diff --git a/llvm/docs/TestingGuide.rst b/llvm/docs/TestingGuide.rst
--- a/llvm/docs/TestingGuide.rst
+++ b/llvm/docs/TestingGuide.rst
@@ -275,6 +275,20 @@
 test. Check if there are files already covering your feature and consider
 adding your code there instead of creating a new file.
 
+Generating assertions in regression tests
+-----------------------------------------
+
+Some regression test cases are very large and complex to write/update by hand.
+In that case to reduce the human work we can use the scripts available in
+llvm/utils/ to generate the assertions.
+
+For example to update assertions in all the RISCV CodeGen's 'llc' based tests,
+run:
+
+ .. code-block:: bash
+
+     % llvm/utils/update_llc_test_checks.py --llc-binary build/bin/llc -u `find llvm/test/CodeGen/RISCV/ \( -name '*.ll' -o -name '*.mir' \)`
+
 Extra files
 -----------