gcc/testsuite/c-c++-common/pr58346-3.c

   1 /* PR c/58346 */
   2 /* { dg-do compile } */
   3
   4 void
   5 foo (void)
   6 {
   7   __PTRDIFF_TYPE__ d;
   8   const int i = 0;
   9   int a1[2][0], a2[2][0];
  10   int b1[3][i], b2[4][i];
  11   d = a1 - a2; /* { dg-error "arithmetic on pointer to an empty aggregate" } */
  12   __asm volatile ("" : "+g" (d));
  13   /* No error here for C.  */
  14   d = b1 - b2; /* { dg-error "arithmetic on pointer to an empty aggregate" "" { target c++ } } */
  15   __asm volatile ("" : "+g" (d));
  16 }