Basic support for -mms-bitfields, from Carl Norum!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124661 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/ASTWriter.cpp b/lib/Serialization/ASTWriter.cpp
index e906407..b85aac1 100644
--- a/lib/Serialization/ASTWriter.cpp
+++ b/lib/Serialization/ASTWriter.cpp
@@ -911,6 +911,7 @@
   Record.push_back(LangOpts.Exceptions);  // Support exception handling.
   Record.push_back(LangOpts.SjLjExceptions);
 
+  Record.push_back(LangOpts.MSBitfields); // MS-compatible structure layout
   Record.push_back(LangOpts.NeXTRuntime); // Use NeXT runtime.
   Record.push_back(LangOpts.Freestanding); // Freestanding implementation
   Record.push_back(LangOpts.NoBuiltin); // Do not use builtin functions (-fno-builtin)