{"ast_node_type":"variable","tokens":[{"end":40,"kind":"keyword","start":0,"text":"let"}]}
        let n: u64 = if idx_ty.is_simd()
        let idx_ty = args[2].layout.ty;
            && matches!(*idx_ty.simd_size_and_type(bx.cx.tcx).1.kind(), ty::Uint(ty::UintTy::U32))