More ms_struct bitfield stuff:

Adjacent bit fields are packed into the same 1-, 2-, or
4-byte allocation unit if the integral types are the same
size. // rdar://8823265.

llvm-svn: 130851

1 files changed, 23 insertions, 0 deletions

diff --git a/clang/test/CodeGen/ms_struct.c b/clang/test/CodeGen/ms_struct.c
new file mode 100644
index 00000000000..a5f9606daf3
--- /dev/null
+++ b/clang/test/CodeGen/ms_struct.c
@@ -0,0 +1,23 @@
+// RUN: %clang_cc1 -triple i386-apple-darwin10 -emit-llvm %s -o - | FileCheck %s
+
+#define ATTR __attribute__((__ms_struct__))
+struct s1 {
+  int       f32;
+  long long f64;
+} ATTR s1;
+
+// CHECK: %struct.s1 = type { i32, [4 x i8], i64 }
+
+struct s2 {
+  int       f32;
+  long long f64[4];
+} ATTR s2;
+
+// CHECK: %struct.s2 = type { i32, [4 x i8], [4 x i64] }
+
+struct s3 {
+  int       f32;
+  struct s1 s;
+} ATTR s3;
+
+// CHECK: %struct.s3 = type { i32, [4 x i8], %struct.s1 }