7 public class BuildFlat {
10 MethodDescriptor currmd;
17 public BuildFlat(State st, TypeUtil typeutil) {
19 temptovar=new Hashtable();
20 this.typeutil=typeutil;
21 this.breakset=new HashSet();
22 this.continueset=new HashSet();
25 public Hashtable getMap() {
29 public void buildFlat() {
30 Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
32 ClassDescriptor cn=(ClassDescriptor)it.next();
36 Iterator task_it=state.getTaskSymbolTable().getDescriptorsIterator();
37 while(task_it.hasNext()) {
38 TaskDescriptor td=(TaskDescriptor)task_it.next();
43 private void flattenTask(TaskDescriptor td) {
44 BlockNode bn=state.getMethodBody(td);
45 NodePair np=flattenBlockNode(bn);
46 FlatNode fn=np.getBegin();
48 FlatNode fn2=np.getEnd();
50 if (fn2!=null&& fn2.kind()!=FKind.FlatReturnNode) {
51 FlatReturnNode rnflat=new FlatReturnNode(null);
56 FlatFlagActionNode ffan=new FlatFlagActionNode(FlatFlagActionNode.PRE);
59 FlatMethod fm=new FlatMethod(td, fe);
62 Hashtable visitedset=new Hashtable();
64 for(int i=0; i<td.numParameters(); i++) {
65 VarDescriptor paramvd=td.getParameter(i);
66 fm.addParameterTemp(getTempforVar(paramvd));
67 TagExpressionList tel=td.getTag(paramvd);
68 //BUG added next line to fix...to test feed in any task program
70 for(int j=0; j<tel.numTags(); j++) {
71 TagVarDescriptor tvd=(TagVarDescriptor) td.getParameterTable().getFromSameScope(tel.getName(j));
72 TempDescriptor tagtmp=getTempforVar(tvd);
73 if (!visitedset.containsKey(tvd.getName())) {
74 visitedset.put(tvd.getName(),tvd.getTag());
75 fm.addTagTemp(tagtmp);
77 TagDescriptor tmptd=(TagDescriptor) visitedset.get(tvd.getName());
78 if (!tmptd.equals(tvd.getTag()))
79 throw new Error("Two different tag types with same name as parameters to:"+td);
81 tel.setTemp(j, tagtmp);
85 /* Flatten Vector of Flag Effects */
86 Vector flags=td.getFlagEffects();
87 updateFlagActionNode(ffan,flags);
89 state.addFlatCode(td,fm);
93 /* This method transforms a vector of FlagEffects into the FlatFlagActionNode */
94 private void updateFlagActionNode(FlatFlagActionNode ffan, Vector flags) {
95 if (flags==null) // Do nothing if the flag effects vector is empty
98 for(int i=0; i<flags.size(); i++) {
99 FlagEffects fes=(FlagEffects)flags.get(i);
100 TempDescriptor flagtemp=getTempforVar(fes.getVar());
102 for(int j=0; j<fes.numEffects(); j++) {
103 FlagEffect fe=fes.getEffect(j);
104 ffan.addFlagAction(flagtemp, fe.getFlag(), fe.getStatus());
107 for(int j=0; j<fes.numTagEffects(); j++) {
108 TagEffect te=fes.getTagEffect(j);
109 TempDescriptor tagtemp=getTempforVar(te.getTag());
111 ffan.addTagAction(flagtemp, te.getTag().getTag(), tagtemp, te.getStatus());
116 FlatAtomicEnterNode curran=null;
118 private FlatNode spliceReturn(FlatNode fn) {
119 FlatReturnNode rnflat=null;
120 if (currmd.getReturnType()==null||currmd.getReturnType().isVoid()) {
121 rnflat=new FlatReturnNode(null);
124 TempDescriptor tmp=TempDescriptor.tempFactory("rettmp",currmd.getReturnType());
126 if (currmd.getReturnType().isPtr()) {
128 } else if (currmd.getReturnType().isByte()) {
130 } else if (currmd.getReturnType().isShort()) {
131 o=new Short((short)0);
132 } else if (currmd.getReturnType().isChar()) {
133 o=new Character('\0');
134 } else if (currmd.getReturnType().isInt()) {
136 } else if (currmd.getReturnType().isLong()) {
138 } else if (currmd.getReturnType().isBoolean()) {
139 o=new Boolean(false);
140 } else if (currmd.getReturnType().isFloat()) {
142 } else if (currmd.getReturnType().isDouble()) {
147 FlatLiteralNode fln=new FlatLiteralNode(currmd.getReturnType(),o,tmp);
148 rnflat=new FlatReturnNode(tmp);
155 private void flattenClass(ClassDescriptor cn) {
156 Iterator methodit=cn.getMethods();
157 while(methodit.hasNext()) {
158 currmd=(MethodDescriptor)methodit.next();
160 // if OOOJava is on, splice a special SESE in to
161 // enclose the main method
162 boolean spliceInImplicitMain =
164 currmd.equals( typeutil.getMain() );
166 FlatSESEEnterNode spliceSESE = null;
167 FlatSESEExitNode spliceExit = null;
169 if( spliceInImplicitMain ) {
170 SESENode mainTree = new SESENode( "main" );
171 spliceSESE = new FlatSESEEnterNode( mainTree );
172 spliceExit = new FlatSESEExitNode ( mainTree );
173 spliceSESE.setFlatExit ( spliceExit );
174 spliceExit.setFlatEnter( spliceSESE );
175 spliceSESE.setIsMainSESE();
181 BlockNode bn=state.getMethodBody(currmd);
183 if (state.DSM&&currmd.getModifiers().isAtomic()) {
184 curran=new FlatAtomicEnterNode();
187 NodePair np=flattenBlockNode(bn);
188 FlatNode fn=np.getBegin();
189 if ((state.THREAD||state.MGC)&&currmd.getModifiers().isSynchronized()) {
190 MethodDescriptor memd=(MethodDescriptor)typeutil.getClass("Object").getMethodTable().get("MonitorEnter");
191 TempDescriptor thistd=null;
192 if(currmd.getModifiers().isStatic()) {
193 // need to lock the Class object
194 thistd=new TempDescriptor("classobj", cn);
197 thistd=getTempforVar(currmd.getThis());
199 FlatCall fc = new FlatCall(memd, null, thistd, new TempDescriptor[0]);
202 if (np.getEnd()!=null&&np.getEnd().kind()!=FKind.FlatReturnNode) {
203 MethodDescriptor memdex=(MethodDescriptor)typeutil.getClass("Object").getMethodTable().get("MonitorExit");
204 FlatCall fcunlock=new FlatCall(memdex, null, thistd, new TempDescriptor[0]);
205 np.getEnd().addNext(fcunlock);
206 FlatNode rnflat=spliceReturn(fcunlock);
209 } else if (state.DSM&&currmd.getModifiers().isAtomic()) {
212 if (np.getEnd()!=null&&np.getEnd().kind()!=FKind.FlatReturnNode) {
213 FlatAtomicExitNode aen=new FlatAtomicExitNode(curran);
214 np.getEnd().addNext(aen);
215 FlatNode rnflat=spliceReturn(aen);
219 } else if (np.getEnd()!=null&&np.getEnd().kind()!=FKind.FlatReturnNode) {
220 FlatNode rnflat=null;
221 if( spliceInImplicitMain ) {
222 np.getEnd().addNext(spliceExit);
223 rnflat=spliceReturn(spliceExit);
225 rnflat=spliceReturn(np.getEnd());
228 } else if (np.getEnd()!=null) {
229 if( spliceInImplicitMain ) {
230 FlatReturnNode rnflat=(FlatReturnNode)np.getEnd();
231 np.getEnd().addNext(spliceExit);
