diff --git a/docs/ProgrammersManual.html b/docs/ProgrammersManual.html
index e3f91a2af64..e920cbbc646 100644
--- a/docs/ProgrammersManual.html
+++ b/docs/ProgrammersManual.html
@@ -646,6 +646,21 @@ on when the name is specified. This allows, for example, all debug information
for instruction scheduling to be enabled with -debug-type=InstrSched,
even if the source lives in multiple files.
+The DEBUG_WITH_TYPE macro is also available for situations where you
+would like to set DEBUG_TYPE, but only for one specific DEBUG
+statement. It takes an additional first parameter, which is the type to use. For
+example, the preceeding example could be written as:
+
+
+
+
+DEBUG_WITH_TYPE("", errs() << "No debug type\n");
+DEBUG_WITH_TYPE("foo", errs() << "'foo' debug type\n");
+DEBUG_WITH_TYPE("bar", errs() << "'bar' debug type\n"));
+DEBUG_WITH_TYPE("", errs() << "No debug type (2)\n");
+
+
+
diff --git a/include/llvm/Support/Debug.h b/include/llvm/Support/Debug.h
index 69544de9111..17dca216098 100644
--- a/include/llvm/Support/Debug.h
+++ b/include/llvm/Support/Debug.h
@@ -42,24 +42,36 @@ extern bool DebugFlag;
//
bool isCurrentDebugType(const char *Type);
+// DEBUG_WITH_TYPE 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_WITH_TYPE("bitset", errs() << "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".
+
+#ifdef NDEBUG
+#define DEBUG_WITH_TYPE(TYPE, X) do { } while (0)
+#else
+#define DEBUG_WITH_TYPE(TYPE, X) \
+ do { if (DebugFlag && isCurrentDebugType(TYPE)) { X; } } while (0)
+#endif
+
// 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");
+// DEBUG(errs() << "Bitset contains: " << Bitset << "\n");
//
#ifndef DEBUG_TYPE
#define DEBUG_TYPE ""
#endif
-#ifdef NDEBUG
-#define DEBUG(X)
-#else
-#define DEBUG(X) \
- do { if (DebugFlag && isCurrentDebugType(DEBUG_TYPE)) { X; } } while (0)
-#endif
+#define DEBUG(X) DEBUG_WITH_TYPE(DEBUG_TYPE, X)
/// getNullOutputStream - Return a null string that does not output
/// anything. This hides the static variable from other modules.