Converter:Bugfix: Fix bug for einsum for 4 - 4 not care about transposeA

tools/converter/source/optimizer/onnxextra/OnnxEinsum.cpp

@@ -139,16 +139,22 @@ class OnnxEinsumTransform : public OnnxExtraManager::Transform {
  }
  // find reduce dim
  char reduce_dim;
+ int reduce_dim_pos = -1;
  for (int i = 0; i < input0.size(); ++i) {
  auto c = input0[i];
  if (right.find(c) == std::string::npos) {
  reduce_dim = c;
+ reduce_dim_pos = i;
  break;
  }
  }
+ bool needTransposeA = false;
+ if (reduce_dim_pos >= 0 && input0.size() >= 2 && reduce_dim_pos == input0.size() - 2) {
+ needTransposeA = true;
+ }
  auto need_transpose = input1.find(reduce_dim) == (input1.size() - 1);
  // matmul: matmul auto broadcast such: `bhwc @ hkc` -> `bhwc @ bhkc`
- auto output = _MatMul(var0, var1, false, need_transpose);
+ auto output = _MatMul(var0, var1, needTransposeA, need_transpose);
  // squeeze
  if (sqeeze_axis >= 0) {
  output = _Squeeze(output, {sqeeze_axis});