samples/reducer/test/reduce.mlir

// This file contains a file that compiles down to VM dialect.
//
// The contents of this file do not matter, it is simply used to show the
// reduction in the size of the test case. The assumed bug in this file is that
// when the file is lowered to VM dialect, it produces the operation "vm.add",
// which is assumed to have a bug. The interesting.py script simply greps for
// "vm.add" in the output of the compilation.
// 
// The expected reduced test case output can be seen in output.mlir file.

!tmp_tensor_t = tensor<16x128xf32>
!in_tensor_t = tensor<16x128x128xf32>
!out_tensor_t = tensor<16x128x128xf32>

func.func @func(%input : !out_tensor_t) -> !out_tensor_t {
  %cst_0 = arith.constant 0.0 : f32
  %cst_1 = arith.constant 1.0 : f32
  %cst_min = arith.constant -3.40282347E+38 : f32

  %input_max_empty = tensor.empty() : !tmp_tensor_t
  %input_max_filled = linalg.fill ins(%cst_min : f32)
    outs(%input_max_empty : !tmp_tensor_t) -> !tmp_tensor_t
  %input_max = linalg.generic
    {indexing_maps = [affine_map<(d0, d1, d2) -> (d0, d1, d2)>,
                      affine_map<(d0, d1, d2) -> (d0, d1)>],
                      iterator_types = ["parallel", "parallel", "reduction"]}
     ins(%input : !in_tensor_t)
    outs(%input_max_filled : !tmp_tensor_t) {
      ^bb0(%arg0: f32, %arg1: f32):
        %max = arith.maximumf %arg0, %arg1 : f32
        linalg.yield %max : f32
      } -> !tmp_tensor_t

  %exps_empty = tensor.empty() : !out_tensor_t
  %exps_sum_empty = tensor.empty() : !tmp_tensor_t
  %exps_sum_filled = linalg.fill ins(%cst_0 : f32)
    outs(%exps_sum_empty : !tmp_tensor_t) -> !tmp_tensor_t
  %exps = linalg.generic
    {indexing_maps = [affine_map<(d0, d1, d2) -> (d0, d1, d2)>,
                      affine_map<(d0, d1, d2) -> (d0, d1)>,
                      affine_map<(d0, d1, d2) -> (d0, d1, d2)>],
                      iterator_types = ["parallel", "parallel", "parallel"]}
     ins(%input, %input_max : !in_tensor_t, !tmp_tensor_t)
    outs(%exps_empty : !out_tensor_t) {
      ^bb0(%arg0: f32, %arg1: f32, %arg2: f32):
        %sub = arith.subf %arg0, %arg1 : f32
        %exp = math.exp %sub : f32
        linalg.yield %exp: f32
      } -> (!out_tensor_t)

  %exps_sum = linalg.generic
    {indexing_maps = [affine_map<(d0, d1, d2) -> (d0, d1, d2)>,
                      affine_map<(d0, d1, d2) -> (d0, d1)>],
                      iterator_types = ["parallel", "parallel", "reduction"]}
     ins(%exps : !out_tensor_t)
    outs(%exps_sum_filled : !tmp_tensor_t) {
      ^bb0(%exp: f32, %acc: f32):
        %add = arith.addf %exp, %acc : f32
        linalg.yield %add : f32
      } -> (!tmp_tensor_t)

  %res_empty = tensor.empty() : !out_tensor_t
  %res = linalg.generic
    {indexing_maps = [affine_map<(d0, d1, d2) -> (d0, d1, d2)>,
                      affine_map<(d0, d1, d2) -> (d0, d1)>,
                      affine_map<(d0, d1, d2) -> (d0, d1, d2)>],
                      iterator_types = ["parallel", "parallel", "parallel"]}
     ins(%exps, %exps_sum : !out_tensor_t, !tmp_tensor_t)
    outs(%res_empty : !out_tensor_t) {
      ^bb0(%arg0: f32, %arg1: f32, %arg2: f32):
        %div = arith.addf %arg0, %arg1 : f32
        linalg.yield %div : f32
      } -> !out_tensor_t

  return %res: !out_tensor_t
}