232 spliceExit.addNext(fe);
236 if( spliceInImplicitMain ) {
237 spliceSESE.addNext(fn);
241 FlatMethod fm=new FlatMethod(currmd, fe);
243 if (!currmd.isStatic())
244 fm.addParameterTemp(getTempforParam(currmd.getThis()));
245 for(int i=0; i<currmd.numParameters(); i++) {
246 fm.addParameterTemp(getTempforParam(currmd.getParameter(i)));
249 state.addFlatCode(currmd,fm);
253 private NodePair flattenBlockNode(BlockNode bn) {
256 for(int i=0; i<bn.size(); i++) {
257 NodePair np=flattenBlockStatementNode(bn.get(i));
258 FlatNode np_begin=np.getBegin();
259 FlatNode np_end=np.getEnd();
266 end.addNext(np_begin);
268 return new NodePair(begin, null);
274 end=begin=new FlatNop();
276 return new NodePair(begin,end);
279 private NodePair flattenBlockExpressionNode(BlockExpressionNode en) {
280 //System.out.println("DEBUG -> inside flattenBlockExpressionNode\n");
281 TempDescriptor tmp=TempDescriptor.tempFactory("neverused",en.getExpression().getType());
282 return flattenExpressionNode(en.getExpression(),tmp);
285 private NodePair flattenCastNode(CastNode cn,TempDescriptor out_temp) {
286 TempDescriptor tmp=TempDescriptor.tempFactory("tocast",cn.getExpression().getType());
287 NodePair np=flattenExpressionNode(cn.getExpression(), tmp);
288 FlatCastNode fcn=new FlatCastNode(cn.getType(), tmp, out_temp);
289 np.getEnd().addNext(fcn);
290 return new NodePair(np.getBegin(),fcn);
293 private NodePair flattenLiteralNode(LiteralNode ln,TempDescriptor out_temp) {
294 FlatLiteralNode fln=new FlatLiteralNode(ln.getType(), ln.getValue(), out_temp);
295 return new NodePair(fln,fln);
298 private NodePair flattenOffsetNode(OffsetNode ofn, TempDescriptor out_temp) {
299 FlatOffsetNode fln = new FlatOffsetNode(ofn.getClassType(), ofn.getField(), out_temp);
300 return new NodePair(fln, fln);
303 private NodePair flattenCreateObjectNode(CreateObjectNode con,TempDescriptor out_temp) {
304 TypeDescriptor td=con.getType();
306 FlatNode fn=new FlatNew(td, out_temp, con.isGlobal(), con.getDisjointId());
308 //handle wrapper fields
309 ClassDescriptor cd=td.getClassDesc();
310 for(Iterator fieldit=cd.getFields();fieldit.hasNext();) {
311 FieldDescriptor fd=(FieldDescriptor)fieldit.next();
312 if (fd.getType().iswrapper()) {
313 TempDescriptor wrap_tmp=TempDescriptor.tempFactory("wrapper_obj",fd.getType());
314 FlatNode fnwrapper=new FlatNew(fd.getType(), wrap_tmp, con.isGlobal());
315 FlatSetFieldNode fsfn=new FlatSetFieldNode(out_temp, fd, wrap_tmp);
316 last.addNext(fnwrapper);
317 fnwrapper.addNext(fsfn);
322 TempDescriptor[] temps=new TempDescriptor[con.numArgs()];
325 for(int i=0; i<con.numArgs(); i++) {
326 ExpressionNode en=con.getArg(i);
327 TempDescriptor tmp=TempDescriptor.tempFactory("arg",en.getType());
329 NodePair np=flattenExpressionNode(en, tmp);
330 last.addNext(np.getBegin());
333 MethodDescriptor md=con.getConstructor();
334 //Call to constructor
335 FlatCall fc=new FlatCall(md, null, out_temp, temps);
338 if (td.getClassDesc().hasFlags()) {
339 // if (con.getFlagEffects()!=null) {
340 FlatFlagActionNode ffan=new FlatFlagActionNode(FlatFlagActionNode.NEWOBJECT);
341 FlagEffects fes=con.getFlagEffects();
342 TempDescriptor flagtemp=out_temp;
344 for(int j=0; j<fes.numEffects(); j++) {
345 FlagEffect fe=fes.getEffect(j);
346 ffan.addFlagAction(flagtemp, fe.getFlag(), fe.getStatus());
348 for(int j=0; j<fes.numTagEffects(); j++) {
349 TagEffect te=fes.getTagEffect(j);
350 TempDescriptor tagtemp=getTempforVar(te.getTag());
352 ffan.addTagAction(flagtemp, te.getTag().getTag(), tagtemp, te.getStatus());
355 ffan.addFlagAction(flagtemp, null, false);
360 return new NodePair(fn,last);
362 if(con.getArrayInitializer() == null) {
365 TempDescriptor[] temps=new TempDescriptor[con.numArgs()];
366 for (int i=0; i<con.numArgs(); i++) {
367 ExpressionNode en=con.getArg(i);
368 TempDescriptor tmp=TempDescriptor.tempFactory("arg",en.getType());
370 NodePair np=flattenExpressionNode(en, tmp);
374 last.addNext(np.getBegin());
377 TempDescriptor tmp2=(i==0) ?
379 TempDescriptor.tempFactory("arg",en.getType());
381 FlatNew fn=new FlatNew(td, out_temp, temps[0], con.isGlobal(), con.getDisjointId());
383 if (temps.length>1) {
384 NodePair np=generateNewArrayLoop(temps, td.dereference(), out_temp, 0, con.isGlobal());
385 fn.addNext(np.getBegin());
386 return new NodePair(first,np.getEnd());
387 } else if (td.isArray()&&td.dereference().iswrapper()) {
388 NodePair np=generateNewArrayLoop(temps, td.dereference(), out_temp, 0, con.isGlobal());
389 fn.addNext(np.getBegin());
390 return new NodePair(first,np.getEnd());
392 return new NodePair(first, fn);
393 } else if(state.MGC) {
394 // array creation with initializers
395 return flattenArrayInitializerNode(con.getArrayInitializer(), out_temp);
401 private NodePair generateNewArrayLoop(TempDescriptor[] temparray, TypeDescriptor td, TempDescriptor tmp, int i, boolean isglobal) {
402 TempDescriptor index=TempDescriptor.tempFactory("index",new TypeDescriptor(TypeDescriptor.INT));
403 TempDescriptor tmpone=TempDescriptor.tempFactory("index",new TypeDescriptor(TypeDescriptor.INT));
404 FlatNop fnop=new FlatNop(); //last node
407 FlatLiteralNode fln=new FlatLiteralNode(index.getType(),new Integer(0),index);
409 FlatLiteralNode fln2=new FlatLiteralNode(tmpone.getType(),new Integer(1),tmpone);
411 TempDescriptor tmpbool=TempDescriptor.tempFactory("comp",new TypeDescriptor(TypeDescriptor.BOOLEAN));
413 FlatOpNode fcomp=new FlatOpNode(tmpbool,index,temparray[i],new Operation(Operation.LT));
414 FlatCondBranch fcb=new FlatCondBranch(tmpbool);
415 fcb.setTrueProb(State.TRUEPROB);
418 TempDescriptor new_tmp=TempDescriptor.tempFactory("tmp",td);
419 FlatNew fn=td.iswrapper()?new FlatNew(td, new_tmp, isglobal):new FlatNew(td, new_tmp, temparray[i+1], isglobal);
420 FlatSetElementNode fsen=new FlatSetElementNode(tmp,index,new_tmp);
422 FlatOpNode fon=new FlatOpNode(index,index,tmpone,new Operation(Operation.ADD));
428 fcb.addFalseNext(fnop);
430 //Recursive call here
431 if ((i+2)<temparray.length) {
