[NFI] Change LLVM_CONFIG setting position (#2034)

Author: whitneywhtsang

CMakeLists.txt

@@ -65,7 +65,6 @@ endif()
 
 # MLIR
 find_package(MLIR REQUIRED CONFIG PATHS ${MLIR_DIR})
-set(LLVM_CONFIG ${LLVM_LIBRARY_DIR}/../bin/llvm-config)
 
 list(APPEND CMAKE_MODULE_PATH "${MLIR_CMAKE_DIR}")
 list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_DIR}")

cmake/FindSPIRVToLLVMTranslator.cmake

@@ -21,6 +21,7 @@ if (NOT SPIRVToLLVMTranslator_FOUND)
     FetchContent_GetProperties(spirv-llvm-translator)
     if(NOT spirv-llvm-translator_POPULATED)
             FetchContent_Populate(spirv-llvm-translator)
+            set(LLVM_CONFIG ${LLVM_LIBRARY_DIR}/../bin/llvm-config)
             set(LLVM_DIR "${LLVM_LIBRARY_DIR}/cmake/llvm" CACHE PATH "Path to LLVM build dir " FORCE)
             set(LLVM_SPIRV_BUILD_EXTERNAL YES CACHE BOOL "Build SPIRV-LLVM Translator as external" FORCE)
             add_subdirectory(${spirv-llvm-translator_SOURCE_DIR} ${spirv-llvm-translator_BINARY_DIR})