1 package Analysis.Locality;
5 import IR.MethodDescriptor;
8 public class GenerateConversions {
9 LocalityAnalysis locality;
12 /** Warning: This class modifies the code in place. */
14 public GenerateConversions(LocalityAnalysis la, State state) {
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
33 /* At the end of an atomic block, we need to convert any global
34 * references that will be used again into OID's. */
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 Hashtable<FlatNode, Set<TempNodePair>> nodetotnpair=new Hashtable<FlatNode, Set<TempNodePair>>();
42 Hashtable<FlatNode, Set<TempDescriptor>> nodetoconvs=new Hashtable<FlatNode, Set<TempDescriptor>>();
43 Hashtable<FlatNode, Set<TempDescriptor>> nodetoconvs2=new Hashtable<FlatNode, Set<TempDescriptor>>();
45 Set<FlatNode> toprocess=fm.getNodeSet();
47 while(!toprocess.isEmpty()) {
48 FlatNode fn=toprocess.iterator().next();
50 boolean isatomic=atomictab.get(fn).intValue()>0;
52 Hashtable<TempDescriptor, Integer> nodetemptab=temptab.get(fn);
54 List<TempDescriptor> reads=Arrays.asList(fn.readsTemps());
55 List<TempDescriptor> writes=Arrays.asList(fn.writesTemps());
57 if (!isatomic&&fn.kind()==FKind.FlatAtomicExitNode
58 &&!nodetoconvs.containsKey(fn)) {
59 nodetoconvs.put(fn, new HashSet<TempDescriptor>());
60 nodetoconvs2.put(fn, new HashSet<TempDescriptor>());
63 HashSet<TempNodePair> tempset=new HashSet<TempNodePair>();
65 for(int i=0; i<fn.numPrev(); i++) {
66 FlatNode fnprev=fn.getPrev(i);
67 if (!nodetotnpair.containsKey(fnprev))
70 Set<TempNodePair> prevset=nodetotnpair.get(fnprev);
71 for(Iterator<TempNodePair> it=prevset.iterator(); it.hasNext();) {
72 TempNodePair tnp=it.next();
73 if (fn.kind()==FKind.FlatGlobalConvNode&&
74 ((FlatGlobalConvNode)fn).getLocality()!=lb) {
79 if (reads.contains(tnp.getTemp())&&tnp.getNode()!=null) {
80 //Value actually is read...
81 nodetoconvs.get(tnp.getNode()).add(tnp.getTemp());
84 if (writes.contains(tnp.getTemp())) //value overwritten
86 if (!isatomic&&fn.kind()==FKind.FlatAtomicExitNode) {
87 //Create new node and tag it with this exit
88 if (tnp.getNode()==null) {
89 TempNodePair tnp2=new TempNodePair(tnp.getTemp());
92 nodetoconvs2.get(fn).add(tnp.getTemp()); //have to hide cached copies from gc
101 /* If this is in an atomic block, record temps that
104 /* NOTE: If this compiler is changed to maintain
105 * OID/Ptr's in variables, then we need to use all
106 * global temps that could be read and not just the
107 * ones converted by globalconvnode*/
109 if (fn.kind()!=FKind.FlatGlobalConvNode||
110 ((FlatGlobalConvNode)fn).getLocality()==lb) {
111 /*If globalconvnode, make sure we have the right
113 for(Iterator<TempDescriptor> writeit=writes.iterator(); writeit.hasNext();) {
114 TempDescriptor wrtmp=writeit.next();
115 if (nodetemptab.get(wrtmp)==LocalityAnalysis.GLOBAL) {
116 TempNodePair tnp=new TempNodePair(wrtmp);
122 if (!nodetotnpair.containsKey(fn)||!nodetotnpair.get(fn).equals(tempset)) {
123 //changes to set, so enqueue next nodes
124 nodetotnpair.put(fn, tempset); //update set
125 for(int i=0; i<fn.numNext(); i++) {
126 toprocess.add(fn.getNext(i));
130 //Place Convert to Oid nodes
131 toprocess=fm.getNodeSet();
132 for(Iterator<FlatNode> it=toprocess.iterator(); it.hasNext();) {
133 FlatNode fn=it.next();
134 if (atomictab.get(fn).intValue()==0&&fn.numPrev()>0&&
135 atomictab.get(fn.getPrev(0)).intValue()>0) {
137 assert(fn.kind()==FKind.FlatAtomicExitNode);
138 //insert calls here...
