[cmake] Use source-groups in Polly.

Configure CMake to setup source-groups for Polly. Source groups
describe how source files should be organized in IDEs. By default, all
headers are dumped into one folder under PollyCore and all source files
into another. On disk, these files are organized into folders, but this
isn't reflected in the IDE. This change uses CMake source groups to have
the IDE reflect the on disk layout. This will make it easier to visualize
the project structure for users of Visual Studio and XCode

Patch by Christopher Tetreault <ctetreau@quicinc.com>

Reviewed By: Meinersbur, grosser

Differential Revision: https://reviews.llvm.org/D72117

1 files changed, 11 insertions, 0 deletions

diff --git a/polly/lib/CMakeLists.txt b/polly/lib/CMakeLists.txt
index e76d6039ad5..9e8cd1906d6 100644
--- a/polly/lib/CMakeLists.txt
+++ b/polly/lib/CMakeLists.txt
@@ -73,6 +73,17 @@ add_llvm_pass_plugin(Polly
 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
+  # will be a source and include folder. In the source folder will be all the
+  # source files in a flat list, and in the include folder will be all the
+  # headers in a flat list. Sets the CMake source_group for each folder such
+  # the organization of the sources and headers in the IDE matches how it is
+  # laid out on disk
+  setup_polly_source_groups(${CMAKE_CURRENT_LIST_DIR}
+    ${CMAKE_CURRENT_LIST_DIR}/../include/polly)
+endif()
+
 # Create the library that can be linked into LLVM's tools and Polly's unittests.
 # It depends on all library it needs, such that with
 # LLVM_POLLY_LINK_INTO_TOOLS=ON, its dependencies like PollyISL are linked as