+++ /dev/null
-package IR.Flat;
-import IR.*;
-import IR.Tree.*;
-import java.util.*;
-
-public class BuildFlat {
- State state;
- Hashtable temptovar;
-
- public BuildFlat(State st) {
- state=st;
- temptovar=new Hashtable();
- }
-
- public Hashtable getMap() {
- return temptovar;
- }
-
- public void buildFlat() {
- Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
- while(it.hasNext()) {
- ClassDescriptor cn=(ClassDescriptor)it.next();
- flattenClass(cn);
- }
-
- Iterator task_it=state.getTaskSymbolTable().getDescriptorsIterator();
- while(task_it.hasNext()) {
- TaskDescriptor td=(TaskDescriptor)task_it.next();
- flattenTask(td);
- }
- }
-
- private void flattenTask(TaskDescriptor td) {
- BlockNode bn=state.getMethodBody(td);
- FlatNode fn=flattenBlockNode(bn).getBegin();
- FlatFlagActionNode ffan=new FlatFlagActionNode(false);
- ffan.addNext(fn);
- FlatMethod fm=new FlatMethod(td, ffan);
-
- for(int i=0;i<td.numParameters();i++) {
- fm.addParameterTemp(getTempforVar(td.getParameter(i)));
- }
-
- /* Flatten Vector of Flag Effects */
- Vector flags=td.getFlagEffects();
- updateFlagActionNode(ffan,flags);
-
- state.addFlatCode(td,fm);
- }
-
-
- /* This method transforms a vector of FlagEffects into the FlatFlagActionNode */
- private void updateFlagActionNode(FlatFlagActionNode ffan, Vector flags) {
- for(int i=0;i<flags.size();i++) {
- FlagEffects fes=(FlagEffects)flags.get(i);
- TempDescriptor flagtemp=getTempforVar(fes.getVar());
- for(int j=0;j<fes.numEffects();j++) {
- FlagEffect fe=fes.getEffect(j);
- ffan.addFlagAction(flagtemp, fe.getFlag(), fe.getStatus());
- }
- }
- }
-
- private void flattenClass(ClassDescriptor cn) {
- Iterator methodit=cn.getMethods();
- while(methodit.hasNext()) {
- MethodDescriptor md=(MethodDescriptor)methodit.next();
- BlockNode bn=state.getMethodBody(md);
- FlatNode fn=flattenBlockNode(bn).getBegin();
- FlatMethod fm=new FlatMethod(md, fn);
- if (!md.isStatic())
- fm.addParameterTemp(getTempforVar(md.getThis()));
- for(int i=0;i<md.numParameters();i++) {
- fm.addParameterTemp(getTempforVar(md.getParameter(i)));
- }
- System.out.println(fm.printMethod());
- state.addFlatCode(md,fm);
- }
- }
-
- private NodePair flattenBlockNode(BlockNode bn) {
- FlatNode begin=null;
- FlatNode end=null;
- for(int i=0;i<bn.size();i++) {
- NodePair np=flattenBlockStatementNode(bn.get(i));
- FlatNode np_begin=np.getBegin();
- FlatNode np_end=np.getEnd();
- if (begin==null) {
- begin=np_begin;
- }
- if (end==null) {
- end=np_end;
- } else {
- end.addNext(np_begin);
- end=np_end;
- }
- }
- if (begin==null) {
- end=begin=new FlatNop();
- }
- return new NodePair(begin,end);
- }
-
- private NodePair flattenBlockExpressionNode(BlockExpressionNode en) {
- TempDescriptor tmp=TempDescriptor.tempFactory("neverused",en.getExpression().getType());
- return flattenExpressionNode(en.getExpression(),tmp);
- }
-
- private NodePair flattenCastNode(CastNode cn,TempDescriptor out_temp) {
