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icn.c
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icn.c
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/* $VER: vbcc (ic.c) V0.8 */
#include "vbc.h"
static char FILE_[]=__FILE__;
static struct IC *first_pushed;
static unsigned int opushed;
static int volatile_convert;
int do_arith(np,struct IC *,np,struct obj *);
static void handle_reglist(struct regargs_list *,struct obj *);
void gen_test(struct obj *o,int t,int branch,int label)
/* Generiert ein test o, branch label und passt auf, dass */
/* kein TEST const generiert wird. */
{
struct 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{
new=new_IC();
new->code=TEST;
new->q2.flags=new->z.flags=0;
new->typf=t;
new->q1=*o;
add_IC(new);
}
if(branch){
new=new_IC();
new->code=branch;
new->typf=label;
add_IC(new);
}
}
void inline_memcpy(np z,np q,zmax size)
/* fuegt ein ASSIGN-IC ein, das memcpy(z,q,size) entspricht */
{
struct IC *new=new_IC();
if(!ISPOINTER(z->ntyp->flags)) ierror(0);
if(!ISPOINTER(q->ntyp->flags)) ierror(0);
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){
struct 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(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){
struct 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);
}
}
new->code=ASSIGN;
new->typf=UNSIGNED|CHAR;
new->q2.flags=0;
new->q2.val.vmax=size;
add_IC(new);
}
void add_IC(struct IC *new)
/* fuegt ein IC ein */
{
int code;
if(!new) return;
if(nocode) {
#ifdef HAVE_MISRA
misra_neu(52,14,1,-1);
#endif
free(new);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 */
struct 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 */
struct vlaadjust_list *vl;
struct 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 */
struct IC *p=last_ic;
while(p){
if(p->typf==new->typf&&p->code>=BEQ&&p->code<=BRA){
struct IC *n;
if(p->code!=BRA){
struct 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 */
struct vlaadjust_list *vl=vlaadjusts[nesting];
while(vl){
if(vl->branch==p){
struct 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(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
misra_neu(52,14,1,-1);
#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++;
/* 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->q1.reg!=new->z.reg||!(new->z.flags®)))
free_reg(new->q1.reg);
if((new->q2.flags&(SCRATCH|REG))==(SCRATCH|REG)&&(new->q2.reg!=new->z.reg||!(new->z.flags®)))
free_reg(new->q2.reg);
}
np gen_libcall(char *fname,np arg1,struct Typ *t1,np arg2,struct Typ *t2)
/* generate call to a library function (emulate operation) */
{
np new;
struct argument_list *al=0,*t;
new=mymalloc(NODES);
new->flags=CALL;
new->right=0;
new->left=mymalloc(NODES);
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));
al->arg=arg1;
al->next=0;
if(t1){
np cnv=mymalloc(NODES);
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=mymalloc(NODES);
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(!type_expression(new))
ierror(0);
gen_IC(new,0,0);
return new;
}
void gen_IC(np p,int ltrue,int lfalse)
/* Erzeugt eine IC-Liste aus einer expression */
{
struct IC *new; struct regargs_list *rl;
if(!p) return;
if(p->flags==STRING){
/* hier fehlt noch die Verwaltung der String-Inhalte */
p->o.v=add_var(empty,clone_typ(p->ntyp),STATIC,p->cl);
