[polly] Revise IDE folder structure (#89752)

Update the folder titles for targets in the monorepository that have not
seen taken care of for some time. These are the folders that targets are
organized in Visual Studio and XCode
(`set_property(TARGET <target> PROPERTY FOLDER "<title>")`)
when using the respective CMake's IDE generator.

 * Ensure that every target is in a folder
 * Use a folder hierarchy with each LLVM subproject as a top-level folder
 * Use consistent folder names between subprojects
 * When using target-creating functions from AddLLVM.cmake, automatically
deduce the folder. This reduces the number of
`set_property`/`set_target_property`, but are still necessary when
`add_custom_target`, `add_executable`, `add_library`, etc. are used. A
LLVM_SUBPROJECT_TITLE definition is used for that in each subproject's
root CMakeLists.txt.

7 files changed, 12 insertions, 17 deletions

diff --git a/polly/CMakeLists.txt b/polly/CMakeLists.txt
index 5d0f2cd..b4cfc77 100644
--- a/polly/CMakeLists.txt
+++ b/polly/CMakeLists.txt
@@ -4,6 +4,7 @@ if (NOT DEFINED LLVM_MAIN_SRC_DIR)
   cmake_minimum_required(VERSION 3.20.0)
   set(POLLY_STANDALONE_BUILD TRUE)
 endif()
+set(LLVM_SUBPROJECT_TITLE "Polly")
 
 # Must go below project(..)
 include(GNUInstallDirs)
@@ -157,8 +158,7 @@ foreach (file IN LISTS files)
 endforeach ()
 
 add_custom_target(polly-check-format DEPENDS ${check_format_depends})
-set_target_properties(polly-check-format PROPERTIES FOLDER "Polly")
+set_target_properties(polly-check-format PROPERTIES FOLDER "Polly/Metatargets")
 
 add_custom_target(polly-update-format DEPENDS ${update_format_depends})
-set_target_properties(polly-update-format PROPERTIES FOLDER "Polly")
-
+set_target_properties(polly-update-format PROPERTIES FOLDER "Polly/Metatargets")
diff --git a/polly/cmake/polly_macros.cmake b/polly/cmake/polly_macros.cmake
index df541ee..a791be4 100644
--- a/polly/cmake/polly_macros.cmake
+++ b/polly/cmake/polly_macros.cmake
@@ -21,7 +21,7 @@ macro(add_polly_library name)
     set(libkind)
   endif()
   add_library( ${name} ${libkind} ${srcs} )
-  set_target_properties(${name} PROPERTIES FOLDER "Polly")
+  set_target_properties(${name} PROPERTIES FOLDER "Polly/Libraries")
 
   if( LLVM_COMMON_DEPENDS )
     add_dependencies( ${name} ${LLVM_COMMON_DEPENDS} )
@@ -64,7 +64,7 @@ macro(add_polly_loadable_module name)
   endif()
   set(MODULE TRUE)
   add_polly_library(${name} ${srcs})
-  set_target_properties(${name} PROPERTIES FOLDER "Polly")
+  set_target_properties(${name} PROPERTIES FOLDER "Polly/Loadable Modules")
   if (GLOBAL_NOT_MODULE)
     unset (MODULE)
   endif()
diff --git a/polly/docs/CMakeLists.txt b/polly/docs/CMakeLists.txt
index a1ef5ce..2bd16e5 100644
--- a/polly/docs/CMakeLists.txt
+++ b/polly/docs/CMakeLists.txt
@@ -77,6 +77,7 @@ if (LLVM_ENABLE_DOXYGEN)
     COMMAND ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/doxygen.cfg
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
     COMMENT "Generating polly doxygen documentation." VERBATIM)
+  set_target_properties(doxygen-polly PROPERTIES FOLDER "Polly/Docs")
 
   if (LLVM_BUILD_DOCS)
     add_dependencies(doxygen doxygen-polly)
diff --git a/polly/lib/CMakeLists.txt b/polly/lib/CMakeLists.txt
index 4557878..d91f4ec 100644
--- a/polly/lib/CMakeLists.txt
+++ b/polly/lib/CMakeLists.txt
@@ -92,8 +92,6 @@ add_llvm_pass_plugin(Polly
   LINK_COMPONENTS
   ${POLLY_COMPONENTS}
   )
-set_target_properties(obj.Polly PROPERTIES FOLDER "Polly")
-set_target_properties(Polly PROPERTIES FOLDER "Polly")
 
