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.
4 struct A {
5 short s;
6 int i;
7 char c;
8 int j;
9 };
10
copy(struct A * a,struct A * b)11 void copy(struct A *a, struct A *b) {
12 *a = *b;
13 }
14
15 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %{{.*}}, i8* %{{.*}}, i64 16, i32 4, i1 false), !tbaa.struct [[TS:!.*]]
16
17 struct B {
18 char c1;
19 struct A a;
20 int ii;
21 };
22
copy2(struct B * a,struct B * b)23 void copy2(struct B *a, struct B *b) {
24 *a = *b;
25 }
26
27 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %{{.*}}, i8* %{{.*}}, i64 24, i32 4, i1 false), !tbaa.struct [[TS2:!.*]]
28
29 typedef _Complex int T2;
30 typedef _Complex char T5;
31 typedef _Complex int T7;
32 typedef struct T4 { T5 field0; T7 field1; } T4;
33 typedef union T1 { T2 field0; T4 field1; } T1;
34
copy3(T1 * a,T1 * b)35 void copy3 (T1 *a, T1 *b) {
36 *a = *b;
37 }
38
39 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %{{.*}}, i8* %{{.*}}, i64 12, i32 4, i1 false), !tbaa.struct [[TS3:!.*]]
40
41 // Make sure that zero-length bitfield works.
42 #define ATTR __attribute__ ((ms_struct))
43 struct five {
44 char a;
45 int :0; /* ignored; prior field is not a bitfield. */
46 char b;
47 char c;
48 } ATTR;
copy4(struct five * a,struct five * b)49 void copy4(struct five *a, struct five *b) {
50 *a = *b;
51 }
52 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %{{.*}}, i8* %{{.*}}, i64 3, i32 1, i1 false), !tbaa.struct [[TS4:!.*]]
53
54 struct six {
55 char a;
56 int :0;
57 char b;
58 char c;
59 };
copy5(struct six * a,struct six * b)60 void copy5(struct six *a, struct six *b) {
61 *a = *b;
62 }
63 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %{{.*}}, i8* %{{.*}}, i64 6, i32 1, i1 false), !tbaa.struct [[TS5:!.*]]
64
65 // CHECK: [[TS]] = !{i64 0, i64 2, !{{.*}}, i64 4, i64 4, !{{.*}}, i64 8, i64 1, !{{.*}}, i64 12, i64 4, !{{.*}}}
66 // CHECK: [[CHAR:!.*]] = !{!"omnipotent char", !{{.*}}}
67 // CHECK: [[TAG_INT:!.*]] = !{[[INT:!.*]], [[INT]], i64 0}
68 // CHECK: [[INT]] = !{!"int", [[CHAR]]
69 // CHECK: [[TAG_CHAR:!.*]] = !{[[CHAR]], [[CHAR]], i64 0}
70 // (offset, size) = (0,1) char; (4,2) short; (8,4) int; (12,1) char; (16,4) int; (20,4) int
71 // CHECK: [[TS2]] = !{i64 0, i64 1, !{{.*}}, i64 4, i64 2, !{{.*}}, i64 8, i64 4, !{{.*}}, i64 12, i64 1, !{{.*}}, i64 16, i64 4, {{.*}}, i64 20, i64 4, {{.*}}}
72 // (offset, size) = (0,8) char; (0,2) char; (4,8) char
73 // CHECK: [[TS3]] = !{i64 0, i64 8, !{{.*}}, i64 0, i64 2, !{{.*}}, i64 4, i64 8, !{{.*}}}
74 // CHECK: [[TS4]] = !{i64 0, i64 1, [[TAG_CHAR]], i64 1, i64 4, [[TAG_INT]], i64 1, i64 1, [[TAG_CHAR]], i64 2, i64 1, [[TAG_CHAR]]}
75 // CHECK: [[TS5]] = !{i64 0, i64 1, [[TAG_CHAR]], i64 4, i64 4, [[TAG_INT]], i64 4, i64 1, [[TAG_CHAR]], i64 5, i64 1, [[TAG_CHAR]]}
76