ms_bitfield_layout.c
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// RUN: %clang_cc1 -fno-rtti -emit-llvm-only -triple i686-pc-win32 -fms-extensions -fdump-record-layouts %s 2>/dev/null \
// RUN: | FileCheck %s
// RUN: %clang_cc1 -fno-rtti -emit-llvm-only -triple x86_64-pc-win32 -fms-extensions -fdump-record-layouts %s 2>/dev/null \
// RUN: | FileCheck %s
typedef struct A {
char x;
int a : 22;
int : 0;
int c : 10;
char b : 3;
char d: 4;
short y;
} A;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct A
// CHECK-NEXT: 0 | char x
// CHECK-NEXT: 4:0-21 | int a
// CHECK-NEXT: 8:- | int
// CHECK-NEXT: 8:0-9 | int c
// CHECK-NEXT: 12:0-2 | char b
// CHECK-NEXT: 12:3-6 | char d
// CHECK-NEXT: 14 | short y
// CHECK-NEXT: | [sizeof=16, align=4]
typedef struct B {
char x;
int : 0;
short a : 4;
char y;
} B;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct B
// CHECK-NEXT: 0 | char x
// CHECK-NEXT: 1:- | int
// CHECK-NEXT: 2:0-3 | short a
// CHECK-NEXT: 4 | char y
// CHECK-NEXT: | [sizeof=6, align=2]
typedef struct C {
char x;
short a : 4;
int : 0;
char y;
} C;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct C
// CHECK-NEXT: 0 | char x
// CHECK-NEXT: 2:0-3 | short a
// CHECK-NEXT: 4:- | int
// CHECK-NEXT: 4 | char y
// CHECK-NEXT: | [sizeof=8, align=4]
typedef struct D {
char x;
short : 0;
int : 0;
char y;
} D;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct D
// CHECK-NEXT: 0 | char x
// CHECK-NEXT: 1:- | short
// CHECK-NEXT: 1:- | int
// CHECK-NEXT: 1 | char y
// CHECK-NEXT: | [sizeof=2, align=1]
typedef union E {
char x;
long long a : 3;
int b : 3;
long long : 0;
short y;
} E;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | union E
// CHECK-NEXT: 0 | char x
// CHECK-NEXT: 0:0-2 | long long a
// CHECK-NEXT: 0:0-2 | int b
// CHECK-NEXT: 0:- | long long
// CHECK-NEXT: 0 | short
// CHECK-NEXT: | [sizeof=8, align=2]
typedef struct F {
char x;
char a : 3;
char b : 3;
char c : 3;
short d : 6;
short e : 6;
short f : 6;
short g : 11;
short h : 11;
short i : 11;
short y;
} F;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct F
// CHECK-NEXT: 0 | char x
// CHECK-NEXT: 1:0-2 | char a
// CHECK-NEXT: 1:3-5 | char b
// CHECK-NEXT: 2:0-2 | char c
// CHECK-NEXT: 4:0-5 | short d
// CHECK-NEXT: 4:6-11 | short e
// CHECK-NEXT: 6:0-5 | short f
// CHECK-NEXT: 8:0-10 | short g
// CHECK-NEXT:10:0-10 | short h
// CHECK-NEXT:12:0-10 | short i
// CHECK-NEXT: 14 | short y
// CHECK-NEXT: | [sizeof=16, align=2]
typedef union G {
char x;
int a : 3;
int : 0;
long long : 0;
short y;
} G;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | union G
// CHECK-NEXT: 0 | char x
// CHECK-NEXT: 0:0-2 | int a
// CHECK-NEXT: 0:- | int
// CHECK-NEXT: 0:- | long long
// CHECK-NEXT: 0 | short y
// CHECK-NEXT: | [sizeof=4, align=2]
typedef struct H {
unsigned short a : 1;
unsigned char : 0;
unsigned long : 0;
unsigned short c : 1;
} H;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct H
// CHECK-NEXT: 0:0-0 | unsigned short a
// CHECK-NEXT: 2:- | unsigned char
// CHECK-NEXT: 2:- | unsigned long
// CHECK-NEXT: 2:0-0 | unsigned short c
// CHECK-NEXT: | [sizeof=4, align=2]
typedef struct I {
short : 8;
__declspec(align(16)) short : 8;
} I;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct I
// CHECK-NEXT: 0:0-7 | short
// CHECK-NEXT: 1:0-7 | short
