[CodeView] Implement support for bitfields in Clang
Emit the underlying storage offset in addition to the starting bit
position of the field.
This fixes PR28162.
Differential Revision: http://reviews.llvm.org/D21783
llvm-svn: 274201
diff --git a/clang/test/CodeGenCXX/debug-info-ms-bitfields.cpp b/clang/test/CodeGenCXX/debug-info-ms-bitfields.cpp
new file mode 100644
index 0000000..07d4c0c
--- /dev/null
+++ b/clang/test/CodeGenCXX/debug-info-ms-bitfields.cpp
@@ -0,0 +1,10 @@
+// RUN: %clang_cc1 -triple x86_64-pc-win32 -debug-info-kind=limited -gcodeview %s -emit-llvm -o - | FileCheck %s
+
+#pragma pack(1)
+struct S {
+ char : 8;
+ short : 8;
+ short x : 8;
+} s;
+
+// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "x", {{.*}}, size: 8, align: 16, offset: 16, flags: DIFlagBitField, extraData: i64 8)