old-autovect-branch/gcc/testsuite/gcc.c-torture/execute/builtins/lib/strstr.c

   1 extern void abort (void);
   2 extern int inside_main;
   3
   4 char *
   5 strstr(const char *s1, const char *s2)
   6 {
   7   const char *p, *q;
   8
   9 #ifdef __OPTIMIZE__
  10   if (inside_main)
  11     abort ();
  12 #endif
  13
  14   /* deliberately dumb algorithm */
  15   for (; *s1; s1++)
  16     {
  17       p = s1, q = s2;
  18       while (*q && *p)
  19         {
  20           if (*q != *p)
  21             break;
  22           p++, q++;
  23         }
  24       if (*q == 0)
  25         return (char *)s1;
  26     }
  27   return 0;
  28 }