int)bfs)),l2zm(1L));
eval_const(&gval,MAXINT);
insert_const(&new->q2.val,t);
get_scratch(&new->z,t,0,0);
tmp1=new->z;
if((new->q1.flags&(KONST|DREFOBJ))==KONST){
calc(AND,new->typf,&new->q1.val,&new->q2.val,&new->q1.val,0);
new->code=ASSIGN;
new->q2.flags=0;
new->q2.val.vmax=sizetab[new->typf&NQ];
}
*val=tmp1;
vmerk=val->flags;
tmp1.flags&=~SCRATCH;
add_IC(new);
if(bfo!=0){
new=new_IC();
new->code=LSHIFT;
new->typf=t;
new->typf2=INT;
new->q1=tmp1;
new->q2.flags=KONST;
new->q2.val.vint=zm2zi(l2zm((long)bfo));
get_scratch(&new->z,t,0,0);
tmp3=new->z;
add_IC(new);
}else{
tmp3=tmp1;
}
if(!isclear){
new=new_IC();
new->code=AND;
new->typf=t;
new->q1=*dest;
new->q1.flags&=~SCRATCH;
new->q2.flags=KONST;
gval.vmax=zmkompl(zmlshift(zmsub(zmlshift(l2zm(1L),l2zm((int)bfs)),l2zm(1L)),l2zm((long)bfo)));
eval_const(&gval,MAXINT);
insert_const(&new->q2.val,t);
get_scratch(&new->z,t,0,0);
tmp2=new->z;
add_IC(new);
}
new=new_IC();
new->code=OR;
new->typf=t;
if(isclear)
new->q1=*dest;
else
new->q1=tmp2;
new->q2=tmp3;
new->z=*dest;
add_IC(new);
if(dest->flags&(REG|SCRATCH)) free_reg(dest->reg);
val->flags=vmerk;
}
void inline_memcpy(np z,np q,zmax size)
/* fuegt ein ASSIGN-IC ein, das memcpy(z,q,size) entspricht */
{
IC *new=new_IC();
if(!ISPOINTER(z->ntyp->flags)) {error(39);return;}
if(!ISPOINTER(q->ntyp->flags)) {error(39);return;}
if(z->flags==ADDRESS||z->flags==ADDRESSA||z->flags==ADDRESSS){
gen_IC(z,0,0);
new->z=z->left->o;
if(z->flags!=ADDRESSS&&z->left->flags==IDENTIFIER&&is_vlength(z->left->ntyp)){
/* variable length array */
new->z.flags|=DREFOBJ;
new->z.dtyp=POINTER_TYPE(z->ntyp->next);
}
}else{
gen_IC(z,0,0);
if(z->o.flags&DREFOBJ){
IC *n2=new_IC();
n2->code=ASSIGN;
n2->typf=q->ntyp->flags;
n2->q1=z->o;
get_scratch(&n2->z,z->ntyp->flags,z->ntyp->next->flags,z->ntyp);
n2->q2.flags=0;
n2->q2.val.vmax=sizetab[POINTER_TYPE(z->ntyp->next)];
new->z=n2->z;
add_IC(n2);
}else{
new->z=z->o;
}
if(new->z.flags&VARADR){
new->z.flags&=~VARADR;
}else{
new->z.flags|=DREFOBJ;
new->z.dtyp=POINTER_TYPE(z->ntyp->next);
}
}
if(z->ntyp->next->flags&VOLATILE){
if(new->z.flags&DREFOBJ)
new->z.dtyp|=PVOLATILE;
}
if(q->flags==ADDRESS||q->flags==ADDRESSA||q->flags==ADDRESSS){
gen_IC(q,0,0);
new->q1=q->left->o;
if(q->flags!=ADDRESSS&&q->left->flags==IDENTIFIER&&is_vlength(q->left->ntyp)){
/* variable length array */
new->q1.flags|=DREFOBJ;
new->q1.dtyp=POINTER_TYPE(q->ntyp->next);
}
}else{
gen_IC(q,0,0);
if(q->o.flags&DREFOBJ){
IC *n2=new_IC();
n2->code=ASSIGN;
n2->typf=q->ntyp->flags;
