gcc/testsuite/gcc.dg/asm-1.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target int32plus } */
   3
   4 struct x {
   5   int selector;
   6 };
   7
   8 void f()
   9 {
  10   struct x* addr;
  11   __asm__("mov %%gs,%0":"=r" ((unsigned short)addr->selector)); /* { dg-error "lvalue" "casts make rvalues" } */
  12 }