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