544 lines
12 KiB
C
544 lines
12 KiB
C
#include "assert.h"
|
|
#include <stdio.h>
|
|
#include "param.h"
|
|
#include "tables.h"
|
|
#include "types.h"
|
|
#include <cg_pattern.h>
|
|
#include "data.h"
|
|
#include "result.h"
|
|
#include "extern.h"
|
|
|
|
/*
|
|
* (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
|
*
|
|
* This product is part of the Amsterdam Compiler Kit.
|
|
*
|
|
* Permission to use, sell, duplicate or disclose this software must be
|
|
* obtained in writing. Requests for such permissions may be sent to
|
|
*
|
|
* Dr. Andrew S. Tanenbaum
|
|
* Wiskundig Seminarium
|
|
* Vrije Universiteit
|
|
* Postbox 7161
|
|
* 1007 MC Amsterdam
|
|
* The Netherlands
|
|
*
|
|
* Author: Hans van Staveren
|
|
*/
|
|
|
|
string myalloc();
|
|
unsigned codegen();
|
|
|
|
match(tp,tep,optexp) register token_p tp; register set_p tep; {
|
|
register bitno;
|
|
token_p ct;
|
|
result_t result;
|
|
|
|
if (tp->t_token == -1) { /* register frame */
|
|
bitno = tp->t_att[0].ar+1;
|
|
if (tep->set_val[bitno>>4]&(1<<(bitno&017)))
|
|
if (tep->set_val[0]&1 || getrefcount(tp->t_att[0].ar)<=1)
|
|
goto oklabel;
|
|
return(0);
|
|
} else { /* token frame */
|
|
bitno = tp->t_token+NREGS+1;
|
|
if ((tep->set_val[bitno>>4]&(1<<(bitno&017)))==0)
|
|
return(0);
|
|
}
|
|
oklabel:
|
|
if (optexp==0)
|
|
return(1);
|
|
ct=curtoken;
|
|
curtoken=tp;
|
|
result=compute(&enodes[optexp]);
|
|
curtoken=ct;
|
|
return(result.e_v.e_con);
|
|
}
|
|
|
|
instance(instno,token) token_p token; {
|
|
inst_p inp;
|
|
int i;
|
|
token_p tp;
|
|
struct reginfo *rp;
|
|
int regno;
|
|
result_t result;
|
|
|
|
if (instno==0) {
|
|
token->t_token = 0;
|
|
for(i=0;i<TOKENSIZE;i++)
|
|
token->t_att[i].aw=0;
|
|
return;
|
|
}
|
|
inp= &tokeninstances[instno];
|
|
switch(inp->in_which) {
|
|
default:
|
|
assert(FALSE);
|
|
case IN_COPY:
|
|
tp= &fakestack[stackheight-inp->in_info[0]];
|
|
if (inp->in_info[1]==0) {
|
|
*token = *tp;
|
|
} else {
|
|
token->t_token= -1;
|
|
#if MAXMEMBERS!=0
|
|
if (tp->t_token == -1) {
|
|
rp = &machregs[tp->t_att[0].ar];
|
|
token->t_att[0].ar=rp->r_members[inp->in_info[1]-1];
|
|
} else {
|
|
#endif
|
|
assert(tokens[tp->t_token].t_type[inp->in_info[1]-1] == EV_REG);
|
|
token->t_att[0].ar=tp->t_att[inp->in_info[1]-1].ar;
|
|
#if MAXMEMBERS!=0
|
|
}
|
|
#endif
|
|
}
|
|
return;
|
|
case IN_RIDENT:
|
|
token->t_token= -1;
|
|
token->t_att[0].ar= inp->in_info[0];
|
|
return;
|
|
#ifdef REGVARS
|
|
case IN_REGVAR:
|
|
result=compute(&enodes[inp->in_info[0]]);
|
|
i=isregvar((long)result.e_v.e_con);
|
|
assert(i>0);
|
|
token->t_token= -1;
|
|
token->t_att[0].ar = i;
