[NFC][SampleFDO] Use const& to avoid copies

[abhishek-kaushik22]

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

[llvmbot]

@llvm/pr-subscribers-pgo

Author: Abhishek Kaushik (abhishek-kaushik22)

Changes

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 --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(