import IR.TypeUtil;
import IR.MethodDescriptor;
import IR.Flat.*;
+import Analysis.Liveness;
import IR.ClassDescriptor;
public class LocalityAnalysis {
State state;
- Stack lbtovisit;
+ Set lbtovisit;
Hashtable<LocalityBinding,LocalityBinding> discovered;
Hashtable<LocalityBinding, Set<LocalityBinding>> dependence;
Hashtable<LocalityBinding, Set<LocalityBinding>> calldep;
public static final Integer EITHER=new Integer(2);
public static final Integer CONFLICT=new Integer(3);
+ public static final Integer STMEITHER=new Integer(0);
+ public static final Integer SCRATCH=new Integer(4);
+ public static final Integer NORMAL=new Integer(8);
+ public static final Integer STMCONFLICT=new Integer(12);
+
public LocalityAnalysis(State state, CallGraph callgraph, TypeUtil typeutil) {
this.typeutil=typeutil;
this.state=state;
this.calldep=new Hashtable<LocalityBinding, Set<LocalityBinding>>();
this.temptab=new Hashtable<LocalityBinding, Hashtable<FlatNode,Hashtable<TempDescriptor, Integer>>>();
this.atomictab=new Hashtable<LocalityBinding, Hashtable<FlatNode, Integer>>();
- this.lbtovisit=new Stack();
+ this.lbtovisit=new HashSet();
this.callgraph=callgraph;
this.tempstosave=new Hashtable<LocalityBinding, Hashtable<FlatAtomicEnterNode, Set<TempDescriptor>>>();
this.classtolb=new Hashtable<ClassDescriptor, Set<LocalityBinding>>();
public LocalityBinding getBinding(LocalityBinding currlb, FlatCall fc) {
boolean isatomic=getAtomic(currlb).get(fc).intValue()>0;
- Hashtable<TempDescriptor, Integer> currtable=state.DSM?getNodePreTempInfo(currlb,fc):null;
+ Hashtable<TempDescriptor, Integer> currtable=getNodePreTempInfo(currlb,fc);
MethodDescriptor md=fc.getMethod();
boolean isnative=md.getModifiers().isNative();
LocalityBinding lb=new LocalityBinding(md, isatomic);
- if (state.DSM) {
- for(int i=0; i<fc.numArgs(); i++) {
- TempDescriptor arg=fc.getArg(i);
- lb.setGlobal(i,currtable.get(arg));
- }
+ for(int i=0; i<fc.numArgs(); i++) {
+ TempDescriptor arg=fc.getArg(i);
+ lb.setGlobal(i,currtable.get(arg));
}
+
if (state.DSM&&fc.getThis()!=null) {
Integer thistype=currtable.get(fc.getThis());
if (thistype==null)
thistype=EITHER;
lb.setGlobalThis(thistype);
- } // else
+ } else if (state.SINGLETM&&fc.getThis()!=null) {
+ Integer thistype=currtable.get(fc.getThis());
+ if (thistype==null)
+ thistype=STMEITHER;
+ lb.setGlobalThis(thistype);
+ }
+ // else
// lb.setGlobalThis(EITHER);//default value
if (discovered.containsKey(lb))
lb=discovered.get(lb);
for(Iterator<TempDescriptor> tempit=prevtable.keySet().iterator(); tempit.hasNext();) {
TempDescriptor temp=tempit.next();
Integer tmpint=prevtable.get(temp);
- Integer oldint=currtable.containsKey(temp) ? currtable.get(temp) : EITHER;
- Integer newint=merge(tmpint, oldint);
+ Integer oldint=currtable.containsKey(temp) ? currtable.get(temp) : (state.DSM?EITHER:STMEITHER);
+ Integer newint=state.DSM?merge(tmpint, oldint):mergestm(tmpint, oldint);
currtable.put(temp, newint);
}
}
}
}
+ public MethodDescriptor getStart() {
+ ClassDescriptor cd=typeutil.getClass(TypeUtil.ThreadClass);
+ for(Iterator methodit=cd.getMethodTable().getSet("staticStart").iterator(); methodit
+.hasNext();) {
+ MethodDescriptor md=(MethodDescriptor) methodit.next();
+ if (md.numParameters()!=1||!md.getModifiers().isStatic()||!md.getParamType(0).getSymbol().equals(TypeUtil.ThreadClass))
+ continue;
+ return md;
