gcc/testsuite/gcc.dg/cpp/trad/mi6.c

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