n2->q1=q->o;
get_scratch(&n2->z,q->ntyp->flags,q->ntyp->next->flags,q->ntyp);
n2->q2.flags=0;
n2->q2.val.vmax=sizetab[POINTER_TYPE(q->ntyp->next)];
new->q1=n2->z;
add_IC(n2);
}else{
new->q1=q->o;
}
if(new->q1.flags&VARADR){
new->q1.flags&=~VARADR;
}else{
new->q1.flags|=DREFOBJ;
new->q1.dtyp=POINTER_TYPE(q->ntyp->next);
}
}
if(q->ntyp->next->flags&VOLATILE){
if(new->q1.flags&DREFOBJ)
new->q1.dtyp|=PVOLATILE;
}
new->code=ASSIGN;
new->typf=UNSIGNED|CHAR;
new->q2.flags=0;
new->q2.val.vmax=size;
if(!zmeqto(size,Z0))
add_IC(new);
}
void add_IC(IC *new)
/* fuegt ein IC ein */
{
int code;
if(!new) return;
if(nocode) {
#ifdef HAVE_MISRA
/* removed */
#endif
/*free(new);*/ /* building a list to free later would be nice... */
return;
}
new->next=0;
new->q1.am=new->q2.am=new->z.am=0;
new->line=line; new->file=filename;
code=new->code;
if(code>=BEQ&&code<=BRA) new->q1.flags=new->q2.flags=new->z.flags=0;
if(code==ALLOCREG||code==FREEREG||code==SAVEREGS||code==RESTOREREGS) new->typf=0;
if(DEBUG&64){ pric(stdout,first_ic);printf("new\n");pric2(stdout,new);printf("-\n");}
if(new->q1.flags&VAR){
if(!new->q1.v)
ierror(0);
new->q1.v->flags|=USEDASSOURCE;
if(code==ADDRESS||(new->q1.flags&VARADR))
if(!is_vlength(new->q1.v->vtyp))
new->q1.v->flags|=USEDASADR;
new->q1.v->priority+=currentpri;
}
if(new->q2.flags&VAR){
if(!new->q2.v) ierror(0);
new->q2.v->flags|=USEDASSOURCE;
if(code==ADDRESS||(new->q2.flags&VARADR))
if(!is_vlength(new->q2.v->vtyp))
new->q2.v->flags|=USEDASADR;
new->q2.v->priority+=currentpri;
}
if(new->z.flags&VAR){
if(!new->z.v) ierror(0);
if(new->z.flags&DREFOBJ)
new->z.v->flags|=USEDASSOURCE;
else
new->z.v->flags|=USEDASDEST;
new->z.v->priority+=currentpri;
}
if(block_vla[nesting]){
/* special handling for blocks with variable-length arrays */
llist *p;
if(new->code==LABEL){
p=mymalloc(LSIZE);
p->label=new->typf;
p->next=vladeflabels[nesting];
vladeflabels[nesting]=p;
}else if(0&&new->code==BRA&&!(new->flags&LOOP_COND_TRUE)){
p=mymalloc(LSIZE);
p->label=new->typf;
p->next=vlajmplabels[nesting];
vlajmplabels[nesting]=p;
p=vladeflabels[nesting];
while(p){
if(p->label==new->typf)
break;
p=p->next;
}
if(!p){
/* label not declared in this block so far;
re-adjust stack, but store the position - label may be
declared later in the same block and adjustement must be
removed */
vlaadjust_list *vl;
IC *first;
first=last_ic;
freevl();
first=first->next;
vl=mymalloc(sizeof(*vl));
vl->branch=new;
vl->first=first;
vl->next=vlaadjusts[nesting];
vlaadjusts[nesting]=vl;
}
