547 lines
12 KiB
C
547 lines
12 KiB
C
#ifndef NORCSID
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static char rcsid[] = "$Header$";
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#endif
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#include "assert.h"
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#include <stdio.h>
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#include "param.h"
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#include "tables.h"
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#include "types.h"
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#include <cg_pattern.h>
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#include "data.h"
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#include "result.h"
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#include "extern.h"
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/*
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* (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
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*
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* This product is part of the Amsterdam Compiler Kit.
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*
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* Permission to use, sell, duplicate or disclose this software must be
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* obtained in writing. Requests for such permissions may be sent to
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*
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* Dr. Andrew S. Tanenbaum
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* Wiskundig Seminarium
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* Vrije Universiteit
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* Postbox 7161
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* 1007 MC Amsterdam
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* The Netherlands
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*
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* Author: Hans van Staveren
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*/
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extern string myalloc();
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unsigned codegen();
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match(tp,tep,optexp) register token_p tp; register set_p tep; {
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register bitno;
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token_p ct;
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result_t result;
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if (tp->t_token == -1) { /* register frame */
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bitno = tp->t_att[0].ar+1;
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if (tep->set_val[bitno>>4]&(1<<(bitno&017)))
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if (tep->set_val[0]&1 || getrefcount(tp->t_att[0].ar)<=1)
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goto oklabel;
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return(0);
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} else { /* token frame */
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bitno = tp->t_token+NREGS+1;
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if ((tep->set_val[bitno>>4]&(1<<(bitno&017)))==0)
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return(0);
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}
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oklabel:
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if (optexp==0)
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return(1);
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ct=curtoken;
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curtoken=tp;
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result=compute(&enodes[optexp]);
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curtoken=ct;
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return(result.e_v.e_con);
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}
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instance(instno,token) register token_p token; {
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register inst_p inp;
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int i;
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token_p tp;
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struct reginfo *rp;
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int regno;
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result_t result;
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if (instno==0) {
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token->t_token = 0;
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for(i=0;i<TOKENSIZE;i++)
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token->t_att[i].aw=0;
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return;
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}
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inp= &tokeninstances[instno];
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switch(inp->in_which) {
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default:
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assert(FALSE);
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case IN_COPY:
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tp= &fakestack[stackheight-inp->in_info[0]];
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if (inp->in_info[1]==0) {
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*token = *tp;
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} else {
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token->t_token= -1;
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#if MAXMEMBERS!=0
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if (tp->t_token == -1) {
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rp = &machregs[tp->t_att[0].ar];
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token->t_att[0].ar=rp->r_members[inp->in_info[1]-1];
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} else {
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#endif
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assert(tokens[tp->t_token].t_type[inp->in_info[1]-1] == EV_REG);
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token->t_att[0].ar=tp->t_att[inp->in_info[1]-1].ar;
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#if MAXMEMBERS!=0
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}
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#endif
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}
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return;
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case IN_RIDENT:
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token->t_token= -1;
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token->t_att[0].ar= inp->in_info[0];
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return;
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#ifdef REGVARS
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case IN_REGVAR:
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result=compute(&enodes[inp->in_info[0]]);
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i=isregvar((long)result.e_v.e_con);
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assert(i>0);
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token->t_token= -1;
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token->t_att[0].ar = i;
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return;
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#endif
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case IN_ALLOC:
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token->t_token= -1;
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regno=allreg[inp->in_info[0]];
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#if MAXMEMBERS!=0
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if (inp->in_info[1])
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regno=machregs[regno].r_members[inp->in_info[1]-1];
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#endif
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token->t_att[0].ar = regno;
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return;
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case IN_DESCR:
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token->t_token=inp->in_info[0];
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for (i=0;i<TOKENSIZE;i++)
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if (inp->in_info[i+1]==0) {
