tbaa-struct.cpp revision 5d7a96ce691fbb02d669e4a295162ed8cb3c585d 
1// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -o - -O1 %s | FileCheck %s
2//
3// Check that we generate !tbaa.struct metadata for struct copies.
4struct A {
5  short s;
6  int i;
7  char c;
8  int j;
9};
10
11void copy(struct A *a, struct A *b) {
12  *a = *b;
13}
14
15// CHECK: target datalayout = "{{.*}}p:[[P:64|32]]
16// CHECK: call void @llvm.memcpy.p0i8.p0i8.i[[P]](i8* %{{.*}}, i8* %{{.*}}, i[[P]] 16, i32 4, i1 false), !tbaa.struct [[TS:!.*]]
17
18struct B {
19  char c1;
20  struct A a;
21  int ii;
22};
23
24void copy2(struct B *a, struct B *b) {
25  *a = *b;
26}
27
28// CHECK: call void @llvm.memcpy.p0i8.p0i8.i[[P]](i8* %{{.*}}, i8* %{{.*}}, i[[P]] 24, i32 4, i1 false), !tbaa.struct [[TS2:!.*]]
29
30typedef _Complex int T2;
31typedef _Complex char T5;
32typedef _Complex int T7;
33typedef struct T4 { T5 field0; T7 field1; } T4;
34typedef union T1 { T2 field0; T4 field1; } T1;
35
36void copy3 (T1 *a, T1 *b) {
37  *a = *b;
38}
39
40// CHECK: call void @llvm.memcpy.p0i8.p0i8.i[[P]](i8* %{{.*}}, i8* %{{.*}}, i[[P]] 12, i32 4, i1 false), !tbaa.struct [[TS3:!.*]]
41
42// Make sure that zero-length bitfield works.
43#define ATTR __attribute__ ((ms_struct))
44struct five {
45  char a;
46  int :0;        /* ignored; prior field is not a bitfield. */
47  char b;
48  char c;
49} ATTR;
50void copy4(struct five *a, struct five *b) {
51  *a = *b;
52}
53// CHECK: call void @llvm.memcpy.p0i8.p0i8.i[[P]](i8* %{{.*}}, i8* %{{.*}}, i[[P]] 3, i32 1, i1 false), !tbaa.struct [[TS4:!.*]]
54
55struct six {
56  char a;
57  int :0;
58  char b;
59  char c;
60};
61void copy5(struct six *a, struct six *b) {
62  *a = *b;
63}
64// CHECK: call void @llvm.memcpy.p0i8.p0i8.i[[P]](i8* %{{.*}}, i8* %{{.*}}, i[[P]] 6, i32 1, i1 false), !tbaa.struct [[TS5:!.*]]
65
66// CHECK: [[TS]] = metadata !{i64 0, i64 2, metadata !{{.*}}, i64 4, i64 4, metadata !{{.*}}, i64 8, i64 1, metadata !{{.*}}, i64 12, i64 4, metadata !{{.*}}}
67// CHECK: [[CHAR:!.*]] = metadata !{metadata !"omnipotent char", metadata !{{.*}}}
68// CHECK: [[INT:!.*]] = metadata !{metadata !"int", metadata [[CHAR]]}
69// (offset, size) = (0,1) char; (4,2) short; (8,4) int; (12,1) char; (16,4) int; (20,4) int
70// CHECK: [[TS2]] = metadata !{i64 0, i64 1, metadata !{{.*}}, i64 4, i64 2, metadata !{{.*}}, i64 8, i64 4, metadata !{{.*}}, i64 12, i64 1, metadata !{{.*}}, i64 16, i64 4, metadata {{.*}}, i64 20, i64 4, metadata {{.*}}}
71// (offset, size) = (0,8) char; (0,2) char; (4,8) char
72// CHECK: [[TS3]] = metadata !{i64 0, i64 8, metadata !{{.*}}, i64 0, i64 2, metadata !{{.*}}, i64 4, i64 8, metadata !{{.*}}}
73// CHECK: [[TS4]] = metadata !{i64 0, i64 1, metadata [[CHAR]], i64 1, i64 1, metadata [[CHAR]], i64 2, i64 1, metadata [[CHAR]]}
74// CHECK: [[TS5]] = metadata !{i64 0, i64 1, metadata [[CHAR]], i64 4, i64 4, metadata [[INT]], i64 4, i64 1, metadata [[CHAR]], i64 5, i64 1, metadata [[CHAR]]}
75