Compressed diff from
```
git show d21664cce1db8debe2528f36b1fbd2b8af9c9401 87dac7da68ea1e0adac78c59ef1891dcf9632b67 3a0f6e699bb6d96dc62dce6faef20ac26cf103fd
```
with the purpose of avoiding linker errors arising in the polly-flavoured clang.

diff --git a/clang/CMakeLists.txt b/clang/CMakeLists.txt
index 781c3eb7f2f..dc1413f4b59 100644
--- clang/CMakeLists.txt
+++ clang/CMakeLists.txt
@@ -864,6 +864,7 @@ add_subdirectory(utils/hmaptool)
 
 if(CLANG_BUILT_STANDALONE)
   llvm_distribution_add_targets()
+  process_llvm_pass_plugins()
 endif()
 
 configure_file(