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
5 struct 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
15 int s0_align_x = __alignof(((struct s0*)0)->x);
16 int s0_align_y = __alignof(((struct s0*)0)->y);
17 int s0_align = __alignof(struct s0);
18
19 // CHECK-FUNCTIONS-LABEL: define i32 @s0_load_x
20 // CHECK-FUNCTIONS: [[s0_load_x:%.*]] = load i32, i32* {{.*}}, align 4
21 // CHECK-FUNCTIONS: ret i32 [[s0_load_x]]
s0_load_x(struct s0 * a)22 int 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, i32* {{.*}}, align 4
29 // CHECK-FUNCTIONS: ret i32 [[s0_load_y]]
s0_load_y(struct s0 * a)30 int 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)
s0_copy(struct s0 * a,struct s0 * b)33 void s0_copy(struct s0 *a, struct s0 *b) { *b = *a; }
34
35 //
36
37 struct 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
45 int s1_align_x = __alignof(((struct s1*)0)->x);
46 int s1_align_y = __alignof(((struct s1*)0)->y);
47 int s1_align = __alignof(struct s1);
48
49 // CHECK-FUNCTIONS-LABEL: define i32 @s1_load_x
50 // CHECK-FUNCTIONS: [[s1_load_x:%.*]] = load i32, i32* {{.*}}, align 1
51 // CHECK-FUNCTIONS: ret i32 [[s1_load_x]]
s1_load_x(struct s1 * a)52 int 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, i32* {{.*}}, align 1
55 // CHECK-FUNCTIONS: ret i32 [[s1_load_y]]
s1_load_y(struct s1 * a)56 int 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)
s1_copy(struct s1 * a,struct s1 * b)59 void s1_copy(struct s1 *a, struct s1 *b) { *b = *a; }
60
61 //
62
63 #pragma pack(push,2)
64 struct 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
73 int s2_align_x = __alignof(((struct s2*)0)->x);
74 int s2_align_y = __alignof(((struct s2*)0)->y);
75 int s2_align = __alignof(struct s2);
76
77 // CHECK-FUNCTIONS-LABEL: define i32 @s2_load_x
78 // CHECK-FUNCTIONS: [[s2_load_y:%.*]] = load i32, i32* {{.*}}, align 2
79 // CHECK-FUNCTIONS: ret i32 [[s2_load_y]]
s2_load_x(struct s2 * a)80 int 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, i32* {{.*}}, align 2
83 // CHECK-FUNCTIONS: ret i32 [[s2_load_y]]
s2_load_y(struct s2 * a)84 int 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)
s2_copy(struct s2 * a,struct s2 * b)87 void s2_copy(struct s2 *a, struct s2 *b) { *b = *a; }
88
89 struct __attribute__((packed, aligned)) s3 {
90 short aShort;
91 int anInt;
92 };
93 // CHECK-GLOBAL: @s3_1 = global i32 1
94 int s3_1 = __alignof(((struct s3*) 0)->anInt);
95 // CHECK-FUNCTIONS-LABEL: define i32 @test3(
test3(struct s3 * ptr)96 int test3(struct s3 *ptr) {
97 // CHECK-FUNCTIONS: [[PTR:%.*]] = getelementptr inbounds {{%.*}}, {{%.*}}* {{%.*}}, i32 0, i32 1
98 // CHECK-FUNCTIONS-NEXT: load i32, i32* [[PTR]], align 2
99 return ptr->anInt;
100 }
101