Robust/src/Analysis/Locality/GenerateConversions.java

   1 package Analysis.Locality;
   2 import IR.State;
   3 import IR.Flat.*;
   4 import java.util.*;
   5 import IR.MethodDescriptor;
   6
   7
   8 public class GenerateConversions {
   9     LocalityAnalysis locality;
  10     State state;
  11
  12     /** Warning: This class modifies the code in place.  */
  13
  14     public GenerateConversions(LocalityAnalysis la, State state) {
  15         locality=la;
  16         this.state=state;
  17         doConversion();
  18     }
  19
  20     private void doConversion() {
  21         Set<LocalityBinding> bindings=locality.getLocalityBindings();
  22         Iterator<LocalityBinding> bindit=bindings.iterator();
  23         while(bindit.hasNext()) {
  24             LocalityBinding lb=bindit.next();
  25             //Don't need to do conversion if it is already atomic
  26             if (lb.isAtomic())
  27                 continue;
  28             converttoPtr(lb);
  29             converttoOid(lb);
  30         }
  31     }
  32
  33     /* At the end of an atomic block, we need to convert any global
  34      * references that will be used again into OID's */
  35
  36     private void converttoOid(LocalityBinding lb) {
  37         Hashtable<FlatNode, Integer> atomictab=locality.getAtomic(lb);
  38         Hashtable<FlatNode, Hashtable<TempDescriptor, Integer>> temptab=locality.getNodeTempInfo(lb);
  39         MethodDescriptor md=lb.getMethod();
  40         FlatMethod fm=state.getMethodFlat(md);
  41
  42         Hashtable<FlatNode, Set<TempNodePair>> nodetotnpair=new Hashtable<FlatNode, Set<TempNodePair>>();
  43         Hashtable<FlatNode, Set<TempDescriptor>> nodetoconvs=new Hashtable<FlatNode, Set<TempDescriptor>>();
  44
  45         Set<FlatNode> toprocess=fm.getNodeSet();
  46
  47         while(!toprocess.isEmpty()) {
  48             FlatNode fn=toprocess.iterator().next();
  49             toprocess.remove(fn);
  50             boolean isatomic=atomictab.get(fn).intValue()>0;
  51             Hashtable<TempDescriptor, Integer> nodetemptab=temptab.get(fn);
  52
  53             List<TempDescriptor> reads=Arrays.asList(fn.readsTemps());
  54             List<TempDescriptor> writes=Arrays.asList(fn.writesTemps());
  55
  56             if (!isatomic&&fn.kind()==FKind.FlatAtomicExitNode
  57                 &&!nodetoconvs.containsKey(fn))
  58                 nodetoconvs.put(fn, new HashSet<TempDescriptor>());
  59
  60
  61             HashSet<TempNodePair> tempset=new HashSet<TempNodePair>();
  62             for(int i=0;i<fn.numPrev();i++) {
  63                 FlatNode fnprev=fn.getPrev(i);
  64                 if (!nodetotnpair.containsKey(fnprev))
  65                     continue;
  66                 Set<TempNodePair> prevset=nodetotnpair.get(fnprev);
  67                 for(Iterator<TempNodePair> it=prevset.iterator();it.hasNext();) {
  68                     TempNodePair tnp=it.next();
  69                     if (reads.contains(tnp.getTemp())&&tnp.getNode()!=null) {
  70                         //Value actually is read...
  71                         nodetoconvs.get(tnp.getNode()).add(tnp.getTemp());
  72                     }
  73                     if (writes.contains(tnp.getTemp())) //value overwritten
  74                         continue;
  75                     if (!isatomic&&fn.kind()==FKind.FlatAtomicExitNode) {
  76                         //Create new node and tag it with this exit
  77                         if (tnp.getNode()==null) {
  78                             TempNodePair tnp2=new TempNodePair(tnp.getTemp());
  79                             tnp2.setNode(fn);
  80                             tempset.add(tnp2);
  81                         } else
  82                             tempset.add(tnp);
  83                     } else
  84                         tempset.add(tnp);
  85                 }
  86             }
  87             if (isatomic) {
  88                 //if this is in an atomic block, record temps that are written to
  89
  90                 /* NOTE: If this compiler is changed to maintain
  91                  * OID/Ptr's in variables, then we need to use all
  92                  * global temps that could be read and not just the
  93                  * ones converted by globalconvnode*/
  94
  95                 if (fn.kind()!=FKind.FlatGlobalConvNode||
  96                     ((FlatGlobalConvNode)fn).getLocality()==lb)
  97                     //If globalconvnode, make sure we have the right locality
  98                     for(Iterator<TempDescriptor> writeit=writes.iterator();writeit.hasNext();) {
  99                         TempDescriptor wrtmp=writeit.next();
 100                         if (nodetemptab.get(wrtmp)==LocalityAnalysis.GLOBAL) {
 101                             TempNodePair tnp=new TempNodePair(wrtmp);
 102                             tempset.add(tnp);
 103                         }
 104                     }
 105             }
 106             if (!nodetotnpair.containsKey(fn)||!nodetotnpair.get(fn).equals(tempset)) {
 107                 //changes to set, so enqueue next nodes
 108                 nodetotnpair.put(fn, tempset); //update set
 109                 for(int i=0;i<fn.numNext();i++) {
 110                     toprocess.add(fn.getNext(i));
 111                 }
 112             }
 113         }
 114         //Place Convert to Oid nodes
 115         toprocess=fm.getNodeSet();
 116         for(Iterator<FlatNode> it=toprocess.iterator();it.hasNext();) {
 117             FlatNode fn=it.next();
 118             if (atomictab.get(fn).intValue()==0&&fn.numPrev()>0&&
 119                 atomictab.get(fn.getPrev(0)).intValue()>0) {
 120                 //sanity check
 121                 assert(fn.kind()==FKind.FlatAtomicExitNode);
 122                 //insert calls here...
