PR50294: Fix a performance regression from 2c9dbcd.

Per the contract of ReadLateParsedTemplates, we should not be returning the same results multiple times. No functionality change intended, other than to runtime. Thanks to Luboš Luňák for identifying the cause of the regression!
llvm · Sep 2, 2021 · 6eda66b · 6eda66b
1 parent 4d5220f
commit 6eda66b
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
@@ -8412,6 +8412,8 @@ void ASTReader::ReadLateParsedTemplates(
       LPTMap.insert(std::make_pair(FD, std::move(LT)));
     }
   }
+
+  LateParsedTemplates.clear();
 }
 
 void ASTReader::LoadSelector(Selector Sel) {