Store in PCH the key function of C++ class to avoid deserializing the complete declaration context in order to compute it.

Progress for rdar://7260160.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@116508 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/Serialization/ASTReaderDecl.cpp b/lib/Serialization/ASTReaderDecl.cpp
index 97adbf73cc..e8fe264651 100644
--- a/lib/Serialization/ASTReaderDecl.cpp
+++ b/lib/Serialization/ASTReaderDecl.cpp
@@ -833,6 +833,15 @@ void ASTDeclReader::VisitCXXRecordDecl(CXXRecordDecl *D) {
     break;
   }
   }
+
+  // Load the key function to avoid deserializing every method so we can
+  // compute it.
+  if (D->IsDefinition) {
+    CXXMethodDecl *Key
+        = cast_or_null<CXXMethodDecl>(Reader.GetDecl(Record[Idx++]));
+    if (Key)
+      C.KeyFunctions[D] = Key;
+  }
 }
 
 void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {