cvt.c (cp_convert_to_pointer): Call force_fit_type for null pointers.

        * cvt.c (cp_convert_to_pointer): Call force_fit_type for null
        pointers.

From-SVN: r55272

gcc/cp/ChangeLog

 2002-07-05  Jason Merrill  <jason@redhat.com>
 
+	* cvt.c (cp_convert_to_pointer): Call force_fit_type for null
+	pointers.
+
 	PR optimization/7145
 	* tree.c (cp_copy_res_decl_for_inlining): Also copy DECL_INITIAL.
 

gcc/cp/cvt.c

@@ -252,6 +252,8 @@ cp_convert_to_pointer (type, expr, force)
       else
 	expr = build_int_2 (0, 0);
       TREE_TYPE (expr) = type;
+      /* Fix up the representation of -1 if appropriate.  */
+      force_fit_type (expr, 0);
       return expr;
     }
 

gcc/testsuite/g++.dg/other/ptrmem3.C

+// Bug: The double cast had an TREE_INT_CST_HIGH of 0, while the single
+// cast had -1, so the comparison failed.
+
+// { dg-do run }
+
+struct A { };
+
+typedef int A::* aip;
+typedef long A::* alp;
+
+int main()
+{
+  return ((aip)(alp)0 != (aip)0);
+}