[mlgo] fix build rules

[mtrofin]

Summary

This was prompted by D95727, which had the side-effect to break the
'release' mode build bot for ML-driven policies. The problem is that now
the pre-compiled object files don't get transitively carried through as
'source' anymore; that being said, the previous way of consuming them
was problematic, because it was only working for static builds; in
dynamic builds, the whole tf_xla_runtime was linked, which is
undesirable.

The alternative is to treat tf_xla_runtime as an archive, which then
leads to the desired effect.

[mtrofin]

I'll land it to unblock the ml build bots, and because the change should poise no risk elsewhere, but let me know if this could be expressed differently, and I'll follow up.

llvm/CMakeLists.txt

 if (NOT TENSORFLOW_AOT_PATH STREQUAL "")
   set(LLVM_HAVE_TF_AOT "ON" CACHE BOOL "Tensorflow AOT available")
   set(TENSORFLOW_AOT_COMPILER
     "${TENSORFLOW_AOT_PATH}/../../../../bin/saved_model_cli"
     CACHE PATH "Path to the Tensorflow AOT compiler")
   include_directories(${TENSORFLOW_AOT_PATH}/include)
   add_subdirectory(${TENSORFLOW_AOT_PATH}/xla_aot_runtime_src
     ${CMAKE_ARCHIVE_OUTPUT_DIRECTORY}/tf_runtime)
+  install(TARGETS tf_xla_runtime EXPORT LLVMExports 
+    ARCHIVE DESTINATION lib${LLVM_LIBDIR_SUFFIX} COMPONENT tf_xla_runtime)
+  set_property(GLOBAL APPEND PROPERTY LLVM_EXPORTS tf_xla_runtime)
 endif()
 
 # Keep the legacy CMake flag ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER for
 # compatibility.
 set(LLVM_ENABLE_NEW_PASS_MANAGER ${ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER})
 
 # Configure the three LLVM configuration header files.
 configure_file(

llvm/lib/Analysis/CMakeLists.txt

 if (DEFINED LLVM_HAVE_TF_AOT OR DEFINED LLVM_HAVE_TF_API)
   if (DEFINED LLVM_HAVE_TF_AOT)
     set(LLVM_INLINER_MODEL_PATH "models/inliner" 
       CACHE STRING 
       "ML-driven inliner policy location (path to saved model)")
     include(TensorFlowCompile)
     tfcompile(${LLVM_INLINER_MODEL_PATH} serve action InlinerSizeModel llvm::InlinerSizeModel)
     list(APPEND GeneratedMLSources
-      $<TARGET_OBJECTS:tf_xla_runtime_objects>
-      ${GENERATED_OBJS}
+      ${GENERATED_HEADERS}
     )
+    LIST(APPEND MLDeps tf_xla_runtime)
+    LIST(APPEND MLLinkDeps tf_xla_runtime ${GENERATED_OBJS})
   endif()
 
   if (DEFINED LLVM_HAVE_TF_API)
     LIST(APPEND MLLinkDeps ${tensorflow_c_api})
   endif()
 endif()
 
 add_llvm_component_library(LLVMAnalysis
add_llvm_component_library(LLVMAnalysis
   VFABIDemangling.cpp
   ${GeneratedMLSources}
 
   ADDITIONAL_HEADER_DIRS
   ${LLVM_MAIN_INCLUDE_DIR}/llvm/Analysis
 
   DEPENDS
   intrinsics_gen
+  ${MLDeps}
 
   LINK_LIBS
   ${MLLinkDeps}
 
   LINK_COMPONENTS
   BinaryFormat
   Core
   Object
   ProfileData
   Support
   )