Function mlir_sys::mlirBlockInsertOwnedOperationBefore

pub unsafe extern "C" fn mlirBlockInsertOwnedOperationBefore(
    block: MlirBlock,
    reference: MlirOperation,
    operation: MlirOperation
)

Takes an operation owned by the caller and inserts it before the (non-owned) reference operation in the given block. If the reference is null, appends the operation. Otherwise, the reference must belong to the block.