AST Dump for function
 LIST {
  FOR
  INIT:
   ASSIGNMENT
    stab_var name=a def @<stdin>:4
    BINARY OP +
     stab_var name=b def @<stdin>:5
     CONSTANT: (type=int)2
  COND:
   COMPARISON OP <
    stab_var name=i def @<stdin>:1
    stab_var name=a def @<stdin>:4
  BODY:
   LIST {
    ASSIGNMENT
     DEREF
      BINARY OP +
       stab_var name=y def @<stdin>:1
       stab_var name=i def @<stdin>:1
     TERNARY OP, IF:
       DEREF
       BINARY OP +
        stab_var name=y def @<stdin>:1
        BINARY OP -
         stab_var name=i def @<stdin>:1
         CONSTANT: (type=int)1
     THEN:
      stab_var name=a def @<stdin>:4
     ELSE:
      BINARY OP +
       stab_var name=b def @<stdin>:5
       stab_var name=i def @<stdin>:1
   }
  INCR:
   UNARY OP POSTINC
    stab_var name=i def @<stdin>:1
 }