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/* { dg-do compile } */

/* { dg-options "-O2 -fdump-tree-dom2-details" } */

struct tree_common

{

  int code;

};

union tree_node

{

  struct tree_common common;

};

typedef union tree_node *tree;

extern tree test (tree, int, int);

extern tree foo (void);

extern void abort (void) __attribute__ ((__noreturn__));

tree

test (tree expr, int t, int D17630)

{

  int __i;

L0:

  if (expr->common.code != 142) goto L23; else goto L2;

L2:

  __i = 0;

  goto L10;

L10:

  __i = __i + 1;

  if (D17630 != __i) goto L8; else goto L19;

L8:

  if (t) goto L15; else goto L10;

L15:

  expr = foo ();

  if (expr->common.code != 142) goto L23; else goto L0;

L19:

  abort ();

L23:

  return expr;

}

/* We should thread the backedge to the top of the loop; ie we only

   execute the if (expr->common.code != 142) test once per loop

   iteration.  */

/* { dg-final { scan-tree-dump-times "Threaded jump" 1 "dom2" } } */

/* { dg-final { cleanup-tree-dump "dom2" } } */