1 files changed, 30 insertions, 0 deletions
diff --git a/clang/test/SemaCXX/bitfield-layout.cpp b/clang/test/SemaCXX/bitfield-layout.cpp
new file mode 100644
index 0000000..adecf55
--- /dev/null
+++ b/clang/test/SemaCXX/bitfield-layout.cpp
@@ -0,0 +1,30 @@
+// RUN: %clang_cc1 %s -fsyntax-only -verify -triple=x86_64-apple-darwin10
+
+#define CHECK_SIZE(name, size) extern int name##1[sizeof(name) == size ? 1 : -1];
+#define CHECK_ALIGN(name, size) extern int name##2[__alignof(name) == size ? 1 : -1];
+
+// Simple tests.
+struct Test1 {
+  char c : 9; // expected-warning {{size of bit-field 'c' (9 bits) exceeds the size of its type; value will be truncated to 8 bits}}
+};
+CHECK_SIZE(Test1, 2);
+CHECK_ALIGN(Test1, 1);
+
+struct Test2 {
+  char c : 16; // expected-warning {{size of bit-field 'c' (16 bits) exceeds the size of its type; value will be truncated to 8 bits}}
+};
+CHECK_SIZE(Test2, 2);
+CHECK_ALIGN(Test2, 2);
+
+struct Test3 {
+  char c : 32; // expected-warning {{size of bit-field 'c' (32 bits) exceeds the size of its type; value will be truncated to 8 bits}}
+};
+CHECK_SIZE(Test3, 4);
+CHECK_ALIGN(Test3, 4);
+
+struct Test4 {
+  char c : 64; // expected-warning {{size of bit-field 'c' (64 bits) exceeds the size of its type; value will be truncated to 8 bits}}
+};
+CHECK_SIZE(Test4, 8);
+CHECK_ALIGN(Test4, 8);
+