(1) serialize out top-level decls BEFORE serializing out translation unit
structures like ASTContext.

(2) deserialize out translation unit structures like ASTContext before
top-level decls by first skipping the decls in the bitstream, deserializing
ASTContext and friends, and then jumping back to the bitstream block with the
decls and then deserializing them.

Change (1) allows us to utilize the pointer-tracking system in the Serializer
to only serialize out metadata that is actually referenced by the ASTS.

Change (2) allows us to deserialize the metadata first as before, which
signficantly reduces the amount of pointer backpatching the deserializer
would have to do if the decls were deserialized first.

llvm-svn: 43974

llvm-svn: 43790

file had the correct preamble.

llvm-svn: 43785

Revampled Serialization Tester to serialize and deserialize out an entire ASTContext and top-level decls.

llvm-svn: 43773

llvm-svn: 43738

new split-header file configuration (Serialize.h and Deserialize.h)
now in place in the core LLVM repository.

Removed unneeded SerializeTrait specializations for enums in
TokenKinds.h

llvm-svn: 43306

Updated serialization test code in the driver to test serialization of
these types.

llvm-svn: 43266

Silenced some VC++ warnings.
Had to rephrase a partial specialization of the IntrospectionTrait struct in SerializationTest.cpp, please review.
Added a compiler specific workaround in IdentifierTable.h. Is that the way to fix this kind of issues?

llvm-svn: 43074

llvm-svn: 43057

serialization logic as well as driver code is now in
Driver/SerializationTest.cpp.  The status of this code is that it
should be used by no clients.

Added --test-pickling option to driver to run the serialization code.

Modified IdentifierInfo and IdentifierTable to have friend classes
that permit object serialization.  Such friendship may not be needed
in the final design.

llvm-svn: 43052