if (!llvm::hasSingleElement(callers) &&
        !llvm::all_of(callers.drop_front(), [&](Operation* caller) {
          /// TODO(aminim): this is overly conservative as some operations
          /// (like TPUPartitionedCallOp) may have extra operands that aren't
          /// propagated to the callee.
          return isa<CallOpInterface>(caller) &&
                 std::equal(caller->getOperandTypes().begin(),