// CHECK-NEXT: | [sizeof=2, align=2]
#pragma pack(push, 1)
typedef struct A1 {
char x;
int a : 22;
int : 0;
int c : 10;
char b : 3;
char d: 4;
short y;
} A1;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct A1
// CHECK-NEXT: 0 | char x
// CHECK-NEXT: 1:0-21 | int a
// CHECK-NEXT: 5:- | int
// CHECK-NEXT: 5:0-9 | int c
// CHECK-NEXT: 9:0-2 | char b
// CHECK-NEXT: 9:3-6 | char d
// CHECK-NEXT: 10 | short y
// CHECK-NEXT: | [sizeof=12, align=1]
typedef struct B1 {
char x;
int : 0;
short a : 4;
char y;
} B1;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct B1
// CHECK-NEXT: 0 | char x
// CHECK-NEXT: 1:- | int
// CHECK-NEXT: 1:0-3 | short
// CHECK-NEXT: 3 | char y
// CHECK-NEXT: | [sizeof=4, align=1]
typedef struct C1 {
char x;
short a : 4;
int : 0;
char y;
} C1;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct C1
// CHECK-NEXT: 0 | char x
// CHECK-NEXT: 1:0-3 | short
// CHECK-NEXT: 3:- | int
// CHECK-NEXT: 3 | char y
// CHECK-NEXT: | [sizeof=4, align=1]
typedef struct D1 {
char x;
short : 0;
int : 0;
char y;
} D1;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct D1
// CHECK-NEXT: 0 | char x
// CHECK-NEXT: 1:- | short
// CHECK-NEXT: 1:- | int
// CHECK-NEXT: 1 | char y
// CHECK-NEXT: | [sizeof=2, align=1]
typedef union E1 {
char x;
long long a : 3;
int b : 3;
long long : 0;
short y;
} E1;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | union E1
// CHECK-NEXT: 0 | char x
// CHECK-NEXT: 0:0-2 | long long a
// CHECK-NEXT: 0:0-2 | int b
// CHECK-NEXT: 0:- | long long
// CHECK-NEXT: 0 | short y
// CHECK-NEXT: | [sizeof=8, align=1]
typedef struct F1 {
char x;
char a : 3;
char b : 3;
char c : 3;
short d : 6;
short e : 6;
short f : 6;
short g : 11;
short h : 11;
short i : 11;
short y;
} F1;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct F1
// CHECK-NEXT: 0 | char x
// CHECK-NEXT: 1:0-2 | char a
// CHECK-NEXT: 1:3-5 | char b
// CHECK-NEXT: 2:0-2 | char c
// CHECK-NEXT: 3:0-5 | short d
// CHECK-NEXT: 3:6-11 | short e
// CHECK-NEXT: 5:0-5 | short f
// CHECK-NEXT: 7:0-10 | short g
// CHECK-NEXT: 9:0-10 | short h
// CHECK-NEXT:11:0-10 | short i
// CHECK-NEXT: 13 | short y
// CHECK-NEXT: | [sizeof=15, align=1]
typedef union G1 {
char x;
int a : 3;
int : 0;
long long : 0;
short y;
} G1;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | union G1
// CHECK-NEXT: 0 | char x
// CHECK-NEXT: 0:0-2 | int a
// CHECK-NEXT: 0:- | int
// CHECK-NEXT: 0:- | long long
// CHECK-NEXT: 0 | short y
// CHECK-NEXT: | [sizeof=4, align=1]
typedef struct H1 {
unsigned long a : 1;
unsigned char : 0;
unsigned long : 0;
unsigned long c : 1;
} H1;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct H1
// CHECK-NEXT: 0:0-0 | unsigned long a
// CHECK-NEXT: 4:- | unsigned char
// CHECK-NEXT: 4:- | unsigned long
// CHECK-NEXT: 4:0-0 | unsigned long c
// CHECK-NEXT: | [sizeof=8, align=1]
typedef struct I1 {
short : 8;
__declspec(align(16)) short : 8;
} I1;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct I1
// CHECK-NEXT: 0:0-7 | short
// CHECK-NEXT: 1:0-7 | short
// CHECK-NEXT: | [sizeof=2, align=1]
#pragma pack(pop)
int x[
sizeof(A ) +
sizeof(B ) +
sizeof(C ) +
sizeof(D ) +
sizeof(E ) +
sizeof(F ) +
sizeof(G ) +
sizeof(H ) +
sizeof(I ) +
sizeof(A1) +
sizeof(B1) +
sizeof(C1) +
sizeof(D1) +
sizeof(E1) +
sizeof(F1) +
sizeof(G1) +
sizeof(H1) +
sizeof(I1) +
0];