}
}
if(/*(c_flags_val[0].l&2)&&*/code==LABEL){
/* entfernt Spruenge zu direkt folgenden Labels */
IC *p=last_ic;
while(p){
if(p->typf==new->typf&&p->code>=BEQ&&p->code<=BRA){
IC *n;
if(p->code!=BRA){
IC *cmp=p->prev;
while(cmp&&cmp->code==FREEREG) cmp=cmp->prev;
if(cmp->code==TEST){
if(is_volatile_obj(&cmp->q1))
break;
else{
if(DEBUG&1) printf("preceding test removed\n");
remove_IC(cmp);
}
}else if(cmp->code==COMPARE){
if(is_volatile_obj(&cmp->q1)||is_volatile_obj(&cmp->q2))
break;
else{
if(DEBUG&1) printf("preceding compare removed\n");
remove_IC(cmp);
}
}else
break;
}
if(vlaadjusts[nesting]){
/* remove it from vlaadjusts-lists, if necessary */
vlaadjust_list *vl=vlaadjusts[nesting];
while(vl){
if(vl->branch==p){
IC *np=vl->branch->prev;
while(np!=vl->first->prev){
if(!np) ierror(0);
np->code=NOP;
np->q1.flags=np->q2.flags=np->z.flags=0;
np=np->prev;
}
vl->branch=0;
}
vl=vl->next;
}
}
if(DEBUG&1) printf("%s l%d deleted\n",ename[p->code],p->typf);
n=p->next;
remove_IC(p);
p=n;
}else{
if(p->code!=LABEL) break;
p=p->prev;
}
}
}
if(last_ic){
if(code==ASSIGN){
if((last_ic->z.flags&(REG|SCRATCH|DREFOBJ))==(REG|SCRATCH)&&(new->q1.flags==last_ic->z.flags)&&last_ic->z.reg==new->q1.reg/*&&last_ic->code!=CALL*/){
if(USEQ2ASZ||!(last_ic->q2.flags®)||!(new->z.flags®)||last_ic->q2.reg!=new->z.reg){
if(USEQ2ASZ||!(last_ic->q2.flags&VAR)||!(new->z.flags&VAR)||last_ic->q2.v!=new->z.v){
/* verbindet op a,b->reg,move reg->c zu op a,b->c */
/* hier fehlt aber noch Registerfreigabe */
last_ic->z=new->z;
if(DEBUG&1) printf("move and op combined\n");
if((new->q1.flags&(SCRATCH|REG))==(SCRATCH|REG)&&(new->q1.reg!=new->z.reg||!(new->z.flags®)))
free_reg(new->q1.reg);
free(new);
return;
}
}
}
if((last_ic->z.flags&(VAR|SCRATCH|DREFOBJ))==(VAR|SCRATCH)&&(new->q1.flags==last_ic->z.flags)&&last_ic->z.v==new->q1.v/*&&last_ic->code!=CALL*/){
if(USEQ2ASZ||!(last_ic->q2.flags®)||!(new->z.flags®)||last_ic->q2.reg!=new->z.reg){
if(USEQ2ASZ||!(last_ic->q2.flags&VAR)||!(new->z.flags&VAR)||last_ic->q2.v!=new->z.v){
/* verbindet op a,b->scratch,move scratch->c zu op a,b->c */
/* hier fehlt aber noch Registerfreigabe */
last_ic->z=new->z;
if(DEBUG&1) printf("move and op combined(2)\n");
/* if((new->q1.flags&(SCRATCH|REG))==(SCRATCH|REG)&&(new->q1.reg!=new->z.reg||!(new->z.flags®)))
free_reg(new->q1.reg);*/
free(new);
return;
}
}
}
}
if(last_ic->code==BRA){
if(!dontdelete&&code!=LABEL&&code!=ALLOCREG&&code!=FREEREG){
/* loescht alles nach bra bis ein Label kommt */