 if (MSVC_IDE OR XCODE)
   # Configure source groups for Polly source files. By default, in the IDE there
@@ -120,7 +118,7 @@ if (WIN32 OR CYGWIN OR NOT LLVM_ENABLE_PIC)
   # Add dummy target, either because loadable modules are not supported
   # as on Windows or because PIC code has been disabled
   add_custom_target(LLVMPolly)
-  set_target_properties(LLVMPolly PROPERTIES FOLDER "Polly")
+  set_target_properties(LLVMPolly PROPERTIES FOLDER "Polly/Loadable Modules")
 else ()
   add_polly_loadable_module(LLVMPolly
     Plugin/Polly.cpp
diff --git a/polly/lib/External/CMakeLists.txt b/polly/lib/External/CMakeLists.txt
index 1869410..5dd69b7 100644
--- a/polly/lib/External/CMakeLists.txt
+++ b/polly/lib/External/CMakeLists.txt
@@ -302,7 +302,7 @@ if (POLLY_BUNDLED_ISL)
   add_executable(polly-isl-test
     isl/isl_test.c
     )
-  set_target_properties(polly-isl-test PROPERTIES FOLDER "Polly")
+  set_target_properties(polly-isl-test PROPERTIES FOLDER "Polly/Tests")
 
   target_link_libraries(polly-isl-test PRIVATE
     PollyISL
diff --git a/polly/test/CMakeLists.txt b/polly/test/CMakeLists.txt
index 81cee34..4548f01 100644
--- a/polly/test/CMakeLists.txt
+++ b/polly/test/CMakeLists.txt
@@ -1,7 +1,7 @@
 set(LLVM_SHLIBEXT "${CMAKE_SHARED_MODULE_SUFFIX}")
 
 add_custom_target(check-polly)
-set_target_properties(check-polly PROPERTIES FOLDER "Polly")
+set_target_properties(check-polly PROPERTIES FOLDER "Polly/Meta")
 
 if(NOT LLVM_MAIN_SRC_DIR)
   find_program(LLVM_OPT NAMES opt HINTS ${LLVM_TOOLS_BINARY_DIR})
@@ -64,7 +64,6 @@ add_lit_testsuite(check-polly-tests "Running polly regression tests"
   polly_unit_site_config=${CMAKE_CURRENT_BINARY_DIR}/Unit/lit.site.cfg
   DEPENDS ${POLLY_TEST_DEPS}
   )
-set_target_properties(check-polly-tests PROPERTIES FOLDER "Polly")
 add_dependencies(check-polly check-polly-tests)
 
 configure_lit_site_cfg(
@@ -80,7 +79,6 @@ if (POLLY_GTEST_AVAIL)
     EXCLUDE_FROM_CHECK_ALL
     DEPENDS PollyUnitTests
     )
-  set_target_properties(check-polly-unittests PROPERTIES FOLDER "Polly")
 endif ()
 
 configure_file(
@@ -94,7 +92,6 @@ if (POLLY_BUNDLED_ISL)
     EXCLUDE_FROM_CHECK_ALL
     DEPENDS polly-isl-test
     )
-  set_target_properties(check-polly-isl PROPERTIES FOLDER "Polly")
 endif (POLLY_BUNDLED_ISL)
 
 # Run polly-check-format as part of polly-check only if we are compiling with
@@ -114,5 +111,5 @@ configure_file(
 
 # Add a legacy target spelling: polly-test
 add_custom_target(polly-test)
-set_target_properties(polly-test PROPERTIES FOLDER "Polly")
+set_target_properties(polly-test PROPERTIES FOLDER "Polly/Metatargets")
 add_dependencies(polly-test check-polly)
diff --git a/polly/unittests/CMakeLists.txt b/polly/unittests/CMakeLists.txt
index 94b7544..093a214 100644
--- a/polly/unittests/CMakeLists.txt
+++ b/polly/unittests/CMakeLists.txt
@@ -1,5 +1,5 @@
 add_custom_target(PollyUnitTests)
-set_target_properties(PollyUnitTests PROPERTIES FOLDER "Polly")
+set_target_properties(PollyUnitTests PROPERTIES FOLDER "Polly/Tests")
 
 # add_polly_unittest(test_dirname file1.cpp file2.cpp)
 #
@@ -13,9 +13,8 @@ function(add_polly_unittest test_name)
 
     target_link_libraries(${test_name} PRIVATE gtest_main gtest)
     add_dependencies(PollyUnitTests ${test_name})
-
-    set_property(TARGET ${test_name} PROPERTY FOLDER "Polly")
   endif()
+  set_property(TARGET ${test_name} PROPERTY FOLDER "Polly/Tests/Unit")
 
   if(LLVM_LINK_LLVM_DYLIB AND LLVM_POLLY_LINK_INTO_TOOLS)
     # In this case Polly is already present in libLLVM,