syntax_data: {"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // `fn_arg_sanity_check` accepts `PassMode::Direct` for some aggregates.
context_before:         self.layout.eq_abi(&other.layout) && self.mode.eq_abi(&other.mode) && {
context_after:             // That elevates any type difference to an ABI difference since we just use the