Make Sema::LocallyScopedExternalDecls lazily deserialized. In theory,

we could turn this into an on-disk hash table so we don't load the
whole thing the first time we need it. However, it tends to be very,
very small (i.e., empty) for most precompiled headers, so it isn't all
that interesting.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@136352 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 3 deletions

diff --git a/lib/Serialization/ASTWriter.cpp b/lib/Serialization/ASTWriter.cpp
index 9a666910b5..e63950e826 100644
--- a/lib/Serialization/ASTWriter.cpp
+++ b/lib/Serialization/ASTWriter.cpp
@@ -2876,9 +2876,11 @@ void ASTWriter::WriteASTCore(Sema &SemaRef, MemorizeStatCalls *StatCalls,
   for (llvm::DenseMap<DeclarationName, NamedDecl *>::iterator
          TD = SemaRef.LocallyScopedExternalDecls.begin(),
          TDEnd = SemaRef.LocallyScopedExternalDecls.end();
-       TD != TDEnd; ++TD)
-    AddDeclRef(TD->second, LocallyScopedExternalDecls);
-
+       TD != TDEnd; ++TD) {
+    if (TD->second->getPCHLevel() == 0)
+      AddDeclRef(TD->second, LocallyScopedExternalDecls);
+  }
+  
   // Build a record containing all of the ext_vector declarations.
   RecordData ExtVectorDecls;
   AddLazyVectorDecls(*this, SemaRef.ExtVectorDecls, ExtVectorDecls);