[AST] Avoid repeated set lookups (NFC)

[kazutakahirata]

No description provided.

[llvmbot]

@llvm/pr-subscribers-clang

Author: Kazu Hirata (kazutakahirata)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/112155.diff

1 Files Affected:

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

diff --git a/clang/lib/AST/InheritViz.cpp b/clang/lib/AST/InheritViz.cpp
index 2ed0ce1c79c5bd..1dafed837a3560 100644
--- a/clang/lib/AST/InheritViz.cpp
+++ b/clang/lib/AST/InheritViz.cpp
@@ -63,12 +63,11 @@ void InheritanceHierarchyWriter::WriteNode(QualType Type, bool FromVirtual) {
   QualType CanonType = Context.getCanonicalType(Type);
 
   if (FromVirtual) {
-    if (KnownVirtualBases.find(CanonType) != KnownVirtualBases.end())
+    if (!KnownVirtualBases.insert(CanonType).second)
       return;
 
     // We haven't seen this virtual base before, so display it and
     // its bases.
-    KnownVirtualBases.insert(CanonType);
   }
 
   // Declare the node itself.

[nikic]

LGTM