[llvm][CMake] Move `split-file` from tools to utils

[zero9178]

Summary

It fittingly already making use of add_llvm_utility during target creation and is usually only used in conjunction with other (test) related utilities such as FileCheck and not, which are already in utils.

[MaskRay]

split-file seems to fit utils/ well. It is small and self-contained. utils mostly just uses LLVMSupport.

yaml2obj and obj2yaml, on the other hand, use the higher level LLVMObjectYAML/DebugInfoDWARF/etc. And they are now a bit similar to other binary utilities like llvm-readelf.

[thakis]

In D131713#3717347, @MaskRay wrote:

split-file seems to fit utils/ well. It is small and self-contained. utils mostly just uses LLVMSupport.

yaml2obj and obj2yaml, on the other hand, use the higher level LLVMObjectYAML/DebugInfoDWARF/etc. And they are now a bit similar to other binary utilities like llvm-readelf.

+1

[jhenderson]

I tentatively agree with @MaskRay on this. Certainly, split-file is really intended for use as a test helper only. yaml2obj and obj2yaml though could have wider usage potentially (I myself have occasionally used one or the other to experiment with some things). As such, I think split-file to utils only would be best.

That all being said, I've not looked at the CMake. What's the difference between add_llvm_utility and whatever is used for the other tools like llvm-objdump etc?

[zero9178]

Only move 'split-file'

[zero9178]

In D131713#3718371, @jhenderson wrote:

I tentatively agree with @MaskRay on this. Certainly, split-file is really intended for use as a test helper only. yaml2obj and obj2yaml though could have wider usage potentially (I myself have occasionally used one or the other to experiment with some things). As such, I think split-file to utils only would be best.

That all being said, I've not looked at the CMake. What's the difference between add_llvm_utility and whatever is used for the other tools like llvm-objdump etc?

See https://reviews.llvm.org/D130977, but the gist of it is essentially what CMake flags are used to control whether a target is built as well as installed.

[thakis]

Thanks!

llvm/CMakeLists.txt

 
 if( LLVM_INCLUDE_UTILS )
   add_subdirectory(utils/FileCheck)
   add_subdirectory(utils/PerfectShuffle)
   add_subdirectory(utils/count)
   add_subdirectory(utils/not)
   add_subdirectory(utils/UnicodeData)
   add_subdirectory(utils/yaml-bench)
+  add_subdirectory(utils/split-file)
 else()
   if ( LLVM_INCLUDE_TESTS )
     message(FATAL_ERROR "Including tests when not building utils will not work.
     Either set LLVM_INCLUDE_UTILS to On, or set LLVM_INCLUDE_TESTS to Off.")
   endif()
 endif()
 
 # Use LLVM_ADD_NATIVE_VISUALIZERS_TO_SOLUTION instead of LLVM_INCLUDE_UTILS because it is not really a util