1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-dse1-details" } */
       3  
       4  struct X { int x; };
       5  struct X x;
       6  
       7  extern struct X foo (void);
       8  void bar()
       9  {
      10    x = foo();
      11    x = (struct X){};
      12  }
      13  
      14  extern struct X __attribute__((const)) foo2 (int);
      15  void bar2()
      16  {
      17    x = foo2 (1);
      18    x = foo2 (2);
      19  }
      20  
      21  /* { dg-final { scan-tree-dump-times "Deleted dead store in call LHS: x = foo " 1 "dse1" } } */
      22  /* { dg-final { scan-tree-dump-times "Deleted dead store: x = foo2 " 1 "dse1" } } */