432 NodePair np2=generateNewArrayLoop(temparray, td.dereference(), new_tmp, i+1, isglobal);
433 fsen.addNext(np2.getBegin());
434 np2.getEnd().addNext(fon);
435 } else if (td.isArray()&&td.dereference().iswrapper()) {
436 NodePair np2=generateNewArrayLoop(temparray, td.dereference(), new_tmp, i+1, isglobal);
437 fsen.addNext(np2.getBegin());
438 np2.getEnd().addNext(fon);
443 return new NodePair(fln, fnop);
446 private NodePair flattenMethodInvokeNode(MethodInvokeNode min,TempDescriptor out_temp) {
447 TempDescriptor[] temps=new TempDescriptor[min.numArgs()];
450 TempDescriptor thisarg=null;
452 if (min.getExpression()!=null) {
453 TypeDescriptor mtd = min.getExpression().getType();
454 if(state.MGC && mtd.isClass() && mtd.getClassDesc().isEnum()) {
455 mtd = new TypeDescriptor(TypeDescriptor.INT);
457 thisarg=TempDescriptor.tempFactory("thisarg", mtd);
458 NodePair np=flattenExpressionNode(min.getExpression(),thisarg);
464 for(int i=0; i<min.numArgs(); i++) {
465 ExpressionNode en=min.getArg(i);
466 TypeDescriptor etd = en.getType();
467 if(state.MGC && etd.isClass() && etd.getClassDesc().isEnum()) {
468 etd = new TypeDescriptor(TypeDescriptor.INT);
470 TempDescriptor td=TempDescriptor.tempFactory("arg", etd);
472 NodePair np=flattenExpressionNode(en, td);
476 last.addNext(np.getBegin());
480 MethodDescriptor md=min.getMethod();
482 //Call to constructor
485 if(md.getReturnType()==null||md.getReturnType().isVoid())
486 fc=new FlatCall(md, null, thisarg, temps);
488 fc=new FlatCall(md, out_temp, thisarg, temps);
493 return new NodePair(first,fc);
496 private NodePair flattenFieldAccessNode(FieldAccessNode fan,TempDescriptor out_temp) {
497 TempDescriptor tmp=null;
498 if(fan.getExpression().getType().isClassNameRef()) {
499 // static field dereference with class name
500 tmp = new TempDescriptor(fan.getExpression().getType().getClassDesc().getSymbol(), fan.getExpression().getType());
501 FlatFieldNode fn=new FlatFieldNode(fan.getField(),tmp,out_temp);
502 return new NodePair(fn,fn);
504 tmp=TempDescriptor.tempFactory("temp",fan.getExpression().getType());
505 NodePair npe=flattenExpressionNode(fan.getExpression(),tmp);
506 FlatFieldNode fn=new FlatFieldNode(fan.getField(),tmp,out_temp);
507 npe.getEnd().addNext(fn);
508 return new NodePair(npe.getBegin(),fn);
512 private NodePair flattenArrayAccessNode(ArrayAccessNode aan,TempDescriptor out_temp) {
513 TempDescriptor tmp=TempDescriptor.tempFactory("temp",aan.getExpression().getType());
514 TempDescriptor tmpindex=TempDescriptor.tempFactory("temp",aan.getIndex().getType());
515 NodePair npe=flattenExpressionNode(aan.getExpression(),tmp);
516 NodePair npi=flattenExpressionNode(aan.getIndex(),tmpindex);
517 TempDescriptor arraytmp=out_temp;
518 if (aan.iswrapper()) {
520 arraytmp=TempDescriptor.tempFactory("temp", aan.getExpression().getType().dereference());
522 FlatNode fn=new FlatElementNode(tmp,tmpindex,arraytmp);
523 npe.getEnd().addNext(npi.getBegin());
524 npi.getEnd().addNext(fn);
525 if (aan.iswrapper()) {
526 FlatFieldNode ffn=new FlatFieldNode((FieldDescriptor)aan.getExpression().getType().dereference().getClassDesc().getFieldTable().get("value") ,arraytmp,out_temp);
530 return new NodePair(npe.getBegin(),fn);
533 private NodePair flattenAssignmentNode(AssignmentNode an,TempDescriptor out_temp) {
535 // left side is variable
536 // left side is field
537 // left side is array
539 Operation base=an.getOperation().getBaseOp();
540 boolean pre=base==null||(base.getOp()!=Operation.POSTINC&&base.getOp()!=Operation.POSTDEC);
543 //rewrite the base operation
544 base=base.getOp()==Operation.POSTINC ? new Operation(Operation.ADD) : new Operation(Operation.SUB);
548 TempDescriptor src_tmp = src_tmp=an.getSrc()==null ? TempDescriptor.tempFactory("srctmp",an.getDest().getType()) : TempDescriptor.tempFactory("srctmp",an.getSrc().getType());
551 if (an.getSrc()!=null) {
552 if(an.getSrc().getEval() != null) {
553 first = last = new FlatLiteralNode(an.getSrc().getType(), an.getSrc().getEval().longValue(), src_tmp);
555 NodePair np_src=flattenExpressionNode(an.getSrc(),src_tmp);
556 first=np_src.getBegin();
557 last=np_src.getEnd();
560 FlatLiteralNode fln=new FlatLiteralNode(new TypeDescriptor(TypeDescriptor.INT),new Integer(1),src_tmp);
565 if (an.getDest().kind()==Kind.FieldAccessNode) {
566 //We are assigning an object field
568 FieldAccessNode fan=(FieldAccessNode)an.getDest();
569 ExpressionNode en=fan.getExpression();
570 TempDescriptor dst_tmp=null;
571 NodePair np_baseexp=null;
572 if(en.getType().isClassNameRef()) {
573 // static field dereference with class name
574 dst_tmp = new TempDescriptor(en.getType().getClassDesc().getSymbol(), en.getType());
575 FlatNop nop=new FlatNop();
576 np_baseexp = new NodePair(nop,nop);
578 dst_tmp=TempDescriptor.tempFactory("dst",en.getType());
579 np_baseexp=flattenExpressionNode(en, dst_tmp);
582 first=np_baseexp.getBegin();
584 last.addNext(np_baseexp.getBegin());
585 last=np_baseexp.getEnd();
587 //See if we need to perform an operation
589 //If it is a preinc we need to store the initial value
590 TempDescriptor src_tmp2=pre ? TempDescriptor.tempFactory("src",an.getDest().getType()) : out_temp;
591 TempDescriptor tmp=TempDescriptor.tempFactory("srctmp3_",an.getDest().getType());
592 FlatFieldNode ffn=new FlatFieldNode(fan.getField(), dst_tmp, src_tmp2);
596 if (base.getOp()==Operation.ADD&&an.getDest().getType().isString()) {
597 ClassDescriptor stringcd=typeutil.getClass(TypeUtil.StringClass);
598 MethodDescriptor concatmd=typeutil.getMethod(stringcd, "concat2", new TypeDescriptor[] {new TypeDescriptor(stringcd), new TypeDescriptor(stringcd)});
599 FlatCall fc=new FlatCall(concatmd, tmp, null, new TempDescriptor[] {src_tmp2, src_tmp});
604 FlatOpNode fon=new FlatOpNode(tmp, src_tmp2, src_tmp, base);
611 FlatSetFieldNode fsfn=new FlatSetFieldNode(dst_tmp, fan.getField(), src_tmp);
615 FlatOpNode fon2=new FlatOpNode(out_temp, src_tmp, null, new Operation(Operation.ASSIGN));
619 return new NodePair(first, last);