+ }
+ throw new Error("Can't find Thread.run");
+ }
+
+
private void computeLocalityBindingsSTM() {
lbmain=new LocalityBinding(typeutil.getMain(), false);
+ lbmain.setGlobalReturn(STMEITHER);
+ lbmain.setGlobal(0, NORMAL);
lbtovisit.add(lbmain);
discovered.put(lbmain, lbmain);
if (!classtolb.containsKey(lbmain.getMethod().getClassDesc()))
methodtolb.get(lbmain.getMethod()).add(lbmain);
//Do this to force a virtual table number for the run method
- lbrun=new LocalityBinding(typeutil.getRun(), false);
+ lbrun=new LocalityBinding(getStart(), false);
+ lbrun.setGlobalReturn(STMEITHER);
+ lbrun.setGlobal(0,NORMAL);
lbtovisit.add(lbrun);
-
discovered.put(lbrun, lbrun);
if (!classtolb.containsKey(lbrun.getMethod().getClassDesc()))
classtolb.put(lbrun.getMethod().getClassDesc(), new HashSet<LocalityBinding>());
methodtolb.put(lbrun.getMethod(), new HashSet<LocalityBinding>());
methodtolb.get(lbrun.getMethod()).add(lbrun);
- while(!lbtovisit.empty()) {
- LocalityBinding lb=(LocalityBinding) lbtovisit.pop();
+ while(!lbtovisit.isEmpty()) {
+ LocalityBinding lb=(LocalityBinding) lbtovisit.iterator().next();
+ lbtovisit.remove(lb);
+
+ System.out.println("Analyzing "+lb);
+
Integer returnglobal=lb.getGlobalReturn();
MethodDescriptor md=lb.getMethod();
+ Hashtable<FlatNode,Hashtable<TempDescriptor, Integer>> temptable=new Hashtable<FlatNode,Hashtable<TempDescriptor, Integer>>();
Hashtable<FlatNode, Integer> atomictable=new Hashtable<FlatNode, Integer>();
calldep.remove(lb);
try {
- computeCallsFlagsSTM(md, lb, atomictable);
+ computeCallsFlagsSTM(md, lb, temptable, atomictable);
} catch (Error e) {
System.out.println("Error in "+md+" context "+lb);
e.printStackTrace();
System.exit(-1);
}
+ temptab.put(lb, temptable);
atomictab.put(lb, atomictable);
+
+ if (md.getReturnType()!=null&&md.getReturnType().isPtr()&&!returnglobal.equals(lb.getGlobalReturn())) {
+ //return type is more precise now
+ //rerun everything that call us
+ lbtovisit.addAll(dependence.get(lb));
+ }
}
}
- public void computeCallsFlagsSTM(MethodDescriptor md, LocalityBinding lb, Hashtable<FlatNode, Integer> atomictable) {
+ private static Integer mergestm(Integer a, Integer b) {
+ if (a==null||a.equals(STMEITHER))
+ return b;
+ if (b==null||b.equals(STMEITHER))
+ return a;
+ if (a.equals(b))
+ return a;
+ return STMCONFLICT;
+ }
+
+ public void computeCallsFlagsSTM(MethodDescriptor md, LocalityBinding lb, Hashtable<FlatNode, Hashtable<TempDescriptor, Integer>> temptable, Hashtable<FlatNode, Integer> atomictable) {
FlatMethod fm=state.getMethodFlat(md);
HashSet<FlatNode> tovisit=new HashSet<FlatNode>();
tovisit.add(fm.getNext(0));
- atomictable.put(fm, lb.isAtomic() ? 1 : 0);
+ {
+ // Build table for initial node
+ Hashtable<TempDescriptor,Integer> table=new Hashtable<TempDescriptor,Integer>();
+ temptable.put(fm, table);
+ atomictable.put(fm, lb.isAtomic() ? 1 : 0);
+ int offset=md.isStatic() ? 0 : 1;
+ if (!md.isStatic()) {
+ table.put(fm.getParameter(0), lb.getGlobalThis());
+ }
+ for(int i=offset; i<fm.numParameters(); i++) {
+ TempDescriptor temp=fm.getParameter(i);
+ Integer b=lb.isGlobal(i-offset);
+ if (b!=null)
+ table.put(temp,b);
+ }
+ }
while(!tovisit.isEmpty()) {
FlatNode fn=tovisit.iterator().next();
tovisit.remove(fn);
+ Hashtable<TempDescriptor, Integer> currtable=new Hashtable<TempDescriptor, Integer>();
int atomicstate=0;
