DEBUG_WITH_TYPE macro - This macro should be used by passes to emit debug information. If the '-debug' option is specified on the commandline, and if this is a debug build, then the code specified as the option to the macro will be executed. Otherwise it will not be. Example:
Declared in <llvm/Support/Debug.h>
#define DEBUG_WITH_TYPE(TYPE, ...)
DEBUG_WITH_TYPE("bitset", dbgs() << "Bitset contains: " << Bitset << "n");
This will emit the debug information if -debug is present, and -debug-only is not specified, or is specified as "bitset".