[llvm] [BOLT][NFC] Don't assign YAML profile to functions with no CFG (PR #92487)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-bolt

Author: Amir Ayupov (aaupov)

<details>
<summary>Changes</summary>

YAML profile for non-simple functions without CFG is
  1) useless for optimizations,
  2) can't be attached, similar to fdata profile,
  3) would be reported as invalid/stale even if the profile is valid.

Don't attempt to attach the profile in this case, aligning the behavior
to DataReader.

---
Full diff: https://github.com/llvm/llvm-project/pull/92487.diff


1 Files Affected:

- (modified) bolt/lib/Profile/YAMLProfileReader.cpp (+3) 


``````````diff
diff --git a/bolt/lib/Profile/YAMLProfileReader.cpp b/bolt/lib/Profile/YAMLProfileReader.cpp
index 978a7cadfe798..29d94067f459f 100644
--- a/bolt/lib/Profile/YAMLProfileReader.cpp
+++ b/bolt/lib/Profile/YAMLProfileReader.cpp
@@ -99,6 +99,9 @@ bool YAMLProfileReader::parseFunctionProfile(
       FuncRawBranchCount += YamlSI.Count;
   BF.setRawBranchCount(FuncRawBranchCount);
 
+  if (BF.empty())
+    return true;
+
   if (!opts::IgnoreHash &&
       YamlBF.Hash != BF.computeHash(IsDFSOrder, HashFunction)) {
     if (opts::Verbosity >= 1)

``````````

</details>


https://github.com/llvm/llvm-project/pull/92487