1 // RUN: %clang_cc1 -triple x86_64-unk-unk -emit-llvm -Os -o %t %s
2 // RUN: FileCheck < %t %s
5 unsigned int x[2] __attribute__((packed));
9 unsigned int x[2] __attribute__((packed));
11 unsigned int z __attribute__((packed));
15 unsigned int x[2] __attribute__((packed));
16 unsigned int y __attribute__((packed));
17 unsigned int z __attribute__((packed));
20 struct __attribute__((packed)) s3 {
26 // CHECK: @align0 = global i32 1
27 int align0 = __alignof(struct s0);
28 // CHECK: @align1 = global i32 4
29 int align1 = __alignof(struct s1);
30 // CHECK: @align2 = global i32 1
31 int align2 = __alignof(struct s2);
32 // CHECK: @align3 = global i32 1
33 int align3 = __alignof(struct s3);
35 // CHECK: @align0_x = global i32 1
36 int align0_x = __alignof(((struct s0*) 0)->x);
38 // CHECK: @align1_x = global i32 1
39 int align1_x = __alignof(((struct s1*) 0)->x);
40 // CHECK: @align2_x = global i32 1
41 int align2_x = __alignof(((struct s2*) 0)->x);
42 // CHECK: @align3_x = global i32 1
43 int align3_x = __alignof(((struct s3*) 0)->x);
45 // CHECK: @align0_x0 = global i32 4
46 int align0_x0 = __alignof(((struct s0*) 0)->x[0]);
47 // CHECK: @align1_x0 = global i32 4
48 int align1_x0 = __alignof(((struct s1*) 0)->x[0]);
49 // CHECK: @align2_x0 = global i32 4
50 int align2_x0 = __alignof(((struct s2*) 0)->x[0]);
51 // CHECK: @align3_x0 = global i32 4
52 int align3_x0 = __alignof(((struct s3*) 0)->x[0]);
54 // CHECK-LABEL: define i32 @f0_a
55 // CHECK: load i32, i32* %{{.*}}, align 1
57 // CHECK-LABEL: define i32 @f0_b
58 // CHECK: load i32, i32* %{{.*}}, align 4
60 int f0_a(struct s0 *a) {
63 int f0_b(struct s0 *a) {
67 // Note that we are incompatible with GCC on this example.
69 // CHECK-LABEL: define i32 @f1_a
70 // CHECK: load i32, i32* %{{.*}}, align 1
72 // CHECK-LABEL: define i32 @f1_b
73 // CHECK: load i32, i32* %{{.*}}, align 4
76 // Note that we are incompatible with GCC on this example.
78 // CHECK-LABEL: define i32 @f1_c
79 // CHECK: load i32, i32* %{{.*}}, align 4
81 // CHECK-LABEL: define i32 @f1_d
82 // CHECK: load i32, i32* %{{.*}}, align 1
84 int f1_a(struct s1 *a) {
87 int f1_b(struct s1 *a) {
90 int f1_c(struct s1 *a) {
93 int f1_d(struct s1 *a) {
97 // CHECK-LABEL: define i32 @f2_a
98 // CHECK: load i32, i32* %{{.*}}, align 1
100 // CHECK-LABEL: define i32 @f2_b
101 // CHECK: load i32, i32* %{{.*}}, align 4
103 // CHECK-LABEL: define i32 @f2_c
104 // CHECK: load i32, i32* %{{.*}}, align 1
106 // CHECK-LABEL: define i32 @f2_d
107 // CHECK: load i32, i32* %{{.*}}, align 1
109 int f2_a(struct s2 *a) {
112 int f2_b(struct s2 *a) {
115 int f2_c(struct s2 *a) {
118 int f2_d(struct s2 *a) {
122 // CHECK-LABEL: define i32 @f3_a
123 // CHECK: load i32, i32* %{{.*}}, align 1
125 // CHECK-LABEL: define i32 @f3_b
126 // CHECK: load i32, i32* %{{.*}}, align 4
128 // CHECK-LABEL: define i32 @f3_c
129 // CHECK: load i32, i32* %{{.*}}, align 1
131 // CHECK-LABEL: define i32 @f3_d
132 // CHECK: load i32, i32* %{{.*}}, align 1
134 int f3_a(struct s3 *a) {
137 int f3_b(struct s3 *a) {
140 int f3_c(struct s3 *a) {
143 int f3_d(struct s3 *a) {
147 // Verify we don't claim things are overaligned.
149 // CHECK-LABEL: define double @f4
150 // CHECK: load double, double* {{.*}}, align 8
152 extern double g4[5] __attribute__((aligned(16)));