for(int i=0; i<fn.numPrev(); i++) {
FlatNode prevnode=fn.getPrev(i);
if (atomictable.containsKey(prevnode)) {
atomicstate=atomictable.get(prevnode).intValue();
}
- }
- Integer oldatomic=atomictable.get(fn);
- if (oldatomic==null||!oldatomic.equals(atomicstate)) {
- //add in the next node
- for(int i=0;i<fn.numNext();i++) {
- tovisit.add(fn.getNext(i));
+ if (!temptable.containsKey(prevnode))
+ continue;
+ Hashtable<TempDescriptor, Integer> prevtable=temptable.get(prevnode);
+ for(Iterator<TempDescriptor> tempit=prevtable.keySet().iterator(); tempit.hasNext();) {
+ TempDescriptor temp=tempit.next();
+ Integer tmpint=prevtable.get(temp);
+ Integer oldint=currtable.containsKey(temp) ? currtable.get(temp) : STMEITHER;
+ Integer newint=mergestm(tmpint, oldint);
+ currtable.put(temp, newint);
}
- atomictable.put(fn, atomicstate);
}
+ atomictable.put(fn, atomicstate);
+
// Process this node
switch(fn.kind()) {
case FKind.FlatAtomicEnterNode:
break;
case FKind.FlatCall:
- processCallNodeSTM(lb, (FlatCall)fn, isAtomic(atomictable, fn));
+ processCallNodeSTM(lb, (FlatCall)fn, isAtomic(atomictable, fn), currtable, temptable.get(fn));
+ break;
+
+ case FKind.FlatNew:
+ processNewSTM(lb, (FlatNew) fn, currtable);
break;
- case FKind.FlatMethod:
- case FKind.FlatOffsetNode:
case FKind.FlatFieldNode:
+ processFieldNodeSTM(lb, (FlatFieldNode) fn, currtable);
+ break;
+
case FKind.FlatSetFieldNode:
- case FKind.FlatNew:
+ processSetFieldNodeSTM(lb, (FlatSetFieldNode) fn, currtable);
+ break;
+
+ case FKind.FlatSetElementNode:
+ processSetElementNodeSTM(lb, (FlatSetElementNode) fn, currtable);
+ break;
+
+ case FKind.FlatElementNode:
+ processElementNodeSTM(lb, (FlatElementNode) fn, currtable);
+ break;
+
case FKind.FlatOpNode:
+ processOpNodeSTM(lb, (FlatOpNode)fn, currtable);
+ break;
+
case FKind.FlatCastNode:
- case FKind.FlatLiteralNode:
+ processCastNodeSTM((FlatCastNode)fn, currtable);
+ break;
+
case FKind.FlatReturnNode:
- case FKind.FlatSetElementNode:
- case FKind.FlatElementNode:
+ processReturnNodeSTM(lb, (FlatReturnNode)fn, currtable);
+ break;
+
+ case FKind.FlatLiteralNode:
+ processLiteralNodeSTM((FlatLiteralNode)fn, currtable);
+ break;
+
+ case FKind.FlatMethod:
+ case FKind.FlatOffsetNode:
case FKind.FlatInstanceOfNode:
case FKind.FlatCondBranch:
case FKind.FlatBackEdge:
default:
throw new Error("In finding fn.kind()= " + fn.kind());
}
+
+
+
+ Hashtable<TempDescriptor,Integer> oldtable=temptable.get(fn);
+ if (oldtable==null||!oldtable.equals(currtable)) {
+ // Update table for this node
+ temptable.put(fn, currtable);
+ for(int i=0; i<fn.numNext(); i++) {
+ tovisit.add(fn.getNext(i));
+ }
+ }
}
}
- void processCallNodeSTM(LocalityBinding currlb, FlatCall fc, boolean isatomic) {
+ void processNewSTM(LocalityBinding lb, FlatNew fn, Hashtable<TempDescriptor, Integer> currtable) {
+ if (fn.isScratch())
+ currtable.put(fn.getDst(), SCRATCH);
+ else
+ currtable.put(fn.getDst(), NORMAL);
+ }
+
+ void processCallNodeSTM(LocalityBinding currlb, FlatCall fc, boolean isatomic, Hashtable<TempDescriptor, Integer> currtable, Hashtable<TempDescriptor, Integer> oldtable) {
MethodDescriptor nodemd=fc.getMethod();
Set methodset=null;
Set runmethodset=null;
assert(nodemd.getModifiers().isNative());
MethodDescriptor runmd=null;
- for(Iterator methodit=nodemd.getClassDesc().getMethodTable().getSet("run").iterator(); methodit.hasNext();) {
+ for(Iterator methodit=nodemd.getClassDesc().getMethodTable().getSet("staticStart").iterator(); methodit.hasNext();) {
MethodDescriptor md=(MethodDescriptor) methodit.next();
- if (md.numParameters()!=0||md.getModifiers().isStatic())
+ if (md.numParameters()!=1||!md.getModifiers().isStatic()||!md.getParamType(0).getSymbol().equals(TypeUtil.ThreadClass))
continue;
runmd=md;
break;
}
}
+ Integer currreturnval=STMEITHER; //Start off with the either value
+ if (oldtable!=null&&fc.getReturnTemp()!=null&&
+ oldtable.get(fc.getReturnTemp())!=null) {
+ //ensure termination
+ currreturnval=mergestm(currreturnval, oldtable.get(fc.getReturnTemp()));
+ }
+
for(Iterator methodit=methodset.iterator(); methodit.hasNext();) {
MethodDescriptor md=(MethodDescriptor) methodit.next();
System.out.println("Don't call native methods in atomic blocks!"+currlb.getMethod());
}
+ if (runmethodset==null||!runmethodset.contains(md)) {
+ for(int i=0; i<fc.numArgs(); i++) {
+ TempDescriptor arg=fc.getArg(i);
+ if (currtable.containsKey(arg))
+ lb.setGlobal(i,currtable.get(arg));
+ }
+ if (fc.getThis()!=null) {
+ Integer thistype=currtable.get(fc.getThis());
+ if (thistype==null)
+ thistype=STMEITHER;
+
+ if(thistype.equals(STMCONFLICT))
+ throw new Error("Using type that can be either normal or scratch in context:\n"+currlb.getExplanation());
+ lb.setGlobalThis(thistype);
+ }
+ } else {
+ Integer thistype=currtable.get(fc.getThis());
+ if (!thistype.equals(NORMAL)) {
+ throw new Error("Called start on possible scratch object");
+ }
+ lb.setGlobal(0,currtable.get(fc.getThis()));
+ }
//lb is built
if (!discovered.containsKey(lb)) {
+ if (isnative) {
+ if (nodemd.getReturnType()!=null&&nodemd.getReturnType().isPtr())
+ lb.setGlobalReturn(NORMAL);
+ } else
+ lb.setGlobalReturn(STMEITHER);
+
lb.setParent(currlb);
lbtovisit.add(lb);
discovered.put(lb, lb);
methodtolb.get(lb.getMethod()).add(lb);
} else
lb=discovered.get(lb);
-
+ Integer returnval=lb.getGlobalReturn();
+ currreturnval=mergestm(returnval, currreturnval);
if (!dependence.containsKey(lb))
dependence.put(lb, new HashSet<LocalityBinding>());
dependence.get(lb).add(currlb);
calldep.put(currlb, new HashSet<LocalityBinding>());
calldep.get(currlb).add(lb);
}
+ if (fc.getReturnTemp()!=null) {
+ currtable.put(fc.getReturnTemp(), currreturnval);
+ }
+ }
+
+ void processFieldNodeSTM(LocalityBinding lb, FlatFieldNode ffn, Hashtable<TempDescriptor, Integer> currtable) {
+ Integer type=currtable.get(ffn.getSrc());
+ TempDescriptor dst=ffn.getDst();
+ if (type.equals(SCRATCH)) {
+ currtable.put(dst,SCRATCH);
+ } else if (type.equals(NORMAL)) {
+ if (ffn.getField().getType().isPrimitive()&&!ffn.getField().getType().isArray())
+ currtable.put(dst, SCRATCH); // primitives are local
+ else
+ currtable.put(dst, NORMAL);
+ } else if (type.equals(STMEITHER)) {
+ if (ffn.getField().getType().isPrimitive()&&!ffn.getField().getType().isArray())
+ currtable.put(dst, SCRATCH); // primitives are local
+ else
+ currtable.put(dst, STMEITHER);
+ } else if (type.equals(STMCONFLICT)) {
+ throw new Error("Access to object that could be either normal or scratch in context:\n"+ffn+" "+lb.getExplanation());
+ }
+ }
+
+ //need to handle primitives
+ void processSetFieldNodeSTM(LocalityBinding lb, FlatSetFieldNode fsfn, Hashtable<TempDescriptor, Integer> currtable) {
+ Integer srctype=currtable.get(fsfn.getSrc());
