master 6ec71e8: * src/alloc.c (mark_maybe_object): Make overflow check conditional.

[Philipp Stephani]

branch: master
commit 6ec71e829a272e562c541ef5c93213d2fac3d3d7
Author: Philipp Stephani <phst@google.com>
Commit: Philipp Stephani <phst@google.com>

    * src/alloc.c (mark_maybe_object): Make overflow check conditional.
---
 src/alloc.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/alloc.c b/src/alloc.c
index e556fc8..e139d8c 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -4643,7 +4643,13 @@ mark_maybe_object (Lisp_Object obj)
 
   bool overflow
     = INT_SUBTRACT_WRAPV (offset, LISP_WORD_TAG (type_tag), &offset);
+#if !defined WIDE_EMACS_INT || USE_LSB_TAG
+  /* If we don't use wide integers, then `intptr_t' should always be
+     large enough to not overflow.  Furthermore, when using the least
+     significant bits as tag bits, the tag is small enough to not
+     overflow either.  */
   eassert (!overflow);
+#endif
   void *po = (char *) ((intptr_t) (char *) XLP (obj) + offset);
 
   /* If the pointer is in the dump image and the dump has a record