620 } else if (an.getDest().kind()==Kind.ArrayAccessNode) {
621 //We are assigning an array element
623 ArrayAccessNode aan=(ArrayAccessNode)an.getDest();
624 ExpressionNode en=aan.getExpression();
625 ExpressionNode enindex=aan.getIndex();
626 TempDescriptor dst_tmp=TempDescriptor.tempFactory("dst",en.getType());
627 TempDescriptor index_tmp=TempDescriptor.tempFactory("index",enindex.getType());
628 NodePair np_baseexp=flattenExpressionNode(en, dst_tmp);
629 NodePair np_indexexp=flattenExpressionNode(enindex, index_tmp);
631 first=np_baseexp.getBegin();
633 last.addNext(np_baseexp.getBegin());
634 np_baseexp.getEnd().addNext(np_indexexp.getBegin());
635 last=np_indexexp.getEnd();
637 //See if we need to perform an operation
639 //If it is a preinc we need to store the initial value
640 TempDescriptor src_tmp2=pre ? TempDescriptor.tempFactory("src",an.getDest().getType()) : out_temp;
641 TempDescriptor tmp=TempDescriptor.tempFactory("srctmp3_",an.getDest().getType());
643 if (aan.iswrapper()) {
644 TypeDescriptor arrayeltype=aan.getExpression().getType().dereference();
645 TempDescriptor src_tmp3=TempDescriptor.tempFactory("src3",arrayeltype);
646 FlatElementNode fen=new FlatElementNode(dst_tmp, index_tmp, src_tmp3);
647 FlatFieldNode ffn=new FlatFieldNode((FieldDescriptor)arrayeltype.getClassDesc().getFieldTable().get("value"),src_tmp3,src_tmp2);
652 FlatElementNode fen=new FlatElementNode(dst_tmp, index_tmp, src_tmp2);
656 if (base.getOp()==Operation.ADD&&an.getDest().getType().isString()) {
657 ClassDescriptor stringcd=typeutil.getClass(TypeUtil.StringClass);
658 MethodDescriptor concatmd=typeutil.getMethod(stringcd, "concat2", new TypeDescriptor[] {new TypeDescriptor(stringcd), new TypeDescriptor(stringcd)});
659 FlatCall fc=new FlatCall(concatmd, tmp, null, new TempDescriptor[] {src_tmp2, src_tmp});
664 FlatOpNode fon=new FlatOpNode(tmp, src_tmp2, src_tmp, base);
671 if (aan.iswrapper()) {
672 TypeDescriptor arrayeltype=aan.getExpression().getType().dereference();
673 TempDescriptor src_tmp3=TempDescriptor.tempFactory("src3",arrayeltype);
674 FlatElementNode fen=new FlatElementNode(dst_tmp, index_tmp, src_tmp3);
675 FlatSetFieldNode fsfn=new FlatSetFieldNode(src_tmp3,(FieldDescriptor)arrayeltype.getClassDesc().getFieldTable().get("value"),src_tmp);
680 FlatSetElementNode fsen=new FlatSetElementNode(dst_tmp, index_tmp, src_tmp);
685 FlatOpNode fon2=new FlatOpNode(out_temp, src_tmp, null, new Operation(Operation.ASSIGN));
689 return new NodePair(first, last);
690 } else if (an.getDest().kind()==Kind.NameNode) {
691 //We could be assigning a field or variable
692 NameNode nn=(NameNode)an.getDest();
695 if (nn.getExpression()!=null) {
697 FieldAccessNode fan=(FieldAccessNode)nn.getExpression();
698 ExpressionNode en=fan.getExpression();
699 TempDescriptor dst_tmp=null;
700 NodePair np_baseexp=null;
701 if(en.getType().isClassNameRef()) {
702 // static field dereference with class name
703 dst_tmp = new TempDescriptor(en.getType().getClassDesc().getSymbol(), en.getType());
704 FlatNop nop=new FlatNop();
705 np_baseexp = new NodePair(nop,nop);
707 dst_tmp=TempDescriptor.tempFactory("dst",en.getType());
708 np_baseexp=flattenExpressionNode(en, dst_tmp);
711 first=np_baseexp.getBegin();
713 last.addNext(np_baseexp.getBegin());
714 last=np_baseexp.getEnd();
716 //See if we need to perform an operation
718 //If it is a preinc we need to store the initial value
719 TempDescriptor src_tmp2=pre ? TempDescriptor.tempFactory("src",an.getDest().getType()) : out_temp;
720 TempDescriptor tmp=TempDescriptor.tempFactory("srctmp3_",an.getDest().getType());
722 FlatFieldNode ffn=new FlatFieldNode(fan.getField(), dst_tmp, src_tmp2);
727 if (base.getOp()==Operation.ADD&&an.getDest().getType().isString()) {
728 ClassDescriptor stringcd=typeutil.getClass(TypeUtil.StringClass);
729 MethodDescriptor concatmd=typeutil.getMethod(stringcd, "concat2", new TypeDescriptor[] {new TypeDescriptor(stringcd), new TypeDescriptor(stringcd)});
730 FlatCall fc=new FlatCall(concatmd, tmp, null, new TempDescriptor[] {src_tmp2, src_tmp});
735 FlatOpNode fon=new FlatOpNode(tmp, src_tmp2, src_tmp, base);
743 FlatSetFieldNode fsfn=new FlatSetFieldNode(dst_tmp, fan.getField(), src_tmp);
747 FlatOpNode fon2=new FlatOpNode(out_temp, src_tmp, null, new Operation(Operation.ASSIGN));
751 return new NodePair(first, last);
753 if (nn.getField()!=null) {
757 //See if we need to perform an operation
759 //If it is a preinc we need to store the initial value
760 TempDescriptor src_tmp2=pre ? TempDescriptor.tempFactory("src",an.getDest().getType()) : out_temp;
761 TempDescriptor tmp=TempDescriptor.tempFactory("srctmp3_",an.getDest().getType());
763 TempDescriptor ftmp= null;
764 if(state.MGC && (nn.getClassDesc() != null)) {
765 // this is a static field
766 ftmp = new TempDescriptor(nn.getClassDesc().getSymbol(), nn.getClassType());
769 ftmp=getTempforVar(nn.getVar());
771 FlatFieldNode ffn=new FlatFieldNode(nn.getField(), ftmp, src_tmp2);
781 if (base.getOp()==Operation.ADD&&an.getDest().getType().isString()) {
782 ClassDescriptor stringcd=typeutil.getClass(TypeUtil.StringClass);
783 MethodDescriptor concatmd=typeutil.getMethod(stringcd, "concat2", new TypeDescriptor[] {new TypeDescriptor(stringcd), new TypeDescriptor(stringcd)});
784 FlatCall fc=new FlatCall(concatmd, tmp, null, new TempDescriptor[] {src_tmp2, src_tmp});
789 FlatOpNode fon=new FlatOpNode(tmp, src_tmp2, src_tmp, base);
796 FlatSetFieldNode fsfn=null;
797 if(nn.getClassDesc()!=null) {
798 // this is a static field access inside of a static block
799 fsfn=new FlatSetFieldNode(new TempDescriptor("sfsb", nn.getClassType()), nn.getField(), src_tmp);
801 fsfn=new FlatSetFieldNode(getTempforVar(nn.getVar()), nn.getField(), src_tmp);
810 FlatOpNode fon2=new FlatOpNode(out_temp, src_tmp, null, new Operation(Operation.ASSIGN));
814 return new NodePair(first, last);
817 //See if we need to perform an operation
820 //If it is a preinc we need to store the initial value
