Fix interaction of static plugins with -DLLVM_LINK_LLVM_DYLIB=ON.

We should link static plugins into libLLVM.so; they shouldn't depend on
libLLVM.so.

Fixes https://bugs.llvm.org/show_bug.cgi?id=45571

Differential Revision: https://reviews.llvm.org/D78332

Author: efriedma-quic

llvm/cmake/modules/AddLLVM.cmake

@@ -883,7 +883,7 @@ function(add_llvm_pass_plugin name)
     list(REMOVE_ITEM ARG_UNPARSED_ARGUMENTS BUILDTREE_ONLY)
     # process_llvm_pass_plugins takes care of the actual linking, just create an
     # object library as of now
-    add_llvm_library(${name} OBJECT ${ARG_UNPARSED_ARGUMENTS})
+    add_llvm_component_library(${name} OBJECT ${ARG_UNPARSED_ARGUMENTS})
     target_compile_definitions(${name} PRIVATE LLVM_${name_upper}_LINK_INTO_TOOLS)
     set_property(TARGET ${name} APPEND PROPERTY COMPILE_DEFINITIONS LLVM_LINK_INTO_TOOLS)
     if (TARGET intrinsics_gen)

polly/lib/CMakeLists.txt

@@ -107,7 +107,7 @@ if (GPU_CODEGEN)
   llvm_map_components_to_libnames(nvptx_libs NVPTX)
 endif ()
 
-if (LLVM_LINK_LLVM_DYLIB)
+if (LLVM_LINK_LLVM_DYLIB AND NOT LLVM_POLLY_LINK_INTO_TOOLS)
   # The shlib/dylib contains all the LLVM components
   # (including NVPTX is enabled) already. Adding them to target_link_libraries
   # would cause them being twice in the address space