@begin: scope:[]  from
  [0] phi()
  to:@2
@2: scope:[]  from @begin
  [1] phi()
  [2] call main 
  to:@end
@end: scope:[]  from @2
  [3] phi()
main: scope:[main]  from @2
  [4] phi()
  to:main::toUpper1
main::toUpper1: scope:[main]  from main
  [5] phi()
  to:main::@1
main::@1: scope:[main]  from main::toUpper1
  [6] *((const byte*) screen#0) ← (const byte) main::toUpper1_res#1
  to:main::toUpper2
main::toUpper2: scope:[main]  from main::@1
  [7] phi()
  to:main::@2
main::@2: scope:[main]  from main::toUpper2
  [8] *((const byte*) screen#0+(byte/signed byte/word/signed word/dword/signed dword) 1) ← (const byte) main::toUpper2_ch#0
  to:main::@return
main::@return: scope:[main]  from main::@2
  [9] return 
  to:@return
