[clang-tidy] Avoid repeated hash lookups (NFC)

[kazutakahirata]

No description provided.

[llvmbot]

@llvm/pr-subscribers-clang-tidy

@llvm/pr-subscribers-clang-tools-extra

Author: Kazu Hirata (kazutakahirata)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/112074.diff

1 Files Affected:

• (modified) clang-tools-extra/clang-tidy/misc/ConfusableIdentifierCheck.cpp (+3-3)

diff --git a/clang-tools-extra/clang-tidy/misc/ConfusableIdentifierCheck.cpp b/clang-tools-extra/clang-tidy/misc/ConfusableIdentifierCheck.cpp
index 5b1b1cd152fffb..6df565c9a9d691 100644
--- a/clang-tools-extra/clang-tidy/misc/ConfusableIdentifierCheck.cpp
+++ b/clang-tools-extra/clang-tidy/misc/ConfusableIdentifierCheck.cpp
@@ -137,11 +137,11 @@ static bool mayShadow(const NamedDecl *ND0,
 const ConfusableIdentifierCheck::ContextInfo *
 ConfusableIdentifierCheck::getContextInfo(const DeclContext *DC) {
   const DeclContext *PrimaryContext = DC->getPrimaryContext();
-  auto It = ContextInfos.find(PrimaryContext);
-  if (It != ContextInfos.end())
+  auto [It, Inserted] = ContextInfos.try_emplace(PrimaryContext);
+  if (!Inserted)
     return &It->second;
 
-  ContextInfo &Info = ContextInfos[PrimaryContext];
+  ContextInfo &Info = It->second;
   Info.PrimaryContext = PrimaryContext;
   Info.NonTransparentContext = PrimaryContext;
 

[nikic]

LGTM