- TempDescriptor tmp=TempDescriptor.tempFactory("tocast",cn.getExpression().getType());
- NodePair np=flattenExpressionNode(cn.getExpression(), tmp);
- FlatCastNode fcn=new FlatCastNode(cn.getType(), tmp, out_temp);
- np.getEnd().addNext(fcn);
- return new NodePair(np.getBegin(),fcn);
- }
-
- private NodePair flattenLiteralNode(LiteralNode ln,TempDescriptor out_temp) {
- FlatLiteralNode fln=new FlatLiteralNode(ln.getType(), ln.getValue(), out_temp);
- return new NodePair(fln,fln);
- }
-
- private NodePair flattenCreateObjectNode(CreateObjectNode con,TempDescriptor out_temp) {
- TypeDescriptor td=con.getType();
- if (!td.isArray()) {
- FlatNew fn=new FlatNew(td, out_temp);
- TempDescriptor[] temps=new TempDescriptor[con.numArgs()];
- FlatNode last=fn;
- //Build arguments
- for(int i=0;i<con.numArgs();i++) {
- ExpressionNode en=con.getArg(i);
- TempDescriptor tmp=TempDescriptor.tempFactory("arg",en.getType());
- temps[i]=tmp;
- NodePair np=flattenExpressionNode(en, tmp);
- last.addNext(np.getBegin());
- last=np.getEnd();
- }
- MethodDescriptor md=con.getConstructor();
- //Call to constructor
- FlatCall fc=new FlatCall(md, null, out_temp, temps);
- last.addNext(fc);
- return new NodePair(fn,fc);
- } else {
- FlatNode first=null;
- FlatNode last=null;
- TempDescriptor[] temps=new TempDescriptor[con.numArgs()];
- for (int i=0;i<con.numArgs();i++) {
- ExpressionNode en=con.getArg(i);
- TempDescriptor tmp=TempDescriptor.tempFactory("arg",en.getType());
- temps[i]=tmp;
- NodePair np=flattenExpressionNode(en, tmp);
- if (first==null)
- first=np.getBegin();
- else
- last.addNext(np.getBegin());
- last=np.getEnd();
-
- TempDescriptor tmp2=(i==0)?
- out_temp:
- TempDescriptor.tempFactory("arg",en.getType());
- }
- FlatNew fn=new FlatNew(td, out_temp, temps[0]);
- last.addNext(fn);
- if (temps.length>1) {
- NodePair np=generateNewArrayLoop(temps, td.dereference(), out_temp, 0);
- fn.addNext(np.getBegin());
- return new NodePair(first,np.getEnd());
- } else
- return new NodePair(first, fn);
- }
- }
-
- private NodePair generateNewArrayLoop(TempDescriptor[] temparray, TypeDescriptor td, TempDescriptor tmp, int i) {
- TempDescriptor index=TempDescriptor.tempFactory("index",new TypeDescriptor(TypeDescriptor.INT));
- TempDescriptor tmpone=TempDescriptor.tempFactory("index",new TypeDescriptor(TypeDescriptor.INT));
- FlatNop fnop=new FlatNop();//last node
-
- //index=0
- FlatLiteralNode fln=new FlatLiteralNode(index.getType(),new Integer(0),index);
- //tmpone=1
- FlatLiteralNode fln2=new FlatLiteralNode(tmpone.getType(),new Integer(1),tmpone);
-
- TempDescriptor tmpbool=TempDescriptor.tempFactory("comp",new TypeDescriptor(TypeDescriptor.BOOLEAN));
-
- FlatOpNode fcomp=new FlatOpNode(tmpbool,index,temparray[i],new Operation(Operation.LT));
- FlatCondBranch fcb=new FlatCondBranch(tmpbool);
- //is index<temp[i]
- TempDescriptor new_tmp=TempDescriptor.tempFactory("tmp",td);
- FlatNew fn=new FlatNew(td, new_tmp, temparray[i+1]);
- FlatSetElementNode fsen=new FlatSetElementNode(tmp,index,new_tmp);
