[mlgo] Retire LLVM_HAVE_TF_API

[kazu]

Summary

I've eliminated all uses of LLVM_HAVE_TF_API except a couple of them
being removed in llvm/lib/CodeGen/CMakeLists.txt. This patch removes
remaining definitions and uses of LLVM_HAVE_TF_API.

llvm/CMakeLists.txt

 endif()
 
 # For up-to-date instructions for installing the TFLite dependency, refer to
 # the bot setup script: https://github.com/google/ml-compiler-opt/blob/main/buildbot/buildbot_init.sh
 set(LLVM_HAVE_TFLITE "" CACHE BOOL "Use tflite")
 if (LLVM_HAVE_TFLITE)
   find_package(protobuf REQUIRED)
   find_package(tensorflow-lite REQUIRED)
-  set(LLVM_HAVE_TF_API "ON" CACHE BOOL "Full Tensorflow API available")
   set(LLVM_PROTOBUF_OUT_DIR ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/protobuf_gen)
   include_directories(${LLVM_PROTOBUF_OUT_DIR})
 endif()
 
 # For up-to-date instructions for installing the Tensorflow dependency, refer to
 # the bot setup script: https://github.com/google/ml-compiler-opt/blob/main/buildbot/buildbot_init.sh
 # Specifically, assuming python3 is installed:
 # python3 -m pip install --upgrade pip && python3 -m pip install --user tf_nightly==2.3.0.dev20200528

llvm/include/llvm/Config/llvm-config.h.cmake

 #cmakedefine LLVM_ENABLE_HTTPLIB ${LLVM_ENABLE_HTTPLIB}
 
 /* Define if zlib compression is available */
 #cmakedefine01 LLVM_ENABLE_ZLIB
 
 /* Define if zstd compression is available */
 #cmakedefine01 LLVM_ENABLE_ZSTD
 
-/* Define if LLVM was built with a dependency to the libtensorflow dynamic library */
-#cmakedefine LLVM_HAVE_TF_API
-
 /* Define if LLVM is using tflite instead of libtensorflow */
 #cmakedefine LLVM_HAVE_TFLITE
 
 /* Define to 1 if you have the <sysexits.h> header file. */
 #cmakedefine HAVE_SYSEXITS_H ${HAVE_SYSEXITS_H}
 
 /* Define if the xar_open() function is supported on this platform. */
 #cmakedefine LLVM_HAVE_LIBXAR ${LLVM_HAVE_LIBXAR}

llvm/lib/CodeGen/CMakeLists.txt

-if (DEFINED LLVM_HAVE_TF_AOT OR DEFINED LLVM_HAVE_TF_API)
+if (DEFINED LLVM_HAVE_TF_AOT OR LLVM_HAVE_TFLITE)
   include(TensorFlowCompile)
   set(LLVM_RAEVICT_MODEL_PATH_DEFAULT "models/regalloc-eviction")
 
   set(LLVM_RAEVICT_MODEL_CURRENT_URL "<UNSPECIFIED>" CACHE STRING "URL to download the LLVM register allocator eviction model")
 
   if (DEFINED LLVM_HAVE_TF_AOT)
     tf_find_and_compile(
       ${LLVM_RAEVICT_MODEL_PATH}
       ${LLVM_RAEVICT_MODEL_CURRENT_URL}
       ${LLVM_RAEVICT_MODEL_PATH_DEFAULT}
       "../Analysis/models/gen-regalloc-eviction-test-model.py"
       serve
       action
       RegallocEvictModel
       llvm::RegallocEvictModel
     )
   endif()
 
