{"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"if"}]}
        if self.known_to_be_zst(op_ty) {
        let op_ty = operand.ty(self.local_decls, self.tcx);
            *operand = Operand::Constant(Box::new(self.make_zst(op_ty)))