1  /* Another test case for over-eager multiple include optimization,
       2     where the leading "#if !defined" expression is obtained partially,
       3     or wholly, from macros.  Neil Booth, 30 Sep 2001.  */
       4  
       5  /* { dg-do compile } */
       6  /* { dg-options "" } */
       7  
       8  extern void abort (void);
       9  
      10  /* Each include file should not be subject to MI optimisation, since
      11     macro definitions can change.  Each header increments the variable
      12     VAR if it is defined.
      13  
      14     The first set of inclusions gets the headers into CPP's cache, but
      15     does nothing since VAR is not defined.  The second set should each
      16     increment VAR, since none of the initial set should have been
      17     flagged as optimizable.  */
      18  
      19  #define EMPTYL
      20  #define EMPTYR
      21  #define NOT !
      22  #define DEFINED defined (guard)
      23  #define NOT_DEFINED ! defined (guard)
      24  
      25  #include "mi6a.h"
      26  #include "mi6b.h"
      27  #include "mi6c.h"
      28  #include "mi6d.h"
      29  #include "mi6e.h"
      30  
      31  /* Define the macro guard, and redefine the macros to something that
      32     forces compilation of the conditional blocks.  */
      33  #define guard
      34  #undef EMPTYL
      35  #define EMPTYL 1 ||
      36  #undef EMPTYR
      37  #define EMPTYR || 1
      38  #undef NOT
      39  #define NOT
      40  #undef DEFINED
      41  #define DEFINED 0
      42  #undef NOT_DEFINED
      43  #define NOT_DEFINED 1
      44  
      45  #define VAR five
      46  
      47  int
      48  main(void)
      49  {
      50    unsigned int five = 0;
      51  
      52  #include "mi6a.h"
      53  #include "mi6b.h"
      54  #include "mi6c.h"
      55  #include "mi6d.h"
      56  #include "mi6e.h"
      57  
      58    if (five != 5)
      59      abort ();
      60    return 0;
      61  }