public List<Variable> getVariables() {
// only the params are relevant for globals replacement
List<Variable> retMe = new LinkedList<>();
for (TacActualParameter param : this.paramList) {
AbstractTacPlace paramPlace = param.getPlace();
if (paramPlace instanceof Variable) {
retMe.add((Variable) paramPlace);
} else {
retMe.add(null);
}
}
return retMe;
}
// returns a list consisting of two-element-lists consisting of
// (actual cbr-param, formal cbr-param) (Variable objects)
public List<List<Variable>> getCbrParams() {
if (this.cbrParamList != null) {
return this.cbrParamList;
}
List<TacActualParameter> actualParams = this.paramList;
List<TacFormalParameter> formalParams = this.getCallee().getParams();
this.cbrParamList = new LinkedList<>();
Iterator<TacActualParameter> actualIter = actualParams.iterator();
Iterator<TacFormalParameter> formalIter = formalParams.iterator();
while (actualIter.hasNext()) {
TacActualParameter actualParam = actualIter.next();
TacFormalParameter formalParam = formalIter.next();
// if this is a cbr-param...
if (actualParam.isReference() || formalParam.isReference()) {
// the actual part of a cbr-param must always be a variable
if (!(actualParam.getPlace() instanceof Variable)) {
throw new RuntimeException("Error in the PHP file!");
}
Variable actualVar = (Variable) actualParam.getPlace();
Variable formalVar = formalParam.getVariable();
// check for unsupported features;
// none of the variables must be an array or etc.;
// in such a case, ignore it and continue with the next cbr-param
boolean supported =
AliasAnalysis.isSupported(formalVar, actualVar, true, this.getOriginalLineNumber());
if (!supported) {
continue;
}
List<Variable> pairList = new LinkedList<>();
pairList.add(actualVar);
pairList.add(formalVar);
cbrParamList.add(pairList);
}
}
return cbrParamList;
}
public void replaceVariable(int index, Variable replacement) {
TacActualParameter param = this.paramList.get(index);
param.setPlace(replacement);
}