Updated variant using HOST_WIDE_INT_PRINT. Tested for i686-w64-mingw32 and x86_64-w64-mingw32. Ok for apply?
Kai Index: tree-dump.c =================================================================== --- tree-dump.c (Revision 193925) +++ tree-dump.c (Arbeitskopie) @@ -177,7 +177,8 @@ void dump_pointer (dump_info_p di, const char *field, void *ptr) { dump_maybe_newline (di); - fprintf (di->stream, "%-4s: %-8lx ", field, (unsigned long) ptr); + fprintf (di->stream, "%-4s: %-8" HOST_WIDE_INT_PRINT "x ", field, + (HOST_WIDE_INT) (uintptr_t) ptr); di->column += 15; }