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/* { dg-do compile } */

/* { dg-options "-O2 -fdump-tree-optimized" } */

struct abc {

    void (*abc_call)(void);

};

/*

 * Use only any one of the three definitions below at a time:

 *

 * 1. nothing optimized away. Good.

 * 2. call_func() _not_ optimized away, but struct xyz is. gcc disappoints.

 * 3. both call_func() and struct xyz optimized away. Nice.

 */

/* 1 */

/*extern int do_register(struct abc *xyz);*/

/* 2 */

static inline int do_register(struct abc *xyz)

{

    return 0;

}

/* 3 */

/*#define do_register(xyz)    do { (void)(xyz); } while (0)*/

static void call_func(void)

{

}

static struct abc xyz = {

    .abc_call = call_func,

};

void func(void)

{

    do_register(&xyz);

}

/* { dg-final { scan-tree-dump-not "call_func" "optimized"} } */

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