Function cusparseZcsric02_analysis 

pub unsafe extern "C" fn cusparseZcsric02_analysis(
    handle: cusparseHandle_t,
    m: c_int,
    nnz: c_int,
    descrA: cusparseMatDescr_t,
    csrSortedValA: *const cuDoubleComplex,
    csrSortedRowPtrA: *const c_int,
    csrSortedColIndA: *const c_int,
    info: csric02Info_t,
    policy: cusparseSolvePolicy_t,
    pBuffer: *mut c_void,
) -> cusparseStatus_t

This function performs the analysis phase of the incomplete-Cholesky factorization with $0$ fill-in and no pivoting:

A is an $m \times m$ sparse matrix that is defined in CSR storage format by the three arrays csrValA, csrRowPtrA, and csrColIndA.

This function requires a buffer size returned by csric02_bufferSize(). The address of pBuffer must be multiple of 128 bytes. If not, cusparseStatus_t::CUSPARSE_STATUS_INVALID_VALUE is returned.

Function csric02_analysis() reports a structural zero and computes level information stored in the opaque structure info. The level information can extract more parallelism during incomplete Cholesky factorization. However csric02() can be done without level information. To disable level information, the user must specify the policy of csric02_analysis() and csric02() as cusparseSolvePolicy_t::CUSPARSE_SOLVE_POLICY_NO_LEVEL.

Function csric02_analysis() always reports the first structural zero, even if the policy is cusparseSolvePolicy_t::CUSPARSE_SOLVE_POLICY_NO_LEVEL. The user needs to call cusparseXcsric02_zeroPivot to know where the structural zero is.

It is the user’s choice whether to call csric02() if csric02_analysis() reports a structural zero. In this case, the user can still call csric02(), which will return a numerical zero at the same position as the structural zero. However the result is meaningless.

• This function requires temporary extra storage that is allocated internally
• The routine supports asynchronous execution if the Stream Ordered Memory Allocator is available
• The routine supports CUDA graph capture if the Stream Ordered Memory Allocator is available.