gcc/testsuite/gcc.c-torture/execute/pr65369.c

   1 /* PR tree-optimization/65369 */
   2 #include <stdint.h>
   3
   4 static const char data[] =
   5   "12345678901234567890123456789012345678901234567890"
   6   "123456789012345678901234567890";
   7
   8 __attribute__ ((noinline))
   9 static void foo (const unsigned int *buf)
  10 {
  11   if (__builtin_memcmp (buf, data, 64))
  12     __builtin_abort ();
  13 }
  14
  15 __attribute__ ((noinline))
  16 static void bar (const unsigned char *block)
  17 {
  18   uint32_t buf[16];
  19   __builtin_memcpy (buf +  0, block +  0, 4);
  20   __builtin_memcpy (buf +  1, block +  4, 4);
  21   __builtin_memcpy (buf +  2, block +  8, 4);
  22   __builtin_memcpy (buf +  3, block + 12, 4);
  23   __builtin_memcpy (buf +  4, block + 16, 4);
  24   __builtin_memcpy (buf +  5, block + 20, 4);
  25   __builtin_memcpy (buf +  6, block + 24, 4);
  26   __builtin_memcpy (buf +  7, block + 28, 4);
  27   __builtin_memcpy (buf +  8, block + 32, 4);
  28   __builtin_memcpy (buf +  9, block + 36, 4);
  29   __builtin_memcpy (buf + 10, block + 40, 4);
  30   __builtin_memcpy (buf + 11, block + 44, 4);
  31   __builtin_memcpy (buf + 12, block + 48, 4);
  32   __builtin_memcpy (buf + 13, block + 52, 4);
  33   __builtin_memcpy (buf + 14, block + 56, 4);
  34   __builtin_memcpy (buf + 15, block + 60, 4);
  35   foo (buf);
  36 }
  37
  38 int
  39 main ()
  40 {
  41   unsigned char input[sizeof data + 16] __attribute__((aligned (16)));
  42   __builtin_memset (input, 0, sizeof input);
  43   __builtin_memcpy (input + 1, data, sizeof data);
  44   bar (input + 1);
  45   return 0;
  46 }