* mi6.c, mi6a.h, mi6b.h, mi6c.h, mi6d.h, mi6e.h: New test.

From-SVN: r45900

gcc/testsuite/ChangeLog

 2001-09-30  Neil Booth  <neil@daikokuya.demon.co.uk>
 
+	* mi6.c, mi6a.h, mi6b.h, mi6c.h, mi6d.h, mi6e.h: New test.
+
+2001-09-30  Neil Booth  <neil@daikokuya.demon.co.uk>
+
 	* gcc.dg/cpp/redef2.c: Add test.
 
 2001-09-27  Geoffrey Keating  <geoffk@redhat.com>

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

+/* Another test case for over-eager multiple include optimization,
+   where the leading "#if !defined" expression is obtained partially,
+   or wholly, from macros.  Neil Booth, 30 Sep 2001.  */
+
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+/* Each include file should not be subject to MI optimisation, since
+   macro definitions can change.  Each header increments the variable
+   VAR if it is defined.
+
+   The first set of inclusions gets the headers into CPP's cache, but
+   does nothing since VAR is not defined.  The second set should each
+   increment VAR, since none of the initial set should have been
+   flagged as optimizable.  */
+
+#define EMPTY
+#define NOT !
+#define DEFINED defined (macro)
+#define IND ! defined (macro)
+
+#include "mi6a.h"
+#include "mi6b.h"
+#include "mi6c.h"
+#include "mi6d.h"
+#include "mi6e.h"
+
+#define VAR five
+
+int
+main(void)
+{
+  unsigned int five = 0;
+
+#include "mi6a.h"
+#include "mi6b.h"
+#include "mi6c.h"
+#include "mi6d.h"
+#include "mi6e.h"
+
+  if (five != 5)
+    abort ();
+  return 0;
+}

gcc/testsuite/gcc.dg/cpp/mi6a.h

+#if IND
+ #ifdef VAR
+   VAR++;
+ #endif
+#endif

gcc/testsuite/gcc.dg/cpp/mi6b.h

+#if NOT defined (macro)
+ #ifdef VAR
+   VAR++;
+ #endif
+#endif

gcc/testsuite/gcc.dg/cpp/mi6c.h

+#if !DEFINED
+ #ifdef VAR
+   VAR++;
+ #endif
+#endif

gcc/testsuite/gcc.dg/cpp/mi6d.h

+#if EMPTY !defined (macro)
+ #ifdef VAR
+   VAR++;
+ #endif
+#endif

gcc/testsuite/gcc.dg/cpp/mi6e.h

+#if !defined (macro) EMPTY
+ #ifdef VAR
+   VAR++;
+ #endif
+#endif