| Ivan A. Kosarev | da34247 | 2017-11-30 09:26:39 +0000 | [diff] [blame^] | 1 | // RUN: %clang_cc1 -triple x86_64-linux -O1 -disable-llvm-passes %s -emit-llvm -o - | FileCheck %s |
| 2 | // |
| 3 | // Check that we generate correct TBAA information for accesses to union |
| 4 | // members. |
| 5 | |
| 6 | struct X { |
| 7 | int a, b; |
| 8 | int arr[3]; |
| 9 | int c, d; |
| 10 | }; |
| 11 | |
| 12 | union U { |
| 13 | int i; |
| 14 | X x; |
| 15 | int j; |
| 16 | }; |
| 17 | |
| 18 | struct S { |
| 19 | U u, v; |
| 20 | }; |
| 21 | |
| 22 | union N { |
| 23 | int i; |
| 24 | S s; |
| 25 | int j; |
| 26 | }; |
| 27 | |
| 28 | struct R { |
| 29 | N n, m; |
| 30 | }; |
| 31 | |
| 32 | int f1(U *p) { |
| 33 | // CHECK-LABEL: _Z2f1P1U |
| 34 | // CHECK: load i32, i32* {{.*}}, !tbaa [[TAG_U_j:!.*]] |
| 35 | return p->j; |
| 36 | } |
| 37 | |
| 38 | int f2(S *p) { |
| 39 | // CHECK-LABEL: _Z2f2P1S |
| 40 | // CHECK: load i32, i32* {{.*}}, !tbaa [[TAG_S_u_i:!.*]] |
| 41 | return p->u.i; |
| 42 | } |
| 43 | |
| 44 | int f3(S *p) { |
| 45 | // CHECK-LABEL: _Z2f3P1S |
| 46 | // CHECK: load i32, i32* {{.*}}, !tbaa [[TAG_S_v_j:!.*]] |
| 47 | return p->v.j; |
| 48 | } |
| 49 | |
| 50 | int f4(S *p) { |
| 51 | // CHECK-LABEL: _Z2f4P1S |
| 52 | // CHECK: load i32, i32* {{.*}}, !tbaa [[TAG_S_u_x_b:!.*]] |
| 53 | return p->u.x.b; |
| 54 | } |
| 55 | |
| 56 | int f5(S *p) { |
| 57 | // CHECK-LABEL: _Z2f5P1S |
| 58 | // CHECK: load i32, i32* {{.*}}, !tbaa [[TAG_S_v_x_b:!.*]] |
| 59 | return p->v.x.b; |
| 60 | } |
| 61 | |
| 62 | int f6(S *p) { |
| 63 | // CHECK-LABEL: _Z2f6P1S |
| 64 | // CHECK: load i32, i32* {{.*}}, !tbaa [[TAG_S_u_x_arr:!.*]] |
| 65 | return p->u.x.arr[1]; |
| 66 | } |
| 67 | |
| 68 | int f7(S *p) { |
| 69 | // CHECK-LABEL: _Z2f7P1S |
| 70 | // CHECK: load i32, i32* {{.*}}, !tbaa [[TAG_S_v_x_arr:!.*]] |
| 71 | return p->v.x.arr[1]; |
| 72 | } |
| 73 | |
| 74 | int f8(N *p) { |
| 75 | // CHECK-LABEL: _Z2f8P1N |
| 76 | // CHECK: load i32, i32* {{.*}}, !tbaa [[TAG_N_s_v_x_c:!.*]] |
| 77 | return p->s.v.x.c; |
| 78 | } |
| 79 | |
| 80 | int f9(R *p) { |
| 81 | // CHECK-LABEL: _Z2f9P1R |
| 82 | // CHECK: load i32, i32* {{.*}}, !tbaa [[TAG_R_m_s_v_x_c:!.*]] |
| 83 | return p->m.s.v.x.c; |
| 84 | } |
| 85 | |
| 86 | // CHECK-DAG: [[TAG_U_j]] = !{[[TYPE_U:!.*]], [[TYPE_union_member:!.*]], i64 0} |
| 87 | // CHECK-DAG: [[TAG_S_u_i]] = !{[[TYPE_S:!.*]], [[TYPE_union_member]], i64 0} |
| 88 | // CHECK-DAG: [[TAG_S_u_x_b]] = !{[[TYPE_S:!.*]], [[TYPE_union_member]], i64 0} |
| 89 | // CHECK-DAG: [[TAG_S_u_x_arr]] = !{[[TYPE_S:!.*]], [[TYPE_union_member]], i64 0} |
| 90 | // CHECK-DAG: [[TAG_S_v_j]] = !{[[TYPE_S:!.*]], [[TYPE_union_member]], i64 28} |
| 91 | // CHECK-DAG: [[TAG_S_v_x_b]] = !{[[TYPE_S:!.*]], [[TYPE_union_member]], i64 28} |
| 92 | // CHECK-DAG: [[TAG_S_v_x_arr]] = !{[[TYPE_S:!.*]], [[TYPE_union_member]], i64 28} |
| 93 | // CHECK-DAG: [[TAG_N_s_v_x_c]] = !{[[TYPE_N:!.*]], [[TYPE_union_member]], i64 0} |
| 94 | // CHECK-DAG: [[TAG_R_m_s_v_x_c]] = !{[[TYPE_R:!.*]], [[TYPE_union_member]], i64 56} |
| 95 | // CHECK-DAG: [[TYPE_U]] = !{!"_ZTS1U", [[TYPE_union_member]], i64 0} |
| 96 | // CHECK-DAG: [[TYPE_S]] = !{!"_ZTS1S", [[TYPE_U]], i64 0, [[TYPE_U]], i64 28} |
| 97 | // CHECK-DAG: [[TYPE_N]] = !{!"_ZTS1N", [[TYPE_union_member]], i64 0} |
| 98 | // CHECK-DAG: [[TYPE_R]] = !{!"_ZTS1R", [[TYPE_N]], i64 0, [[TYPE_N]], i64 56} |
| 99 | // CHECK-DAG: [[TYPE_union_member]] = !{!"union member", [[TYPE_char:!.*]], i64 0} |
| 100 | // CHECK-DAG: [[TYPE_char]] = !{!"omnipotent char", {{.*}}, i64 0} |