[llvm] [Analysis] Avoid repeated hash lookups (NFC) (PR #126402)

[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/126402.diff


1 Files Affected:

- (modified) llvm/lib/Analysis/DependenceGraphBuilder.cpp (+2-2) 


``````````diff
diff --git a/llvm/lib/Analysis/DependenceGraphBuilder.cpp b/llvm/lib/Analysis/DependenceGraphBuilder.cpp
index 7ee2adf49ebb410..82e9dcfbab23f3f 100644
--- a/llvm/lib/Analysis/DependenceGraphBuilder.cpp
+++ b/llvm/lib/Analysis/DependenceGraphBuilder.cpp
@@ -241,8 +241,8 @@ template <class G> void AbstractDependenceGraphBuilder<G>::createDefUseEdges() {
         if (!UI)
           continue;
         NodeType *DstNode = nullptr;
-        if (IMap.find(UI) != IMap.end())
-          DstNode = IMap.find(UI)->second;
+        if (auto It = IMap.find(UI); It != IMap.end())
+          DstNode = It->second;
 
         // In the case of loops, the scope of the subgraph is all the
         // basic blocks (and instructions within them) belonging to the loop. We

``````````

</details>


https://github.com/llvm/llvm-project/pull/126402