[clang] [Rewrite] Avoid repeated hash lookups (NFC) (PR #123696)

[Kazu Hirata via cfe-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/123696

None

>From 18c544645309d614fb288869ddc26ad7fe86a514 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Mon, 20 Jan 2025 10:33:13 -0800
Subject: [PATCH] [Rewrite] Avoid repeated hash lookups (NFC)

---
 clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp b/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
index fc65559e9d4a51..8f275536b98a6d 100644
--- a/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
+++ b/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
@@ -3800,8 +3800,8 @@ QualType RewriteModernObjC::GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *
   const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
   unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
   std::pair<const ObjCInterfaceDecl*, unsigned> tuple = std::make_pair(CDecl, GroupNo);
-  if (GroupRecordType.count(tuple))
-    return GroupRecordType[tuple];
+  if (auto It = GroupRecordType.find(tuple); It != GroupRecordType.end())
+    return It->second;
 
   SmallVector<ObjCIvarDecl *, 8> IVars;
   for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();