enforce only used

paddle/fluid/operators/fusion_lstm_op.cc

@@ -38,16 +38,6 @@ void FusionLSTMOp::InferShape(framework::InferShapeContext* ctx) const {
                  "Output(Hidden) of LSTM should not be null.");
   PADDLE_ENFORCE(ctx->HasOutput("Cell"),
                  "Output(Cell) of LSTM should not be null.");
-  PADDLE_ENFORCE(ctx->HasOutput("BatchedInput"),
-                 "Output(BatchedInput) of LSTM should not be null.");
-  PADDLE_ENFORCE(ctx->HasOutput("BatchedHidden"),
-                 "Output(BatchedHidden) of LSTM should not be null.");
-  PADDLE_ENFORCE(ctx->HasOutput("BatchedCell"),
-                 "Output(BatchedCell) of LSTM should not be null.");
-  PADDLE_ENFORCE(ctx->HasOutput("ReorderedH0"),
-                 "Output(ReorderedH0) of LSTM should not be null.");
-  PADDLE_ENFORCE(ctx->HasOutput("ReorderedC0"),
-                 "Output(ReorderedC0) of LSTM should not be null.");
 
   auto x_dims = ctx->GetInputDim("X");
   PADDLE_ENFORCE_EQ(x_dims.size(), 2, "Input(X)'s rank must be 2.");
@@ -99,17 +89,26 @@ void FusionLSTMOp::InferShape(framework::InferShapeContext* ctx) const {
   framework::DDim out_dims({x_dims[0], frame_size});
   ctx->SetOutputDim("Hidden", out_dims);
   ctx->SetOutputDim("Cell", out_dims);
-  ctx->SetOutputDim("BatchedInput", {x_dims[0], wx_dims[1]});
-  ctx->SetOutputDim("BatchedHidden", out_dims);
-  ctx->SetOutputDim("BatchedCell", out_dims);
   ctx->ShareLoD("X", "Hidden");
   ctx->ShareLoD("X", "Cell");
-
   int xx_width;
   if (ctx->Attrs().Get<bool>("use_seq")) {
     xx_width = wx_dims[1];
   } else {
     xx_width = x_dims[1] > wx_dims[1] ? wx_dims[1] : x_dims[1];
+    PADDLE_ENFORCE(ctx->HasOutput("BatchedInput"),
+                   "Output(BatchedInput) of LSTM should not be null.");
+    PADDLE_ENFORCE(ctx->HasOutput("BatchedHidden"),
+                   "Output(BatchedHidden) of LSTM should not be null.");
+    PADDLE_ENFORCE(ctx->HasOutput("BatchedCell"),
+                   "Output(BatchedCell) of LSTM should not be null.");
+    PADDLE_ENFORCE(ctx->HasOutput("ReorderedH0"),
+                   "Output(ReorderedH0) of LSTM should not be null.");
+    PADDLE_ENFORCE(ctx->HasOutput("ReorderedC0"),
+                   "Output(ReorderedC0) of LSTM should not be null.");
+    ctx->SetOutputDim("BatchedInput", {x_dims[0], wx_dims[1]});
+    ctx->SetOutputDim("BatchedHidden", out_dims);
+    ctx->SetOutputDim("BatchedCell", out_dims);
   }
   ctx->SetOutputDim("XX", {x_dims[0], xx_width});
   ctx->ShareLoD("X", "XX");