|
|
return;
|
|
#endif
|
|
case IN_ALLOC:
|
|
token->t_token= -1;
|
|
regno=allreg[inp->in_info[0]];
|
|
#if MAXMEMBERS!=0
|
|
if (inp->in_info[1])
|
|
regno=machregs[regno].r_members[inp->in_info[1]-1];
|
|
#endif
|
|
token->t_att[0].ar = regno;
|
|
return;
|
|
case IN_DESCR:
|
|
token->t_token=inp->in_info[0];
|
|
for (i=0;i<TOKENSIZE;i++)
|
|
if (inp->in_info[i+1]==0) {
|
|
assert(tokens[token->t_token].t_type[i]==0);
|
|
token->t_att[i].aw=0;
|
|
} else {
|
|
result=compute(&enodes[inp->in_info[i+1]]);
|
|
assert(tokens[token->t_token].t_type[i]==result.e_typ);
|
|
if (result.e_typ==EV_INT)
|
|
token->t_att[i].aw=result.e_v.e_con;
|
|
else if (result.e_typ==EV_STR)
|
|
token->t_att[i].as= result.e_v.e_str;
|
|
else
|
|
token->t_att[i].ar=result.e_v.e_reg;
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
cinstance(instno,token,tp,regno) token_p token,tp; {
|
|
inst_p inp;
|
|
int i;
|
|
struct reginfo *rp;
|
|
result_t result;
|
|
int sh; /* saved stackheight */
|
|
|
|
assert(instno!=0);
|
|
inp= &tokeninstances[instno];
|
|
switch(inp->in_which) {
|
|
default:
|
|
assert(FALSE);
|
|
case IN_COPY:
|
|
assert(inp->in_info[0] == 1);
|
|
if (inp->in_info[1]==0) {
|
|
*token = *tp;
|
|
} else {
|
|
token->t_token= -1;
|
|
#if MAXMEMBERS!=0
|
|
if (tp->t_token == -1) {
|
|
rp = &machregs[tp->t_att[0].ar];
|
|
token->t_att[0].ar=rp->r_members[inp->in_info[1]-1];
|
|
} else {
|
|
#endif
|
|
assert(tokens[tp->t_token].t_type[inp->in_info[1]-1] == EV_REG);
|
|
token->t_att[0].ar=tp->t_att[inp->in_info[1]-1].ar;
|
|
#if MAXMEMBERS!=0
|
|
}
|
|
#endif
|
|
}
|
|
return;
|
|
case IN_RIDENT:
|
|
token->t_token= -1;
|
|
token->t_att[0].ar= inp->in_info[0];
|
|
return;
|
|
case IN_ALLOC:
|
|
token->t_token= -1;
|
|
assert(inp->in_info[0]==0);
|
|
#if MAXMEMBERS!=0
|
|
if (inp->in_info[1])
|
|
regno=machregs[regno].r_members[inp->in_info[1]-1];
|
|
#endif
|
|
token->t_att[0].ar = regno;
|
|
return;
|
|
case IN_DESCR:
|
|
sh = stackheight;
|
|
stackheight = tp - fakestack + 1;
|
|
token->t_token=inp->in_info[0];
|
|
for (i=0;i<TOKENSIZE;i++)
|
|
if (inp->in_info[i+1]==0) {
|
|
assert(tokens[token->t_token].t_type[i]==0);
|
|
token->t_att[i].aw=0;
|
|
} else {
|
|
result=compute(&enodes[inp->in_info[i+1]]);
|
|
assert(tokens[token->t_token].t_type[i]==result.e_typ);
|
|
if (result.e_typ==EV_INT)
|
|
token->t_att[i].aw=result.e_v.e_con;
|
|
else if (result.e_typ==EV_STR)
|
|
token->t_att[i].as= result.e_v.e_str;
|
|
else
|
|
token->t_att[i].ar=result.e_v.e_reg;
|
|
}
|
|
stackheight = sh;
|
|
return;
|
|
}
|
|
}
|
|
|
|
eqtoken(tp1,tp2) token_p tp1,tp2; {
|
|
register i;
|
|