- // index=index+1
- FlatOpNode fon=new FlatOpNode(index,index,tmpone,new Operation(Operation.ADD));
- //jump out
- fln.addNext(fln2);
- fln2.addNext(fcomp);
- fcomp.addNext(fcb);
- fcb.addTrueNext(fn);
- fcb.addFalseNext(fnop);
- fn.addNext(fsen);
- //Recursive call here
- if ((i+2)<temparray.length) {
- NodePair np2=generateNewArrayLoop(temparray, td.dereference(), new_tmp, i+1);
- fsen.addNext(np2.getBegin());
- np2.getEnd().addNext(fon);
- } else {
- fsen.addNext(fon);
- }
- fon.addNext(fcomp);
- return new NodePair(fln, fnop);
- }
-
- private NodePair flattenMethodInvokeNode(MethodInvokeNode min,TempDescriptor out_temp) {
- TempDescriptor[] temps=new TempDescriptor[min.numArgs()];
- FlatNode first=null;
- FlatNode last=null;
- TempDescriptor thisarg=null;
-
- if (min.getExpression()!=null) {
- thisarg=TempDescriptor.tempFactory("thisarg",min.getExpression().getType());
- NodePair np=flattenExpressionNode(min.getExpression(),thisarg);
- first=np.getBegin();
- last=np.getEnd();
- }
-
- //Build arguments
- for(int i=0;i<min.numArgs();i++) {
- ExpressionNode en=min.getArg(i);
- TempDescriptor td=TempDescriptor.tempFactory("arg",en.getType());
- temps[i]=td;
- NodePair np=flattenExpressionNode(en, td);
- if (first==null)
- first=np.getBegin();
- else
- last.addNext(np.getBegin());
- last=np.getEnd();
- }
-
- MethodDescriptor md=min.getMethod();
-
- //Call to constructor
-
- FlatCall fc;
- if(md.getReturnType()==null||md.getReturnType().isVoid())
- fc=new FlatCall(md, null, thisarg, temps);
- else
- fc=new FlatCall(md, out_temp, thisarg, temps);
- if (first==null) {
- first=fc;
- } else
- last.addNext(fc);
- return new NodePair(first,fc);
- }
-
- private NodePair flattenFieldAccessNode(FieldAccessNode fan,TempDescriptor out_temp) {
- TempDescriptor tmp=TempDescriptor.tempFactory("temp",fan.getExpression().getType());
- NodePair npe=flattenExpressionNode(fan.getExpression(),tmp);
- FlatFieldNode fn=new FlatFieldNode(fan.getField(),tmp,out_temp);
- npe.getEnd().addNext(fn);
- return new NodePair(npe.getBegin(),fn);
- }
-
- private NodePair flattenArrayAccessNode(ArrayAccessNode aan,TempDescriptor out_temp) {
- TempDescriptor tmp=TempDescriptor.tempFactory("temp",aan.getExpression().getType());
- TempDescriptor tmpindex=TempDescriptor.tempFactory("temp",aan.getIndex().getType());
- NodePair npe=flattenExpressionNode(aan.getExpression(),tmp);
- NodePair npi=flattenExpressionNode(aan.getIndex(),tmpindex);
- FlatElementNode fn=new FlatElementNode(tmp,tmpindex,out_temp);
- npe.getEnd().addNext(npi.getBegin());
- npi.getEnd().addNext(fn);
- return new NodePair(npe.getBegin(),fn);
- }
-
- private NodePair flattenAssignmentNode(AssignmentNode an,TempDescriptor out_temp) {
- // Two cases:
- // left side is variable
- // left side is field
-
- Operation base=an.getOperation().getBaseOp();
- TempDescriptor src_tmp=TempDescriptor.tempFactory("src",an.getSrc().getType());
- NodePair np_src=flattenExpressionNode(an.getSrc(),src_tmp);
