(defun make-another-test-thing ()
  (make-instance 'llvm-if
                 :type "i32"
                 :test (make-instance 'llvm-arithmetic
                                      :name "cmp eq"
                                      :children (list
                                                 (make-instance 'llvm-constant
                                                                :value 42
                                                                :type "i32")
                                                 (make-instance 'llvm-constant
                                                                :value 43
                                                                :type "i32")))
                 :then (make-instance 'llvm-constant :value 0 :type "i32")
                 :else (make-instance 'llvm-constant :value 1337 :type "i32")))

CL-USER> (make-another-test-thing)

%20 = cmp eq i32 42, 43
br i1 %20, label %thenlabel15, label %elselabel16
thenlabel15:
%then17 = 0
elselabel16:
%else18 = 1337
%return19 = phi i32 [ %then17, %thenlabel15 ], [ %else18, %elselabel16 ]