Skip compile infer shape in box_coder_op

test=develop

paddle/fluid/operators/detection/box_coder_op.cc

@@ -60,14 +60,15 @@ class BoxCoderOp : public framework::OperatorWithKernel {
     } else if (code_type == BoxCodeType::kDecodeCenterSize) {
       PADDLE_ENFORCE_EQ(target_box_dims.size(), 3,
                         "The rank of Input TargetBox must be 3");
-      if (axis == 0) {
-        PADDLE_ENFORCE_EQ(target_box_dims[1], prior_box_dims[0]);
-      } else if (axis == 1) {
-        PADDLE_ENFORCE_EQ(target_box_dims[0], prior_box_dims[0]);
-      } else {
-        PADDLE_THROW("axis must be 0 or 1.");
+      PADDLE_ENFORCE(axis == 0 || axis == 1, "axis must be 0 or 1");
+      if (ctx->IsRuntime()) {
+        if (axis == 0) {
+          PADDLE_ENFORCE_EQ(target_box_dims[1], prior_box_dims[0]);
+        } else if (axis == 1) {
+          PADDLE_ENFORCE_EQ(target_box_dims[0], prior_box_dims[0]);
+        }
+        PADDLE_ENFORCE_EQ(target_box_dims[2], prior_box_dims[1]);
       }
-      PADDLE_ENFORCE_EQ(target_box_dims[2], prior_box_dims[1]);
       ctx->ShareDim("TargetBox", /*->*/ "OutputBox");
     }