- FlatNode last=np_src.getEnd();
- if (base!=null) {
- TempDescriptor src_tmp2=TempDescriptor.tempFactory("tmp", an.getDest().getType());
- NodePair np_dst_init=flattenExpressionNode(an.getDest(),src_tmp2);
- last.addNext(np_dst_init.getBegin());
- TempDescriptor dst_tmp=TempDescriptor.tempFactory("dst_tmp",an.getDest().getType());
- FlatOpNode fon=new FlatOpNode(dst_tmp, src_tmp,src_tmp2, base);
- np_dst_init.getEnd().addNext(fon);
- last=fon;
- src_tmp=dst_tmp;
- }
-
- if (an.getDest().kind()==Kind.FieldAccessNode) {
- FieldAccessNode fan=(FieldAccessNode)an.getDest();
- ExpressionNode en=fan.getExpression();
- TempDescriptor dst_tmp=TempDescriptor.tempFactory("dst",en.getType());
- NodePair np_baseexp=flattenExpressionNode(en, dst_tmp);
- last.addNext(np_baseexp.getBegin());
- FlatSetFieldNode fsfn=new FlatSetFieldNode(dst_tmp, fan.getField(), src_tmp);
- np_baseexp.getEnd().addNext(fsfn);
- return new NodePair(np_src.getBegin(), fsfn);
- } else if (an.getDest().kind()==Kind.ArrayAccessNode) {
- ArrayAccessNode aan=(ArrayAccessNode)an.getDest();
- ExpressionNode en=aan.getExpression();
- ExpressionNode enindex=aan.getIndex();
- TempDescriptor dst_tmp=TempDescriptor.tempFactory("dst",en.getType());
- TempDescriptor index_tmp=TempDescriptor.tempFactory("index",enindex.getType());
- NodePair np_baseexp=flattenExpressionNode(en, dst_tmp);
- NodePair np_indexexp=flattenExpressionNode(enindex, index_tmp);
- last.addNext(np_baseexp.getBegin());
- np_baseexp.getEnd().addNext(np_indexexp.getBegin());
- FlatSetElementNode fsen=new FlatSetElementNode(dst_tmp, index_tmp, src_tmp);
- np_indexexp.getEnd().addNext(fsen);
- return new NodePair(np_src.getBegin(), fsen);
- } else if (an.getDest().kind()==Kind.NameNode) {
- NameNode nn=(NameNode)an.getDest();
- if (nn.getExpression()!=null) {
- FieldAccessNode fan=(FieldAccessNode)nn.getExpression();
- ExpressionNode en=fan.getExpression();
- TempDescriptor dst_tmp=TempDescriptor.tempFactory("dst",en.getType());
- NodePair np_baseexp=flattenExpressionNode(en, dst_tmp);
- last.addNext(np_baseexp.getBegin());
- FlatSetFieldNode fsfn=new FlatSetFieldNode(dst_tmp, fan.getField(), src_tmp);
- np_baseexp.getEnd().addNext(fsfn);
- return new NodePair(np_src.getBegin(), fsfn);
- } else {
- if (nn.getField()!=null) {
- FlatSetFieldNode fsfn=new FlatSetFieldNode(getTempforVar(nn.getVar()), nn.getField(), src_tmp);
- last.addNext(fsfn);
- return new NodePair(np_src.getBegin(), fsfn);
- } else {
- FlatOpNode fon=new FlatOpNode(getTempforVar(nn.getVar()), src_tmp, null, new Operation(Operation.ASSIGN));
- last.addNext(fon);
- return new NodePair(np_src.getBegin(),fon);
- }
- }
- }
- throw new Error();
- }
-
- private NodePair flattenNameNode(NameNode nn,TempDescriptor out_temp) {
- if (nn.getExpression()!=null) {
- /* Hack - use subtree instead */
- return flattenExpressionNode(nn.getExpression(),out_temp);
- } else if (nn.getField()!=null) {
- TempDescriptor tmp=getTempforVar(nn.getVar());
