reinterpret_cast to reference of a bit-field is not allowed.

Fixes rdar://9202628 & http://llvm.org/PR9564.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130024 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/Sema/SemaCXXCast.cpp b/lib/Sema/SemaCXXCast.cpp
index a0d1514bd0..29475539d7 100644
--- a/lib/Sema/SemaCXXCast.cpp
+++ b/lib/Sema/SemaCXXCast.cpp
@@ -1326,6 +1326,13 @@ static TryCastResult TryReinterpretCast(Sema &Self, ExprResult &SrcExpr,
     // C++ 5.2.10p10: [...] a reference cast reinterpret_cast<T&>(x) has the
     //   same effect as the conversion *reinterpret_cast<T*>(&x) with the
     //   built-in & and * operators.
+
+    // Cannot get address of a bitfield.
+    if (SrcExpr.get()->getObjectKind() == OK_BitField) {
+      msg = diag::err_bad_reinterpret_cast_bitfield;
+      return TC_NotApplicable;
+    }
+
     // This code does this transformation for the checked types.
     DestType = Self.Context.getPointerType(DestTypeTmp->getPointeeType());
     SrcType = Self.Context.getPointerType(SrcType);