Generate targets for each lit suite.

[beanz]

Summary

This change makes CMake scan for lit suites and generate a target for each lit test suite. The targets follow the format check-<project>-<suite path>.

For example:
check-llvm-unit - Runs the LLVM unit tests
check-llvm-codegen-arm - Runs the ARM codeine tests

Note: These targets are not generated during multi-configuration generators (i.e. Xcode and Visual Studio) because target clutter impacts UI usability.

[filcab]

Looks good!
Will you be adding this to the other projects, btw? :-)

[beanz]

I was figuring I'd update clang and lld too, but I wasn't going to go further than that.

CMakeLists.txt

if( LLVM_INCLUDE_TESTS )
   get_property(LLVM_LIT_EXTRA_ARGS GLOBAL PROPERTY LLVM_LIT_EXTRA_ARGS)
   add_lit_target(check-all
     "Running all regression tests"
     ${LLVM_LIT_TESTSUITES}
     PARAMS ${LLVM_LIT_PARAMS}
     DEPENDS ${LLVM_LIT_DEPENDS}
     ARGS ${LLVM_LIT_EXTRA_ARGS}
     )
+
+  add_lit_testsuites(LLVM ${CMAKE_SOURCE_DIR}/test
+  PARAMS ${LLVM_LIT_PARAMS}
+  DEPENDS ${LLVM_LIT_DEPENDS}
+  ARGS ${LLVM_LIT_EXTRA_ARGS})
 endif()
 
 if (LLVM_INCLUDE_DOCS)
   add_subdirectory(docs)
 endif()
 
 add_subdirectory(cmake/modules)
 

cmake/modules/AddLLVM.cmake

function(add_lit_testsuite target comment)
   # Produce a specific suffixed check rule.
   add_lit_target(${target} ${comment}
     ${ARG_DEFAULT_ARGS}
     PARAMS ${ARG_PARAMS}
     DEPENDS ${ARG_DEPENDS}
     ARGS ${ARG_ARGS}
     )
 endfunction()
+
+function(add_lit_testsuites project directory)
+  if (NOT CMAKE_CONFIGURATION_TYPES)
+    parse_arguments(ARG "PARAMS;DEPENDS;ARGS" "" ${ARGN})
+    file(GLOB_RECURSE litCfg ${directory}/lit*.cfg)
+    foreach(f ${litCfg})
+      get_filename_component(dir ${f} DIRECTORY)
+      string(REPLACE ${directory} "" name_slash ${dir})
+      if (name_slash)
+        string(REPLACE "/" "-" name_slash ${name_slash})
+        string(REPLACE "\\" "-" name_dashes ${name_slash})
+        string(TOLOWER "${project}${name_dashes}" name_var)
+        set(lit_args ${ARG_ARGS} ${dir})
+        add_lit_target("check-${name_var}" "Running lit suite ${dir}"
+          ${dir}
+          PARAMS ${ARG_PARAMS}
+          DEPENDS ${ARG_DEPENDS}
+          ARGS ${lit_args}
+        )
+      endif()
+    endforeach()
+  endif()
+endfunction()