/* momentan noch nicht perfekt, da es bei alloc/freereg stoppt */
free(new);
#ifdef HAVE_MISRA
/* removed */
#endif
if(DEBUG&1) printf("Unreachable Statement deleted\n");
return;
}
if(last_ic->prev&&code==LABEL){
/* ersetzt bcc l1;bra l2;l1 durch b!cc l2 */
if(last_ic->prev->code>=BEQ&&last_ic->prev->code<=BGT&&new->typf==last_ic->prev->typf){
if(last_ic->next) pric2(stdout,last_ic->next);
if(DEBUG&1) printf("%s l%d;%s l%d; substituted\n",ename[last_ic->prev->code],last_ic->prev->typf,ename[last_ic->code],last_ic->typf);
if(last_ic->prev->code&1)
last_ic->prev->code--;
else
last_ic->prev->code++;
last_ic->prev->typf=last_ic->typf;
last_ic=last_ic->prev;
free(last_ic->next);
last_ic->next=new;new->prev=last_ic;
last_ic=new;
return;
}
}
}
/* }*/
new->prev=last_ic;
last_ic->next=new;
last_ic=new;
}else{
last_ic=new;first_ic=new;new->prev=0;
}
ic_count++;
#if HAVE_POF2OPT
if(((new->code==MULT)||((new->code==DIV||new->code==MOD)&&(new->typf&UNSIGNED)))&&(new->q2.flags&KONST)&&ISINT(new->typf)){
/* ersetzt mul etc. mit Zweierpotenzen */
long ln;
eval_const(&new->q2.val,new->typf);
if(zmleq(l2zm(0L),vmax)&&zumleq(ul2zum(0UL),vumax)){
if(ln=get_pof2(vumax)){
if(new->code==MOD){
vmax=zmsub(vmax,l2zm(1L));
new->code=AND;
}else{
if(new->code==DIV) new->code=RSHIFT; else new->code=LSHIFT;
vmax=l2zm(ln-1);
}
gval.vmax=vmax;
eval_const(&gval,MAXINT);
insert_const(&new->q2.val,new->typf);
new->typf2=new->typf;
}
}
}
#endif
/* Merken, on Fliesskomma benutzt wurde */
if(code!=LABEL&&(code<BEQ||code>BRA)){
if(ISFLOAT(new->typf)) float_used=1;
if(code==CONVERT&&ISFLOAT(new->typf2)) float_used=1;
}
if((new->q1.flags&(SCRATCH|REG))==(SCRATCH|REG)&&(!(new->z.flags®)||new->q1.reg!=new->z.reg))
free_reg(new->q1.reg);
if((new->q2.flags&(SCRATCH|REG))==(SCRATCH|REG)&&(!(new->z.flags®)||new->q2.reg!=new->z.reg))
free_reg(new->q2.reg);
}
np gen_libcall(char *fname,np arg1,type *t1,np arg2,type *t2)
/* generate call to a library function (emulate operation) */
{
np new;
argument_list *al=0,*t;
new=new_node();
new->flags=CALL;
new->right=0;
new->left=new_node();
new->left->flags=IDENTIFIER;
new->left->left=new->left->right=0;
new->left->identifier=add_identifier(fname,strlen(fname));
new->left->ntyp=0;
new->left->sidefx=0;
new->left->val.vmax=l2zm(0L);
new->alist=0;
if(arg1){
al=mymalloc(sizeof(*al));
if(postop_obj){
al->arg=new_node();
al->arg->o=*postop_obj;
al->arg->ntyp=new_typ();
al->arg->ntyp->flags=postop_type;
al->arg->flags=REINTERPRET;
}else
al->arg=arg1;
al->next=0;
if(t1){
np cnv=new_node();
cnv->flags=CAST;
cnv->left=arg1;
cnv->right=0;
cnv->ntyp=t1;
al->arg=cnv;
}
}
if(arg2){
t=mymalloc(sizeof(*t));
t->arg=arg2;
t->next=0;
al->next=t;
if(t2){
np cnv=new_node();
cnv->flags=CAST;
cnv->left=arg2;
cnv->right=0;
cnv->ntyp=t2;
t->arg=cnv;
}
}
new->alist=al;
/* Kann man type_expr nochmal auf die Argumente anwenden? */
if(t1||t2)
no_cast_free=1;
if(!type_expression(new,0))
ierror(0);
no_cast_free=0;
gen_IC(new,0,0);
return new;
}
void gen_IC(np p,int ltrue,int lfalse)
/* Erzeugt eine IC-Liste aus einer expression */
{
IC *new; regargs_list *rl;
if(!p) return;
if(p->flags==STRING){
Var *v=0;
if(merge_strings){
for(v=first_var[0];v;v=v->next){
if(v->vtyp->flags==ARRAY&&(v->vtyp->next->flags&STRINGCONST)&&zmleq(p->ntyp->size,v->vtyp->size)){
zmax i;const_list *cl1=p->cl,*cl2=v->clist;
for(i=Z0;!zmleq(p->ntyp->size,i)&&cl1&&cl2;cl1=cl1->next,cl2=cl2->next,i=zmadd(i,Z1)){
if(!zumeqto(zuc2zum(cl1->other->val.vuchar),zuc2zum(cl2->other->val.vuchar)))
break;
}
if(zmleq(p->ntyp->size,i)) break;
}
}
}
if(!v){
p->o.v=add_var(empty,clone_typ(p->ntyp),STATIC,p->cl);
p->o.v->flags|=DEFINED;
}else
p->o.v=v;
p->o.flags=VAR;
p->o.reg=0;
p->o.val=p->val;
return;
}
if(p->flags==LITERAL){
int sc;
if(nesting==0||(is_const(p->ntyp)&&zmeqto(p->val.vmax,l2zm(0L))))
sc=STATIC;
else
sc=AUTO;
p->o.v=add_var(empty,clone_typ(p->ntyp),sc,p->cl);
p->o.v->flags|=DEFINED;
p->o.flags=VAR;
p->o.reg=0;
p->o.val.vmax=l2zm(0L);
if(sc==AUTO)
init_local_compound(p->o.v);
return;
}
if(p->flags==IDENTIFIER){
/* p->o.v=find_var(p->identifier,0);*/
p->o.flags=VAR;
p->o.reg=0;
p->o.val=p->val;
return;
}
if(p->flags==CEXPR||p->flags==PCEXPR){
if(p->left){
if(p->left->flags==POSTINC) p->left->flags=PREINC;
if(p->left->flags==POSTDEC) p->left->flags=PREDEC;
gen_IC(p->left,0,0);
if((p->left->o.flags&(SCRATCH|REG))==(SCRATCH|REG)) free_reg(p->left->o.reg);
}
if(p->right){
if(p->right->flags==POSTINC) p->right->flags=PREINC;
if(p->right->flags==POSTDEC) p->right->flags=PREDEC;
gen_IC(p->right,0,0);
if((p->right->o.flags&(SCRATCH|REG))==(SCRATCH|REG)) free_reg(p->right->o.reg);
}
p->o.flags=KONST;
p->o.val=p->val;
p->o.reg=0;
return;
}
if(p->flags==KOMMA){
if(p->left->sidefx){
gen_IC(p->left,0,0);
if((p->left->o.flags&(SCRATCH|REG))==(SCRATCH|REG)) free_reg(p->left->o.reg);
}else if(!(p->left->ntyp->flags&VOLATILE))
error(129);
gen_IC(p->right,0,0);
p->o=p->right->o;
return;
}
if(p->flags==REINTERPRET){
if(p->left){
gen_IC(p->left,0,0);
p->o=p->left->o;
}
/* if no left, do nothing, use just object */
