When laying out bitfields, make sure that the data size is always aligned to a byte. This fixes PR5580.

llvm-svn: 89611

1 files changed, 17 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/class-layout.cpp b/clang/test/SemaCXX/class-layout.cpp
index 56f41bfbdb9..b5971723a70 100644
--- a/clang/test/SemaCXX/class-layout.cpp
+++ b/clang/test/SemaCXX/class-layout.cpp
@@ -47,3 +47,20 @@ struct G { G(); };
 struct H : G { };
 
 SA(6, sizeof(H) == 1);
+
+// PR5580
+namespace PR5580 {
+
+class A { bool iv0 : 1; };
+SA(7, sizeof(A) == 1);  
+
+class B : A { bool iv0 : 1; };
+SA(8, sizeof(B) == 2);
+
+struct C { bool iv0 : 1; };
+SA(9, sizeof(C) == 1);  
+
+struct D : C { bool iv0 : 1; };
+SA(10, sizeof(D) == 2);
+
+}