Implement a new command line option, -debug, which is meant to unify all of
the random debugging macros scattered throughout llvm.
The new DEBUG(x) macro should be used instead of special purpose debug macros.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2709 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/Support/Statistic.h b/include/Support/Statistic.h
index 5c46486..453af34 100644
--- a/include/Support/Statistic.h
+++ b/include/Support/Statistic.h
@@ -19,6 +19,27 @@
#include <iosfwd>
+// DebugFlag - This boolean is set to true if the '-debug' command line option
+// is specified. This should probably not be referenced directly, instead, use
+// the DEBUG macro below.
+//
+extern bool DebugFlag;
+
+// DEBUG macro - This macro should be used by passes to emit debug information.
+// In 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:
+//
+// DEBUG(cerr << "Bitset contains: " << Bitset << "\n");
+//
+#ifdef NDEBUG
+#define DEBUG(X)
+#else
+#define DEBUG(X) \
+ do { if (DebugFlag) { X; } } while (0)
+#endif
+
+
// StatisticBase - Nontemplated base class for Statistic<> class...
class StatisticBase {
const char *Name;