{"ast_node_type":"variable","tokens":[{"end":66,"kind":"keyword","start":0,"text":"let"}]}
    let len = unsafe { llvm::LLVMRustGetTargetFeaturesCount(tm) };
fn llvm_target_features(tm: &llvm::TargetMachine) -> Vec<(&str, &str)> {
    let mut ret = Vec::with_capacity(len);