register tkdef_p tdp;
|
|
|
|
if (tp1->t_token!=tp2->t_token)
|
|
return(0);
|
|
if (tp1->t_token==0)
|
|
return(1);
|
|
if (tp1->t_token==-1) {
|
|
if (tp1->t_att[0].ar!=tp2->t_att[0].ar)
|
|
return(0);
|
|
return(1);
|
|
}
|
|
tdp = &tokens[tp1->t_token];
|
|
for (i=0;i<TOKENSIZE;i++)
|
|
switch(tdp->t_type[i]) {
|
|
default:
|
|
return(1);
|
|
case EV_INT:
|
|
if (tp1->t_att[i].aw != tp2->t_att[i].aw)
|
|
return(0);
|
|
break;
|
|
case EV_REG:
|
|
if (tp1->t_att[i].ar != tp2->t_att[i].ar)
|
|
return(0);
|
|
break;
|
|
case EV_STR:
|
|
if (strcmp(tp1->t_att[i].as, tp2->t_att[i].as))
|
|
return(0);
|
|
break;
|
|
}
|
|
return(1);
|
|
}
|
|
|
|
distance(cindex) {
|
|
register char *bp;
|
|
register i;
|
|
register token_p tp;
|
|
int tokexp,tpl;
|
|
int expsize,toksize,exact;
|
|
int xsekt=0;
|
|
|
|
bp = &coderules[cindex];
|
|
switch( (*bp)&037 ) {
|
|
default:
|
|
return(stackheight==0 ? 0 : 100);
|
|
case DO_MATCH:
|
|
break;
|
|
case DO_XXMATCH:
|
|
xsekt++;
|
|
case DO_XMATCH:
|
|
xsekt++;
|
|
break;
|
|
}
|
|
tpl= ((*bp++)>>5)&07;
|
|
if (stackheight < tpl) {
|
|
if (xsekt)
|
|
return(MAXINT);
|
|
tpl = stackheight;
|
|
} else
|
|
if (stackheight != tpl && xsekt==2)
|
|
return(MAXINT);
|
|
exact=0;
|
|
tp= &fakestack[stackheight-1];
|
|
for (i=0;i<tpl;i++,tp--) {
|
|
getint(tokexp,bp);
|
|
if (!match(tp, &machsets[tokexp], 0)) {
|
|
if (xsekt)
|
|
return(MAXINT);
|
|
expsize = ssize(tokexp);
|
|
toksize = tsize(tp);
|
|
if (expsize>toksize)
|
|
return(100);
|
|
if (expsize<toksize)
|
|
return(99-i);
|
|
} else
|
|
exact++;
|
|
}
|
|
if (exact==tpl) {
|
|
if (xsekt)
|
|
return(0);
|
|
return(10-exact);
|
|
}
|
|
return(20-exact);
|
|
}
|
|
|
|
unsigned costcalc(cost) cost_t cost; {
|
|
result_t result1,result2;
|
|
extern unsigned cc1,cc2,cc3,cc4;
|
|
|
|
result1=compute(&enodes[cost.c_size]);
|
|
result2=compute(&enodes[cost.c_time]);
|
|
assert(result1.e_typ == EV_INT && result2.e_typ == EV_INT);
|
|
return(result1.e_v.e_con*cc1/cc2 + result2.e_v.e_con*cc3/cc4);
|
|
}
|
|
|
|
ssize(tokexpno) {
|
|
|
|
return(machsets[tokexpno].set_size);
|
|
}
|
|
|
|
tsize(tp) register token_p tp; {
|
|
|
|
if (tp->t_token==-1)
|
|
return(machregs[tp->t_att[0].ar].r_size);
|
|
return(tokens[tp->t_token].t_size);
|
|
}
|
|
|
|
#ifdef MAXSPLIT
|
|
instsize(tinstno,tp) token_p tp; {
|
|
inst_p inp;
|
|
struct reginfo *rp;
|
|
|
|
inp = &tokeninstances[tinstno];
|
|
switch(inp->in_which) {
|
|
default:
|
|
assert(FALSE);
|
|
case IN_COPY:
|
|
assert(inp->in_info[0]==1);
|
|
#if MAXMEMBERS!=0
|
|
if (inp->in_info[1]==0)
|
|
#endif
|
|
return(tsize(tp));
|
|
#if MAXMEMBERS!=0
|
