get LLVM_MAIN_REVISION macro from compiler header (#3469)

Author: illsilin

CMakeLists.txt

@@ -38,6 +38,22 @@ set(version 1.2.0)
 project(composable_kernel VERSION ${version} LANGUAGES CXX HIP)
 include(CTest)
 
+# Set the default value of LLVM_MAIN_REVISION to the equivalent of ROCm7.1.1 release
+set(LLVM_MAIN_REVISION 524190)
+if (CMAKE_CXX_COMPILER MATCHES "/opt/rocm")
+    message("compiler in default /opt/rocm/ path")
+    file(READ "/opt/rocm/llvm/include/llvm/Config/llvm-config.h" HEADER_CONTENT)
+    string(REGEX MATCH "#define LLVM_MAIN_REVISION[ \t]+([0-9]+)" MATCH_RESULT "${HEADER_CONTENT}")
+    set(LLVM_MAIN_REVISION ${CMAKE_MATCH_1})
+elseif (CMAKE_CXX_COMPILER MATCHES "/llvm-project/build")
+    message("compiler in custom /llvm-project/build/ path")
+    file(READ "/llvm-project/build/include/llvm/Config/llvm-config.h" HEADER_CONTENT)
+    string(REGEX MATCH "#define LLVM_MAIN_REVISION[ \t]+([0-9]+)" MATCH_RESULT "${HEADER_CONTENT}")
+    set(LLVM_MAIN_REVISION ${CMAKE_MATCH_1})
+endif()
+message("From CMake: LLVM_MAIN_REVISION=${LLVM_MAIN_REVISION}")
+add_definitions(-DLLVM_MAIN_REVISION=${LLVM_MAIN_REVISION})
+
 option(ENABLE_CLANG_CPP_CHECKS "Enables clang tidy, cppcheck" ON)
 option(MIOPEN_REQ_LIBS_ONLY "Build only the MIOpen required libraries" OFF)
 option(CK_EXPERIMENTAL_BUILDER "Enable experimental builder" OFF)

include/ck_tile/core/config.hpp

@@ -39,7 +39,7 @@
 #define CK_TILE_DEVICE inline __device__
 #define CK_TILE_HOST_DEVICE inline __host__ __device__
 #define CK_TILE_DEVICE_EXTERN __device__
-#if __clang_major__ < 22
+#if LLVM_MAIN_REVISION < 554785
 #define CK_TILE_HOST_DEVICE_EXTERN __host__ __device__
 #else
 #define CK_TILE_HOST_DEVICE_EXTERN