gcc/testsuite/gcc.c-torture/compile/20030405-1.c

   1 /* When compiled with -pedantic, this program will cause an ICE when the
   2    constant propagator tries to set the value of *str to UNDEFINED.
   3
   4    This happens because *str is erroneously considered as a store alias.
   5    The aliasing code is then making *str an alias leader for its alias set
   6    and when the PHI node at the end of the while() is visited the first
   7    time, CCP will try to assign it a value of UNDEFINED, but the default
   8    value for *str is a constant.  */
   9 typedef unsigned int size_t;
  10 size_t strlength (const char * const);
  11 char foo();
  12
  13 static const char * const str = "mingo";
  14
  15 bar()
  16 {
  17   size_t c;
  18   char *x;
  19
  20   c = strlength (str);
  21   while (c < 10)
  22     {
  23       if (c > 5)
  24         *x = foo ();
  25       if (*x < 'a')
  26         break;
  27     }
  28
  29   return *x == '3';
  30 }