syntax_data: {"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // but at this stage we don't know whether codegen knows the intrinsic,
context_before:     // Intrinsic fallback bodies are automatically made cross-crate inlineable,
context_after:     // so just conservatively don't inline it. This also ensures that we do not