bool
variably_modified_type_p (tree type)
{
+ tree t;
+
if (type == error_mark_node)
return false;
We do not yet have a representation of the C99 '[*]' syntax.
When a representation is chosen, this function should be modified
to test for that case as well. */
- if (TYPE_SIZE (type)
- && TYPE_SIZE (type) != error_mark_node
- && TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
+ t = TYPE_SIZE (type);
+ if (t && t != error_mark_node && TREE_CODE (t) != INTEGER_CST)
return true;
- /* If TYPE is a pointer or reference, it is variably modified if
- the type pointed to is variably modified. */
- if ((TREE_CODE (type) == POINTER_TYPE
- || TREE_CODE (type) == REFERENCE_TYPE)
- && variably_modified_type_p (TREE_TYPE (type)))
- return true;
+ switch (TREE_CODE (type))
+ {
+ case POINTER_TYPE:
+ case REFERENCE_TYPE:
+ case ARRAY_TYPE:
+ /* If TYPE is a pointer or reference, it is variably modified if
+ the type pointed to is variably modified. Similarly for arrays;
+ note that VLAs are handled by the TYPE_SIZE check above. */
+ return variably_modified_type_p (TREE_TYPE (type));
- /* If TYPE is an array, it is variably modified if the array
- elements are. (Note that the VLA case has already been checked
- above.) */
- if (TREE_CODE (type) == ARRAY_TYPE
- && variably_modified_type_p (TREE_TYPE (type)))
- return true;
+ case FUNCTION_TYPE:
+ case METHOD_TYPE:
+ /* If TYPE is a function type, it is variably modified if any of the
+ parameters or the return type are variably modified. */
+ {
+ tree parm;
- /* If TYPE is a function type, it is variably modified if any of the
- parameters or the return type are variably modified. */
- if (TREE_CODE (type) == FUNCTION_TYPE
- || TREE_CODE (type) == METHOD_TYPE)
- {
- tree parm;
+ if (variably_modified_type_p (TREE_TYPE (type)))
+ return true;
+ for (parm = TYPE_ARG_TYPES (type);
+ parm && parm != void_list_node;
+ parm = TREE_CHAIN (parm))
+ if (variably_modified_type_p (TREE_VALUE (parm)))
+ return true;
+ }
+ break;
- if (variably_modified_type_p (TREE_TYPE (type)))
+ case INTEGER_TYPE:
+ /* Scalar types are variably modified if their end points
+ aren't constant. */
+ t = TYPE_MIN_VALUE (type);
+ if (t && t != error_mark_node && TREE_CODE (t) != INTEGER_CST)
return true;
- for (parm = TYPE_ARG_TYPES (type);
- parm && parm != void_list_node;
- parm = TREE_CHAIN (parm))
- if (variably_modified_type_p (TREE_VALUE (parm)))
- return true;
+ t = TYPE_MAX_VALUE (type);
+ if (t && t != error_mark_node && TREE_CODE (t) != INTEGER_CST)
+ return true;
+ return false;
+
+ default:
+ break;
}
/* The current language may have other cases to check, but in general,
if (TREE_CODE (addr) == ADDR_EXPR
&& TREE_CODE (TREE_OPERAND (addr, 0)) == FUNCTION_DECL)
return TREE_OPERAND (addr, 0);
-
- /* We couldn't figure out what was being called. */
- return NULL_TREE;
+
+ /* We couldn't figure out what was being called. Maybe the front
+ end has some idea. */
+ return (*lang_hooks.lang_get_callee_fndecl) (call);
}
/* Print debugging information about tree nodes generated during the compile,