+ Integer dsttype=currtable.get(fsfn.getDst());
+ if (!fsfn.getSrc().getType().isPtr())
+ return;
+
+ if (dsttype==null)
+ System.out.println(fsfn);
+ if (dsttype.equals(SCRATCH)) {
+ if (!(srctype.equals(SCRATCH)||srctype.equals(STMEITHER)))
+ throw new Error("Writing possible normal reference to scratch object in context: \n"+lb.getExplanation());
+ } else if (dsttype.equals(NORMAL)) {
+ //okay to store primitives in global object
+ if (!(srctype.equals(NORMAL)||srctype.equals(STMEITHER)))
+ throw new Error("Writing possible scratch reference to normal object in context:\n"+lb.getExplanation()+" for FlatFieldNode "+fsfn);
+ } else if (dsttype.equals(STMEITHER)) {
+ if (srctype.equals(STMCONFLICT))
+ throw new Error("Using reference that could be scratch or normal in context:\n"+lb.getExplanation());
+ } else if (dsttype.equals(STMCONFLICT)) {
+ throw new Error("Access to object that could be either scratch or normal in context:\n"+lb.getExplanation());
+ }
+ }
+
+ void processSetElementNodeSTM(LocalityBinding lb, FlatSetElementNode fsen, Hashtable<TempDescriptor, Integer> currtable) {
+ Integer srctype=currtable.get(fsen.getSrc());
+ Integer dsttype=currtable.get(fsen.getDst());
+ if (!fsen.getSrc().getType().isPtr())
+ return;
+
+ if (dsttype.equals(SCRATCH)) {
+ if (!(srctype.equals(SCRATCH)||srctype.equals(STMEITHER)))
+ throw new Error("Writing possible normal reference to scratch object in context:\n"+lb.getExplanation()+fsen);
+ } else if (dsttype.equals(NORMAL)) {
+ if (!(srctype.equals(NORMAL)||srctype.equals(STMEITHER)))
+ throw new Error("Writing possible scratch reference to normal object in context:\n"+lb.getExplanation());
+ } else if (dsttype.equals(STMEITHER)) {
+ if (srctype.equals(STMCONFLICT))
+ throw new Error("Using reference that could be scratch or normal in context:\n"+lb.getExplanation());
+ } else if (dsttype.equals(STMCONFLICT)) {
+ throw new Error("Access to object that could be either normal or scratch in context:\n"+lb.getExplanation());
+ }
+ }
+
+ void processOpNodeSTM(LocalityBinding lb, FlatOpNode fon, Hashtable<TempDescriptor, Integer> currtable) {
+ /* Just propagate value */
+ if (!fon.getLeft().getType().isPtr())
+ return;
+
+ Integer srcvalue=currtable.get(fon.getLeft());
+
+ if (srcvalue==null) {
+ System.out.println(fon);
+ MethodDescriptor md=lb.getMethod();
+ FlatMethod fm=state.getMethodFlat(md);
+ System.out.println(fm.printMethod());
+ throw new Error(fon.getLeft()+" is undefined!");
+ }
+ currtable.put(fon.getDest(), srcvalue);
+ }
+
+ void processCastNodeSTM(FlatCastNode fcn, Hashtable<TempDescriptor, Integer> currtable) {
+ if (currtable.containsKey(fcn.getSrc()))
+ currtable.put(fcn.getDst(), currtable.get(fcn.getSrc()));
+ }
+
+ void processReturnNodeSTM(LocalityBinding lb, FlatReturnNode frn, Hashtable<TempDescriptor, Integer> currtable) {
+ if(frn.getReturnTemp()!=null&&frn.getReturnTemp().getType().isPtr()) {
+ Integer returntype=currtable.get(frn.getReturnTemp());
+ lb.setGlobalReturn(mergestm(returntype, lb.getGlobalReturn()));
+ }
+ }
+
+ void processLiteralNodeSTM(FlatLiteralNode fln, Hashtable<TempDescriptor, Integer> currtable) {
+ //null is either
+ if (fln.getType().isNull())
+ currtable.put(fln.getDst(), STMEITHER);
+ else if (fln.getType().isPtr())
+ currtable.put(fln.getDst(), NORMAL);
+ }
+
