Don't concatenate empty tensors
Don't concatenate empty tensors

PiperOrigin-RevId: 310468853
Change-Id: I30c5006d172c49d1203e92eda7c040f80ca4a1ed

Intel-tensorflow/tensorflow,frreiss/tensorflow-fred,karllessard/tensorflow,freedomtan/tensorflow,petewarden/tensorflow,Intel-Corporation/tensorflow,petewarden/tensorflow,frreiss/tensorflow-fred,freedomtan/tensorflow,annarev/tensorflow,sarvex/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,cxxgtxy/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow-pywrap_tf_optimizer,Intel-Corporation/tensorflow,paolodedios/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow,aam-at/tensorflow,gautam1858/tensorflow,davidzchen/tensorflow,annarev/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,frreiss/tensorflow-fred,yongtang/tensorflow,karllessard/tensorflow,tensorflow/tensorflow,davidzchen/tensorflow,aam-at/tensorflow,Intel-tensorflow/tensorflow,karllessard/tensorflow,frreiss/tensorflow-fred,Intel-tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow-experimental_link_static_libraries_once,sarvex/tensorflow,aldian/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow,frreiss/tensorflow-fred,petewarden/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow-pywrap_saved_model,freedomtan/tensorflow,karllessard/tensorflow,paolodedios/tensorflow,sarvex/tensorflow,petewarden/tensorflow,cxxgtxy/tensorflow,aam-at/tensorflow,karllessard/tensorflow,yongtang/tensorflow,tensorflow/tensorflow,yongtang/tensorflow,yongtang/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,petewarden/tensorflow,freedomtan/tensorflow,aam-at/tensorflow,aam-at/tensorflow,aldian/tensorflow,paolodedios/tensorflow,karllessard/tensorflow,sarvex/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,cxxgtxy/tensorflow,sarvex/tensorflow,paolodedios/tensorflow,tensorflow/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow,gautam1858/tensorflow,yongtang/tensorflow,aldian/tensorflow,davidzchen/tensorflow,yongtang/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,annarev/tensorflow,tensorflow/tensorflow,Intel-tensorflow/tensorflow,freedomtan/tensorflow,cxxgtxy/tensorflow,sarvex/tensorflow,petewarden/tensorflow,annarev/tensorflow,paolodedios/tensorflow,paolodedios/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow-pywrap_saved_model,gautam1858/tensorflow,Intel-Corporation/tensorflow,yongtang/tensorflow,aldian/tensorflow,aldian/tensorflow,Intel-tensorflow/tensorflow,aam-at/tensorflow,freedomtan/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,annarev/tensorflow,karllessard/tensorflow,paolodedios/tensorflow,tensorflow/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,paolodedios/tensorflow,yongtang/tensorflow,Intel-Corporation/tensorflow,annarev/tensorflow,Intel-tensorflow/tensorflow,freedomtan/tensorflow,tensorflow/tensorflow-pywrap_saved_model,aam-at/tensorflow,frreiss/tensorflow-fred,cxxgtxy/tensorflow,frreiss/tensorflow-fred,gautam1858/tensorflow,freedomtan/tensorflow,gautam1858/tensorflow,yongtang/tensorflow,aam-at/tensorflow,gautam1858/tensorflow,davidzchen/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,yongtang/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-pywrap_tf_optimizer,gautam1858/tensorflow,tensorflow/tensorflow,aldian/tensorflow,sarvex/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-experimental_link_static_libraries_once,freedomtan/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,Intel-Corporation/tensorflow,annarev/tensorflow,annarev/tensorflow,petewarden/tensorflow,gautam1858/tensorflow,aam-at/tensorflow,yongtang/tensorflow,aldian/tensorflow,cxxgtxy/tensorflow,tensorflow/tensorflow-pywrap_saved_model,karllessard/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,davidzchen/tensorflow,davidzchen/tensorflow,freedomtan/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-pywrap_tf_optimizer,paolodedios/tensorflow,annarev/tensorflow,aldian/tensorflow,aam-at/tensorflow,frreiss/tensorflow-fred,freedomtan/tensorflow,gautam1858/tensorflow,karllessard/tensorflow,freedomtan/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow,davidzchen/tensorflow,aam-at/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-pywrap_saved_model,cxxgtxy/tensorflow,annarev/tensorflow,davidzchen/tensorflow,frreiss/tensorflow-fred,Intel-tensorflow/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow-pywrap_saved_model,petewarden/tensorflow,annarev/tensorflow,davidzchen/tensorflow,frreiss/tensorflow-fred,frreiss/tensorflow-fred,frreiss/tensorflow-fred,Intel-Corporation/tensorflow,aam-at/tensorflow,petewarden/tensorflow,Intel-Corporation/tensorflow,sarvex/tensorflow,paolodedios/tensorflow,gautam1858/tensorflow,petewarden/tensorflow,cxxgtxy/tensorflow,davidzchen/tensorflow,paolodedios/tensorflow,Intel-Corporation/tensorflow,Intel-tensorflow/tensorflow