[lit] Document the 'available_features' member of the config object.
llvm-svn: 276744
diff --git a/llvm/docs/CommandGuide/lit.rst b/llvm/docs/CommandGuide/lit.rst
index b2da58e..7fc3455 100644
--- a/llvm/docs/CommandGuide/lit.rst
+++ b/llvm/docs/CommandGuide/lit.rst
@@ -324,6 +324,9 @@
on the pipe fail. If this is not desired, setting this variable to false
makes the test fail only if the last command in the pipe fails.
+ **available_features** A set of features that can be used in `XFAIL`,
+ `REQUIRES`, and `UNSUPPORTED` directives.
+
TEST DISCOVERY
~~~~~~~~~~~~~~