[libFuzzer] better document the -merge=1 flag, part 2
llvm-svn: 268958
diff --git a/llvm/docs/LibFuzzer.rst b/llvm/docs/LibFuzzer.rst
index d7947eb..e2f6d94 100644
--- a/llvm/docs/LibFuzzer.rst
+++ b/llvm/docs/LibFuzzer.rst
@@ -81,6 +81,13 @@
mkdir NEW_CORPUS_DIR # Store minimized corpus here.
./my-fuzzer -merge=1 NEW_CORPUS_DIR FULL_CORPUS_DIR
+You may use the same flag to add more interesting items to an existing corpus.
+Only the inputs that trigger new coverage will be added to the first corpus.
+
+.. code-block:: console
+
+ ./my-fuzzer -merge=1 CURRNT_CORPUS_DIR NEW_POTENTIALLY_INTERESTING_INPUTS_DIR
+
Getting Started
===============