[llvm] [Analysis] Avoid repeated hash lookups (NFC) (PR #130236)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-analysis

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/130236.diff


1 Files Affected:

- (modified) llvm/include/llvm/Analysis/BlockFrequencyInfoImpl.h (+3-2) 


``````````diff
diff --git a/llvm/include/llvm/Analysis/BlockFrequencyInfoImpl.h b/llvm/include/llvm/Analysis/BlockFrequencyInfoImpl.h
index 9509e5234840f..66ea5ecbc4bfb 100644
--- a/llvm/include/llvm/Analysis/BlockFrequencyInfoImpl.h
+++ b/llvm/include/llvm/Analysis/BlockFrequencyInfoImpl.h
@@ -1571,7 +1571,8 @@ void BlockFrequencyInfoImpl<BT>::initTransitionProbabilities(
     SmallPtrSet<const BlockT *, 2> UniqueSuccs;
     for (const auto SI : children<const BlockT *>(BB)) {
       // Ignore cold blocks
-      if (!BlockIndex.contains(SI))
+      auto BlockIndexIt = BlockIndex.find(SI);
+      if (BlockIndexIt == BlockIndex.end())
         continue;
       // Ignore parallel edges between BB and SI blocks
       if (!UniqueSuccs.insert(SI).second)
@@ -1583,7 +1584,7 @@ void BlockFrequencyInfoImpl<BT>::initTransitionProbabilities(
 
       auto EdgeProb =
           Scaled64::getFraction(EP.getNumerator(), EP.getDenominator());
-      size_t Dst = BlockIndex.find(SI)->second;
+      size_t Dst = BlockIndexIt->second;
       Succs[Src].push_back(std::make_pair(Dst, EdgeProb));
       SumProb[Src] += EdgeProb;
     }

``````````

</details>


https://github.com/llvm/llvm-project/pull/130236