821 TempDescriptor src_tmp2=getTempforVar(nn.getVar());
822 TempDescriptor tmp=TempDescriptor.tempFactory("srctmp3_",an.getDest().getType());
824 FlatOpNode fon=new FlatOpNode(out_temp, src_tmp2, null, new Operation(Operation.ASSIGN));
833 if (base.getOp()==Operation.ADD&&an.getDest().getType().isString()) {
834 ClassDescriptor stringcd=typeutil.getClass(TypeUtil.StringClass);
835 MethodDescriptor concatmd=typeutil.getMethod(stringcd, "concat2", new TypeDescriptor[] {new TypeDescriptor(stringcd), new TypeDescriptor(stringcd)});
836 FlatCall fc=new FlatCall(concatmd, tmp, null, new TempDescriptor[] {src_tmp2, src_tmp});
844 FlatOpNode fon=new FlatOpNode(tmp, src_tmp2, src_tmp, base);
854 FlatOpNode fon=new FlatOpNode(getTempforVar(nn.getVar()), src_tmp, null, new Operation(Operation.ASSIGN));
859 FlatOpNode fon2=new FlatOpNode(out_temp, src_tmp, null, new Operation(Operation.ASSIGN));
863 return new NodePair(first, last);
871 private NodePair flattenNameNode(NameNode nn,TempDescriptor out_temp) {
872 if (nn.getExpression()!=null) {
873 /* Hack - use subtree instead */
874 return flattenExpressionNode(nn.getExpression(),out_temp);
875 } else if (nn.getField()!=null) {
876 TempDescriptor tmp= null;
877 if(state.MGC && (nn.getClassDesc() != null)) {
878 // this is a static field
879 tmp = new TempDescriptor(nn.getClassDesc().getSymbol(), nn.getClassType());
882 tmp=getTempforVar(nn.getVar());
884 FlatFieldNode ffn=new FlatFieldNode(nn.getField(), tmp, out_temp);
885 return new NodePair(ffn,ffn);
887 TempDescriptor tmp=getTempforVar(nn.isTag() ? nn.getTagVar() : nn.getVar());
890 out_temp.setTag(tmp.getTag());
892 FlatOpNode fon=new FlatOpNode(out_temp, tmp, null, new Operation(Operation.ASSIGN));
893 return new NodePair(fon,fon);
897 private NodePair flattenOpNode(OpNode on,TempDescriptor out_temp) {
898 TempDescriptor temp_left=TempDescriptor.tempFactory("leftop",on.getLeft().getType());
899 TempDescriptor temp_right=null;
901 Operation op=on.getOp();
903 NodePair left=flattenExpressionNode(on.getLeft(),temp_left);
905 if (on.getRight()!=null) {
906 temp_right=TempDescriptor.tempFactory("rightop",on.getRight().getType());
907 right=flattenExpressionNode(on.getRight(),temp_right);
909 FlatNop nop=new FlatNop();
910 right=new NodePair(nop,nop);
913 if (op.getOp()==Operation.LOGIC_OR) {
914 /* Need to do shortcircuiting */
915 FlatCondBranch fcb=new FlatCondBranch(temp_left);
916 FlatOpNode fon1=new FlatOpNode(out_temp,temp_left,null,new Operation(Operation.ASSIGN));
917 FlatOpNode fon2=new FlatOpNode(out_temp,temp_right,null,new Operation(Operation.ASSIGN));
918 FlatNop fnop=new FlatNop();
919 left.getEnd().addNext(fcb);
920 fcb.addFalseNext(right.getBegin());
921 right.getEnd().addNext(fon2);
923 fcb.addTrueNext(fon1);
925 return new NodePair(left.getBegin(), fnop);
926 } else if (op.getOp()==Operation.LOGIC_AND) {
927 /* Need to do shortcircuiting */
928 FlatCondBranch fcb=new FlatCondBranch(temp_left);
929 FlatOpNode fon1=new FlatOpNode(out_temp,temp_left,null,new Operation(Operation.ASSIGN));
930 FlatOpNode fon2=new FlatOpNode(out_temp,temp_right,null,new Operation(Operation.ASSIGN));
931 FlatNop fnop=new FlatNop();
932 left.getEnd().addNext(fcb);
933 fcb.addTrueNext(right.getBegin());
934 right.getEnd().addNext(fon2);
936 fcb.addFalseNext(fon1);
938 return new NodePair(left.getBegin(), fnop);
939 } else if (op.getOp()==Operation.ADD&&on.getLeft().getType().isString()) {
940 //We have a string concatenate
941 ClassDescriptor stringcd=typeutil.getClass(TypeUtil.StringClass);
942 MethodDescriptor concatmd=typeutil.getMethod(stringcd, "concat", new TypeDescriptor[] {new TypeDescriptor(stringcd)});
943 FlatCall fc=new FlatCall(concatmd, out_temp, temp_left, new TempDescriptor[] {temp_right});
944 left.getEnd().addNext(right.getBegin());
945 right.getEnd().addNext(fc);
946 return new NodePair(left.getBegin(), fc);
949 FlatOpNode fon=new FlatOpNode(out_temp,temp_left,temp_right,op);
950 left.getEnd().addNext(right.getBegin());
951 right.getEnd().addNext(fon);
952 return new NodePair(left.getBegin(),fon);
955 private NodePair flattenExpressionNode(ExpressionNode en, TempDescriptor out_temp) {
957 case Kind.AssignmentNode:
958 return flattenAssignmentNode((AssignmentNode)en,out_temp);
961 return flattenCastNode((CastNode)en,out_temp);
963 case Kind.CreateObjectNode:
964 return flattenCreateObjectNode((CreateObjectNode)en,out_temp);
966 case Kind.FieldAccessNode:
967 return flattenFieldAccessNode((FieldAccessNode)en,out_temp);
969 case Kind.ArrayAccessNode:
970 return flattenArrayAccessNode((ArrayAccessNode)en,out_temp);
972 case Kind.LiteralNode:
973 return flattenLiteralNode((LiteralNode)en,out_temp);
975 case Kind.MethodInvokeNode:
976 return flattenMethodInvokeNode((MethodInvokeNode)en,out_temp);
979 return flattenNameNode((NameNode)en,out_temp);
982 return flattenOpNode((OpNode)en,out_temp);
984 case Kind.OffsetNode:
985 return flattenOffsetNode((OffsetNode)en,out_temp);
987 case Kind.TertiaryNode:
988 return flattenTertiaryNode((TertiaryNode)en,out_temp);
990 case Kind.InstanceOfNode:
991 return flattenInstanceOfNode((InstanceOfNode)en,out_temp);
993 case Kind.ArrayInitializerNode:
994 return flattenArrayInitializerNode((ArrayInitializerNode)en,out_temp);
999 private NodePair flattenDeclarationNode(DeclarationNode dn) {
1000 VarDescriptor vd=dn.getVarDescriptor();
1001 TempDescriptor td=getTempforVar(vd);
1002 if (dn.getExpression()!=null)
1003 return flattenExpressionNode(dn.getExpression(),td);
1005 FlatNop fn=new FlatNop();
1006 return new NodePair(fn,fn);
1010 private NodePair flattenTagDeclarationNode(TagDeclarationNode dn) {
1011 TagVarDescriptor tvd=dn.getTagVarDescriptor();
1012 TagDescriptor tag=tvd.getTag();
1013 TempDescriptor tmp=getTempforVar(tvd);
1014 FlatTagDeclaration ftd=new FlatTagDeclaration(tag, tmp);
1015 return new NodePair(ftd,ftd);
1018 private TempDescriptor getTempforParam(Descriptor d) {
1019 if (temptovar.containsKey(d))
1020 return (TempDescriptor)temptovar.get(d);
