[llvm] [AsmParser] Avoid repeated map lookups (NFC) (PR #128629)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/128629

None

>From 9054afd565fb45358386291c87b4077d23c6cef1 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Mon, 24 Feb 2025 01:02:33 -0800
Subject: [PATCH] [AsmParser] Avoid repeated map lookups (NFC)

---
 llvm/lib/AsmParser/LLParser.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp
index 2e8487db45f64..690e92a0f2afc 100644
--- a/llvm/lib/AsmParser/LLParser.cpp
+++ b/llvm/lib/AsmParser/LLParser.cpp
@@ -1036,9 +1036,10 @@ bool LLParser::parseStandaloneMetadata() {
 
     assert(NumberedMetadata[MetadataID] == Init && "Tracking VH didn't work");
   } else {
-    if (NumberedMetadata.count(MetadataID))
+    auto [It, Inserted] = NumberedMetadata.try_emplace(MetadataID);
+    if (!Inserted)
       return tokError("Metadata id is already used");
-    NumberedMetadata[MetadataID].reset(Init);
+    It->second.reset(Init);
   }
 
   return false;