1// RUN: %clang_cc1 -triple x86_64 -emit-llvm -o - %s | opt -S -strip -o %t
2// RUN: FileCheck --check-prefix=CHECK-GLOBAL < %t %s
3// RUN: FileCheck --check-prefix=CHECK-FUNCTIONS < %t %s
4
5struct s0 {
6  int x;
7  int y __attribute__((packed));
8};
9
10// CHECK-GLOBAL: @s0_align_x = global i32 4
11
12// CHECK-GLOBAL: @s0_align_y = global i32 1
13
14// CHECK-GLOBAL: @s0_align = global i32 4
15int s0_align_x = __alignof(((struct s0*)0)->x);
16int s0_align_y = __alignof(((struct s0*)0)->y);
17int s0_align   = __alignof(struct s0);
18
19// CHECK-FUNCTIONS-LABEL: define i32 @s0_load_x
20// CHECK-FUNCTIONS: [[s0_load_x:%.*]] = load i32* {{.*}}, align 4
21// CHECK-FUNCTIONS: ret i32 [[s0_load_x]]
22int s0_load_x(struct s0 *a) { return a->x; }
23// FIXME: This seems like it should be align 1. This is actually something which
24// has changed in llvm-gcc recently, previously both x and y would be loaded
25// with align 1 (in 2363.1 at least).
26//
27// CHECK-FUNCTIONS-LABEL: define i32 @s0_load_y
28// CHECK-FUNCTIONS: [[s0_load_y:%.*]] = load i32* {{.*}}, align 1
29// CHECK-FUNCTIONS: ret i32 [[s0_load_y]]
30int s0_load_y(struct s0 *a) { return a->y; }
31// CHECK-FUNCTIONS-LABEL: define void @s0_copy
32// CHECK-FUNCTIONS: call void @llvm.memcpy.p0i8.p0i8.i64(i8* {{.*}}, i8* {{.*}}, i64 8, i32 4, i1 false)
33void s0_copy(struct s0 *a, struct s0 *b) { *b = *a; }
34
35//
36
37struct s1 {
38  int x;
39  int y;
40} __attribute__((packed));
41
42// CHECK-GLOBAL: @s1_align_x = global i32 1
43// CHECK-GLOBAL: @s1_align_y = global i32 1
44// CHECK-GLOBAL: @s1_align = global i32 1
45int s1_align_x = __alignof(((struct s1*)0)->x);
46int s1_align_y = __alignof(((struct s1*)0)->y);
47int s1_align   = __alignof(struct s1);
48
49// CHECK-FUNCTIONS-LABEL: define i32 @s1_load_x
50// CHECK-FUNCTIONS: [[s1_load_x:%.*]] = load i32* {{.*}}, align 1
51// CHECK-FUNCTIONS: ret i32 [[s1_load_x]]
52int s1_load_x(struct s1 *a) { return a->x; }
53// CHECK-FUNCTIONS-LABEL: define i32 @s1_load_y
54// CHECK-FUNCTIONS: [[s1_load_y:%.*]] = load i32* {{.*}}, align 1
55// CHECK-FUNCTIONS: ret i32 [[s1_load_y]]
56int s1_load_y(struct s1 *a) { return a->y; }
57// CHECK-FUNCTIONS-LABEL: define void @s1_copy
58// CHECK-FUNCTIONS: call void @llvm.memcpy.p0i8.p0i8.i64(i8* {{.*}}, i8* {{.*}}, i64 8, i32 1, i1 false)
59void s1_copy(struct s1 *a, struct s1 *b) { *b = *a; }
60
61//
62
63#pragma pack(push,2)
64struct s2 {
65  int x;
66  int y;
67};
68#pragma pack(pop)
69
70// CHECK-GLOBAL: @s2_align_x = global i32 2
71// CHECK-GLOBAL: @s2_align_y = global i32 2
72// CHECK-GLOBAL: @s2_align = global i32 2
73int s2_align_x = __alignof(((struct s2*)0)->x);
74int s2_align_y = __alignof(((struct s2*)0)->y);
75int s2_align   = __alignof(struct s2);
76
77// CHECK-FUNCTIONS-LABEL: define i32 @s2_load_x
78// CHECK-FUNCTIONS: [[s2_load_y:%.*]] = load i32* {{.*}}, align 2
79// CHECK-FUNCTIONS: ret i32 [[s2_load_y]]
80int s2_load_x(struct s2 *a) { return a->x; }
81// CHECK-FUNCTIONS-LABEL: define i32 @s2_load_y
82// CHECK-FUNCTIONS: [[s2_load_y:%.*]] = load i32* {{.*}}, align 2
83// CHECK-FUNCTIONS: ret i32 [[s2_load_y]]
84int s2_load_y(struct s2 *a) { return a->y; }
85// CHECK-FUNCTIONS-LABEL: define void @s2_copy
86// CHECK-FUNCTIONS: call void @llvm.memcpy.p0i8.p0i8.i64(i8* {{.*}}, i8* {{.*}}, i64 8, i32 2, i1 false)
87void s2_copy(struct s2 *a, struct s2 *b) { *b = *a; }
88
89struct __attribute__((packed, aligned)) s3 {
90  short aShort;
91  int anInt;
92};
93// CHECK-GLOBAL: @s3_1 = global i32 1
94int s3_1 = __alignof(((struct s3*) 0)->anInt);
95// CHECK-FUNCTIONS-LABEL: define i32 @test3(
96int test3(struct s3 *ptr) {
97  // CHECK-FUNCTIONS:      [[PTR:%.*]] = getelementptr inbounds {{%.*}}* {{%.*}}, i32 0, i32 1
98  // CHECK-FUNCTIONS-NEXT: load i32* [[PTR]], align 1
99  return ptr->anInt;
100}
101