Support #pragma weak for PCH.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110323 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 7 insertions, 1 deletions

diff --git a/include/clang/Frontend/PCHBitCodes.h b/include/clang/Frontend/PCHBitCodes.h
index a07060f800..37337963a1 100644
--- a/include/clang/Frontend/PCHBitCodes.h
+++ b/include/clang/Frontend/PCHBitCodes.h
@@ -250,7 +250,10 @@ namespace clang {
       REDECLS_UPDATE_LATEST = 29,
 
       /// \brief Record code for declarations that Sema keeps references of.
-      SEMA_DECL_REFS = 30
+      SEMA_DECL_REFS = 30,
+
+      /// \brief Record code for weak undeclared identifiers.
+      WEAK_UNDECLARED_IDENTIFIERS = 31
     };
 
     /// \brief Record types used within a source manager block.
diff --git a/include/clang/Frontend/PCHReader.h b/include/clang/Frontend/PCHReader.h
index f7690fbb21..76975a0e01 100644
--- a/include/clang/Frontend/PCHReader.h
+++ b/include/clang/Frontend/PCHReader.h
@@ -379,6 +379,9 @@ private:
   /// \brief The set of unused static functions stored in the the PCH
   /// file.
   llvm::SmallVector<uint64_t, 16> UnusedStaticFuncs;
+  
+  /// \brief The set of weak undeclared identifiers stored in the the PCH file.
+  llvm::SmallVector<uint64_t, 64> WeakUndeclaredIdentifiers;
 
   /// \brief The set of locally-scoped external declarations stored in
   /// the the PCH file.