Add partial support for using anonymous bitfields (e.g., int : 0) to enforce

alignment.  This fixes cases where the anonymous bitfield is followed by a 
non-bitfield member.  E.g.,

struct t4
{
  int foo : 1;
  long : 0;
  char bar;
};

Part of rdar://9859156

llvm-svn: 136858

1 files changed, 2 insertions, 0 deletions

diff --git a/clang/lib/Basic/TargetInfo.cpp b/clang/lib/Basic/TargetInfo.cpp
index 7ea51467c18..91b16d57788 100644
--- a/clang/lib/Basic/TargetInfo.cpp
+++ b/clang/lib/Basic/TargetInfo.cpp
@@ -53,6 +53,8 @@ TargetInfo::TargetInfo(const std::string &T) : Triple(T) {
   Int64Type = SignedLongLong;
   SigAtomicType = SignedInt;
   UseBitFieldTypeAlignment = true;
+  UseZeroLengthBitfieldAlignment = false;
+  ZeroLengthBitfieldBoundary = 0;
   FloatFormat = &llvm::APFloat::IEEEsingle;
   DoubleFormat = &llvm::APFloat::IEEEdouble;
   LongDoubleFormat = &llvm::APFloat::IEEEdouble;