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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 ());

}