// RUN: mlir-opt %s \
// RUN:   --sparsification --sparse-tensor-conversion \
// RUN:   --convert-vector-to-scf --convert-scf-to-std \
// RUN:   --func-bufferize --tensor-constant-bufferize --tensor-bufferize \
// RUN:   --std-bufferize --finalizing-bufferize  \
// RUN:   --convert-vector-to-llvm --convert-memref-to-llvm --convert-std-to-llvm | \
// RUN: TENSOR0="%mlir_integration_test_dir/data/test.mtx" \
// RUN: mlir-cpu-runner \
// RUN:  -e entry -entry-point-result=void  \
// RUN:  -shared-libs=%mlir_integration_test_dir/libmlir_c_runner_utils%shlibext | \
// RUN: FileCheck %s

!Filename = type !llvm.ptr<i8>

#SparseMatrix = #sparse_tensor.encoding<{
  dimLevelType = [ "compressed", "compressed" ]
}>

#trait_sum_reduce = {
  indexing_maps = [
    affine_map<(i,j) -> (i,j)>, // A
    affine_map<(i,j) -> ()>     // x (out)
  ],
  iterator_types = ["reduction", "reduction"],
  doc = "x += A(i,j)"
}

//
// Integration test that lowers a kernel annotated as sparse to
// actual sparse code, initializes a matching sparse storage scheme
// from file, and runs the resulting code with the JIT compiler.
//
module {
  //
  // A kernel that sum-reduces a matrix to a single scalar.
  //
  func @kernel_sum_reduce(%arga: tensor<?x?xf64, #SparseMatrix>,
                          %argx: tensor<f64>) -> tensor<f64> {
    %0 = linalg.generic #trait_sum_reduce
      ins(%arga: tensor<?x?xf64, #SparseMatrix>)
      outs(%argx: tensor<f64>) {
      ^bb(%a: f64, %x: f64):
        %0 = addf %x, %a : f64
        linalg.yield %0 : f64
    } -> tensor<f64>
    return %0 : tensor<f64>
  }

  func private @getTensorFilename(index) -> (!Filename)

  //
  // Main driver that reads matrix from file and calls the sparse kernel.
  //
  func @entry() {
    %d0 = constant 0.0 : f64
    %c0 = constant 0 : index

    // Setup memory for a single reduction scalar,
    // initialized to zero.
    %xdata = memref.alloc() : memref<f64>
    memref.store %d0, %xdata[] : memref<f64>
    %x = memref.tensor_load %xdata : memref<f64>

    // Read the sparse matrix from file, construct sparse storage.
    %fileName = call @getTensorFilename(%c0) : (index) -> (!Filename)
    %a = sparse_tensor.new %fileName : !Filename to tensor<?x?xf64, #SparseMatrix>

    // Call the kernel.
    %0 = call @kernel_sum_reduce(%a, %x)
      : (tensor<?x?xf64, #SparseMatrix>, tensor<f64>) -> tensor<f64>

    // Print the result for verification.
    //
    // CHECK: 28.2
    //
    %m = memref.buffer_cast %0 : memref<f64>
    %v = memref.load %m[] : memref<f64>
    vector.print %v : f64

    // Release the resources.
    memref.dealloc %xdata : memref<f64>

    return
  }
}