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assert(tokens[token->t_token].t_type[i]==0);
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token->t_att[i].aw=0;
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} else {
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result=compute(&enodes[inp->in_info[i+1]]);
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assert(tokens[token->t_token].t_type[i]==result.e_typ);
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if (result.e_typ==EV_INT)
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token->t_att[i].aw=result.e_v.e_con;
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else if (result.e_typ==EV_STR)
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token->t_att[i].as= result.e_v.e_str;
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else
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token->t_att[i].ar=result.e_v.e_reg;
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}
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return;
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}
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}
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cinstance(instno,token,tp,regno) register token_p token,tp; {
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register inst_p inp;
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int i;
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struct reginfo *rp;
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result_t result;
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int sh; /* saved stackheight */
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assert(instno!=0);
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inp= &tokeninstances[instno];
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switch(inp->in_which) {
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default:
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assert(FALSE);
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case IN_COPY:
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assert(inp->in_info[0] == 1);
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if (inp->in_info[1]==0) {
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*token = *tp;
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} else {
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token->t_token= -1;
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#if MAXMEMBERS!=0
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if (tp->t_token == -1) {
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rp = &machregs[tp->t_att[0].ar];
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token->t_att[0].ar=rp->r_members[inp->in_info[1]-1];
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} else {
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#endif
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assert(tokens[tp->t_token].t_type[inp->in_info[1]-1] == EV_REG);
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token->t_att[0].ar=tp->t_att[inp->in_info[1]-1].ar;
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#if MAXMEMBERS!=0
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}
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#endif
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}
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return;
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case IN_RIDENT:
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token->t_token= -1;
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token->t_att[0].ar= inp->in_info[0];
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return;
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case IN_ALLOC:
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token->t_token= -1;
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assert(inp->in_info[0]==0);
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#if MAXMEMBERS!=0
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if (inp->in_info[1])
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regno=machregs[regno].r_members[inp->in_info[1]-1];
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#endif
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token->t_att[0].ar = regno;
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return;
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case IN_DESCR:
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sh = stackheight;
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stackheight = tp - fakestack + 1;
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token->t_token=inp->in_info[0];
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for (i=0;i<TOKENSIZE;i++)
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if (inp->in_info[i+1]==0) {
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assert(tokens[token->t_token].t_type[i]==0);
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token->t_att[i].aw=0;
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} else {
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result=compute(&enodes[inp->in_info[i+1]]);
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assert(tokens[token->t_token].t_type[i]==result.e_typ);
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if (result.e_typ==EV_INT)
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token->t_att[i].aw=result.e_v.e_con;
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else if (result.e_typ==EV_STR)
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token->t_att[i].as= result.e_v.e_str;
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else
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token->t_att[i].ar=result.e_v.e_reg;
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}
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stackheight = sh;
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return;
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}
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}
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eqtoken(tp1,tp2) token_p tp1,tp2; {
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register i;
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register tkdef_p tdp;
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if (tp1->t_token!=tp2->t_token)
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return(0);
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if (tp1->t_token==0)
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return(1);
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if (tp1->t_token==-1) {
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if (tp1->t_att[0].ar!=tp2->t_att[0].ar)
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return(0);
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return(1);
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}
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tdp = &tokens[tp1->t_token];
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for (i=0;i<TOKENSIZE;i++)
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switch(tdp->t_type[i]) {
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default:
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return(1);
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case EV_INT:
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if (tp1->t_att[i].aw != tp2->t_att[i].aw)
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return(0);
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break;
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case EV_REG:
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if (tp1->t_att[i].ar != tp2->t_att[i].ar)
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return(0);
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break;
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case EV_STR:
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if (strcmp(tp1->t_att[i].as, tp2->t_att[i].as))
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return(0);
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break;
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}
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return(1);
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}
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distance(cindex) {
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register char *bp;
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register i;
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register token_p tp;
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int tokexp,tpl;
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int expsize,toksize,exact;