- FlatFieldNode ffn=new FlatFieldNode(nn.getField(), tmp, out_temp);
- return new NodePair(ffn,ffn);
- } else {
- TempDescriptor tmp=getTempforVar(nn.getVar());
- FlatOpNode fon=new FlatOpNode(out_temp, tmp, null, new Operation(Operation.ASSIGN));
- return new NodePair(fon,fon);
- }
- }
-
- private NodePair flattenOpNode(OpNode on,TempDescriptor out_temp) {
- TempDescriptor temp_left=TempDescriptor.tempFactory("leftop",on.getLeft().getType());
- TempDescriptor temp_right=null;
-
- Operation op=on.getOp();
- if (op.getOp()==Operation.POSTINC||
- op.getOp()==Operation.POSTDEC||
- op.getOp()==Operation.PREINC||
- op.getOp()==Operation.PREDEC) {
- LiteralNode ln=new LiteralNode("int",new Integer(1));
- ln.setType(new TypeDescriptor(TypeDescriptor.INT));
- AssignmentNode an=new AssignmentNode(on.getLeft(),ln,
- new AssignOperation((op.getOp()==Operation.POSTINC||op.getOp()==Operation.PREINC)?AssignOperation.PLUSEQ:AssignOperation.MINUSEQ));
- if (op.getOp()==Operation.POSTINC||
- op.getOp()==Operation.POSTDEC) {
- NodePair left=flattenExpressionNode(on.getLeft(),out_temp);
- NodePair assign=flattenAssignmentNode(an,temp_left);
- left.getEnd().addNext(assign.getBegin());
- return new NodePair(left.getBegin(),assign.getEnd());
- } else {
- NodePair assign=flattenAssignmentNode(an,out_temp);
- return assign;
- }
- }
-
- NodePair left=flattenExpressionNode(on.getLeft(),temp_left);
- NodePair right;
- if (on.getRight()!=null) {
- temp_right=TempDescriptor.tempFactory("rightop",on.getRight().getType());
- right=flattenExpressionNode(on.getRight(),temp_right);
- } else {
- FlatNop nop=new FlatNop();
- right=new NodePair(nop,nop);
- }
-
- if (op.getOp()==Operation.LOGIC_OR) {
- /* Need to do shortcircuiting */
- FlatCondBranch fcb=new FlatCondBranch(temp_left);
- FlatOpNode fon1=new FlatOpNode(out_temp,temp_left,null,new Operation(Operation.ASSIGN));
- FlatOpNode fon2=new FlatOpNode(out_temp,temp_right,null,new Operation(Operation.ASSIGN));
- FlatNop fnop=new FlatNop();
- left.getEnd().addNext(fcb);
- fcb.addFalseNext(right.getBegin());
- right.getEnd().addNext(fon2);
- fon2.addNext(fnop);
- fcb.addTrueNext(fon1);
- fon1.addNext(fnop);
- return new NodePair(left.getBegin(), fnop);
- } else if (op.getOp()==Operation.LOGIC_AND) {
- /* Need to do shortcircuiting */
- FlatCondBranch fcb=new FlatCondBranch(temp_left);
- FlatOpNode fon1=new FlatOpNode(out_temp,temp_left,null,new Operation(Operation.ASSIGN));
- FlatOpNode fon2=new FlatOpNode(out_temp,temp_right,null,new Operation(Operation.ASSIGN));
- FlatNop fnop=new FlatNop();
- left.getEnd().addNext(fcb);
- fcb.addTrueNext(right.getBegin());
- right.getEnd().addNext(fon2);
- fon2.addNext(fnop);
- fcb.addFalseNext(fon1);
- fon1.addNext(fnop);
- return new NodePair(left.getBegin(), fnop);
- }
-
- FlatOpNode fon=new FlatOpNode(out_temp,temp_left,temp_right,op);
- left.getEnd().addNext(right.getBegin());
- right.getEnd().addNext(fon);
- return new NodePair(left.getBegin(),fon);
