[llvm] [NFC][SampleFDO] Use const& to avoid copies (PR #164584)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-pgo

Author: Abhishek Kaushik (abhishek-kaushik22)

<details>
<summary>Changes</summary>

Use const& in range-based for loop to avoid unnecessary copies

---
Full diff: https://github.com/llvm/llvm-project/pull/164584.diff


1 Files Affected:

- (modified) llvm/include/llvm/ProfileData/SampleProf.h (+1-1) 


``````````diff
diff --git a/llvm/include/llvm/ProfileData/SampleProf.h b/llvm/include/llvm/ProfileData/SampleProf.h
index 3dd34aba2d716..05f1b568b0643 100644
--- a/llvm/include/llvm/ProfileData/SampleProf.h
+++ b/llvm/include/llvm/ProfileData/SampleProf.h
@@ -1072,7 +1072,7 @@ class FunctionSamples {
     TypeCountMap &TypeCounts = getTypeSamplesAt(Loc);
     bool Overflowed = false;
 
-    for (const auto [Type, Count] : Other) {
+    for (const auto &[Type, Count] : Other) {
       FunctionId TypeId(Type);
       bool RowOverflow = false;
       TypeCounts[TypeId] = SaturatingMultiplyAdd(

``````````

</details>


https://github.com/llvm/llvm-project/pull/164584