[CMake] Support separate installation of InstrProfData.inc

[phosek]

Summary

This header fragment is useful on its own for any consumer that wants
to use custom instruction profile runtime with the LLVM instrumentation.
The concrete use case is in Fuchsia's kernel where we want to use
instruction profile instrumentation, but we cannot use the compiler-rt
runtime because it's not designed for use in the kernel environment.
This change allows installing this header as a separate distribution
component without having to install all LLVM headers.

[smeenai]

llvm/include/llvm/ProfileData/CMakeLists.txt

7

You can use add_llvm_install_targets right?

[smeenai]

LGTM with the comment; the use case makes sense to me.

[phosek]

@davidxl @vsk is this OK with you? I'd like to go ahead and land this change.

[phosek]

llvm/include/llvm/ProfileData/CMakeLists.txt

7

I've changed the approach and moved this to compiler-rt which I think is a more appropriate place since this is related to the runtime.

[vsk]

Lgtm. There are a few more profile headers we’d like to expose for internal clients. Thanks for laying the groundwork.

[davidxl]

lgtm

clang/cmake/caches/Fuchsia-stage2.cmake

set(LLVM_TOOLCHAIN_TOOLS
   llvm-strip
   llvm-symbolizer
   llvm-xray
   opt
   sancov
   CACHE STRING "")
 
 set(LLVM_DISTRIBUTION_COMPONENTS
+  llvm-instr-prof-data-headers
   clang
   lld
   LTO
   clang-apply-replacements
   clang-doc
   clang-format
   clang-resource-headers
   clang-include-fixer
   clang-refactor
   clang-tidy
   clangd
   builtins
   runtimes
   ${LLVM_TOOLCHAIN_TOOLS}
   CACHE STRING "")

llvm/include/llvm/CMakeLists.txt

 add_subdirectory(IR)
 add_subdirectory(Support)
+add_subdirectory(ProfileData)
 
 # If we're doing an out-of-tree build, copy a module map for generated
 # header files into the build area.
 if (NOT "${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
   configure_file(module.modulemap.build module.modulemap COPYONLY)
 endif (NOT "${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")

llvm/include/llvm/ProfileData/CMakeLists.txt

+add_custom_target(llvm-instr-prof-data-headers)
+
+install(FILES InstrProfData.inc
+  DESTINATION include/llvm/ProfileData
+  COMPONENT llvm-instr-prof-data-headers)
+
+add_custom_target(install-llvm-instr-prof-data-headers
+                  DEPENDS llvm-instr-prof-data-headers
+                  COMMAND "${CMAKE_COMMAND}"
+                          -DCMAKE_INSTALL_COMPONENT=llvm-instr-prof-data-headers
+                          -P "${CMAKE_BINARY_DIR}/cmake_install.cmake")
+add_custom_target(install-llvm-instr-prof-data-headers-stripped DEPENDS install-llvm-instr-prof-data-headers)