@begin: scope:[]  from
  [0] phi()
  to:@1
@1: scope:[]  from @begin
  [1] phi()
  [2] call main 
  to:@end
@end: scope:[]  from @1
  [3] phi()

(void()) main()
main: scope:[main]  from @1
  [4] phi()
  [5] call ifunc 
  [6] (dword) ifunc::return#2 ← (dword) ifunc::return#0
  to:main::@1
main::@1: scope:[main]  from main
  [7] (dword~) main::$0 ← (dword) ifunc::return#2
  [8] *((const dword*) SCREEN) ← (dword~) main::$0
  to:main::@return
main::@return: scope:[main]  from main::@1
  [9] return 
  to:@return

(dword()) ifunc((dword) ifunc::a)
ifunc: scope:[ifunc]  from main
  [10] phi()
  to:ifunc::@1
ifunc::@1: scope:[ifunc]  from ifunc ifunc::@2
  [11] (dword) ifunc::delta#2 ← phi( ifunc/(dword) 3 ifunc::@2/(dword) ifunc::delta#1 )
  [11] (dword) ifunc::x#3 ← phi( ifunc/(dword) 1 ifunc::@2/(dword) ifunc::x#1 )
  [11] (dword) ifunc::xsqr#2 ← phi( ifunc/(dword) 1 ifunc::@2/(dword) ifunc::xsqr#1 )
  [12] if((dword) ifunc::xsqr#2<(const dword) ifunc::a#0+(byte) 1) goto ifunc::@2
  to:ifunc::@3
ifunc::@3: scope:[ifunc]  from ifunc::@1
  [13] (dword) ifunc::return#0 ← -- (dword) ifunc::x#3
  to:ifunc::@return
ifunc::@return: scope:[ifunc]  from ifunc::@3
  [14] return 
  to:@return
ifunc::@2: scope:[ifunc]  from ifunc::@1
  [15] (dword) ifunc::x#1 ← ++ (dword) ifunc::x#3
  [16] (dword) ifunc::xsqr#1 ← (dword) ifunc::xsqr#2 + (dword) ifunc::delta#2
  [17] (dword) ifunc::delta#1 ← (dword) ifunc::delta#2 + (byte) 2
  to:ifunc::@1
