{"ast_node_type":"variable","tokens":[{"end":59,"kind":"keyword","start":0,"text":"let"}]}
    let Some(name) = full_name.strip_prefix("llvm.") else {
fn map_arch_intrinsic(full_name: &str) -> &'static str {
        unimplemented!("***** unsupported LLVM intrinsic {}", full_name)