
void main()
main: scope:[main]  from
  [0] main::n#0 = *mmap
  to:main::@1
main::@1: scope:[main]  from main main::@2
  [1] main::n#2 = phi( main/main::n#0, main::@2/main::n#5 )
  [2] main::n#1 = -- main::n#2
  [3] if(0!=main::n#2) goto main::@2
  to:main::@return
main::@return: scope:[main]  from main::@1
  [4] return 
  to:@return
main::@2: scope:[main]  from main::@1
  [5] *((char *) 1024) = main::n#1
  [6] main::n#5 = main::n#1
  to:main::@1
