1 files changed, 43 insertions, 0 deletions
diff --git a/clang/test/CodeGenCXX/bitfield-layout.cpp b/clang/test/CodeGenCXX/bitfield-layout.cpp
new file mode 100644
index 0000000..15f33d2
--- /dev/null
+++ b/clang/test/CodeGenCXX/bitfield-layout.cpp
@@ -0,0 +1,43 @@
+// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - -O3 | FileCheck -check-prefix LP64 %s
+// RUN: %clang_cc1 %s -triple=i386-apple-darwin10 -emit-llvm -o - -O3 | FileCheck -check-prefix LP32 %s
+
+// CHECK-LP64: %union.Test1 = type { i32, [4 x i8] }
+union Test1 {
+  int a;
+  int b: 39;
+} t1;
+
+// CHECK-LP64: %union.Test2 = type { i8 }
+union Test2 {
+  int : 6;
+} t2;
+
+// CHECK-LP64: %union.Test3 = type { [2 x i8] }
+union Test3 {
+  int : 9;
+} t3;
+
+
+#define CHECK(x) if (!(x)) return __LINE__
+
+int f() {
+  struct {
+    int a;
+
+    unsigned long long b : 65;
+
+    int c;
+  } c;
+  
+  c.a = 0;
+  c.b = (unsigned long long)-1;
+  c.c = 0;
+
+  CHECK(c.a == 0);
+  CHECK(c.b == (unsigned long long)-1);
+  CHECK(c.c == 0);
+
+// CHECK-LP64: ret i32 0
+// CHECK-LP32: ret i32 0
+  return 0;
+}