[llvm] [IR] Avoid repeated map lookups (NFC) (PR #128396)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-ir

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/128396.diff


1 Files Affected:

- (modified) llvm/include/llvm/IR/ModuleSummaryIndexYAML.h (+1-2) 


``````````diff
diff --git a/llvm/include/llvm/IR/ModuleSummaryIndexYAML.h b/llvm/include/llvm/IR/ModuleSummaryIndexYAML.h
index b23fd4a72c93b..14b8ce5df8536 100644
--- a/llvm/include/llvm/IR/ModuleSummaryIndexYAML.h
+++ b/llvm/include/llvm/IR/ModuleSummaryIndexYAML.h
@@ -229,8 +229,7 @@ template <> struct CustomMappingTraits<GlobalValueSummaryMapTy> {
           static_cast<GlobalValueSummary::ImportKind>(GVSum.ImportType));
       if (GVSum.Aliasee) {
         auto ASum = std::make_unique<AliasSummary>(GVFlags);
-        if (!V.count(*GVSum.Aliasee))
-          V.emplace(*GVSum.Aliasee, /*IsAnalysis=*/false);
+        V.try_emplace(*GVSum.Aliasee, /*IsAnalysis=*/false);
         ValueInfo AliaseeVI(/*IsAnalysis=*/false, &*V.find(*GVSum.Aliasee));
         // Note: Aliasee cannot be filled until all summaries are loaded.
         // This is done in fixAliaseeLinks() which is called in

``````````

</details>


https://github.com/llvm/llvm-project/pull/128396