syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // Always sign extend u32 values on 64-bit mips
context_before: fn extend_integer_width_mips<Ty>(arg: &mut ArgAbi<'_, Ty>, bits: u64) {
context_after:     if let BackendRepr::Scalar(scalar) = arg.layout.backend_repr