gcc/testsuite/gcc.c-torture/execute/builtins/strstr-asm-lib.c

   1 extern void abort (void);
   2 typedef __SIZE_TYPE__ size_t;
   3 extern size_t strlen(const char *);
   4 extern char *strchr(const char *, int);
   5 extern int strcmp(const char *, const char *);
   6 extern int strncmp(const char *, const char *, size_t);
   7 extern int inside_main;
   8 extern const char *p;
   9
  10 __attribute__ ((used))
  11 char *
  12 my_strstr (const char *s1, const char *s2)
  13 {
  14   const size_t len = strlen (s2);
  15
  16 #ifdef __OPTIMIZE__
  17   /* If optimizing, we should be called only in the strstr (foo + 2, p)
  18      case.  All other cases should be optimized.  */
  19   if (inside_main)
  20     if (s2 != p || strcmp (s1, "hello world" + 2) != 0)
  21       abort ();
  22 #endif
  23   if (len == 0)
  24     return (char *) s1;
  25   for (s1 = strchr (s1, *s2); s1; s1 = strchr (s1 + 1, *s2))
  26     if (strncmp (s1, s2, len) == 0)
  27       return (char *) s1;
  28   return (char *) 0;
  29 }
  30
  31 char *
  32 strstr (const char *s1, const char *s2)
  33 {
  34   if (inside_main)
  35     abort ();
  36
  37   return my_strstr (s1, s2);
  38 }