@Override
public DfaInstructionState[] visitPush(
PushInstruction instruction, DataFlowRunner runner, DfaMemoryState memState) {
if (myContext == instruction.getPlace()) {
final Map<DfaVariableValue, DfaVariableState> map =
((ValuableDataFlowRunner.MyDfaMemoryState) memState).getVariableStates();
for (Map.Entry<DfaVariableValue, DfaVariableState> entry : map.entrySet()) {
ValuableDataFlowRunner.ValuableDfaVariableState state =
(ValuableDataFlowRunner.ValuableDfaVariableState) entry.getValue();
DfaVariableValue variableValue = entry.getKey();
final PsiExpression psiExpression = state.myExpression;
if (psiExpression != null && variableValue.getQualifier() == null) {
myValues.put(variableValue.getPsiVariable(), psiExpression);
}
}
DfaValue value = instruction.getValue();
if (value instanceof DfaVariableValue
&& ((DfaVariableValue) value).getQualifier() == null) {
if (memState.isNotNull((DfaVariableValue) value)) {
myNotNulls.add(((DfaVariableValue) value).getPsiVariable());
}
if (memState.isNull(value)) {
myNulls.add(((DfaVariableValue) value).getPsiVariable());
}
}
}
return super.visitPush(instruction, runner, memState);
}
@Nullable
private DfaInstructionState[] handleRelationBinop(
BinopInstruction instruction,
DataFlowRunner runner,
DfaMemoryState memState,
DfaValue dfaRight,
DfaValue dfaLeft) {
DfaValueFactory factory = runner.getFactory();
final Instruction next = runner.getInstruction(instruction.getIndex() + 1);
DfaRelationValue dfaRelation =
factory
.getRelationFactory()
.createRelation(dfaLeft, dfaRight, instruction.getOperationSign(), false);
if (dfaRelation == null) {
return null;
}
myCanBeNullInInstanceof.add(instruction);
ArrayList<DfaInstructionState> states = new ArrayList<DfaInstructionState>();
final DfaMemoryState trueCopy = memState.createCopy();
if (trueCopy.applyCondition(dfaRelation)) {
trueCopy.push(factory.getConstFactory().getTrue());
instruction.setTrueReachable();
states.add(new DfaInstructionState(next, trueCopy));
}
//noinspection UnnecessaryLocalVariable
DfaMemoryState falseCopy = memState;
if (falseCopy.applyCondition(dfaRelation.createNegated())) {
falseCopy.push(factory.getConstFactory().getFalse());
instruction.setFalseReachable();
states.add(new DfaInstructionState(next, falseCopy));
if (instruction instanceof InstanceofInstruction && !falseCopy.isNull(dfaLeft)) {
myUsefulInstanceofs.add((InstanceofInstruction) instruction);
}
}
return states.toArray(new DfaInstructionState[states.size()]);
}