-  if (DEFINED LLVM_HAVE_TF_API)
+  if (LLVM_HAVE_TFLITE)
     list(APPEND MLLinkDeps ${tensorflow_c_api} ${tensorflow_fx})
   endif()
 endif()
 
 add_llvm_component_library(LLVMCodeGen
   AggressiveAntiDepBreaker.cpp
   AllocationOrder.cpp
   Analysis.cpp

llvm/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn

values = [
     "LLVM_BUILD_SHARED_LIBS=",
     "LLVM_DEFAULT_TARGET_TRIPLE=$llvm_target_triple",
     "LLVM_ENABLE_DUMP=",
     "LLVM_ENABLE_HTTPLIB=",
     "LLVM_ENABLE_ZSTD=",
     "LLVM_FORCE_ENABLE_STATS=",
     "LLVM_FORCE_USE_OLD_TOOLCHAIN=",
     "LLVM_HAS_ATOMICS=1",
-    "LLVM_HAVE_TF_API=",
     "LLVM_HAVE_TFLITE=",
     "LLVM_HOST_TRIPLE=$llvm_current_triple",
     "LLVM_NATIVE_ARCH=$native_target",
     "LLVM_UNREACHABLE_OPTIMIZE=1",
     "LLVM_USE_INTEL_JITEVENTS=",
     "LLVM_USE_OPROFILE=",
     "LLVM_USE_PERF=",
     "LLVM_VERSION_MAJOR=$llvm_version_major",

llvm/utils/gn/secondary/llvm/test/BUILD.gn

extra_values = [
     "LLVM_BINDINGS=",
     "LLVM_BYE_LINK_INTO_TOOLS=0",
 
     "HAVE_OCAMLOPT=0",
     "OCAMLFIND=OCAMLFIND-NOTFOUND",
     "OCAMLFLAGS=",
     "LLVM_BUILD_EXAMPLES=0",
     "LLVM_HAVE_TF_AOT=0",
-    "LLVM_HAVE_TF_API=0",
     "LLVM_INLINER_MODEL_AUTOGENERATED=0",
     "LLVM_RAEVICT_MODEL_AUTOGENERATED=0",
     "PTXAS_EXECUTABLE=",
   ]
 
   if (host_cpu == "x64") {
     extra_values += [ "HOST_ARCH=x86_64" ]
   } else if (host_cpu == "arm64") {

utils/bazel/llvm-project-overlay/llvm/include/llvm/Config/llvm-config.h

 /* #undef LLVM_WITH_Z3 */
 
 /* Define if we have curl and want to use it */
 /* #undef LLVM_ENABLE_CURL */
 
 /* Define if we have cpp-httplib and want to use it */
 /* #undef LLVM_ENABLE_HTTPLIB */
 
-/* Define if LLVM was built with a dependency to the libtensorflow dynamic library */
-/* #undef LLVM_HAVE_TF_API */
-
 /* Define if LLVM was built with a dependency to the tensorflow compiler */
 /* #undef LLVM_HAVE_TF_AOT */
 
 /* Define to 1 if you have the <sysexits.h> header file. */
 /* HAVE_SYSEXITS_H defined in Bazel */
 
 /* Define if the xar_open() function is supported this platform. */
 /* #undef HAVE_LIBXAR */

utils/bazel/llvm_configs/llvm-config.h.cmake

 #cmakedefine LLVM_ENABLE_HTTPLIB ${LLVM_ENABLE_HTTPLIB}
 
 /* Define if zlib compression is available */
 #cmakedefine01 LLVM_ENABLE_ZLIB
 
 /* Define if zstd compression is available */
 #cmakedefine01 LLVM_ENABLE_ZSTD
 
-/* Define if LLVM was built with a dependency to the libtensorflow dynamic library */
-#cmakedefine LLVM_HAVE_TF_API
-
-/* Define if LLVM is using tflite instead of libtensorflow */
+/* Define if LLVM is using tflite */
 #cmakedefine LLVM_HAVE_TFLITE
 
 /* Define to 1 if you have the <sysexits.h> header file. */
 #cmakedefine HAVE_SYSEXITS_H ${HAVE_SYSEXITS_H}
 
 /* Define if the xar_open() function is supported on this platform. */
 #cmakedefine LLVM_HAVE_LIBXAR ${LLVM_HAVE_LIBXAR}