Pseudocode: Introduce pseudo-value analysis

compiler/testData/cfg-variables/lexicalScopes/doWhileScope.instructions

@@ -11,24 +11,24 @@ L0:
   1 <START>                                                      INIT: in: {} out: {}
   2 mark({ "before" do { var a = 2 } while (a > 0) "after" })
     mark("before")
-    r("before")                                                                                  USE: in: {} out: {}
+    r("before") -> <v0>                                                                          USE: in: {} out: {}
   3 mark(do { var a = 2 } while (a > 0))
 L2 [loop entry point]:
 L4 [body entry point]:
     mark({ var a = 2 })                                          INIT: in: {a=ID} out: {a=ID}
     v(var a = 2)
-    r(2)
-    w(a)
+    r(2) -> <v1>
+    w(a|<v1>)
 L5 [condition entry point]:
     mark(a > 0)
-    r(a)
-    r(0)
-    call(>, compareTo)
-    jt(L2 [loop entry point])                                                                    USE: in: {a=READ} out: {a=READ}
+    r(a) -> <v2>
+    r(0) -> <v3>
+    call(>, compareTo|<v2>, <v3>) -> <v4>
+    jt(L2 [loop entry point]|<v4>)                                                               USE: in: {a=READ} out: {a=READ}
 L3 [loop exit point]:
     read (Unit)
   2 mark("after")                                                INIT: in: {} out: {}
-    r("after")
+    r("after") -> <v5>
 L1:
   1 <END>
 error: