175 lines
3.5 KiB
C
175 lines
3.5 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 "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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chrefcount(regno,amount,tflag) {
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register struct reginfo *rp;
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register i;
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rp= &machregs[regno];
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#if MAXMEMBERS!=0
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if (rp->r_members[0]==0) {
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#endif
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rp->r_refcount += amount;
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if (tflag)
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rp->r_tcount += amount;
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assert(rp->r_refcount >= 0);
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#if MAXMEMBERS!=0
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} else
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for (i=0;i<MAXMEMBERS;i++)
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if (rp->r_members[i]!=0)
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chrefcount(rp->r_members[i],amount,tflag);
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#endif
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}
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getrefcount(regno) {
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register struct reginfo *rp;
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register i,maxcount;
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rp= &machregs[regno];
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#if MAXMEMBERS!=0
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if (rp->r_members[0]==0)
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#endif
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return(rp->r_refcount);
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#if MAXMEMBERS!=0
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else {
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maxcount=0;
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for (i=0;i<MAXMEMBERS;i++)
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if (rp->r_members[i]!=0)
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maxcount=max(maxcount,getrefcount(rp->r_members[i]));
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return(maxcount);
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}
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#endif
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}
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erasereg(regno) {
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register struct reginfo *rp;
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#if MAXMEMBERS==0
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awayreg(regno);
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#else
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for (rp=machregs;rp<machregs+NREGS;rp++)
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if (rp->r_clash[regno>>4]&(1<<(regno&017)))
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awayreg(rp-machregs);
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#endif
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}
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awayreg(regno) {
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register struct reginfo *rp;
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register tkdef_p tdp;
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register i;
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rp = &machregs[regno];
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rp->r_contents.t_token = 0;
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for (i=0;i<TOKENSIZE;i++)
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rp->r_contents.t_att[i].aw = 0;
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/* Now erase recursively all registers containing
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* something using this one
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*/
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for (rp=machregs;rp<machregs+NREGS;rp++) {
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if (rp->r_contents.t_token == -1) {
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if (rp->r_contents.t_att[0].ar == regno)
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erasereg(rp-machregs);
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} else {
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tdp= & tokens[rp->r_contents.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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rp->r_contents.t_att[i].ar == regno) {
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erasereg(rp-machregs);
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break;
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}
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}
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}
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}
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cleanregs() {
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register struct reginfo *rp;
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register i;
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for (rp=machregs;rp<machregs+NREGS;rp++) {
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rp->r_contents.t_token = 0;
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for (i=0;i<TOKENSIZE;i++)
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rp->r_contents.t_att[i].aw = 0;
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}
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}
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#ifndef NDEBUG
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inctcount(regno) {
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register struct reginfo *rp;
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register i;
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rp = &machregs[regno];
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#if MAXMEMBERS!=0
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if (rp->r_members[0] == 0) {
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#endif
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rp->r_tcount++;
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#if MAXMEMBERS!=0
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} else {
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for (i=0;i<MAXMEMBERS;i++)
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if (rp->r_members[i] != 0)
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inctcount(rp->r_members[i]);
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}
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#endif
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}
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chkregs() {
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register struct reginfo *rp;
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register token_p tp;
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register tkdef_p tdp;
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int i;
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for (rp=machregs;rp<machregs+NREGS;rp++) {
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assert(rp->r_tcount==0);
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}
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for (tp=fakestack;tp<fakestack+stackheight;tp++) {
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if (tp->t_token == -1)
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inctcount(tp->t_att[0].ar);
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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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inctcount(tp->t_att[i].ar);
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}
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}
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#ifdef REGVARS
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#include <em_reg.h>
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for(i=reg_any;i<=reg_float;i++) {
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int j;
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for(j=0;j<nregvar[i];j++)
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inctcount(rvnumbers[i][j]);
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}
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#endif REGVARS
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for (rp=machregs;rp<machregs+NREGS;rp++) {
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assert(rp->r_refcount==rp->r_tcount);
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rp->r_tcount=0;
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}
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}
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#endif
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