 123                 Set<TempDescriptor> tempset=nodetoconvs.get(fn);
 124                 for(Iterator<TempDescriptor> tempit=tempset.iterator();tempit.hasNext();) {
 125                     FlatGlobalConvNode fgcn=new FlatGlobalConvNode(tempit.next(), lb, false);
 126                     atomictab.put(fgcn, atomictab.get(fn));
 127                     temptab.put(fgcn, (Hashtable<TempDescriptor, Integer>) temptab.get(fn).clone());
 128                     for(int i=0;i<fn.numPrev();i++) {
 129                         FlatNode fnprev=fn.getPrev(i);
 130                         for(int j=0;j<fnprev.numNext();j++) {
 131                             if (fnprev.getNext(j)==fn) {
 132                                 //found index, change node
 133                                 fnprev.setNext(j, fgcn);
 134                                 break;
 135                             }
 136                         }
 137                     }
 138                     fgcn.addNext(fn);
 139                 }
 140             }
 141         }
 142     }
 143
 144     /* At the beginning of an atomic block, we need to convert any
 145      * OID's that will be used in the atomic block to pointers */
 146
 147     private void converttoPtr(LocalityBinding lb) {
 148         Hashtable<FlatNode, Set<TempDescriptor>> nodetotranstemps=new Hashtable<FlatNode, Set<TempDescriptor>>();
 149         Hashtable<FlatNode, Integer> atomictab=locality.getAtomic(lb);
 150         Hashtable<FlatNode, Hashtable<TempDescriptor, Integer>> temptab=locality.getNodeTempInfo(lb);
 151         MethodDescriptor md=lb.getMethod();
 152         FlatMethod fm=state.getMethodFlat(md);
 153         Set<FlatNode> toprocess=fm.getNodeSet();
 154
 155         while(!toprocess.isEmpty()) {
 156             FlatNode fn=toprocess.iterator().next();
 157             toprocess.remove(fn);
 158
 159             if (atomictab.get(fn).intValue()>0) {
 160                 //build set of transaction temps use by next nodes
 161                 HashSet<TempDescriptor> transtemps=new HashSet<TempDescriptor>();
 162                 for(int i=0;i<fn.numNext();i++) {
 163                     FlatNode fnnext=fn.getNext(i);
 164                     if (nodetotranstemps.containsKey(fnnext))
 165                         transtemps.addAll(nodetotranstemps.get(fnnext));
 166                 }
 167                 //subtract out the ones we write to
 168                 transtemps.removeAll(Arrays.asList(fn.writesTemps()));
 169                 //add in the globals we read from
 170                 Hashtable<TempDescriptor, Integer> pretemptab=locality.getNodePreTempInfo(lb, fn);
 171                 TempDescriptor []readtemps=fn.readsTemps();
 172                 for(int i=0;i<readtemps.length;i++) {
 173                     TempDescriptor tmp=readtemps[i];
 174                     if (pretemptab.get(tmp).intValue()==LocalityAnalysis.GLOBAL) {
 175                         transtemps.add(tmp);
 176                     }
 177                 }
 178                 if (!nodetotranstemps.containsKey(fn)||!nodetotranstemps.get(fn).equals(transtemps)) {
 179                     nodetotranstemps.put(fn, transtemps);
 180                     for(int i=0;i<fn.numPrev();i++)
 181                         toprocess.add(fn.getPrev(i));
 182                 }
 183             }
 184         }
 185         toprocess=fm.getNodeSet();
 186         for(Iterator<FlatNode> it=toprocess.iterator();it.hasNext();) {
 187             FlatNode fn=it.next();
 188             if (atomictab.get(fn).intValue()>0&&
 189                 atomictab.get(fn.getPrev(0)).intValue()==0) {
 190                 //sanity check
 191                 assert(fn.kind()==FKind.FlatAtomicEnterNode);
 192
 193                 //insert calls here...
 194                 Set<TempDescriptor> tempset=nodetotranstemps.get(fn);
 195                 for(Iterator<TempDescriptor> tempit=tempset.iterator();tempit.hasNext();) {
 196                     FlatGlobalConvNode fgcn=new FlatGlobalConvNode(tempit.next(), lb, true);
 197                     atomictab.put(fgcn, atomictab.get(fn));
 198                     temptab.put(fgcn, (Hashtable<TempDescriptor, Integer>) temptab.get(fn).clone());
 199                     fgcn.addNext(fn.getNext(0));
 200                     fn.setNext(0, fgcn);
 201                 }
 202             }
 203         }
 204     }
 205 }