hanchenye-llvm-project/clang/test/Sema/pragma-pack-6.c

// RUN: %clang_cc1 -triple i686-apple-darwin9 %s -fsyntax-only -verify
// expected-no-diagnostics

// Pragma pack handling with tag declarations

struct X;

#pragma pack(2)
struct X { int x; };
struct Y;
#pragma pack()

struct Y { int y; };

extern int check[__alignof(struct X) == 2 ? 1 : -1];
extern int check[__alignof(struct Y) == 4 ? 1 : -1];