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/* This used to ICE on s390 due to bug in the definition of the 'R'

   constraint which replaced the 'm' constraint (together with 'T')

   while adding z10 support.  */

/* { dg-do compile } */

/* { dg-options "-O" } */

int boo()

{

  struct {

    unsigned char pad[4096];

    unsigned long bar;

  } *foo;

  asm volatile( "" : "=m" (*(unsigned long long*)(foo->bar))

                : "a" (&foo->bar));

}