|
else {
|
|
assert(tp->t_token == -1);
|
|
rp = &machregs[tp->t_att[0].ar];
|
|
return(machregs[rp->r_members[inp->in_info[1]-1]].r_size);
|
|
}
|
|
#endif
|
|
case IN_RIDENT:
|
|
return(machregs[inp->in_info[0]].r_size);
|
|
case IN_ALLOC:
|
|
assert(FALSE); /* cannot occur in splitting coercion */
|
|
case IN_DESCR:
|
|
return(tokens[inp->in_info[0]].t_size);
|
|
}
|
|
}
|
|
#endif MAXSPLIT
|
|
|
|
tref(tp,amount) register token_p tp; {
|
|
register i;
|
|
register tkdef_p tdp;
|
|
|
|
if (tp->t_token==-1)
|
|
chrefcount(tp->t_att[0].ar,amount,FALSE);
|
|
else {
|
|
tdp= &tokens[tp->t_token];
|
|
for(i=0;i<TOKENSIZE;i++)
|
|
if (tdp->t_type[i]==EV_REG)
|
|
chrefcount(tp->t_att[i].ar,amount,FALSE);
|
|
}
|
|
}
|
|
|
|
#define MAXSAVE 10
|
|
|
|
#ifdef MAXSPLIT
|
|
split(tp,ip,ply,toplevel) token_p tp; int *ip; {
|
|
c2_p cp;
|
|
token_t savestack[MAXSAVE];
|
|
int ok;
|
|
register i;
|
|
int diff;
|
|
token_p stp;
|
|
int tpl;
|
|
|
|
for (cp=c2coercs;cp< &c2coercs[NC2]; cp++) {
|
|
if (!match(tp,&machsets[cp->c2_texpno],0))
|
|
continue;
|
|
ok=1;
|
|
for (i=0; ok && i<cp->c2_nsplit;i++) {
|
|
if (ip[i]==0)
|
|
goto found;
|
|
if (instsize(cp->c2_repl[i],tp) != ssize(ip[i]))
|
|
ok=0;
|
|
}
|
|
goto found;
|
|
}
|
|
return(0);
|
|
found:
|
|
assert(stackheight+cp->c2_nsplit-1<MAXFSTACK);
|
|
stp = &fakestack[stackheight-1];
|
|
diff = stp - tp;
|
|
assert(diff<=MAXSAVE);
|
|
for (i=1;i<=diff;i++)
|
|
savestack[i-1] = tp[i]; /* save top of stack */
|
|
stackheight -= diff;
|
|
tpl = tokpatlen;
|
|
tokpatlen = 1;
|
|
codegen(&coderules[cp->c2_codep],ply,toplevel,MAXINT,0);
|
|
tokpatlen = tpl;
|
|
for (i=0;i<diff;i++) /* restore top of stack */
|
|
fakestack[stackheight++] = savestack[i];
|
|
return(cp->c2_nsplit);
|
|
}
|
|
#endif MAXSPLIT
|
|
|
|
unsigned docoerc(tp,cp,ply,toplevel,forced) token_p tp; c3_p cp; {
|
|
token_t savestack[MAXSAVE];
|
|
token_p stp;
|
|
int i,diff;
|
|
unsigned cost;
|
|
int tpl; /* saved tokpatlen */
|
|
|
|
stp = &fakestack[stackheight-1];
|
|
diff = stp -tp;
|
|
assert(diff<=MAXSAVE);
|
|
for (i=1;i<=diff;i++)
|
|
savestack[i-1] = tp[i];
|
|
stackheight -= diff;
|
|
tpl = tokpatlen;
|
|
tokpatlen = 1;
|
|
cost = codegen(&coderules[cp->c3_codep],ply,toplevel,MAXINT,forced);
|
|
tokpatlen = tpl;
|
|
for (i=0;i<diff;i++)
|
|
fakestack[stackheight++] = savestack[i];
|
|
nallreg = 0;
|
|
return(cost);
|
|
}
|
|
|
|
unsigned stackupto(limit,ply,toplevel) token_p limit; {
|
|
token_t savestack[MAXFSTACK];
|
|
token_p stp;
|
|
int i,diff;
|
|
int tpl; /* saved tokpatlen */
|
|
int nareg; /* saved nareg */
|
|
int areg[MAXALLREG];
|
|
c1_p cp;
