private void checkForUseOfParams()

in jar-infer/jar-infer-lib/src/main/java/com/uber/nullaway/jarinfer/DefinitelyDerefedParams.java [188:227]
37 lines of code
14 McCabe index (conditional complexity)

  private void checkForUseOfParams(
      Set<Integer> derefedParamList, int numParam, int firstParamIndex, ISSABasicBlock node) {
    if (!node.isEntryBlock() && !node.isExitBlock()) { // entry and exit are dummy basic blocks
      LOG(DEBUG, "DEBUG", ">> bb: " + node.getNumber());
      // Iterate over all instructions in BB
      for (int i = node.getFirstInstructionIndex(); i <= node.getLastInstructionIndex(); i++) {
        SSAInstruction instr = ir.getInstructions()[i];
        if (instr == null) { // Some instructions are null (padding NoOps)
          continue;
        }
        LOG(DEBUG, "DEBUG", "\tinst: " + instr.toString());
        int derefValueNumber = -1;
        if (instr instanceof SSAGetInstruction ssaGetInstruction && !ssaGetInstruction.isStatic()) {
          derefValueNumber = ssaGetInstruction.getRef();
        } else if (instr instanceof SSAPutInstruction ssaPutInstruction
            && !ssaPutInstruction.isStatic()) {
          derefValueNumber = ssaPutInstruction.getRef();
        } else if (instr instanceof SSAAbstractInvokeInstruction callInst) {
          String sign = callInst.getDeclaredTarget().getSignature();
          if (callInst.isStatic()) {
            // All supported Null testing APIs are static methods
            if (NULL_TEST_APIS.containsKey(sign)) {
              derefValueNumber = callInst.getUse(NULL_TEST_APIS.get(sign));
            }
          } else {
            Preconditions.checkArgument(
                !NULL_TEST_APIS.containsKey(sign),
                "Add support for non-static NULL_TEST_APIS : %s",
                sign);
            derefValueNumber = callInst.getReceiver();
          }
        }
        if (derefValueNumber >= firstParamIndex && derefValueNumber <= numParam) {
          LOG(DEBUG, "DEBUG", "\t\tderefed param : " + derefValueNumber);
          // Translate from WALA 1-indexed params, to 0-indexed
          derefedParamList.add(derefValueNumber - 1);
        }
      }
    }
  }