[amdgpu] Part1 add codegen

cmake/TaichiCore.cmake

@@ -237,6 +237,9 @@ if(TI_WITH_LLVM)
     if (TI_WITH_AMDGPU)
         llvm_map_components_to_libnames(llvm_amdgpu_libs AMDGPU)
         add_subdirectory(taichi/rhi/amdgpu)
+        add_subdirectory(taichi/codegen/amdgpu)
+
+        target_link_libraries(${CORE_LIBRARY_NAME} PRIVATE amdgpu_codegen)
         target_link_libraries(${CORE_LIBRARY_NAME} PRIVATE amdgpu_rhi)
     endif()
 

taichi/codegen/amdgpu/CMakeLists.txt

@@ -0,0 +1,17 @@
+# ./taichi/codegen/amdgpu/CMakeLists.txt
+
+add_library(amdgpu_codegen)
+target_sources(amdgpu_codegen
+  PRIVATE
+    codegen_amdgpu.cpp
+  )
+
+target_include_directories(amdgpu_codegen
+  PRIVATE
+    ${PROJECT_SOURCE_DIR}
+    ${PROJECT_SOURCE_DIR}/external/eigen
+    ${LLVM_INCLUDE_DIRS}
+  )
+
+target_link_libraries(amdgpu_codegen PRIVATE taichi_util)
+# target_link_libraries(amdgpu_codegen PRIVATE amdgpu_runtime)