[clang] [AST] Avoid repeated hash lookups (NFC) (PR #109603)

[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/109603.diff


1 Files Affected:

- (modified) clang/lib/AST/ASTContext.cpp (+1-2) 


``````````diff
diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 8bd5abf2bf9643..fd8aa8de79b49f 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -12587,8 +12587,7 @@ void ASTContext::forEachMultiversionedFunctionVersion(
        FD->getDeclContext()->getRedeclContext()->lookup(FD->getDeclName())) {
     FunctionDecl *CurFD = CurDecl->getAsFunction()->getMostRecentDecl();
     if (CurFD && hasSameType(CurFD->getType(), FD->getType()) &&
-        !SeenDecls.contains(CurFD)) {
-      SeenDecls.insert(CurFD);
+        SeenDecls.insert(CurFD).second) {
       Pred(CurFD);
     }
   }

``````````

</details>


https://github.com/llvm/llvm-project/pull/109603