semantics.c (potential_constant_expression_1): Handle destructor call.

	* semantics.c (potential_constant_expression_1): Handle destructor
	call.

From-SVN: r174819

gcc/cp/ChangeLog

+2011-06-08  Jason Merrill  <jason@redhat.com>
+
+	* semantics.c (potential_constant_expression_1): Handle destructor
+	call.
+
 2011-06-08  Jakub Jelinek  <jakub@redhat.com>
 
 	* cp-tree.h (struct tinst_level): Add chain_next GTY

gcc/cp/semantics.c

@@ -7763,6 +7763,12 @@ potential_constant_expression_1 (tree t, bool want_rval, tsubst_flags_t flags)
       want_rval = true;
       goto binary;
 
+    case BIT_NOT_EXPR:
+      /* A destructor.  */
+      if (TYPE_P (TREE_OPERAND (t, 0)))
+	return true;
+      /* else fall through.  */
+
     case REALPART_EXPR:
     case IMAGPART_EXPR:
     case CONJ_EXPR:
@@ -7771,7 +7777,6 @@ potential_constant_expression_1 (tree t, bool want_rval, tsubst_flags_t flags)
     case FLOAT_EXPR:
     case NEGATE_EXPR:
     case ABS_EXPR:
-    case BIT_NOT_EXPR:
     case TRUTH_NOT_EXPR:
     case FIXED_CONVERT_EXPR:
     case UNARY_PLUS_EXPR: