gcc/testsuite/gcc.c-torture/execute/builtins/fputs.c

   1 /* Copyright (C) 2000, 2001  Free Software Foundation.
   2
   3    Ensure all expected transformations of builtin fputs occur and that
   4    we honor side effects in the stream argument.
   5
   6    Written by Kaveh R. Ghazi, 10/30/2000.  */
   7
   8 #include <stdio.h>
   9 extern void abort(void);
  10
  11 int i;
  12
  13 void
  14 main_test(void)
  15 {
  16   FILE *s_array[] = {stdout, NULL}, **s_ptr = s_array;
  17   const char *const s1 = "hello world";
  18
  19   fputs ("", *s_ptr);
  20   fputs ("\n", *s_ptr);
  21   fputs ("bye", *s_ptr);
  22   fputs (s1, *s_ptr);
  23   fputs (s1+5, *s_ptr);
  24   fputs (s1+10, *s_ptr);
  25   fputs (s1+11, *s_ptr);
  26
  27   /* Check side-effects when transforming fputs -> NOP.  */
  28   fputs ("", *s_ptr++);
  29   if (s_ptr != s_array+1 || *s_ptr != 0)
  30     abort();
  31
  32   /* Check side-effects when transforming fputs -> fputc.  */
  33   s_ptr = s_array;
  34   fputs ("\n", *s_ptr++);
  35   if (s_ptr != s_array+1 || *s_ptr != 0)
  36     abort();
  37
  38   /* Check side-effects when transforming fputs -> fwrite.  */
  39   s_ptr = s_array;
  40   fputs ("hello\n", *s_ptr++);
  41   if (s_ptr != s_array+1 || *s_ptr != 0)
  42     abort();
  43
  44   /* Test at least one instance of the __builtin_ style.  We do this
  45      to ensure that it works and that the prototype is correct.  */
  46   s_ptr = s_array;
  47   __builtin_fputs ("", *s_ptr);
  48   /* These builtin stubs are called by __builtin_fputs, ensure their
  49      prototypes are set correctly too.  */
  50   __builtin_fputc ('\n', *s_ptr);
  51   __builtin_fwrite ("hello\n", 1, 6, *s_ptr);
  52   /* Check the unlocked style, these evaluate to nothing to avoid
  53      problems on systems without the unlocked functions.  */
  54   fputs_unlocked ("", *s_ptr);
  55   __builtin_fputs_unlocked ("", *s_ptr);
  56
  57   /* Check side-effects in conditional expression.  */
  58   s_ptr = s_array;
  59   fputs (i++ ? "f" : "x", *s_ptr++);
  60   if (s_ptr != s_array+1 || *s_ptr != 0 || i != 1)
  61     abort();
  62   fputs (--i ? "\n" : "\n", *--s_ptr);
  63   if (s_ptr != s_array || i != 0)
  64     abort();
  65 }