+ /* For aggregates compare only the size and mode. Accesses to fields do have + a type information by themselves and thus we only care if we can i.e. + use the types in move operations. */ else if (AGGREGATE_TYPE_P (inner_type) && TREE_CODE (inner_type) == TREE_CODE (outer_type)) - return false; + return (!TYPE_SIZE (outer_type) + || (TYPE_SIZE (inner_type) + && operand_equal_p (TYPE_SIZE (inner_type), + TYPE_SIZE (outer_type), 0))); + + else if (TREE_CODE (inner_type) == OFFSET_TYPE + && TREE_CODE (inner_type) == TREE_CODE (outer_type)) + return useless_type_conversion_p (TREE_TYPE (outer_type), + TREE_TYPE (inner_type)) + && useless_type_conversion_p + (TYPE_OFFSET_BASETYPE (outer_type), + TYPE_OFFSET_BASETYPE (inner_type));
The comment says the mode is compared, but I don't see that in the code. Which is right?
Also, wouldn't the final condition be clearer written as > + else if (TREE_CODE (inner_type) == OFFSET_TYPE > + && TREE_CODE (outer_type) == OFFSET_TYPE) Bernd