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int xsekt=0;
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bp = &coderules[cindex];
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switch( (*bp)&037 ) {
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default:
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return(stackheight==0 ? 0 : 100);
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case DO_MATCH:
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break;
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case DO_XXMATCH:
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xsekt++;
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case DO_XMATCH:
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xsekt++;
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break;
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}
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tpl= ((*bp++)>>5)&07;
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if (stackheight < tpl) {
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if (xsekt)
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return(MAXINT);
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tpl = stackheight;
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} else
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if (stackheight != tpl && xsekt==2)
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return(MAXINT);
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exact=0;
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tp= &fakestack[stackheight-1];
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for (i=0;i<tpl;i++,tp--) {
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getint(tokexp,bp);
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if (!match(tp, &machsets[tokexp], 0)) {
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if (xsekt)
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return(MAXINT);
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expsize = ssize(tokexp);
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toksize = tsize(tp);
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if (expsize>toksize)
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return(100);
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if (expsize<toksize)
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return(99-i);
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} else
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exact++;
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}
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if (exact==tpl) {
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if (xsekt)
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return(0);
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return(10-exact);
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}
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return(20-exact);
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}
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unsigned costcalc(cost) cost_t cost; {
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result_t result1,result2;
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extern unsigned cc1,cc2,cc3,cc4;
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result1=compute(&enodes[cost.c_size]);
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result2=compute(&enodes[cost.c_time]);
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assert(result1.e_typ == EV_INT && result2.e_typ == EV_INT);
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return(result1.e_v.e_con*cc1/cc2 + result2.e_v.e_con*cc3/cc4);
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}
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ssize(tokexpno) {
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return(machsets[tokexpno].set_size);
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}
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tsize(tp) register token_p tp; {
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if (tp->t_token==-1)
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return(machregs[tp->t_att[0].ar].r_size);
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return(tokens[tp->t_token].t_size);
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}
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#ifdef MAXSPLIT
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instsize(tinstno,tp) token_p tp; {
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inst_p inp;
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struct reginfo *rp;
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inp = &tokeninstances[tinstno];
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switch(inp->in_which) {
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default:
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assert(FALSE);
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case IN_COPY:
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assert(inp->in_info[0]==1);
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#if MAXMEMBERS!=0
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if (inp->in_info[1]==0)
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#endif
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return(tsize(tp));
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#if MAXMEMBERS!=0
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else {
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assert(tp->t_token == -1);
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rp = &machregs[tp->t_att[0].ar];
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return(machregs[rp->r_members[inp->in_info[1]-1]].r_size);
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}
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#endif
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case IN_RIDENT:
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return(machregs[inp->in_info[0]].r_size);
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case IN_ALLOC:
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assert(FALSE); /* cannot occur in splitting coercion */
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case IN_DESCR:
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return(tokens[inp->in_info[0]].t_size);
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}
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}
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#endif MAXSPLIT
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tref(tp,amount) register token_p tp; {
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register i;
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register tkdef_p tdp;
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if (tp->t_token==-1)
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chrefcount(tp->t_att[0].ar,amount,FALSE);
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else {
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tdp= &tokens[tp->t_token];
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for(i=0;i<TOKENSIZE;i++)
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if (tdp->t_type[i]==EV_REG)
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chrefcount(tp->t_att[i].ar,amount,FALSE);
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}
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}
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#define MAXSAVE 10
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#ifdef MAXSPLIT
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split(tp,ip,ply,toplevel) token_p tp; int *ip; {
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c2_p cp;
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token_t savestack[MAXSAVE];
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int ok;
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register i;
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int diff;
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token_p stp;
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int tpl;
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for (cp=c2coercs;cp< &c2coercs[NC2]; cp++) {
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if (!match(tp,&machsets[cp->c2_texpno],0))
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continue;
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ok=1;
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for (i=0; ok && i<cp->c2_nsplit;i++) {
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if (ip[i]==0)
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goto found;
