xref: /aosp_15_r20/external/clang/test/Layout/ms_struct-bitfields.c (revision 67e74705e28f6214e480b399dd47ea732279e315) 
1*67e74705SXin Li // RUN: %clang_cc1 -emit-llvm-only -triple armv7-apple-darwin -fdump-record-layouts %s 2>/dev/null \
2*67e74705SXin Li // RUN:            | FileCheck %s
3*67e74705SXin Li 
4*67e74705SXin Li // rdar://22275433
5*67e74705SXin Li 
6*67e74705SXin Li #pragma ms_struct on
7*67e74705SXin Li 
8*67e74705SXin Li union A {
9*67e74705SXin Li   unsigned long long x : 32;
10*67e74705SXin Li   unsigned long long y : 32;
11*67e74705SXin Li } a;
12*67e74705SXin Li // CHECK:*** Dumping AST Record Layout
13*67e74705SXin Li // CHECK-NEXT:        0 | union A
14*67e74705SXin Li // CHECK-NEXT:   0:0-31 |   unsigned long long x
15*67e74705SXin Li // CHECK-NEXT:   0:0-31 |   unsigned long long y
16*67e74705SXin Li // CHECK-NEXT:          | [sizeof=8, align=1]
17*67e74705SXin Li 
18*67e74705SXin Li union B {
19*67e74705SXin Li   __attribute__((aligned(4)))
20*67e74705SXin Li   unsigned long long x : 32;
21*67e74705SXin Li   unsigned long long y : 32;
22*67e74705SXin Li } b;
23*67e74705SXin Li // CHECK:*** Dumping AST Record Layout
24*67e74705SXin Li // CHECK-NEXT:       0 | union B
25*67e74705SXin Li // CHECK-NEXT:  0:0-31 |   unsigned long long x
26*67e74705SXin Li // CHECK-NEXT:  0:0-31 |   unsigned long long y
27*67e74705SXin Li // CHECK-NEXT:         | [sizeof=8, align=1]
28*67e74705SXin Li 
29*67e74705SXin Li union C {
30*67e74705SXin Li   unsigned long long : 0;
31*67e74705SXin Li   unsigned short y : 8;
32*67e74705SXin Li } c;
33*67e74705SXin Li // CHECK:*** Dumping AST Record Layout
34*67e74705SXin Li // CHECK-NEXT:       0 | union C
35*67e74705SXin Li // CHECK-NEXT:     0:- |   unsigned long long
36*67e74705SXin Li // CHECK-NEXT:   0:0-7 |   unsigned short y
37*67e74705SXin Li // CHECK-NEXT:         | [sizeof=2, align=1]
38*67e74705SXin Li 
39*67e74705SXin Li union D {
40*67e74705SXin Li   unsigned long long : 0;
41*67e74705SXin Li   unsigned short : 0;
42*67e74705SXin Li } d;
43*67e74705SXin Li // CHECK:*** Dumping AST Record Layout
44*67e74705SXin Li // CHECK-NEXT:       0 | union D
45*67e74705SXin Li // CHECK-NEXT:     0:- |   unsigned long long
46*67e74705SXin Li // CHECK-NEXT:     0:- |   unsigned short
47*67e74705SXin Li // CHECK-NEXT:         | [sizeof=1, align=1]
48*67e74705SXin Li 
49