1022 if (d instanceof VarDescriptor) {
1023 VarDescriptor vd=(VarDescriptor)d;
1024 TempDescriptor td=TempDescriptor.paramtempFactory(vd.getName(),vd.getType());
1025 temptovar.put(vd,td);
1027 } else if (d instanceof TagVarDescriptor) {
1028 TagVarDescriptor tvd=(TagVarDescriptor)d;
1029 TypeDescriptor tagtype=new TypeDescriptor(typeutil.getClass(TypeUtil.TagClass));
1030 TempDescriptor td=TempDescriptor.paramtempFactory(tvd.getName(), tagtype, tvd.getTag());
1031 temptovar.put(tvd,td);
1033 } else throw new Error("Unreconized Descriptor");
1037 private TempDescriptor getTempforVar(Descriptor d) {
1038 if (temptovar.containsKey(d))
1039 return (TempDescriptor)temptovar.get(d);
1041 if (d instanceof VarDescriptor) {
1042 VarDescriptor vd=(VarDescriptor)d;
1043 TempDescriptor td=TempDescriptor.tempFactory(vd.getName(), vd.getType());
1044 temptovar.put(vd,td);
1046 } else if (d instanceof TagVarDescriptor) {
1047 TagVarDescriptor tvd=(TagVarDescriptor)d;
1048 //BUGFIX TAGTYPE - add next line, modify following
1049 //line to tag this new type descriptor, modify
1050 //TempDescriptor constructor & factory to set type
1051 //using this Type To test, use any program with tags
1052 TypeDescriptor tagtype=new TypeDescriptor(typeutil.getClass(TypeUtil.TagClass));
1053 TempDescriptor td=TempDescriptor.tempFactory(tvd.getName(),tagtype, tvd.getTag());
1054 temptovar.put(tvd,td);
1056 } else throw new Error("Unrecognized Descriptor");
1060 private NodePair flattenIfStatementNode(IfStatementNode isn) {
1061 TempDescriptor cond_temp=TempDescriptor.tempFactory("condition",new TypeDescriptor(TypeDescriptor.BOOLEAN));
1062 NodePair cond=flattenExpressionNode(isn.getCondition(),cond_temp);
1063 FlatCondBranch fcb=new FlatCondBranch(cond_temp);
1064 NodePair true_np=flattenBlockNode(isn.getTrueBlock());
1066 FlatNop nopend=new FlatNop();
1068 if (isn.getFalseBlock()!=null)
1069 false_np=flattenBlockNode(isn.getFalseBlock());
1071 FlatNop nop=new FlatNop();
1072 false_np=new NodePair(nop,nop);
1075 cond.getEnd().addNext(fcb);
1076 fcb.addTrueNext(true_np.getBegin());
1077 fcb.addFalseNext(false_np.getBegin());
1078 if (true_np.getEnd()!=null)
1079 true_np.getEnd().addNext(nopend);
1080 if (false_np.getEnd()!=null)
1081 false_np.getEnd().addNext(nopend);
1082 if (nopend.numPrev()==0)
1083 return new NodePair(cond.getBegin(), null);
1085 return new NodePair(cond.getBegin(), nopend);
1088 private NodePair flattenSwitchStatementNode(SwitchStatementNode ssn) {
1089 TempDescriptor cond_temp=TempDescriptor.tempFactory("condition",new TypeDescriptor(TypeDescriptor.INT));
1090 NodePair cond=flattenExpressionNode(ssn.getCondition(),cond_temp);
1091 FlatNop nopend=new FlatNop();
1092 NodePair sbody = flattenSwitchBodyNode(ssn.getSwitchBody(), cond_temp, nopend);
1094 cond.getEnd().addNext(sbody.getBegin());
1096 return new NodePair(cond.getBegin(), sbody.getEnd());
1099 private NodePair flattenSwitchBodyNode(BlockNode bn, TempDescriptor cond_temp, FlatNode endnode) {
1100 FlatNode begin=null;
1101 FlatNode end=endnode;
1102 NodePair prev_true_branch = null;
1103 NodePair prev_false_branch = null;
1104 for(int i=0; i<bn.size(); i++) {
1105 SwitchBlockNode sbn = (SwitchBlockNode)bn.get(i);
1106 HashSet oldbs=breakset;
1107 breakset=new HashSet();
1109 NodePair body=flattenBlockNode(sbn.getSwitchBlockStatement());
1110 Vector<SwitchLabelNode> slnv = sbn.getSwitchConditions();
1111 FlatNode cond_begin = null;
1112 NodePair prev_fnp = null;
1113 for(int j = 0; j < slnv.size(); j++) {
1114 SwitchLabelNode sln = slnv.elementAt(j);
1115 NodePair left = null;
1116 NodePair false_np = null;
1117 if(sln.isDefault()) {
1120 TempDescriptor cond_tmp=TempDescriptor.tempFactory("condition", new TypeDescriptor(TypeDescriptor.BOOLEAN));
1121 TempDescriptor temp_left=TempDescriptor.tempFactory("leftop", sln.getCondition().getType());
1122 Operation op=new Operation(Operation.EQUAL);
1123 left=flattenExpressionNode(sln.getCondition(), temp_left);
1124 FlatOpNode fon=new FlatOpNode(cond_tmp, temp_left, cond_temp, op);
1125 left.getEnd().addNext(fon);
1127 FlatCondBranch fcb=new FlatCondBranch(cond_tmp);
1128 fcb.setTrueProb(State.TRUEPROB);
1130 FlatNop nop=new FlatNop();
1131 false_np=new NodePair(nop,nop);
1134 fcb.addTrueNext(body.getBegin());
1135 fcb.addFalseNext(false_np.getBegin());
1137 if((prev_fnp != null) && (prev_fnp.getEnd() != null)) {
1138 prev_fnp.getEnd().addNext(left.getBegin());
1140 prev_fnp = false_np;
1143 begin = left.getBegin();
1145 if(cond_begin == null) {
1146 cond_begin = left.getBegin();
1149 if((prev_false_branch != null) && (prev_false_branch.getEnd() != null)) {
1150 prev_false_branch.getEnd().addNext(cond_begin);
1152 prev_false_branch = prev_fnp;
1153 if((prev_true_branch != null) && (prev_true_branch.getEnd() != null)) {
1154 prev_true_branch.getEnd().addNext(body.getBegin());
1156 prev_true_branch = body;
1157 for(Iterator breakit=breakset.iterator();breakit.hasNext();) {
1158 FlatNode fn=(FlatNode)breakit.next();
1160 fn.addNext(endnode);
1164 if((prev_true_branch != null) && (prev_true_branch.getEnd() != null)) {
1165 prev_true_branch.getEnd().addNext(endnode);
1167 if((prev_false_branch != null) && (prev_false_branch.getEnd() != null)) {
1168 prev_false_branch.getEnd().addNext(endnode);
1171 end=begin=new FlatNop();
1173 return new NodePair(begin,end);
1176 private NodePair flattenLoopNode(LoopNode ln) {
1177 HashSet oldbs=breakset;
1178 HashSet oldcs=continueset;
1179 breakset=new HashSet();
1180 continueset=new HashSet();
1182 if (ln.getType()==LoopNode.FORLOOP) {
1183 NodePair initializer=flattenBlockNode(ln.getInitializer());
1184 TempDescriptor cond_temp=TempDescriptor.tempFactory("condition", new TypeDescriptor(TypeDescriptor.BOOLEAN));
1185 NodePair condition=flattenExpressionNode(ln.getCondition(),cond_temp);
1186 NodePair update=flattenBlockNode(ln.getUpdate());
1187 NodePair body=flattenBlockNode(ln.getBody());
1188 FlatNode begin=initializer.getBegin();
1189 FlatCondBranch fcb=new FlatCondBranch(cond_temp);