- }
-
- private NodePair flattenExpressionNode(ExpressionNode en, TempDescriptor out_temp) {
- switch(en.kind()) {
- case Kind.AssignmentNode:
- return flattenAssignmentNode((AssignmentNode)en,out_temp);
- case Kind.CastNode:
- return flattenCastNode((CastNode)en,out_temp);
- case Kind.CreateObjectNode:
- return flattenCreateObjectNode((CreateObjectNode)en,out_temp);
- case Kind.FieldAccessNode:
- return flattenFieldAccessNode((FieldAccessNode)en,out_temp);
- case Kind.ArrayAccessNode:
- return flattenArrayAccessNode((ArrayAccessNode)en,out_temp);
- case Kind.LiteralNode:
- return flattenLiteralNode((LiteralNode)en,out_temp);
- case Kind.MethodInvokeNode:
- return flattenMethodInvokeNode((MethodInvokeNode)en,out_temp);
- case Kind.NameNode:
- return flattenNameNode((NameNode)en,out_temp);
- case Kind.OpNode:
- return flattenOpNode((OpNode)en,out_temp);
- }
- throw new Error();
- }
-
- private NodePair flattenDeclarationNode(DeclarationNode dn) {
- VarDescriptor vd=dn.getVarDescriptor();
- TempDescriptor td=getTempforVar(vd);
- if (dn.getExpression()!=null)
- return flattenExpressionNode(dn.getExpression(),td);
- else {
- FlatNop fn=new FlatNop();
- return new NodePair(fn,fn);
- }
- }
-
- private TempDescriptor getTempforVar(VarDescriptor vd) {
- if (temptovar.containsKey(vd))
- return (TempDescriptor)temptovar.get(vd);
- else {
- TempDescriptor td=TempDescriptor.tempFactory(vd.getName(),vd.getType());
- temptovar.put(vd,td);
- return td;
- }
- }
-
- private NodePair flattenIfStatementNode(IfStatementNode isn) {
- TempDescriptor cond_temp=TempDescriptor.tempFactory("condition",new TypeDescriptor(TypeDescriptor.BOOLEAN));
- NodePair cond=flattenExpressionNode(isn.getCondition(),cond_temp);
- FlatCondBranch fcb=new FlatCondBranch(cond_temp);
- NodePair true_np=flattenBlockNode(isn.getTrueBlock());
- NodePair false_np;
- FlatNop nopend=new FlatNop();
-
- if (isn.getFalseBlock()!=null)
- false_np=flattenBlockNode(isn.getFalseBlock());
- else {
- FlatNop nop=new FlatNop();
- false_np=new NodePair(nop,nop);
- }
-
- cond.getEnd().addNext(fcb);
- fcb.addTrueNext(true_np.getBegin());
- fcb.addFalseNext(false_np.getBegin());
- true_np.getEnd().addNext(nopend);
- false_np.getEnd().addNext(nopend);
- return new NodePair(cond.getBegin(), nopend);
- }
-
- private NodePair flattenLoopNode(LoopNode ln) {
- if (ln.getType()==LoopNode.FORLOOP) {
- NodePair initializer=flattenBlockNode(ln.getInitializer());
- TempDescriptor cond_temp=TempDescriptor.tempFactory("condition", new TypeDescriptor(TypeDescriptor.BOOLEAN));
- NodePair condition=flattenExpressionNode(ln.getCondition(),cond_temp);
- NodePair update=flattenBlockNode(ln.getUpdate());
- NodePair body=flattenBlockNode(ln.getBody());
- FlatNode begin=initializer.getBegin();
- FlatCondBranch fcb=new FlatCondBranch(cond_temp);
- FlatNop nopend=new FlatNop();
-
- initializer.getEnd().addNext(condition.getBegin());
- body.getEnd().addNext(update.getBegin());
