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

[Kazu Hirata via llvm-commits]

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

None

>From a93ab1fb59da5caec1a7bd12732096d1c31830a6 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Thu, 20 Mar 2025 09:45:17 -0700
Subject: [PATCH] [lld] Avoid repeated map lookups (NFC)

---
 lld/COFF/Writer.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

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";