[modules] Stop updating all identifiers when writing a module. This is

unnecessary in C++ modules (where we don't need the identifiers for their
Decls) and expensive.

llvm-svn: 245821

1 files changed, 2 insertions, 0 deletions

diff --git a/clang/lib/Serialization/ASTReaderInternals.h b/clang/lib/Serialization/ASTReaderInternals.h
index 701cf7300f6..47640f6c47b 100644
--- a/clang/lib/Serialization/ASTReaderInternals.h
+++ b/clang/lib/Serialization/ASTReaderInternals.h
@@ -137,6 +137,8 @@ public:
                      const unsigned char* d,
                      unsigned DataLen);
   
+  IdentID ReadIdentifierID(const unsigned char *d);
+
   ASTReader &getReader() const { return Reader; }
 };