[PATCH] D152745: [Docs]Mention DTEST_SUITE_USE_IR_PGO O explicitly for LLLVM IR PGO in llvm-test-suite PGO testing

[Mingming Liu via Phabricator via llvm-commits]

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- Currently, the default instructions will use Clang's frontend PGO feature.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D152745

Files:
  llvm/docs/TestSuiteGuide.md


Index: llvm/docs/TestSuiteGuide.md
===================================================================
--- llvm/docs/TestSuiteGuide.md
+++ llvm/docs/TestSuiteGuide.md
@@ -336,7 +336,7 @@
 
 Example:
 ```bash
-# Profile generation run:
+# Profile generation run using clang frontend's PGO feature
 % cmake -DTEST_SUITE_PROFILE_GENERATE=ON \
         -DTEST_SUITE_RUN_TYPE=train \
         ../test-suite
@@ -351,6 +351,8 @@
 % llvm-lit -o result.json .
 ```
 
+To use LLVM IR PGO instead of the clang frontend's PGO feature, set `-DTEST_SUITE_USE_IR_PGO=On`.
+
 The `TEST_SUITE_RUN_TYPE` setting only affects the SPEC benchmark suites.
 
 


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