+ void processElementNodeSTM(LocalityBinding lb, FlatElementNode fen, Hashtable<TempDescriptor, Integer> currtable) {
+ Integer type=currtable.get(fen.getSrc());
+ TempDescriptor dst=fen.getDst();
+ if (!fen.getDst().getType().isPtr())
+ return;
+
+ if (type==null) {
+ System.out.println(fen +" in "+lb+" may access undefined variable");
+ MethodDescriptor md=lb.getMethod();
+ FlatMethod fm=state.getMethodFlat(md);
+ System.out.println(fm.printMethod());
+ System.exit(-1);
+ } else if (type.equals(SCRATCH)) {
+ currtable.put(dst,SCRATCH);
+ } else if (type.equals(NORMAL)) {
+ currtable.put(dst, NORMAL);
+ } else if (type.equals(STMEITHER)) {
+ currtable.put(dst, STMEITHER);
+ } else if (type.equals(STMCONFLICT)) {
+ throw new Error("Access to object that could be either global or local in context:\n"+lb.getExplanation());
+ }
}
private void computeLocalityBindings() {
methodtolb.put(lbrun.getMethod(), new HashSet<LocalityBinding>());
methodtolb.get(lbrun.getMethod()).add(lbrun);
- while(!lbtovisit.empty()) {
- LocalityBinding lb=(LocalityBinding) lbtovisit.pop();
+ while(!lbtovisit.isEmpty()) {
+ LocalityBinding lb=(LocalityBinding) lbtovisit.iterator().next();
+ lbtovisit.remove(lb);
Integer returnglobal=lb.getGlobalReturn();
MethodDescriptor md=lb.getMethod();
Hashtable<FlatNode,Hashtable<TempDescriptor, Integer>> temptable=new Hashtable<FlatNode,Hashtable<TempDescriptor, Integer>>();
e.printStackTrace();
System.exit(-1);
}
- atomictab.put(lb, atomictable);
temptab.put(lb, temptable);
+ atomictab.put(lb, atomictable);
if (md.getReturnType()!=null&&!returnglobal.equals(lb.getGlobalReturn())) {
//return type is more precise now
throw new Error("Incompatible with tasks!");
case FKind.FlatMethod:
-
+ break;
case FKind.FlatOffsetNode:
processOffsetNode((FlatOffsetNode)fn, currtable);
int atomic=atomictable.get(fen).intValue();
atomictable.put(fen, new Integer(atomic-1));
}
-
- private Hashtable<FlatNode, Set<TempDescriptor>> computeLiveTemps(FlatMethod fm) {
- Hashtable<FlatNode, Set<TempDescriptor>> nodetotemps=new Hashtable<FlatNode, Set<TempDescriptor>>();
-
- Set<FlatNode> toprocess=fm.getNodeSet();
-
- while(!toprocess.isEmpty()) {
- FlatNode fn=toprocess.iterator().next();
- toprocess.remove(fn);
-
- List<TempDescriptor> reads=Arrays.asList(fn.readsTemps());
- List<TempDescriptor> writes=Arrays.asList(fn.writesTemps());
-
- HashSet<TempDescriptor> tempset=new HashSet<TempDescriptor>();
- for(int i=0; i<fn.numNext(); i++) {
- FlatNode fnnext=fn.getNext(i);
- if (nodetotemps.containsKey(fnnext))
- tempset.addAll(nodetotemps.get(fnnext));
- }
- tempset.removeAll(writes);
- tempset.addAll(reads);
- if (!nodetotemps.containsKey(fn)||
- !nodetotemps.get(fn).equals(tempset)) {
- nodetotemps.put(fn, tempset);
- for(int i=0; i<fn.numPrev(); i++)
- toprocess.add(fn.getPrev(i));
- }
- }
- return nodetotemps;
+
+ Hashtable<FlatNode, Set<TempDescriptor>> computeLiveTemps(FlatMethod fm) {
+ return Liveness.computeLiveTemps(fm);
}
private void computeTempstoSave() {
if (reads.contains(tmp)&&temptab.get(fn).get(tmp)==GLOBAL) {
nodetosavetemps.get(atomicnode).add(tmp);
}
- } else {
- if (reads.contains(tmp)&&tmp.getType().isPtr()) {
+ } else if (state.SINGLETM) {
+ if (reads.contains(tmp)&&tmp.getType().isPtr()&&temptab.get(fn).get(tmp)==NORMAL) {
nodetosavetemps.get(atomicnode).add(tmp);
}
}
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