objective-C blocks: Provide layout map for byref

variables captured in a block. // rdar://12184410



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167931 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 1 deletions

diff --git a/include/clang/AST/ASTContext.h b/include/clang/AST/ASTContext.h
index 25135133d4..234281343d 100644
--- a/include/clang/AST/ASTContext.h
+++ b/include/clang/AST/ASTContext.h
@@ -865,7 +865,15 @@ public:
 
   /// Returns true iff we need copy/dispose helpers for the given type.
   bool BlockRequiresCopying(QualType Ty) const;
-
+  
+  
+  /// Returns true, if given type has a known lifetime. HasByrefExtendedLayout is set
+  /// to false in this case. If HasByrefExtendedLayout returns true, byref variable
+  /// has extended lifetime. 
+  bool getByrefLifetime(QualType Ty,
+                        Qualifiers::ObjCLifetime &Lifetime,
+                        bool &HasByrefExtendedLayout) const;
+  
   /// \brief Return the uniqued reference to the type for an lvalue reference
   /// to the specified type.
   QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true)