gcc/testsuite/gcc.target/s390/pr36822.c

   1 /* This used to ICE on s390 due to bug in the definition of the 'R'
   2    constraint which replaced the 'm' constraint (together with 'T')
   3    while adding z10 support.  */
   4
   5 /* { dg-do compile } */
   6 /* { dg-options "-O" } */
   7
   8 int boo()
   9 {
  10   struct {
  11     unsigned char pad[4096];
  12     unsigned long bar;
  13   } *foo;
  14   asm volatile( "" : "=m" (*(unsigned long long*)(foo->bar))
  15                 : "a" (&foo->bar));
  16 }