tree
cxx_sizeof_or_alignof_type (tree type, enum tree_code op, bool complain)
{
- enum tree_code type_code;
tree value;
- const char *op_name;
gcc_assert (op == SIZEOF_EXPR || op == ALIGNOF_EXPR);
if (type == error_mark_node)
return error_mark_node;
- if (dependent_type_p (type))
- {
- value = build_min (op, size_type_node, type);
- TREE_READONLY (value) = 1;
- return value;
- }
-
- op_name = operator_name_info[(int) op].name;
-
type = non_reference (type);
- type_code = TREE_CODE (type);
-
- if (type_code == METHOD_TYPE)
+ if (TREE_CODE (type) == METHOD_TYPE)
{
if (complain && (pedantic || warn_pointer_arith))
- pedwarn ("invalid application of %qs to a member function", op_name);
+ pedwarn ("invalid application of %qs to a member function",
+ operator_name_info[(int) op].name);
value = size_one_node;
}
- else
- value = c_sizeof_or_alignof_type (complete_type (type),
- op == SIZEOF_EXPR,
- complain);
- return value;
+ if (dependent_type_p (type)
+ /* VLA types will have a non-constant size. In the body of an
+ uninstantiated template, we don't need to try to compute the
+ value, because the sizeof expression is not an integral
+ constant expression in that case. And, if we do try to
+ compute the value, we'll likely end up with SAVE_EXPRs, which
+ the template substitution machinery does not expect to see. */
+ || (processing_template_decl &&
+ TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST))
+ {
+ value = build_min (op, size_type_node, type);
+ TREE_READONLY (value) = 1;
+ return value;
+ }
+
+ return c_sizeof_or_alignof_type (complete_type (type),
+ op == SIZEOF_EXPR,
+ complain);
}
/* Process a sizeof expression where the operand is an expression. */