return;
}
if(p->flags==CAST){
gen_IC(p->left,0,0);
if((p->ntyp->flags&NQ)==VOID){
if((p->left->o.flags&(SCRATCH|REG))==(SCRATCH|REG)) free_reg(p->left->o.reg);
p->o.flags=0;
}else{
if(ISPOINTER(p->ntyp->flags)&&(p->ntyp->next->flags&VOLATILE))
volatile_convert=1;
convert(p->left,p->ntyp->flags);
if(volatile_convert){
if((p->left->o.flags&VAR)&&p->left->o.v->vtyp->next)
p->left->o.v->vtyp->next->flags|=VOLATILE;
volatile_convert=0;
}
p->o=p->left->o;
}
return;
}
if(p->flags==FIRSTELEMENT){
gen_IC(p->left,0,0);
p->o=p->left->o;
return;
}
#if HAVE_POF2OPT
if(((p->flags==MULT||p->flags==PMULT)||((p->flags==DIV||p->flags==MOD)&&(p->ntyp->flags&UNSIGNED)))&&(p->right->flags==CEXPR||p->right->flags==PCEXPR)&&ISINT(p->ntyp->flags)){
/* ersetzt mul etc. mit Zweierpotenzen */
long ln;
eval_constn(p->right);
if(zmleq(l2zm(0L),vmax)&&zumleq(ul2zum(0UL),vumax)){
if(ln=get_pof2(vumax)){
if(p->flags==MOD){
vmax=zmsub(vmax,l2zm(1L));
p->flags=AND;
}else{
if(p->flags==DIV) p->flags=RSHIFT; else p->flags=LSHIFT;
vmax=l2zm(ln-1);
}
gval.vmax=vmax;
eval_const(&gval,MAXINT);
insert_constn(p->right);
}
}
}
#endif
#if HAVE_LIBCALLS
if(!(optflags&2)){
char *libname;
if(libname=use_libcall_wrap(p->flags,p->ntyp->flags,0)){
np lc;type *t1,*t2;
if(p->flags==LSHIFT||p->flags==RSHIFT){
t1=clone_typ(p->ntyp);
t2=new_typ();
t2->flags=INT;
}else{
if(p->right){
t1=arith_typ(p->left->ntyp,p->right->ntyp);
t2=clone_typ(t1);
}else{
t1=arith_typ(p->left->ntyp,p->left->ntyp);
t2=0;
}
}
lc=gen_libcall(libname,p->left,t1,p->right,t2);
*p=*lc;
free(lc);
return;
}
}
#endif
new=new_IC();
new->typf=p->ntyp->flags;
new->q1.reg=new->q2.reg=new->z.reg=0;
new->q1.flags=new->q2.flags=new->z.flags=0;
if((p->flags>=LSHIFT&&p->flags<=MOD)||(p->flags>=OR&&p->flags<=AND)||p->flags==PMULT){
do_arith(p,new,0,0);
return;
}
if(p->flags==CONTENT){
gen_IC(p->left,0,0);
if(p->left->o.flags&VARADR){
free(new);
p->o=p->left->o;
p->o.flags&=~VARADR;
return;
}
if(!(p->left->o.flags&DREFOBJ)){
free(new);
p->o=p->left->o;
p->o.flags|=DREFOBJ;
p->o.dtyp=p->left->ntyp->flags;
}else{
if((p->left->o.flags&SCRATCH)&&p->left->o.dtyp==POINTER_TYPE(p->ntyp)){
new->z=p->left->o;
new->z.flags&=~DREFOBJ;
}else{
get_scratch(&new->z,p->left->ntyp->flags,p->ntyp->flags,p->left->ntyp);
}
new->code=ASSIGN;new->typf=POINTER_TYPE(p->ntyp);
new->q1=p->left->o;
new->q2.val.vmax=sizetab[new->typf&NQ];
p->o=new->z;
add_IC(new);
p->o.flags|=DREFOBJ;
p->o.dtyp=POINTER_TYPE(p->ntyp);
}
if(p->left->ntyp->next->flags&VOLATILE) p->o.dtyp|=PVOLATILE;
