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-rw-r--r--clang/test/Sema/pragma-pack-3.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/clang/test/Sema/pragma-pack-3.c b/clang/test/Sema/pragma-pack-3.c
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+++ b/clang/test/Sema/pragma-pack-3.c
@@ -0,0 +1,34 @@
+// RUN: %clang_cc1 -triple i686-apple-darwin9 %s -fsyntax-only -verify
+
+// Stack: [], Alignment: 8
+
+#pragma pack(push, 1)
+// Stack: [8], Alignment: 1
+
+#pragma pack(push, 4)
+// Stack: [8, 1], Alignment: 4
+
+// Note that this differs from gcc; pack() in gcc appears to pop the
+// top stack entry and resets the current alignment. This is both
+// inconsistent with MSVC, and the gcc documentation. In other cases,
+// for example changing this to pack(8), I don't even understand what gcc
+// is doing.
+
+#pragma pack()
+// Stack: [8, 1], Alignment: 8
+
+#pragma pack(pop)
+// Stack: [8], Alignment: 1
+struct s0 {
+ char f0;
+ short f1;
+};
+int a[sizeof(struct s0) == 3 ? 1 : -1];
+
+#pragma pack(pop)
+// Stack: [], Alignment: 8
+struct s1 {
+ char f0;
+ short f1;
+};
+int b[sizeof(struct s1) == 4 ? 1 : -1];