[AST] Move the enum in ObjCMethodDeclBitfields

Move the enum { ObjCMethodFamilyBitWidth = 4 } to the top of
the class. For some dark reason having the enum between the
bitfields breaks the packing with gcc version 7.3-win32 20180312.

Reported by: Abramo Bagnara (by email)

llvm-svn: 339017

1 files changed, 3 insertions, 2 deletions

diff --git a/clang/include/clang/AST/DeclBase.h b/clang/include/clang/AST/DeclBase.h
index 3f7f756a342..85357111221 100644
--- a/clang/include/clang/AST/DeclBase.h
+++ b/clang/include/clang/AST/DeclBase.h
@@ -1554,8 +1554,6 @@ class DeclContext {
   /// methods in ObjCMethodDecl should be updated appropriately.
   class ObjCMethodDeclBitfields {
     friend class ObjCMethodDecl;
-    /// For the bits in DeclContextBitfields.
-    uint64_t : NumDeclContextBits;
 
     /// This is needed for the bitwidth of Family below but
     /// is defined in Basic/IdentifierTable.h which we do not include.
@@ -1564,6 +1562,9 @@ class DeclContext {
     /// that these two ObjCMethodFamilyBitWidth are equal.
     enum { ObjCMethodFamilyBitWidth = 4 };
 
+    /// For the bits in DeclContextBitfields.
+    uint64_t : NumDeclContextBits;
+
     /// The conventional meaning of this method; an ObjCMethodFamily.
     /// This is not serialized; instead, it is computed on demand and
     /// cached.