2 files changed, 12 insertions, 0 deletions
diff --git a/lib/Basic/TargetInfo.cpp b/lib/Basic/TargetInfo.cpp
index 7ea51467c1..91b16d5778 100644
--- a/lib/Basic/TargetInfo.cpp
+++ b/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;
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index ec45a87fa0..89b6ce960b 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -1963,6 +1963,16 @@ public:
       // structures. This corresponds to PCC_BITFIELD_TYPE_MATTERS in gcc.
       UseBitFieldTypeAlignment = false;
 
+      /// Do force alignment of members that follow zero length bitfields.  If
+      /// the alignment of the zero-length bitfield is greater than the member 
+      /// that follows it, `bar', `bar' will be aligned as the  type of the 
+      /// zero length bitfield.
+      UseZeroLengthBitfieldAlignment = true;
+
+      /// gcc forces the alignment to 4 bytes, regardless of the type of the
+      /// zero length bitfield.
+      ZeroLengthBitfieldBoundary = 32;
+
       if (IsThumb) {
         // Thumb1 add sp, #imm requires the immediate value be multiple of 4,
         // so set preferred for small types to 32.