[clang-tools-extra] [clang-change-namespace] Avoid repeated hash lookups (NFC) (PR #111784)

[Kazu Hirata via cfe-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/111784

None

>From faf633c5d8a3f255aca95d80bbc4e4e2eede84e3 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Wed, 9 Oct 2024 06:51:41 -0700
Subject: [PATCH] [clang-change-namespace] Avoid repeated hash lookups (NFC)

---
 clang-tools-extra/clang-change-namespace/ChangeNamespace.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/clang-tools-extra/clang-change-namespace/ChangeNamespace.cpp b/clang-tools-extra/clang-change-namespace/ChangeNamespace.cpp
index 879c0d26d472a8..850df7daf5c038 100644
--- a/clang-tools-extra/clang-change-namespace/ChangeNamespace.cpp
+++ b/clang-tools-extra/clang-change-namespace/ChangeNamespace.cpp
@@ -606,9 +606,8 @@ void ChangeNamespaceTool::run(
                  Result.Nodes.getNodeAs<DeclRefExpr>("func_ref")) {
     // If this reference has been processed as a function call, we do not
     // process it again.
-    if (ProcessedFuncRefs.count(FuncRef))
+    if (!ProcessedFuncRefs.insert(FuncRef).second)
       return;
-    ProcessedFuncRefs.insert(FuncRef);
     const auto *Func = Result.Nodes.getNodeAs<FunctionDecl>("func_decl");
     assert(Func);
     const auto *Context = Result.Nodes.getNodeAs<Decl>("dc");