[clang] [Sema] Avoid repeated hash lookups (NFC) (PR #111090)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/111090.diff


1 Files Affected:

- (modified) clang/lib/Sema/SemaLambda.cpp (+3-3) 


``````````diff
diff --git a/clang/lib/Sema/SemaLambda.cpp b/clang/lib/Sema/SemaLambda.cpp
index c2b35856111f3b..aeb20299b714a3 100644
--- a/clang/lib/Sema/SemaLambda.cpp
+++ b/clang/lib/Sema/SemaLambda.cpp
@@ -423,11 +423,11 @@ bool Sema::DiagnoseInvalidExplicitObjectParameterInLambda(
   // is an empty cast path for the method stored in the context (signalling that
   // we've already diagnosed it) and then just not building the call, but that
   // doesn't really seem any simpler than diagnosing it at the call site...
-  if (auto It = Context.LambdaCastPaths.find(Method);
-      It != Context.LambdaCastPaths.end())
+  auto [It, Inserted] = Context.LambdaCastPaths.try_emplace(Method);
+  if (!Inserted)
     return It->second.empty();
 
-  CXXCastPath &Path = Context.LambdaCastPaths[Method];
+  CXXCastPath &Path = It->second;
   CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true,
                      /*DetectVirtual=*/false);
   if (!IsDerivedFrom(RD->getLocation(), ExplicitObjectParameterType, LambdaType,

``````````

</details>


https://github.com/llvm/llvm-project/pull/111090