fix trt convert fc_op'oss (#33566)

paddle/fluid/inference/tensorrt/convert/fc_op.cc

@@ -48,6 +48,7 @@ class FcOpConverter : public OpConverter {
     }
     // Declare inputs
     auto* X = engine_->GetITensor(op_desc.Input(i_name).front());
+    auto x_dim = X->getDimensions();
     // Declare weights
     auto* Y_v = scope.FindVar(op_desc.Input(w_name).front());
     PADDLE_ENFORCE_NOT_NULL(
@@ -138,7 +139,13 @@ class FcOpConverter : public OpConverter {
             ("fc_layer_before(Output: " + output_name + ")").c_str());
         // add shuffle after fc
         nvinfer1::Dims reshape_after_fc_dim;
-        reshape_after_fc_dim.nbDims = x_num_col_dims + 1;
+        if (engine_->use_oss() && engine_->with_ernie() && x_dim.nbDims == 4 &&
+            x_dim.d[2] == 1 && x_dim.d[3] == 1 && x_num_col_dims == 1) {
+          // If use tensorrt'oss, the x_dim and x_num_col_dims need change
+          reshape_after_fc_dim.nbDims = 4;
+        } else {
+          reshape_after_fc_dim.nbDims = x_num_col_dims + 1;
+        }
         for (int i = 0; i < reshape_after_fc_dim.nbDims; i++) {
           reshape_after_fc_dim.d[i] = 0;
         }
@@ -181,11 +188,15 @@ class FcOpConverter : public OpConverter {
                                 static_cast<void*>(bias_data),
                                 static_cast<size_t>(bias_num)};
 
-    auto x_dim = X->getDimensions();
     // Running the TRT Static Shape mode: x_num_col_dims-1
     if (!engine_->with_dynamic_shape()) {
       x_num_col_dims--;
     }
+    // If use tensorrt'oss, the x_dim and x_num_col_dims need change
+    if (engine_->use_oss() && engine_->with_ernie() && x_dim.nbDims == 4 &&
+        x_dim.d[2] == 1 && x_dim.d[3] == 1 && x_num_col_dims == 2) {
+      x_num_col_dims = 1;
+    }
     PADDLE_ENFORCE_GT(
         x_dim.nbDims, x_num_col_dims,
         platform::errors::InvalidArgument(