add support for a 1<<29 bit in the block flags field to mark blocks using alternate struct return ABI


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97775 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGBlocks.h b/lib/CodeGen/CGBlocks.h
index 39f26f8..e91319f 100644
--- a/lib/CodeGen/CGBlocks.h
+++ b/lib/CodeGen/CGBlocks.h
@@ -54,10 +54,12 @@
         BLOCK_HAS_COPY_DISPOSE =  (1 << 25),
         BLOCK_HAS_CXX_OBJ =       (1 << 26),
         BLOCK_IS_GLOBAL =         (1 << 28),
-        BLOCK_HAS_OBJC_TYPE  =    (1 << 30)
+        BLOCK_USE_STRET =         (1 << 29),
+        BLOCK_HAS_SIGNATURE  =    (1 << 30)
     };
 };
 
+
 class BlockModule : public BlockBase {
   ASTContext &Context;
   llvm::Module &TheModule;