[lld] [lld] Avoid repeated map lookups (NFC) (PR #132327)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-lld

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/132327.diff


1 Files Affected:

- (modified) lld/COFF/Writer.cpp (+1-2) 


``````````diff
diff --git a/lld/COFF/Writer.cpp b/lld/COFF/Writer.cpp
index f488721106e15..6ed1f884a9636 100644
--- a/lld/COFF/Writer.cpp
+++ b/lld/COFF/Writer.cpp
@@ -1278,8 +1278,7 @@ void Writer::createImportTables() {
       continue;
 
     std::string dll = StringRef(file->dllName).lower();
-    if (ctx.config.dllOrder.count(dll) == 0)
-      ctx.config.dllOrder[dll] = ctx.config.dllOrder.size();
+    ctx.config.dllOrder.try_emplace(dll, ctx.config.dllOrder.size());
 
     if (file->impSym && !isa<DefinedImportData>(file->impSym))
       Fatal(ctx) << file->symtab.printSymbol(file->impSym) << " was replaced";

``````````

</details>


https://github.com/llvm/llvm-project/pull/132327