gcc/testsuite/gcc.c-torture/execute/string-opt-17.c

   1 /* Copyright (C) 2002  Free Software Foundation.
   2
   3    Ensure that builtin memset operations for constant length and
   4    non-constant assigned value don't cause compiler problems.
   5
   6    Written by Roger Sayle, 21 April 2002.  */
   7
   8 extern void abort (void);
   9 typedef __SIZE_TYPE__ size_t;
  10 extern void *memset (void *, int, size_t);
  11
  12 char buffer[32];
  13
  14 int
  15 main (int argc)
  16 {
  17   memset (buffer, argc, 0);
  18   memset (buffer, argc, 1);
  19   memset (buffer, argc, 2);
  20   memset (buffer, argc, 3);
  21   memset (buffer, argc, 4);
  22   memset (buffer, argc, 5);
  23   memset (buffer, argc, 6);
  24   memset (buffer, argc, 7);
  25   memset (buffer, argc, 8);
  26   memset (buffer, argc, 9);
  27   memset (buffer, argc, 10);
  28   memset (buffer, argc, 11);
  29   memset (buffer, argc, 12);
  30   memset (buffer, argc, 13);
  31   memset (buffer, argc, 14);
  32   memset (buffer, argc, 15);
  33   memset (buffer, argc, 16);
  34   memset (buffer, argc, 17);
  35
  36   return 0;
  37 }
  38
  39 #ifdef __OPTIMIZE__
  40 /* When optimizing, most of the above cases should be transformed into
  41    something else.  So any remaining calls to the original function
  42    for short lengths should abort.  */
  43 static void *
  44 memset (void *dst, int c, size_t len)
  45 {
  46   if (len < 2)
  47     abort ();
  48 }
  49 #endif
  50