syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"BackendRepr::SimdVector"}]}
source_snippet:         BackendRepr::SimdVector { .. } => return Err(CannotUseFpConv),
context_before:         },
context_after:         BackendRepr::ScalarPair(..) | BackendRepr::Memory { .. } => match arg_layout.fields {