return;
}
if(p->flags==ASSIGN){
if(p->left->flags==BITFIELD){
gen_IC(p->right,0,0);
gen_IC(p->left->left,0,0);
convert(p->right,p->ntyp->flags);
insert_bitfield(&p->left->left->o,&p->right->o,&p->o,p->left->bfs,p->left->bfo,p->ntyp->flags&NU,0);
return;
}
new->code=ASSIGN;
gen_IC(p->right,0,0);
gen_IC(p->left,0,0);
convert(p->right,p->ntyp->flags);
new->q1=p->right->o;
new->z=p->left->o;
new->q2.val.vmax=szof(p->left->ntyp);
p->o=new->z;
if(!ISSCALAR(p->ntyp->flags))
new->typf2=zm2l(falign(p->ntyp));
add_IC(new);
return;
}
if(p->flags==ASSIGNOP){
/* das hier ist nicht besonders schoen */
obj o,q;IC *n;int f;char *libname;
np lc;
if(p->right->right==0){
/* sowas wie a+=0 wurde wegoptimiert */
free(new);
p->o=p->left->o;
return;
}
#if HAVE_LIBCALLS
if(libname=use_libcall_wrap(p->right->flags,p->right->ntyp->flags,(p->right->flags==LSHIFT||p->right->flags==RSHIFT)?INT:0)){
type *t1,*t2;
np a1;
gen_IC(p->left,0,0);
a1=new_node();
a1->o=p->left->o;
a1->flags=REINTERPRET;
a1->o.flags&=~SCRATCH;
a1->ntyp=clone_typ(p->left->ntyp);
t1=clone_typ(p->right->ntyp);
if(p->right->flags==LSHIFT||p->right->flags==RSHIFT){
t2=new_typ();
t2->flags=INT;
}else
t2=clone_typ(t1);
lc=gen_libcall(libname,a1/*p->right->left*/,t1,p->right->right,t2);
/**p->right=*lc;*/
o=p->left->o;
free(a1);
/*p->left=0;*/
/*free(lc);*/
}else
#endif
{
lc=0;
f=do_arith(p->right,new,p->left,&o);
if(!f) ierror(0);
if(f>1) ierror(0);
}
if((o.flags&(SCRATCH|REG))==(SCRATCH|REG)&&!regs[o.reg])
keep_reg(o.reg);
if(lc)
convert(lc,p->ntyp->flags);
else
convert(p->right,p->ntyp->flags);
if(p->left&&p->left->flags==BITFIELD){
if(lc) ierror(0);
insert_bitfield(&p->left->left->o,&p->right->o,&p->o,p->left->bfs,p->left->bfo,p->ntyp->flags&NU,0);
if((p->right->o.flags&(REG|SCRATCH))==(REG|SCRATCH)&®s[p->right->o.reg])
free_reg(p->right->o.reg);
return;
}
new=new_IC();
new->typf=p->ntyp->flags;
new->q2.flags=0;
new->code=ASSIGN;
if(lc){
new->q1=lc->o;
/*free(lc);*/
}else
new->q1=p->right->o;
new->z=o;
new->q2.val.vmax=szof(p->ntyp);
p->o=new->z;
add_IC(new);
return;
}
if(p->flags==MINUS||p->flags==KOMPLEMENT){
new->code=p->flags;
gen_IC(p->left,0,0);
convert(p->left,p->ntyp->flags);
if((p->left->o.flags&(SCRATCH|REG))==(SCRATCH|REG)&®ok(p->left->o.reg,p->ntyp->flags,0)){
new->z=p->left->o;
new->z.flags&=~DREFOBJ;
}else{
get_scratch(&new->z,p->ntyp->flags,0,p->ntyp);
}
new->q1=p->left->o;
p->o=new->z;
add_IC(new);
return;
}
if(p->flags==ADDRESS||p->flags==ADDRESSA||p->flags==ADDRESSS){
