1 // REQUIRES: bpf-registered-target
2 // RUN: %clang_cc1 -triple bpf -emit-llvm -debug-info-kind=limited -disable-llvm-passes %s -o - | FileCheck %s
3
4 #define _(x, y) (__builtin_preserve_field_info((x), (y)))
5
6 struct s1 {
7 char a;
8 char b:2;
9 };
10
11 union u1 {
12 char a;
13 char b:2;
14 };
15
unit1(struct s1 * arg)16 unsigned unit1(struct s1 *arg) {
17 return _(arg->a, 10) + _(arg->b, 10);
18 }
19 // CHECK: define dso_local i32 @unit1
20 // CHECK: call ptr @llvm.preserve.struct.access.index.p0.p0(ptr elementtype(%struct.s1) %{{[0-9a-z]+}}, i32 0, i32 0), !dbg !{{[0-9]+}}, !llvm.preserve.access.index ![[STRUCT_S1:[0-9]+]]
21 // CHECK: call i32 @llvm.bpf.preserve.field.info.p0(ptr %{{[0-9a-z]+}}, i64 10), !dbg !{{[0-9]+}}
22 // CHECK: call ptr @llvm.preserve.struct.access.index.p0.p0(ptr elementtype(%struct.s1) %{{[0-9a-z]+}}, i32 1, i32 1), !dbg !{{[0-9]+}}, !llvm.preserve.access.index ![[STRUCT_S1:[0-9]+]]
23 // CHECK: call i32 @llvm.bpf.preserve.field.info.p0(ptr %{{[0-9a-z]+}}, i64 10), !dbg !{{[0-9]+}}
24
unit2(union u1 * arg)25 unsigned unit2(union u1 *arg) {
26 return _(arg->a, 10) + _(arg->b, 10);
27 }
28 // CHECK: define dso_local i32 @unit2
29 // CHECK: call ptr @llvm.preserve.union.access.index.p0.p0(ptr %{{[0-9a-z]+}}, i32 0), !dbg !{{[0-9]+}}, !llvm.preserve.access.index ![[UNION_U1:[0-9]+]]
30 // CHECK: call i32 @llvm.bpf.preserve.field.info.p0(ptr %{{[0-9a-z]+}}, i64 10), !dbg !{{[0-9]+}}
31 // CHECK: call ptr @llvm.preserve.struct.access.index.p0.p0(ptr elementtype(%union.u1) %{{[0-9a-z]+}}, i32 0, i32 1), !dbg !{{[0-9]+}}, !llvm.preserve.access.index ![[UNION_U1:[0-9]+]]
32 // CHECK: call i32 @llvm.bpf.preserve.field.info.p0(ptr %{{[0-9a-z]+}}, i64 10), !dbg !{{[0-9]+}}
33
34 // CHECK: ![[STRUCT_S1]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s1"
35 // CHECK: ![[UNION_U1]] = distinct !DICompositeType(tag: DW_TAG_union_type, name: "u1"
36