p->o.v->flags|=DEFINED;
p->o.flags=VAR;
p->o.reg=0;
p->o.val=p->val;
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==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))
ierror(0);
if(!p->left->o.v->vtyp->next)
ierror(0);
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_LIBCALLS
{ char *libname;
if(libname=use_libcall(p)){
np lc;struct Typ *t1,*t2;
if(p->flags==LSHIFT||p->flags==RSHIFT){
t1=clone_typ(p->ntyp);
t2=new_typ();
t2->flags=INT;
}else{
t1=arith_typ(p->left->ntyp,p->right->ntyp);
t2=clone_typ(t1);
}
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];
p->o=new->z;
add_IC(new);
p->o.flags|=DREFOBJ;
p->o.dtyp=POINTER_TYPE(p->ntyp);
}
return;
}
if(p->flags==ASSIGN){
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;
add_IC(new);
return;
}
if(p->flags==ASSIGNOP){
/* das hier ist nicht besonders schoen */
struct obj o,q;struct IC *n;int f;char *libname;
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(p->right)){
np lc;struct Typ *t1,*t2;
t1=clone_typ(p->ntyp);
if(p->right->flags==LSHIFT||p->right->flags==RSHIFT){
t2=new_typ();
t2->flags=INT;
}else
t2=clone_typ(p->ntyp);
lc=gen_libcall(libname,p->right->left,t1,p->right->right,t2);
*p->right=*lc;
o=p->left->o;
p->left=0;
free(lc);
}else
#endif
{
f=do_arith(p->right,new,p->left,&o);
if(!f) ierror(0);
if(f>1) ierror(0);
}
if(!nocode&&(o.flags&(SCRATCH|REG))==(SCRATCH|REG)&&!regs[o.reg]){
/* ueberfluessiges FREEREG entfernen */
n=last_ic;
while(n){
if(!nocode&&n->code==CALL&®scratch[o.reg]){
struct IC *ret;
regs[o.reg]=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==o.reg) ret->z.flags&=~REG;
}else
ret=ret->prev;
savescratch(MOVETOREG,ret,0,&n->q1);
}
if(n->code==FREEREG&&n->q1.reg==o.reg){
remove_IC(n);if(!nocode) regs[o.reg]=1;
break;
}
n=n->prev;
}
}
convert(p->right,p->ntyp->flags);
new=new_IC();
new->typf=p->ntyp->flags;
new->q2.flags=0;
new->code=ASSIGN;
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->left->ntyp->flags,0,p->left->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);*/
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(!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{
gen_test(&p->left->o,p->left->ntyp->flags,BNE,((!ltrue)?l1:lfalse));
}
if(ltrue){
new=new_IC();
new->code=BRA;
if(!ltrue) new->typf=l2; else new->typf=ltrue;
add_IC(new);
p->o.flags=0;
}else{
gen_label(l3);
gen_cond(&p->o,0,l1,l2);
}
return;
}
if(p->flags>=EQUAL&&p->flags<=GREATEREQ){
int l1,l2,l3,tl,tr;
if(!ltrue) {l1=++label;l2=++label;l3=++label;}
if(p->left->flags==CEXPR){
/* Konstanten nach rechts */
np merk;merk=p->left;p->left=p->right;p->right=merk;
if(p->flags==LESS) p->flags=GREATER;
else if(p->flags==LESSEQ) p->flags=GREATEREQ;
else if(p->flags==GREATER) p->flags=LESS;
else if(p->flags==GREATEREQ) p->flags=LESSEQ;
}
new->code=COMPARE;
tl=p->left->ntyp->flags&NU;tr=p->right->ntyp->flags&NU;
if(p->right->flags==CEXPR&&ISINT(tr)&&ISINT(tl)){
int negativ;
eval_constn(p->right);
if(zmleq(vmax,l2zm(0L))) negativ=1; else negativ=0;
if((tl&UNSIGNED)||(tr&UNSIGNED)) negativ=0;
if((!negativ||zmleq(t_min(tl),vmax))&&(negativ||zumleq(vumax,t_max(tl)))){
convert(p->right,tl);
tr=tl;
}
}
if(ISARITH(tl)&&(tl!=tr||!shortcut(COMPARE,tl))){
struct Typ *t;
t=arith_typ(p->left->ntyp,p->right->ntyp);
new->typf=t->flags;
freetyp(t);