139 Set<TempDescriptor> tempset=nodetoconvs2.get(fn);
140 for(Iterator<TempDescriptor> tempit=tempset.iterator(); tempit.hasNext();) {
141 TempDescriptor tmpd=tempit.next();
142 FlatGlobalConvNode fgcn=new FlatGlobalConvNode(tmpd, lb, false, nodetoconvs.get(fn).containsKey(tmpd));
143 atomictab.put(fgcn, atomictab.get(fn));
144 temptab.put(fgcn, (Hashtable<TempDescriptor, Integer>)temptab.get(fn).clone());
146 for(int i=0; i<fn.numPrev(); i++) {
147 FlatNode fnprev=fn.getPrev(i);
148 for(int j=0; j<fnprev.numNext(); j++) {
149 if (fnprev.getNext(j)==fn) {
150 //found index, change node
151 fnprev.setNext(j, fgcn);
162 /* At the beginning of an atomic block, we need to convert any
163 * OID's that will be used in the atomic block to pointers */
165 private void converttoPtr(LocalityBinding lb) {
166 Hashtable<FlatNode, Set<TempDescriptor>> nodetotranstemps=new Hashtable<FlatNode, Set<TempDescriptor>>();
167 Hashtable<FlatNode, Integer> atomictab=locality.getAtomic(lb);
168 Hashtable<FlatNode, Hashtable<TempDescriptor, Integer>> temptab=locality.getNodeTempInfo(lb);
169 MethodDescriptor md=lb.getMethod();
170 FlatMethod fm=state.getMethodFlat(md);
171 Set<FlatNode> toprocess=fm.getNodeSet();
173 while(!toprocess.isEmpty()) {
174 FlatNode fn=toprocess.iterator().next();
175 toprocess.remove(fn);
177 if (atomictab.get(fn).intValue()>0) {
178 //build set of transaction temps use by next nodes
179 HashSet<TempDescriptor> transtemps=new HashSet<TempDescriptor>();
180 for(int i=0; i<fn.numNext(); i++) {
181 FlatNode fnnext=fn.getNext(i);
182 if (nodetotranstemps.containsKey(fnnext))
183 transtemps.addAll(nodetotranstemps.get(fnnext));
185 //subtract out the ones we write to
186 transtemps.removeAll(Arrays.asList(fn.writesTemps()));
187 //add in the globals we read from
188 Hashtable<TempDescriptor, Integer> pretemptab=locality.getNodePreTempInfo(lb, fn);
189 TempDescriptor [] readtemps=fn.readsTemps();
190 for(int i=0; i<readtemps.length; i++) {
191 TempDescriptor tmp=readtemps[i];
192 if (pretemptab.get(tmp).intValue()==LocalityAnalysis.GLOBAL) {
196 if (!nodetotranstemps.containsKey(fn)||!nodetotranstemps.get(fn).equals(transtemps)) {
197 nodetotranstemps.put(fn, transtemps);
198 for(int i=0; i<fn.numPrev(); i++)
199 toprocess.add(fn.getPrev(i));
203 toprocess=fm.getNodeSet();
204 for(Iterator<FlatNode> it=toprocess.iterator(); it.hasNext();) {
205 FlatNode fn=it.next();
206 if (atomictab.get(fn).intValue()>0&&
207 atomictab.get(fn.getPrev(0)).intValue()==0) {
209 assert(fn.kind()==FKind.FlatAtomicEnterNode);
211 //insert calls here...
212 Set<TempDescriptor> tempset=nodetotranstemps.get(fn);
213 for(Iterator<TempDescriptor> tempit=tempset.iterator(); tempit.hasNext();) {
214 FlatGlobalConvNode fgcn=new FlatGlobalConvNode(tempit.next(), lb, true);
215 atomictab.put(fgcn, atomictab.get(fn));
216 temptab.put(fgcn, (Hashtable<TempDescriptor, Integer>)temptab.get(fn).clone());
217 fgcn.addNext(fn.getNext(0));