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/* { dg-do compile } */
/* { dg-options "-O2 -fno-tree-dce -fno-tree-ccp -fno-tree-copy-prop -fno-tree-dominator-opts" } */
 
/* This caused the compiler to enter an infinite loop if copies are not
   fully propagated.   The options are to disable copy propagation and
   thus expose the bug.   */
 
int foo (void);
 
struct A {
  struct B {
    struct B *n;
  } *p;
};
 
static inline void baz (struct A *a)
{
  a->p = a->p->n;
}
 
void bar (struct A a)
{
  while (foo ())
    baz (&a);
  while (foo ());
}