}else{
new->typf=p->left->ntyp->flags;
}
gen_IC(p->left,0,0);
convert(p->left,new->typf);
gen_IC(p->right,0,0);
convert(p->right,new->typf);
new->q1=p->left->o;
new->q2=p->right->o;
new->z.flags=0;
if(p->flags==EQUAL||p->flags==INEQUAL){
/* generate TEST, if possible */
if(new->q2.flags&KONST){
eval_const(&new->q2.val,new->typf);
if(zmeqto(vmax,l2zm(0L))&&zumeqto(vumax,ul2zum(0UL))&&zldeqto(vldouble,d2zld(0.0))){
new->code=TEST;
new->q2.flags=0;
}
}
}
add_IC(new);
new=new_IC();
if(p->flags==EQUAL) new->code=BEQ;
if(p->flags==INEQUAL) new->code=BNE;
if(p->flags==LESS) new->code=BLT;
if(p->flags==LESSEQ) new->code=BLE;
if(p->flags==GREATER) new->code=BGT;
if(p->flags==GREATEREQ) new->code=BGE;
if(ltrue) new->typf=ltrue; else new->typf=l1;
add_IC(new);
if(ltrue){
new=new_IC();
new->code=BRA;
new->typf=lfalse;
add_IC(new);
p->o.flags=0;
}else{
gen_label(l3);
gen_cond(&p->o,1,l1,l2);
}
return;
}
if(p->flags==CALL){
int r=0;struct obj *op,cfunc,ret_obj;zmax sz;
int mregs[MAXR+1];
struct IC *callic;
#ifdef ORDERED_PUSH
struct IC *merk_fp,*lp;
unsigned int merk_opushed=opushed;
#endif
if(p->left->flags==ADDRESS&&p->left->left->flags==IDENTIFIER){
struct Var *v;
gen_IC(p->left,0,0); r=1;
v=p->left->o.v;
if(v->fi&&v->fi->first_ic&&!cross_module&&(c_flags_val[0].l&4096)){
/* function call inlining */
struct argument_list *al;
struct Var *vp,**argl1,**argl2;
struct IC *ip;int lc;
int arg_cnt=0,i;
if(DEBUG&1024){
printf("inlining call to <%s>\n",v->identifier);
for(vp=v->fi->vars;vp;vp=vp->next)
printf("%s(%ld)/%p\n",vp->identifier,zm2l(vp->offset),(void*)vp);
}
for(vp=v->fi->vars;vp;vp=vp->next){
/*FIXME: zmeqto hier ok? siehe cross_module_inline */
if((zmeqto(vp->offset,l2zm(0L))||vp->reg)&&*vp->identifier&&(vp->storage_class==AUTO||vp->storage_class==REGISTER)) arg_cnt++;
}
/* Argumente in die ersten Parametervariablen kopieren */
argl1=mymalloc(arg_cnt*sizeof(struct Var *));
argl2=mymalloc(arg_cnt*sizeof(struct Var *));
al=p->alist;vp=v->fi->vars;i=0;
while(al){
/*FIXME: zmeqto hier ok? siehe cross_module_inline */
while(vp&&(!*vp->identifier||(!zmeqto(vp->offset,l2zm(0L))&&!vp->reg)||(vp->storage_class!=REGISTER&&vp->storage_class!=AUTO))) vp=vp->next;
if(!vp){ error(39); break; }
if(i>=arg_cnt) ierror(0);
if(DEBUG&1024) printf("arg: %s(%ld)\n",vp->identifier,zm2l(vp->offset));
argl1[i]=vp;
argl2[i]=add_var(empty,clone_typ(vp->vtyp),vp->storage_class,0);
if(!al->arg) ierror(0);
gen_IC(al->arg,0,0);
convert(al->arg,vp->vtyp->flags);
new=new_IC();
new->code=ASSIGN;
new->q1=al->arg->o;
new->q2.flags=0;
new->q2.val.vmax=szof(vp->vtyp);
new->z.flags=VAR;
new->z.val.vmax=l2zm(0L);
new->z.v=argl2[i];
new->typf=vp->vtyp->flags;
add_IC(new);
i++;
al=al->next;
vp=vp->next;
}
if(i<arg_cnt){ error(83); arg_cnt=i;}
/* Kopien der Variablen erzeugen */
for(vp=v->fi->vars;vp;vp=vp->next){
vp->inline_copy=0;
}
for(i=0;i<arg_cnt;i++){
if(argl1[i]){
if(!argl2[i]) ierror(0);
argl1[i]->inline_copy=argl2[i];
}
}
/* Rueckgabewert */
if((p->ntyp->flags&NQ)!=VOID){
p->o.flags=SCRATCH|VAR;
p->o.reg=0;p->o.val.vmax=l2zm(0L);
p->o.v=add_var(empty,clone_typ(p->ntyp),AUTO,0);
}else{
p->o.flags=0;
}
free(argl1);
free(argl2);
/* Code einfuegen und Labels umschreiben */
ip=v->fi->first_ic;lc=0;
while(ip){
struct Var *iv;
int c;
new=new_IC();
*new=*ip;