1190 fcb.setTrueProb(State.TRUEPROB);
1192 FlatNop nopend=new FlatNop();
1193 FlatBackEdge backedge=new FlatBackEdge();
1195 FlatNop nop2=new FlatNop();
1196 initializer.getEnd().addNext(nop2);
1197 nop2.addNext(condition.getBegin());
1198 if (body.getEnd()!=null)
1199 body.getEnd().addNext(update.getBegin());
1200 update.getEnd().addNext(backedge);
1201 backedge.addNext(condition.getBegin());
1202 condition.getEnd().addNext(fcb);
1203 fcb.addFalseNext(nopend);
1204 fcb.addTrueNext(body.getBegin());
1205 for(Iterator contit=continueset.iterator();contit.hasNext();) {
1206 FlatNode fn=(FlatNode)contit.next();
1208 fn.addNext(update.getBegin());
1210 for(Iterator breakit=breakset.iterator();breakit.hasNext();) {
1211 FlatNode fn=(FlatNode)breakit.next();
1217 return new NodePair(begin,nopend);
1218 } else if (ln.getType()==LoopNode.WHILELOOP) {
1219 TempDescriptor cond_temp=TempDescriptor.tempFactory("condition", new TypeDescriptor(TypeDescriptor.BOOLEAN));
1220 NodePair condition=flattenExpressionNode(ln.getCondition(),cond_temp);
1221 NodePair body=flattenBlockNode(ln.getBody());
1222 FlatNode begin=condition.getBegin();
1223 FlatCondBranch fcb=new FlatCondBranch(cond_temp);
1224 fcb.setTrueProb(State.TRUEPROB);
1226 FlatNop nopend=new FlatNop();
1227 FlatBackEdge backedge=new FlatBackEdge();
1229 if (body.getEnd()!=null)
1230 body.getEnd().addNext(backedge);
1231 backedge.addNext(condition.getBegin());
1233 condition.getEnd().addNext(fcb);
1234 fcb.addFalseNext(nopend);
1235 fcb.addTrueNext(body.getBegin());
1237 for(Iterator contit=continueset.iterator();contit.hasNext();) {
1238 FlatNode fn=(FlatNode)contit.next();
1240 fn.addNext(backedge);
1242 for(Iterator breakit=breakset.iterator();breakit.hasNext();) {
1243 FlatNode fn=(FlatNode)breakit.next();
1249 return new NodePair(begin,nopend);
1250 } else if (ln.getType()==LoopNode.DOWHILELOOP) {
1251 TempDescriptor cond_temp=TempDescriptor.tempFactory("condition", new TypeDescriptor(TypeDescriptor.BOOLEAN));
1252 NodePair condition=flattenExpressionNode(ln.getCondition(),cond_temp);
1253 NodePair body=flattenBlockNode(ln.getBody());
1254 FlatNode begin=body.getBegin();
1255 FlatCondBranch fcb=new FlatCondBranch(cond_temp);
1256 fcb.setTrueProb(State.TRUEPROB);
1258 FlatNop nopend=new FlatNop();
1259 FlatBackEdge backedge=new FlatBackEdge();
1261 if (body.getEnd()!=null)
1262 body.getEnd().addNext(condition.getBegin());
1263 condition.getEnd().addNext(fcb);
1264 fcb.addFalseNext(nopend);
1265 fcb.addTrueNext(backedge);
1266 backedge.addNext(body.getBegin());
1268 for(Iterator contit=continueset.iterator();contit.hasNext();) {
1269 FlatNode fn=(FlatNode)contit.next();
1271 fn.addNext(condition.getBegin());
1273 for(Iterator breakit=breakset.iterator();breakit.hasNext();) {
1274 FlatNode fn=(FlatNode)breakit.next();
1280 return new NodePair(begin,nopend);
1281 } else throw new Error();
1284 private NodePair flattenReturnNode(ReturnNode rntree) {
1285 TempDescriptor retval=null;
1287 if (rntree.getReturnExpression()!=null) {
1288 retval=TempDescriptor.tempFactory("ret_value", rntree.getReturnExpression().getType());
1289 cond=flattenExpressionNode(rntree.getReturnExpression(),retval);
1292 FlatReturnNode rnflat=new FlatReturnNode(retval);
1295 if ((state.THREAD||state.MGC)&&currmd.getModifiers().isSynchronized()) {
1296 MethodDescriptor memd=(MethodDescriptor)typeutil.getClass("Object").getMethodTable().get("MonitorExit");
1297 TempDescriptor thistd=null;
1298 if(currmd.getModifiers().isStatic()) {
1299 // need to lock the Class object
1300 thistd=new TempDescriptor("classobj", currmd.getClassDesc());
1303 thistd=getTempforVar(currmd.getThis());
1305 FlatCall fc=new FlatCall(memd, null, thistd, new TempDescriptor[0]);
1309 if (state.DSM&&currmd.getModifiers().isAtomic()) {
1310 FlatAtomicExitNode faen=new FlatAtomicExitNode(curran);
1316 cond.getEnd().addNext(ln);
1317 return new NodePair(cond.getBegin(),null);
1319 return new NodePair(ln,null);
1322 private NodePair flattenTaskExitNode(TaskExitNode ten) {
1323 FlatFlagActionNode ffan=new FlatFlagActionNode(FlatFlagActionNode.TASKEXIT);
1324 ffan.setTaskExitIndex(ten.getTaskExitIndex());
1325 updateFlagActionNode(ffan, ten.getFlagEffects());
1326 NodePair fcn=flattenConstraintCheck(ten.getChecks());
1327 ffan.addNext(fcn.getBegin());
1328 FlatReturnNode rnflat=new FlatReturnNode(null);
1330 fcn.getEnd().addNext(rnflat);
1331 return new NodePair(ffan, null);
1334 private NodePair flattenConstraintCheck(Vector ccs) {
1335 FlatNode begin=new FlatNop();
1337 return new NodePair(begin,begin);
1338 FlatNode last=begin;
1339 for(int i=0; i<ccs.size(); i++) {
1340 ConstraintCheck cc=(ConstraintCheck) ccs.get(i);
1341 /* Flatten the arguments */
1342 TempDescriptor[] temps=new TempDescriptor[cc.numArgs()];
1343 String[] vars=new String[cc.numArgs()];
1344 for(int j=0; j<cc.numArgs(); j++) {
1345 ExpressionNode en=cc.getArg(j);
1346 TempDescriptor td=TempDescriptor.tempFactory("arg",en.getType());
1348 vars[j]=cc.getVar(j);
1349 NodePair np=flattenExpressionNode(en, td);
1350 last.addNext(np.getBegin());
1354 FlatCheckNode fcn=new FlatCheckNode(cc.getSpec(), vars, temps);
1358 return new NodePair(begin,last);
1361 private NodePair flattenSubBlockNode(SubBlockNode sbn) {
1362 return flattenBlockNode(sbn.getBlockNode());
1365 private NodePair flattenSynchronizedNode(SynchronizedNode sbn) {
1366 TempDescriptor montmp=null;
1367 FlatNode first = null;
1368 FlatNode end = null;
1369 if(sbn.getExpr() instanceof ClassTypeNode) {
1370 montmp=new TempDescriptor("classobj", ((ClassTypeNode)sbn.getExpr()).getType().getClassDesc());
1372 montmp = TempDescriptor.tempFactory("monitor",sbn.getExpr().getType());
1373 NodePair npexp=flattenExpressionNode(sbn.getExpr(), montmp);
1374 first = npexp.getBegin();
1375 end = npexp.getEnd();
1377 NodePair npblock=flattenBlockNode(sbn.getBlockNode());
1379 MethodDescriptor menmd=(MethodDescriptor)typeutil.getClass("Object").getMethodTable().get("MonitorEnter");
