* lisp.h (XPNTR): Obey DATA_SEG_BITS in all non-USE_LSB_TAG cases (Bug#6811).

Remove unused HAVE_SHM branch.

2 files changed, 20 insertions, 24 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 874a3bc5bcd..297ea12aee7 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,4 +1,10 @@
+2011-01-23  Chong Yidong  <cyd@stupidchicken.com>
+
+	* lisp.h (XPNTR): Obey DATA_SEG_BITS in all non-USE_LSB_TAG cases.
+	Remove unused HAVE_SHM branch (Bug#6811).
+
 2011-01-23  Peter O'Gorman  <bug-gnu-emacs@mlists.thewrittenword.com>  (tiny change)
+
 	* s/hpux11.h: Set CANNOT_DUMP on IA64 (Bug#6811).
 
 2011-01-22  Martin Rudalics  <rudalics@gmx.at>
diff --git a/src/lisp.h b/src/lisp.h
index 4f64425e913..34330b0e6c6 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -432,7 +432,13 @@ enum pvec_type
 #define XSET(var, type, ptr) \
    ((var) = ((EMACS_INT)(type) << VALBITS) + ((EMACS_INT) (ptr) & VALMASK))
 
+#ifdef DATA_SEG_BITS
+/* DATA_SEG_BITS forces extra bits to be or'd in with any pointers
+   which were stored in a Lisp_Object */
+#define XPNTR(a) ((EMACS_UINT) (((a) & VALMASK) | DATA_SEG_BITS))
+#else
 #define XPNTR(a) ((EMACS_UINT) ((a) & VALMASK))
+#endif
 
 #endif /* not USE_LSB_TAG */
 
@@ -482,6 +488,14 @@ enum pvec_type
 # define XSET(var, vartype, ptr) \
    (((var).s.val = ((EMACS_INT) (ptr))), ((var).s.type = ((char) (vartype))))
 
+#ifdef DATA_SEG_BITS
+/* DATA_SEG_BITS forces extra bits to be or'd in with any pointers
+   which were stored in a Lisp_Object */
+#define XPNTR(a) (XUINT (a) | DATA_SEG_BITS)
+#else
+#define XPNTR(a) ((EMACS_INT) XUINT (a))
+#endif
+
 #endif	/* !USE_LSB_TAG */
 
 #if __GNUC__ >= 2 && defined (__OPTIMIZE__)
@@ -503,30 +517,6 @@ extern Lisp_Object make_number P_ ((EMACS_INT));
 
 #define EQ(x, y) (XHASH (x) == XHASH (y))
 
-#ifndef XPNTR
-#ifdef HAVE_SHM
-/* In this representation, data is found in two widely separated segments.  */
-extern size_t pure_size;
-#define XPNTR(a) \
-  (XUINT (a) | (XUINT (a) > pure_size ? DATA_SEG_BITS : PURE_SEG_BITS))
-#else /* not HAVE_SHM */
-#ifdef DATA_SEG_BITS
-/* This case is used for the rt-pc.
-   In the diffs I was given, it checked for ptr = 0
-   and did not adjust it in that case.
-   But I don't think that zero should ever be found
-   in a Lisp object whose data type says it points to something.  */
-#define XPNTR(a) (XUINT (a) | DATA_SEG_BITS)
-#else
-/* Some versions of gcc seem to consider the bitfield width when
-   issuing the "cast to pointer from integer of different size"
-   warning, so the cast is here to widen the value back to its natural
-   size.  */
-#define XPNTR(a) ((EMACS_INT) XUINT (a))
-#endif
-#endif /* not HAVE_SHM */
-#endif /* no XPNTR */
-
 /* Largest and smallest representable fixnum values.  These are the C
    values.  */