Merge branch 'bauerd/dbg-opt-icx' into 'master'

Set `-O3` in `DEBUGOPTIMIZED` build with ICX compiler

See merge request walberla/walberla!632

CMakeLists.txt

@@ -944,7 +944,7 @@ if ( WALBERLA_CXX_COMPILER_IS_MSVC )
     string(REPLACE "/Od" "/O2"   CMAKE_CXX_FLAGS_DEBUGOPTIMIZED ${CMAKE_CXX_FLAGS_DEBUGOPTIMIZED})
     string(REPLACE "/Ob0" "/Ob2" CMAKE_CXX_FLAGS_DEBUGOPTIMIZED ${CMAKE_CXX_FLAGS_DEBUGOPTIMIZED})
     string(REPLACE "/RTC1" ""    CMAKE_CXX_FLAGS_DEBUGOPTIMIZED ${CMAKE_CXX_FLAGS_DEBUGOPTIMIZED})
-elseif( WALBERLA_CXX_COMPILER_IS_GNU OR WALBERLA_CXX_COMPILER_IS_INTEL OR WALBERLA_CXX_COMPILER_IS_CLANG )
+elseif( WALBERLA_CXX_COMPILER_IS_GNU OR WALBERLA_CXX_COMPILER_IS_INTEL OR WALBERLA_CXX_COMPILER_IS_CLANG OR WALBERLA_CXX_COMPILER_IS_INTELLLVM )
    set( CMAKE_C_FLAGS_DEBUGOPTIMIZED   "${CMAKE_C_FLAGS_DEBUGOPTIMIZED} -O3" )
    set( CMAKE_CXX_FLAGS_DEBUGOPTIMIZED "${CMAKE_CXX_FLAGS_DEBUGOPTIMIZED} -O3" )
 endif()