gcc/testsuite/gcc.dg/pr102798.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O3 -fno-tree-pta" } */
   3
   4 typedef __SIZE_TYPE__ size_t;
   5
   6 __attribute__((__noipa__))
   7 void BUF_reverse (unsigned char *out, const unsigned char *in, size_t size)
   8 {
   9   size_t i;
  10   if (in)
  11     {
  12       out += size - 1;
  13       for (i = 0; i < size; i++)
  14         *out++ = *in++;
  15     }
  16   else
  17     {
  18       unsigned char *q;
  19       char c;
  20       q = out + size - 1;
  21       for (i = 0; i < size ; i++)
  22             {
  23               *out++ = 1;
  24             }
  25     }
  26 }
  27
  28 int
  29 main (void)
  30 {
  31   unsigned char buf[40];
  32   unsigned char buf1[40];
  33   for (unsigned i = 0; i < sizeof (buf); i++)
  34     buf[i] = i;
  35   BUF_reverse (buf, 0, sizeof (buf));
  36   for (unsigned i = 0; i < sizeof (buf); i++)
  37     if (buf[i] != 1)
  38       __builtin_abort ();
  39
  40   return 0;
  41 }