ip->copy=new;
c=ip->code;
/* evtl. ist ein IC praktisch ein SETRETURN, falls das */
/* Rueckgabeziel ueber Parameterzeiger angespr. wird */
if(ip->z.flags&VAR){
iv=ip->z.v;
if(iv->storage_class==AUTO||iv->storage_class==REGISTER){
if(!*iv->identifier&&zmeqto(iv->offset,l2zm(0L))){
new->z=p->o;
}else{
if(!iv->inline_copy){
iv->inline_copy=add_var(empty,clone_typ(iv->vtyp),iv->storage_class,0);
iv->inline_copy->reg=iv->reg;
}
new->z.v=iv->inline_copy;
}/*else if(iv->inline_copy) ierror(0);*/
}
}
/* Kopien aller auto/register Variablen erzeugen */
if(ip->q1.flags&VAR){
iv=ip->q1.v;
if(iv->storage_class==AUTO||iv->storage_class==REGISTER){
if(!iv->inline_copy){
iv->inline_copy=add_var(empty,clone_typ(iv->vtyp),iv->storage_class,0);
iv->inline_copy->reg=iv->reg;
}
new->q1.v=iv->inline_copy;
}/*else if(iv->inline_copy) ierror(0);*/
}
if(ip->q2.flags&VAR){
iv=ip->q2.v;
if(iv->storage_class==AUTO||iv->storage_class==REGISTER){
if(!iv->inline_copy){
iv->inline_copy=add_var(empty,clone_typ(iv->vtyp),iv->storage_class,0);
iv->inline_copy->reg=iv->reg;
}
new->q2.v=iv->inline_copy;
}/*else if(iv->inline_copy) ierror(0);*/
}
if(c==CALL){
int i;
function_calls+=currentpri;
new->arg_list=mymalloc(sizeof(*new->arg_list)*new->arg_cnt);
for(i=0;i<new->arg_cnt;i++) new->arg_list[i]=ip->arg_list[i]->copy;
}
if(c==LABEL||(c>=BEQ&&c<=BRA)){
if(new->typf>lc) lc=new->typf;
new->typf+=label;
}
if(c==SETRETURN){
new->code=ASSIGN;
new->z=p->o;
}
add_IC(new);
ip=ip->next;
}
label+=lc;
return;
}
/* einige spezielle Inline-Funktionen; das setzt voraus, dass */
/* diese in den Headerfiles passend deklariert werden */
if(v->storage_class==EXTERN){
if((optflags&2)&&!strcmp(v->identifier,"strlen")&&p->alist&&p->alist->arg){
np n=p->alist->arg;
if(n->flags==ADDRESSA&&n->left->flags==STRING&&zmeqto(n->left->val.vmax,l2zm(0L))){
struct const_list *cl;zumax len=ul2zum(0UL);
cl=n->left->cl;
while(cl){
if(zmeqto(l2zm(0L),zc2zm(cl->other->val.vchar))) break;
len=zumadd(len,ul2zum(1UL));
cl=cl->next;
}
p->o.val.vumax=len;
eval_const(&p->o.val,UNSIGNED|MAXINT);
insert_constn(p);
insert_const(&p->o.val,p->ntyp->flags);
p->flags=CEXPR;
p->o.flags=KONST;
return;
}
}
if(INLINEMEMCPY>0&&(optflags&2)){
if(!strcmp(v->identifier,"strcpy")&&p->alist&&p->alist->next&&p->alist->next->arg){
np n=p->alist->next->arg;
if(n->flags==ADDRESSA&&n->left->flags==STRING&&zmeqto(n->left->val.vmax,l2zm(0L))){
struct const_list *cl;zmax len=l2zm(0L);
cl=n->left->cl;
while(cl){
len=zmadd(len,l2zm(1L));
if(zmeqto(zc2zm(cl->other->val.vchar),l2zm(0L))) break;
cl=cl->next;
}
if(zmleq(len,l2zm((long)INLINEMEMCPY))){
inline_memcpy(p->alist->arg,n,len);
p->o=p->alist->arg->o;
return;
}
}
}
if(!strcmp(v->identifier,"memcpy")){
if(p->alist&&p->alist->next&&p->alist->next->next
&&p->alist->next->next->arg
&&p->alist->next->next->arg->flags==CEXPR){
eval_constn(p->alist->next->next->arg);
if(zmleq(vmax,l2zm((long)INLINEMEMCPY))){
inline_memcpy(p->alist->arg,p->alist->next->arg,vmax);
p->o=p->alist->arg->o;
return;
}
}
}
}
}
}
rl=0;
if(!(optflags&2)){
int r;
for(r=1;r<=MAXR;r++){mregs[r]=regs[r];regs[r]&=~32;}
}
#ifdef ORDERED_PUSH
merk_fp=first_pushed;
first_pushed=0;
lp=last_ic;
#endif
#ifdef HAVE_REGPARMS
if(!freturn(p->ntyp)&&(p->ntyp->flags&NQ)!=VOID){
struct IC *new2;static struct Typ ptyp={0};