[llvm] [IPO] Avoid repeated hash lookups (NFC) (PR #135750)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-transforms

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/135750.diff


1 Files Affected:

- (modified) llvm/lib/Transforms/IPO/MemProfContextDisambiguation.cpp (+4-4) 


``````````diff
diff --git a/llvm/lib/Transforms/IPO/MemProfContextDisambiguation.cpp b/llvm/lib/Transforms/IPO/MemProfContextDisambiguation.cpp
index a5e0251277d8f..b08536471b92e 100644
--- a/llvm/lib/Transforms/IPO/MemProfContextDisambiguation.cpp
+++ b/llvm/lib/Transforms/IPO/MemProfContextDisambiguation.cpp
@@ -4094,14 +4094,14 @@ bool CallsiteContextGraph<DerivedCCG, FuncTy, CallTy>::assignFunctions() {
         assert(FuncClonesToCallMap.count(FuncClone));
         std::map<CallInfo, CallInfo> &CallMap = FuncClonesToCallMap[FuncClone];
         CallInfo CallClone(Call);
-        if (CallMap.count(Call))
-          CallClone = CallMap[Call];
+        if (auto It = CallMap.find(Call); It != CallMap.end())
+          CallClone = It->second;
         CallsiteClone->setCall(CallClone);
         // Need to do the same for all matching calls.
         for (auto &MatchingCall : Node->MatchingCalls) {
           CallInfo CallClone(MatchingCall);
-          if (CallMap.count(MatchingCall))
-            CallClone = CallMap[MatchingCall];
+          if (auto It = CallMap.find(MatchingCall); It != CallMap.end())
+            CallClone = It->second;
           // Updates the call in the list.
           MatchingCall = CallClone;
         }

``````````

</details>


https://github.com/llvm/llvm-project/pull/135750