{"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"//"}]}
    // identical. We run opts before AD, so there is a chance that LLVM will merge our dummies.
    // We also must disable merge_functions, since autodiff placeholder/dummy bodies tend to be
    // In that case, we lack some dummy bodies and can't replace them with the real AD code anymore.