|
|
register token_p tp;
|
|
unsigned totalcost=0;
|
|
struct reginfo *rp,**rpp;
|
|
|
|
for (tp=fakestack;tp<=limit;limit--) {
|
|
for (cp=c1coercs;cp< &c1coercs[NC1]; cp++) {
|
|
if (match(tp,&machsets[cp->c1_texpno],cp->c1_expr)) {
|
|
if (cp->c1_prop>=0) {
|
|
for (rpp=reglist[cp->c1_prop];
|
|
(rp = *rpp)!=0 &&
|
|
getrefcount(rp-machregs)!=0;
|
|
rpp++)
|
|
;
|
|
if (rp==0)
|
|
continue;
|
|
/* look for other possibility */
|
|
}
|
|
stp = &fakestack[stackheight-1];
|
|
diff = stp -tp;
|
|
assert(diff<=MAXFSTACK);
|
|
for (i=1;i<=diff;i++)
|
|
savestack[i-1] = tp[i];
|
|
stackheight -= diff;
|
|
tpl = tokpatlen;
|
|
tokpatlen = 1;
|
|
nareg = nallreg;
|
|
for (i=0;i<nareg;i++)
|
|
areg[i] = allreg[i];
|
|
if (cp->c1_prop>=0) {
|
|
nallreg=1; allreg[0] = rp-machregs;
|
|
chrefcount(allreg[0],1,FALSE);
|
|
} else
|
|
nallreg=0;
|
|
totalcost+= codegen(&coderules[cp->c1_codep],ply,toplevel,MAXINT,0);
|
|
totalcost+= costcalc(cp->c1_cost);
|
|
tokpatlen = tpl;
|
|
for (i=0;i<diff;i++)
|
|
fakestack[stackheight++] = savestack[i];
|
|
nallreg=nareg;
|
|
for (i=0;i<nareg;i++)
|
|
allreg[i] = areg[i];
|
|
goto contin;
|
|
}
|
|
}
|
|
assert(FALSE);
|
|
contin: ;
|
|
}
|
|
return(totalcost);
|
|
}
|
|
|
|
c3_p findcoerc(tp,tep) token_p tp; set_p tep; {
|
|
register c3_p cp;
|
|
token_t rtoken;
|
|
register i;
|
|
register struct reginfo **rpp;
|
|
|
|
for (cp=c3coercs;cp< &c3coercs[NC3]; cp++) {
|
|
if (tp!=(token_p) 0) {
|
|
if (!match(tp,&machsets[cp->c3_texpno],0))
|
|
continue;
|
|
} else {
|
|
if (cp->c3_texpno!=0)
|
|
continue;
|
|
}
|
|
if (cp->c3_prop==0) { /* no reg needed */
|
|
cinstance(cp->c3_repl,&rtoken,tp,0);
|
|
if (match(&rtoken,tep,0))
|
|
return(cp);
|
|
} else {
|
|
curreglist = (rl_p) myalloc(sizeof (rl_t));
|
|
curreglist->rl_n = 0;
|
|
for (rpp=reglist[cp->c3_prop];*rpp;rpp++) {
|
|
i = *rpp - machregs;
|
|
cinstance(cp->c3_repl,&rtoken,tp,i);
|
|
if (match(&rtoken,tep,0))
|
|
curreglist->rl_list[curreglist->rl_n++] = i;
|
|
}
|
|
if (curreglist->rl_n != 0)
|
|
return(cp);
|
|
myfree(curreglist);
|
|
}
|
|
}
|
|
return(0); /* nothing found */
|
|
}
|
|
|
|
|
|
error(s,a1,a2,a3,a4) char *s; {
|
|
|
|
fatal(s,a1,a2,a3,a4);
|
|
}
|
|
|
|
fatal(s,a1,a2,a3,a4) char *s; {
|
|
|
|
fprintf(stderr,"Error: ");
|
|
fprintf(stderr,s,a1,a2,a3,a4);
|
|
fprintf(stderr,"\n");
|
|
out_finish();
|
|
abort();
|
|
exit(-1);
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
badassertion(asstr,file,line) char *asstr, *file; {
|
|
|
|
fatal("Assertion \"%s\" failed %s(%d)",asstr,file,line);
|
|
}
|
|
#endif
|
|
|
|
max(a,b) {
|
|
|
|
return(a>b ? a : b);
|
|
}
|