[llvm] [ProfileData] Use DenseMap::lookup (NFC) (PR #94818)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-pgo

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/94818.diff


1 Files Affected:

- (modified) llvm/include/llvm/ProfileData/InstrProf.h (+1-3) 


``````````diff
diff --git a/llvm/include/llvm/ProfileData/InstrProf.h b/llvm/include/llvm/ProfileData/InstrProf.h
index 15b9eb688e27e..8db10127421aa 100644
--- a/llvm/include/llvm/ProfileData/InstrProf.h
+++ b/llvm/include/llvm/ProfileData/InstrProf.h
@@ -729,9 +729,7 @@ Function* InstrProfSymtab::getFunction(uint64_t FuncMD5Hash) {
 }
 
 GlobalVariable *InstrProfSymtab::getGlobalVariable(uint64_t MD5Hash) {
-  if (auto Iter = MD5VTableMap.find(MD5Hash); Iter != MD5VTableMap.end())
-    return Iter->second;
-  return nullptr;
+  return MD5VTableMap.lookup(MD5Hash);
 }
 
 // To store the sums of profile count values, or the percentage of

``````````

</details>


https://github.com/llvm/llvm-project/pull/94818