code: private void normalizeBlocks(Node n) {
      if (NodeUtil.isControlStructure(n)
          && !n.isLabel()
          && !n.isSwitch()) {
        for (Node c = n.getFirstChild(); c != null; c = c.getNext()) {
          if (NodeUtil.isControlStructureCodeBlock(n, c) && !c.isBlock()) {
            Node newBlock = IR.block().srcref(n);
            n.replaceChild(c, newBlock);
            newBlock.setIsAddedBlock(true);
            if (!c.isEmpty()) {
              newBlock.addChildrenToFront(c);
            }
            c = newBlock;
            reportChange();
          }
        }
      }
    }
docs: Add blocks to IF, WHILE, DO, etc.