1380 FlatCall fcen=new FlatCall(menmd, null, montmp, new TempDescriptor[0]);
1382 MethodDescriptor mexmd=(MethodDescriptor)typeutil.getClass("Object").getMethodTable().get("MonitorExit");
1383 FlatCall fcex=new FlatCall(mexmd, null, montmp, new TempDescriptor[0]);
1390 fcen.addNext(npblock.getBegin());
1391 if(npblock.getEnd() != null) {
1392 npblock.getEnd().addNext(fcex);
1394 return new NodePair(first, fcex);
1397 private NodePair flattenAtomicNode(AtomicNode sbn) {
1398 NodePair np=flattenBlockNode(sbn.getBlockNode());
1399 FlatAtomicEnterNode faen=new FlatAtomicEnterNode();
1400 FlatAtomicExitNode faexn=new FlatAtomicExitNode(faen);
1401 faen.addNext(np.getBegin());
1402 np.getEnd().addNext(faexn);
1403 return new NodePair(faen, faexn);
1406 private NodePair flattenGenReachNode( GenReachNode grn ) {
1407 FlatGenReachNode fgrn = new FlatGenReachNode( grn.getGraphName() );
1408 return new NodePair( fgrn, fgrn );
1411 private NodePair flattenSESENode(SESENode sn) {
1412 if( sn.isStart() ) {
1413 FlatSESEEnterNode fsen=new FlatSESEEnterNode(sn);
1414 sn.setFlatEnter(fsen);
1415 return new NodePair(fsen, fsen);
1418 FlatSESEExitNode fsexn=new FlatSESEExitNode(sn);
1419 sn.setFlatExit(fsexn);
1420 FlatSESEEnterNode fsen=sn.getStart().getFlatEnter();
1421 fsexn.setFlatEnter(fsen);
1422 sn.getStart().getFlatEnter().setFlatExit( fsexn );
1424 return new NodePair(fsexn, fsexn);
1427 private NodePair flattenContinueBreakNode(ContinueBreakNode cbn) {
1428 FlatNop fn=new FlatNop();
1432 continueset.add(fn);
1433 return new NodePair(fn,null);
1436 private NodePair flattenInstanceOfNode(InstanceOfNode tn, TempDescriptor out_temp) {
1437 TempDescriptor expr_temp=TempDescriptor.tempFactory("expr",tn.getExpr().getType());
1438 NodePair cond=flattenExpressionNode(tn.getExpr(), expr_temp);
1439 FlatInstanceOfNode fion=new FlatInstanceOfNode(tn.getExprType(), expr_temp, out_temp);
1440 cond.getEnd().addNext(fion);
1441 return new NodePair(cond.getBegin(),fion);
1444 private NodePair flattenArrayInitializerNode(ArrayInitializerNode ain, TempDescriptor out_temp) {
1445 boolean isGlobal = false;
1446 String disjointId = null;
1447 // get the type the array to be initialized
1448 TypeDescriptor td = ain.getType();
1450 // create a new array of size equal to the array initializer
1451 FlatNode first=null;
1453 TempDescriptor tmp=TempDescriptor.tempFactory("arg", new TypeDescriptor(TypeDescriptor.INT));
1454 FlatLiteralNode fln_tmp=new FlatLiteralNode(tmp.getType(), new Integer(ain.numVarInitializers()), tmp);
1455 first = last=fln_tmp;
1457 // create the new array
1458 FlatNew fn=new FlatNew(td, out_temp, tmp, isGlobal, disjointId);
1462 // initialize the new array
1463 for(int i = 0; i < ain.numVarInitializers(); i++) {
1464 ExpressionNode var_init_node = ain.getVarInitializer(i);
1465 TempDescriptor tmp_toinit = out_temp;
1466 TempDescriptor tmp_init=TempDescriptor.tempFactory("array_init", td.dereference());
1468 TempDescriptor index=TempDescriptor.tempFactory("index", new TypeDescriptor(TypeDescriptor.INT));
1469 FlatLiteralNode fln=new FlatLiteralNode(index.getType(), new Integer(i), index);
1470 // calculate the initial value
1471 NodePair np_init = flattenExpressionNode(var_init_node, tmp_init);
1472 // TODO wrapper class process is missing now
1473 /*if(td.isArray() && td.dereference().iswrapper()) {
1475 FlatSetElementNode fsen=new FlatSetElementNode(tmp_toinit, index, tmp_init);
1477 fln.addNext(np_init.getBegin());
1478 np_init.getEnd().addNext(fsen);
1482 return new NodePair(first, last);
1485 private NodePair flattenTertiaryNode(TertiaryNode tn, TempDescriptor out_temp) {
1486 TempDescriptor cond_temp=TempDescriptor.tempFactory("tert_cond",new TypeDescriptor(TypeDescriptor.BOOLEAN));
1487 TempDescriptor true_temp=TempDescriptor.tempFactory("tert_true",tn.getTrueExpr().getType());
1488 TempDescriptor fals_temp=TempDescriptor.tempFactory("tert_fals",tn.getFalseExpr().getType());
1490 NodePair cond=flattenExpressionNode(tn.getCond(),cond_temp);
1491 FlatCondBranch fcb=new FlatCondBranch(cond_temp);
1493 NodePair trueExpr=flattenExpressionNode(tn.getTrueExpr(),true_temp);
1494 FlatOpNode fonT=new FlatOpNode(out_temp, true_temp, null, new Operation(Operation.ASSIGN));
1496 NodePair falseExpr=flattenExpressionNode(tn.getFalseExpr(),fals_temp);
1497 FlatOpNode fonF=new FlatOpNode(out_temp, fals_temp, null, new Operation(Operation.ASSIGN));
1499 FlatNop nopend=new FlatNop();
1501 cond.getEnd().addNext(fcb);
1503 fcb.addTrueNext(trueExpr.getBegin());
1504 fcb.addFalseNext(falseExpr.getBegin());
1506 trueExpr.getEnd().addNext(fonT);
1507 fonT.addNext(nopend);
1509 falseExpr.getEnd().addNext(fonF);
1510 fonF.addNext(nopend);
1512 return new NodePair(cond.getBegin(), nopend);
1515 private NodePair flattenBlockStatementNode(BlockStatementNode bsn) {
1516 switch(bsn.kind()) {
1517 case Kind.BlockExpressionNode:
1518 return flattenBlockExpressionNode((BlockExpressionNode)bsn);
1520 case Kind.DeclarationNode:
1521 return flattenDeclarationNode((DeclarationNode)bsn);
1523 case Kind.TagDeclarationNode:
1524 return flattenTagDeclarationNode((TagDeclarationNode)bsn);
1526 case Kind.IfStatementNode:
1527 return flattenIfStatementNode((IfStatementNode)bsn);
1529 case Kind.SwitchStatementNode:
1530 return flattenSwitchStatementNode((SwitchStatementNode)bsn);
1533 return flattenLoopNode((LoopNode)bsn);
1535 case Kind.ReturnNode:
1536 return flattenReturnNode((IR.Tree.ReturnNode)bsn);
1538 case Kind.TaskExitNode:
1539 return flattenTaskExitNode((IR.Tree.TaskExitNode)bsn);
1541 case Kind.SubBlockNode:
1542 return flattenSubBlockNode((SubBlockNode)bsn);
1544 case Kind.AtomicNode:
1545 return flattenAtomicNode((AtomicNode)bsn);
1547 case Kind.SynchronizedNode:
1548 return flattenSynchronizedNode((SynchronizedNode)bsn);
1551 return flattenSESENode((SESENode)bsn);
1553 case Kind.GenReachNode:
1554 return flattenGenReachNode((GenReachNode)bsn);
1556 case Kind.ContinueBreakNode:
1557 return flattenContinueBreakNode((ContinueBreakNode)bsn);