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if (instsize(cp->c2_repl[i],tp) != ssize(ip[i]))
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ok=0;
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}
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goto found;
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}
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return(0);
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found:
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assert(stackheight+cp->c2_nsplit-1<MAXFSTACK);
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stp = &fakestack[stackheight-1];
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diff = stp - tp;
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assert(diff<=MAXSAVE);
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for (i=1;i<=diff;i++)
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savestack[i-1] = tp[i]; /* save top of stack */
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stackheight -= diff;
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tpl = tokpatlen;
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tokpatlen = 1;
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codegen(&coderules[cp->c2_codep],ply,toplevel,MAXINT,0);
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tokpatlen = tpl;
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for (i=0;i<diff;i++) /* restore top of stack */
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fakestack[stackheight++] = savestack[i];
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return(cp->c2_nsplit);
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}
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#endif MAXSPLIT
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unsigned docoerc(tp,cp,ply,toplevel,forced) token_p tp; c3_p cp; {
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token_t savestack[MAXSAVE];
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token_p stp;
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int i,diff;
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unsigned cost;
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int tpl; /* saved tokpatlen */
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stp = &fakestack[stackheight-1];
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diff = stp -tp;
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assert(diff<=MAXSAVE);
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for (i=1;i<=diff;i++)
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savestack[i-1] = tp[i];
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stackheight -= diff;
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tpl = tokpatlen;
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tokpatlen = 1;
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cost = codegen(&coderules[cp->c3_codep],ply,toplevel,MAXINT,forced);
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tokpatlen = tpl;
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for (i=0;i<diff;i++)
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fakestack[stackheight++] = savestack[i];
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nallreg = 0;
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return(cost);
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}
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unsigned stackupto(limit,ply,toplevel) token_p limit; {
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token_t savestack[MAXFSTACK];
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token_p stp;
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int i,diff;
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int tpl; /* saved tokpatlen */
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int nareg; /* saved nareg */
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int areg[MAXALLREG];
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c1_p cp;
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register token_p tp;
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unsigned totalcost=0;
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struct reginfo *rp,**rpp;
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for (tp=fakestack;tp<=limit;limit--) {
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for (cp=c1coercs;cp< &c1coercs[NC1]; cp++) {
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if (match(tp,&machsets[cp->c1_texpno],cp->c1_expr)) {
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if (cp->c1_prop>=0) {
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for (rpp=reglist[cp->c1_prop];
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(rp = *rpp)!=0 &&
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getrefcount(rp-machregs)!=0;
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rpp++)
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;
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if (rp==0)
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continue;
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/* look for other possibility */
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}
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stp = &fakestack[stackheight-1];
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diff = stp -tp;
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assert(diff<=MAXFSTACK);
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for (i=1;i<=diff;i++)
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savestack[i-1] = tp[i];
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stackheight -= diff;
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tpl = tokpatlen;
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tokpatlen = 1;
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nareg = nallreg;
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for (i=0;i<nareg;i++)
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areg[i] = allreg[i];
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if (cp->c1_prop>=0) {
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nallreg=1; allreg[0] = rp-machregs;
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chrefcount(allreg[0],1,FALSE);
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} else
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nallreg=0;
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totalcost+= codegen(&coderules[cp->c1_codep],ply,toplevel,MAXINT,0);
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totalcost+= costcalc(cp->c1_cost);
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tokpatlen = tpl;
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for (i=0;i<diff;i++)
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fakestack[stackheight++] = savestack[i];
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nallreg=nareg;
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for (i=0;i<nareg;i++)
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allreg[i] = areg[i];
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goto contin;
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}
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}
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assert(FALSE);
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contin: ;
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}
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return(totalcost);
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}
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c3_p findcoerc(tp,tep) token_p tp; set_p tep; {
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register c3_p cp;
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token_t rtoken;
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register i;
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register struct reginfo **rpp;
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for (cp=c3coercs;cp< &c3coercs[NC3]; cp++) {
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if (tp!=(token_p) 0) {
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if (!match(tp,&machsets[cp->c3_texpno],0))
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continue;
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} else {
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if (cp->c3_texpno!=0)
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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,a5,a6,a7,a8) char *s; {
|
|
|
|
fatal(s,a1,a2,a3,a4,a5,a6,a7,a8);
|
|
}
|
|
|
|
fatal(s,a1,a2,a3,a4,a5,a6,a7,a8) char *s; {
|
|
|
|
fprintf(stderr,"Error: ");
|
|
fprintf(stderr,s,a1,a2,a3,a4,a5,a6,a7,a8);
|
|
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);
|
|
}
|