{"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"//"}]}
                    // FIXME: This actually generates tighter assembly, and is a classic trick
                if bx.cx().tcx().sess.opts.optimize == OptLevel::No {
                    // <https://graphics.stanford.edu/~seander/bithacks.html#CopyIntegerSign>