gcc/testsuite/gcc.c-torture/execute/builtins/string-asm-1.c

   1 /* Copyright (C) 2000, 2003  Free Software Foundation.
   2
   3    Ensure all expected transformations of builtin strstr occur and
   4    perform correctly in presence of redirect.  */
   5
   6 #define ASMNAME(cname)  ASMNAME2 (__USER_LABEL_PREFIX__, cname)
   7 #define ASMNAME2(prefix, cname) STRING (prefix) cname
   8 #define STRING(x)    #x
   9
  10 typedef __SIZE_TYPE__ size_t;
  11 extern void abort (void);
  12 extern char *strstr (const char *, const char *)
  13   __asm (ASMNAME ("my_strstr"));
  14
  15 const char *p = "rld", *q = "hello world";
  16
  17 void
  18 main_test (void)
  19 {
  20   const char *const foo = "hello world";
  21
  22   if (strstr (foo, "") != foo)
  23     abort ();
  24   if (strstr (foo + 4, "") != foo + 4)
  25     abort ();
  26   if (strstr (foo, "h") != foo)
  27     abort ();
  28   if (strstr (foo, "w") != foo + 6)
  29     abort ();
  30   if (strstr (foo + 6, "o") != foo + 7)
  31     abort ();
  32   if (strstr (foo + 1, "world") != foo + 6)
  33     abort ();
  34   if (strstr (foo + 2, p) != foo + 8)
  35     abort ();
  36   if (strstr (q, "") != q)
  37     abort ();
  38   if (strstr (q + 1, "o") != q + 4)
  39     abort ();
  40
  41   /* Test at least one instance of the __builtin_ style.  We do this
  42      to ensure that it works and that the prototype is correct.  */
  43   if (__builtin_strstr (foo + 1, "world") != foo + 6)
  44     abort ();
  45 }