package MCC.IR;
+import java.util.*;
class ConcreteInterferes {
static public boolean interferes(MultUpdateNode mun, Rule r, boolean satisfy) {
+ if (!initialinterferes(mun,r,satisfy)) /* Can't falsify a rule adding something to a set on an initial addition*/
+ return false;
for(int i=0;i<mun.numUpdates();i++) {
UpdateNode un=mun.getUpdate(i);
for (int j=0;j<un.numUpdates();j++) {
if (satisfy)
drule=r.getDNFNegGuardExpr();
+
if (!update.isAbstract()) {
Descriptor updated_des=update.getDescriptor();
assert updated_des!=null;
+ /* Update is local to this rule, and the effect is intentional */
+ /* If we're adding something, a side effect could be to falsify some other binding
+ If we're removing something, there is no similar side effect */
+ if ((un.getRule()==r)&&
+ (((mun.op==MultUpdateNode.ADD)&&satisfy)||(mun.op==MultUpdateNode.REMOVE))&&
+ (r.numQuantifiers()==1)&&
+ (r.getQuantifier(0) instanceof SetQuantifier)&&
+ update.isField()&&
+ (((DotExpr)update.getLeftExpr()).getExpr() instanceof VarExpr)&&
+ ((SetQuantifier)r.getQuantifier(0)).getVar()==((VarExpr)((DotExpr)update.getLeftExpr()).getExpr()).getVar())
+ continue;
+ if ((un.getRule()==r)&&
+ (((mun.op==MultUpdateNode.ADD)&&satisfy)||(mun.op==MultUpdateNode.REMOVE))&&
+ (r.numQuantifiers()==0))
+ continue;
+
+
if (r.getInclusion().usesDescriptor(updated_des))
return true; /* Interferes with inclusion condition */
for(int k=0;k<drule.size();k++) {
RuleConjunction rconj=drule.get(k);
for(int l=0;l<rconj.size();l++) {
+
+
DNFExpr dexpr=rconj.get(l);
/* See if update interferes w/ dexpr */
-
- if (!dexpr.getExpr().usesDescriptor(updated_des))
- continue; /* No use of the descriptor */
-
- return true;
+ if (interferes(un,update, r,dexpr))
+ return true;
}
}
}
}
return false;
}
+
+ static private boolean initialinterferes(MultUpdateNode mun, Rule r, boolean satisfy) {
+ AbstractRepair ar=mun.getRepair();
+ if (satisfy)
+ return true;
+ if (ar==null)
+ return true;
+ if (ar.getType()!=AbstractRepair.ADDTOSET)
+ return true;
+ // if (mun.op!=MultUpdateNode.ADD) (Redundant)
+ // return true;
+ if (!r.getInclusion().getTargetDescriptors().contains(ar.getDescriptor()))
+ return true;
+ boolean negated=ar.getPredicate().isNegated();
+ Predicate p=ar.getPredicate().getPredicate();
+ if (!(p instanceof ExprPredicate))
+ return true;
+ ExprPredicate ep=(ExprPredicate)p;
+ if (ep.getType()!=ExprPredicate.SIZE)
+ return true;
+ if ((ep.getOp()==Opcode.EQ)&&(ep.leftsize()==1)&&!negated)
+ return false;
+ if ((ep.getOp()==Opcode.NE)&&(ep.leftsize()==1)&&negated)
+ return false;
+
+ if ((ep.getOp()==Opcode.NE)&&(ep.leftsize()==0)&&!negated)
+ return false;
+ if ((ep.getOp()==Opcode.EQ)&&(ep.leftsize()==0)&&negated)
+ return false;
+
+
+
+ if ((ep.getOp()==Opcode.GT)&&(ep.leftsize()==0)&&!negated)
+ return false;
+ if ((ep.getOp()==Opcode.LE)&&(ep.leftsize()==0)&&negated)
+ return false;
+
+ if ((ep.getOp()==Opcode.GE)&&(ep.leftsize()==1)&&!negated)
+ return false;
+ if ((ep.getOp()==Opcode.LT)&&(ep.leftsize()==1)&&negated)
+ return false;
+
+ return true;
+
+
+ }
+
+ static private boolean interferes(UpdateNode un,Updates update, Rule r,DNFExpr dexpr) {
+ Descriptor descriptor=update.getDescriptor();
+ if (!dexpr.getExpr().usesDescriptor(descriptor))
+ return false;
+
+ /* We need to pair the variables */
+ if (update.isExpr()) {
+ Set vars=update.getRightExpr().freeVars();
+ Opcode op1=update.getOpcode();
+ Expr lexpr1=update.getLeftExpr();
+ Expr rexpr1=update.getRightExpr();
+ boolean good=true;
+ for(Iterator it=vars.iterator();it.hasNext();) {
+ VarDescriptor vd=(VarDescriptor) it.next();
+ if (un.getBinding(vd)!=null) {
+ /* VarDescriptor isn't a global */
+ if (update.getVar()!=vd) {
+ good=false;
+ break;
+ }
+ }
+ }
+ if (good&&(dexpr.getExpr() instanceof OpExpr)) {
+ OpExpr expr=(OpExpr)dexpr.getExpr();
+ Expr lexpr2=expr.getLeftExpr();
+ Expr rexpr2=expr.getRightExpr();
+ Opcode op2=expr.getOpcode();
+ if (dexpr.getNegation()) {
+ /* remove negation through opcode translation */
+ if (op2==Opcode.GT)
+ op2=Opcode.LE;
+ else if (op2==Opcode.GE)
+ op2=Opcode.LT;
+ else if (op2==Opcode.EQ)
+ op2=Opcode.NE;
+ else if (op2==Opcode.NE)
+ op2=Opcode.EQ;
+ else if (op2==Opcode.LT)
+ op2=Opcode.GE;
+ else if (op2==Opcode.LE)
+ op2=Opcode.GT;
+ }
+ good=true;
+ vars=rexpr2.freeVars();
+ VarDescriptor leftdescriptor=null;
+ if (lexpr2 instanceof VarExpr)
+ leftdescriptor=((VarExpr)lexpr2).getVar();
+ else if (lexpr2 instanceof DotExpr) {
+ Expr e=lexpr2;
+ for(;e instanceof DotExpr;e=((DotExpr)e).getExpr()) ;
+ leftdescriptor=((VarExpr)e).getVar();
+ } else throw new Error("Bad Expr");
+
+ for(Iterator it=vars.iterator();it.hasNext();) {
+ VarDescriptor vd=(VarDescriptor) it.next();
+ if (un.getBinding(vd)!=null) {
+ /* VarDescriptor isn't a global */
+ if (leftdescriptor!=vd) {
+ good=false;
+ break;
+ }
+ }
+ }
+ if (good) {
+ HashMap remap=new HashMap();
+ remap.put(update.getVar(),leftdescriptor);
+ if ((op1==op2)&&
+ lexpr1.equals(remap,lexpr2)&&
+ rexpr1.equals(remap,rexpr2))
+ return false;
+ }
+ }
+ }
+ return true;
+ }
}
projects / repair.git / blobdiff