- update.getEnd().addNext(condition.getBegin());
- condition.getEnd().addNext(fcb);
- fcb.addFalseNext(nopend);
- fcb.addTrueNext(body.getBegin());
- return new NodePair(begin,nopend);
- } else if (ln.getType()==LoopNode.WHILELOOP) {
- TempDescriptor cond_temp=TempDescriptor.tempFactory("condition", new TypeDescriptor(TypeDescriptor.BOOLEAN));
- NodePair condition=flattenExpressionNode(ln.getCondition(),cond_temp);
- NodePair body=flattenBlockNode(ln.getBody());
- FlatNode begin=condition.getBegin();
- FlatCondBranch fcb=new FlatCondBranch(cond_temp);
- FlatNop nopend=new FlatNop();
-
- body.getEnd().addNext(condition.getBegin());
- condition.getEnd().addNext(fcb);
- fcb.addFalseNext(nopend);
- fcb.addTrueNext(body.getBegin());
- return new NodePair(begin,nopend);
- } else if (ln.getType()==LoopNode.DOWHILELOOP) {
- TempDescriptor cond_temp=TempDescriptor.tempFactory("condition", new TypeDescriptor(TypeDescriptor.BOOLEAN));
- NodePair condition=flattenExpressionNode(ln.getCondition(),cond_temp);
- NodePair body=flattenBlockNode(ln.getBody());
- FlatNode begin=body.getBegin();
- FlatCondBranch fcb=new FlatCondBranch(cond_temp);
- FlatNop nopend=new FlatNop();
-
- body.getEnd().addNext(condition.getBegin());
- condition.getEnd().addNext(fcb);
- fcb.addFalseNext(nopend);
- fcb.addTrueNext(body.getBegin());
- return new NodePair(begin,nopend);
- } else throw new Error();
- }
-
- private NodePair flattenReturnNode(ReturnNode rntree) {
- TempDescriptor retval=null;
- NodePair cond=null;
- if (rntree.getReturnExpression()!=null) {
- retval=TempDescriptor.tempFactory("ret_value", rntree.getReturnExpression().getType());
- cond=flattenExpressionNode(rntree.getReturnExpression(),retval);
- }
-
- FlatReturnNode rnflat=new FlatReturnNode(retval);
-
- if (cond!=null) {
- cond.getEnd().addNext(rnflat);
- return new NodePair(cond.getBegin(),rnflat);
- } else
- return new NodePair(rnflat,rnflat);
- }
-
- private NodePair flattenTaskExitNode(TaskExitNode ten) {
- FlatFlagActionNode ffan=new FlatFlagActionNode(true);
- updateFlagActionNode(ffan, ten.getFlagEffects());
- return new NodePair(ffan, ffan);
- }
-
- private NodePair flattenSubBlockNode(SubBlockNode sbn) {
- return flattenBlockNode(sbn.getBlockNode());
- }
-
- private NodePair flattenBlockStatementNode(BlockStatementNode bsn) {
- switch(bsn.kind()) {
- case Kind.BlockExpressionNode:
- return flattenBlockExpressionNode((BlockExpressionNode)bsn);
-
- case Kind.DeclarationNode:
- return flattenDeclarationNode((DeclarationNode)bsn);
-
- case Kind.IfStatementNode:
- return flattenIfStatementNode((IfStatementNode)bsn);
-
- case Kind.LoopNode:
- return flattenLoopNode((LoopNode)bsn);
-
- case Kind.ReturnNode:
- return flattenReturnNode((IR.Tree.ReturnNode)bsn);
-
- case Kind.TaskExitNode:
- return flattenTaskExitNode((IR.Tree.TaskExitNode)bsn);
-
- case Kind.SubBlockNode:
- return flattenSubBlockNode((SubBlockNode)bsn);
-
- }
- throw new Error();
- }
-}
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