[PATCH] D112936: [Docs] Document scripts that are use to generate assertion in test cases

[Shivam Gupta via Phabricator via llvm-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG2a7c3f8b02bf: [Docs] Document scripts that are use to generate assertion in test cases (authored by xgupta).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D112936/new/

https://reviews.llvm.org/D112936

Files:
  llvm/docs/TestingGuide.rst


Index: llvm/docs/TestingGuide.rst
===================================================================
--- llvm/docs/TestingGuide.rst
+++ llvm/docs/TestingGuide.rst
@@ -275,6 +275,45 @@
 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 generate assertions in an :program:`llc`-based test, run:
+
+ .. code-block:: bash
+
+     % llvm/utils/update_llc_test_checks.py --llc-binary build/bin/llc test.ll
+
+And if you want to update assertions in an existing test case, pass `-u` option
+which first check the ``NOTE:`` line exists and matches the script name.
+
+These are the most common scripts and their purposes/applications in generating
+assertions:
+
+.. code-block::
+
+  update_analyze_test_checks.py
+  opt --analyze --costmodel
+
+  update_cc_test_checks.py
+  C/C++, or clang/clang++ (IR checks)
+
+  update_llc_test_checks.py
+  llc (assembly checks)
+
+  update_mca_test_checks.py
+  llvm-mca
+
+  update_mir_test_checks.py
+  llc (MIR checks)
+
+  update_test_checks.py
+  opt
+
 Extra files
 -----------
 


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