@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()
  to:main::@1
main::@1: scope:[main]  from main main::@3
  [5] (word*) main::screen#1 ← phi( main/(word*) 1024 main::@3/(word*) main::screen#2 )
  [5] (byte) main::y#2 ← phi( main/(byte) 0 main::@3/(byte) main::y#1 )
  [6] (byte) mul8u::a#1 ← (byte) main::y#2
  [7] call mul8u 
  [8] (word) mul8u::return#2 ← (word) mul8u::res#2
  to:main::@2
main::@2: scope:[main]  from main::@1
  [9] (word) main::z1#0 ← (word) mul8u::return#2
  [10] *((word*) main::screen#1) ← (word) main::z1#0
  [11] (byte) mul8u::a#2 ← (byte) main::y#2
  [12] call mul8u 
  [13] (word) mul8u::return#3 ← (word) mul8u::res#2
  to:main::@3
main::@3: scope:[main]  from main::@2
  [14] (word) main::z2#0 ← (word) mul8u::return#3
  [15] *((word*) main::screen#1 + (const byte) SIZEOF_WORD) ← (word) main::z2#0
  [16] (word*) main::screen#2 ← (word*) main::screen#1 + (const byte) SIZEOF_WORD+(const byte) SIZEOF_WORD
  [17] (byte) main::y#1 ← ++ (byte) main::y#2
  [18] if((byte) main::y#1!=(byte) 6) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@3
  [19] return 
  to:@return

(word()) mul8u((byte) mul8u::a , (byte) mul8u::b)
mul8u: scope:[mul8u]  from main::@1 main::@2
  [20] (byte) mul8u::a#6 ← phi( main::@1/(byte) mul8u::a#1 main::@2/(byte) mul8u::a#2 )
  to:mul8u::@1
mul8u::@1: scope:[mul8u]  from mul8u mul8u::@3
  [21] (word) mul8u::mb#2 ← phi( mul8u/(word) $28 mul8u::@3/(word) mul8u::mb#1 )
  [21] (word) mul8u::res#2 ← phi( mul8u/(word) 0 mul8u::@3/(word) mul8u::res#6 )
  [21] (byte) mul8u::a#3 ← phi( mul8u/(byte) mul8u::a#6 mul8u::@3/(byte) mul8u::a#0 )
  [22] if((byte) mul8u::a#3!=(byte) 0) goto mul8u::@2
  to:mul8u::@return
mul8u::@return: scope:[mul8u]  from mul8u::@1
  [23] return 
  to:@return
mul8u::@2: scope:[mul8u]  from mul8u::@1
  [24] (byte~) mul8u::$1 ← (byte) mul8u::a#3 & (byte) 1
  [25] if((byte~) mul8u::$1==(byte) 0) goto mul8u::@3
  to:mul8u::@4
mul8u::@4: scope:[mul8u]  from mul8u::@2
  [26] (word) mul8u::res#1 ← (word) mul8u::res#2 + (word) mul8u::mb#2
  to:mul8u::@3
mul8u::@3: scope:[mul8u]  from mul8u::@2 mul8u::@4
  [27] (word) mul8u::res#6 ← phi( mul8u::@2/(word) mul8u::res#2 mul8u::@4/(word) mul8u::res#1 )
  [28] (byte) mul8u::a#0 ← (byte) mul8u::a#3 >> (byte) 1
  [29] (word) mul8u::mb#1 ← (word) mul8u::mb#2 << (byte) 1
  to:mul8u::@1
