Add more documentation about the TargetStreamer interface.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192796 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CodeGenerator.rst b/docs/CodeGenerator.rst
index 4b99288..c87a628 100644
--- a/docs/CodeGenerator.rst
+++ b/docs/CodeGenerator.rst
@@ -643,6 +643,11 @@
asm streamer just prints it (``emitFnStart -> .fnstrart``), and the object
streamer implement the assembler logic for it.
+To make llvm use these classes, the target initialization must call
+TargetRegistry::RegisterAsmStreamer and TargetRegistry::RegisterMCObjectStreamer
+passing callbacks that allocate the corresponding target streamer and pass it
+to createAsmStreamer or to the appropriate object streamer constructor.
+
The ``MCContext`` class
-----------------------