if(p->flags!=ADDRESSS&&p->left->flags==IDENTIFIER&&is_vlength(p->left->ntyp)){
gen_IC(p->left,0,0);
if(!(p->left->o.flags&VAR))
ierror(0);
free(new);
p->o=p->left->o;
return;
}
new->code=ADDRESS;
new->typf=p->left->ntyp->flags;
new->typf2=POINTER_TYPE(p->left->ntyp);
gen_IC(p->left,0,0);
if(p->left->o.flags&VAR) p->left->o.v->flags|=(USEDASSOURCE|USEDASDEST);
if(p->left->o.flags&DREFOBJ){
free(new);
p->o=p->left->o;
p->o.flags&=~DREFOBJ;
return;
}
if((p->left->o.flags&VAR)&&!(p->left->o.flags&VARADR)
&&(p->left->o.v->storage_class==EXTERN||p->left->o.v->storage_class==STATIC)){
free(new);
p->o=p->left->o;
p->o.flags|=VARADR;
return;
}
new->q1=p->left->o;
get_scratch(&new->z,POINTER_TYPE(p->ntyp->next),p->ntyp->next->flags,0);
p->o=new->z;
add_IC(new);
return;
}
if(p->flags==LAND||p->flags==LOR){
int l1,l2,l3,l4;
/* printf("%s true=%d false=%d\n",ename[p->flags],ltrue,lfalse);*/
if(ISVECTOR(p->ntyp->flags)){
do_arith(p,new,0,0);
return;
}
l1=++label;
if(!ltrue) {l2=++label;l3=++label;l4=++label;}
if(!ltrue){
if(p->flags==LAND)
gen_IC(p->left,l1,l3);
else
gen_IC(p->left,l3,l1);
}else{
if(p->flags==LAND)
gen_IC(p->left,l1,lfalse);
else
gen_IC(p->left,ltrue,l1);
}
if(p->left->o.flags!=0){
if(p->flags==LAND)
gen_test(&p->left->o,p->left->ntyp->flags,BEQ,((!ltrue)?l3:lfalse));
else
gen_test(&p->left->o,p->left->ntyp->flags,BNE,((!ltrue)?l3:ltrue));
}
gen_label(l1);
if(!ltrue){
if(p->flags==LAND)
gen_IC(p->right,l2,l3);
else
gen_IC(p->right,l3,l2);
}else
gen_IC(p->right,ltrue,lfalse);
if(p->right->o.flags!=0){
if(p->flags==LAND)
gen_test(&p->right->o,p->right->ntyp->flags,BEQ,((!ltrue)?l3:lfalse));
else
gen_test(&p->right->o,p->right->ntyp->flags,BNE,((!ltrue)?l3:ltrue));
}
if(!ltrue){
gen_label(l2);
if(p->flags==LAND) gen_cond(&p->o,0,l3,l4); else gen_cond(&p->o,1,l3,l4);
}else{
new=new_IC();
new->code=BRA;
if(p->flags==LAND) new->typf=ltrue; else new->typf=lfalse;
add_IC(new);
}
if(ltrue) p->o.flags=0;
return;
}
if(p->flags==NEGATION){
int l1,l2,l3;
if(ISVECTOR(p->ntyp->flags)){
gen_IC(p->left,0,0);
if((p->left->o.flags&(SCRATCH|REG))==(SCRATCH|REG)&®ok(p->left->o.reg,p->ntyp->flags,0)){
new->z=p->left->o;
new->z.flags&=~DREFOBJ;
}else{
get_scratch(&new->z,p->left->ntyp->flags,0,p->left->ntyp);
}
new->typf=p->left->ntyp->flags;
new->q1=p->left->o;
p->o=new->z;
new->code=NEGATION;
add_IC(new);
return;
}
if(!ltrue) {l1=++label;l2=++label;l3=++label;}
if(ltrue)
gen_IC(p->left,lfalse,ltrue);
else
gen_IC(p->left,l1,l3);
if(!p->left->o.flags){
free(new);p->o.flags=0;
}else{