gnu/dist/gcc4/gcc/testsuite/gcc.c-torture/execute/string-opt-17.c

   1 /* Copyright (C) 2003  Free Software Foundation.
   2
   3    Test strcpy optimizations don't evaluate side-effects twice.
   4
   5    Written by Jakub Jelinek, June 23, 2003.  */
   6
   7 typedef __SIZE_TYPE__ size_t;
   8 extern char *strcpy (char *, const char *);
   9 extern int memcmp (const void *, const void *, size_t);
  10 extern void abort (void);
  11 extern void exit (int);
  12
  13 size_t
  14 test1 (char *s, size_t i)
  15 {
  16   strcpy (s, "foobarbaz" + i++);
  17   return i;
  18 }
  19
  20 size_t
  21 check2 (void)
  22 {
  23   static size_t r = 5;
  24   if (r != 5)
  25     abort ();
  26   return ++r;
  27 }
  28
  29 void
  30 test2 (char *s)
  31 {
  32   strcpy (s, "foobarbaz" + check2 ());
  33 }
  34
  35 int
  36 main (void)
  37 {
  38   char buf[10];
  39   if (test1 (buf, 7) != 8 || memcmp (buf, "az", 3))
  40     abort ();
  41   test2 (buf);
  42   if (memcmp (buf, "baz", 4))
  43     abort ();
  44   exit (0);
  45 }