1 // REQUIRES: bpf-registered-target
2 // RUN: %clang -target bpf -emit-llvm -S -g %s -o - | FileCheck %s
3
4 #pragma clang attribute push (__attribute__((preserve_access_index)), apply_to = record)
5 typedef struct {
6 int a;
7 } __t;
8 typedef union {
9 int b;
10 } __u;
11 #pragma clang attribute pop
12
test1(__t * arg)13 int test1(__t *arg) { return arg->a; }
test2(const __u * arg)14 int test2(const __u *arg) { return arg->b; }
15
16
17 // CHECK: define dso_local i32 @test1
18 // CHECK: call i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.__ts(%struct.__t* %{{[0-9a-z]+}}, i32 0, i32 0), !dbg !{{[0-9]+}}, !llvm.preserve.access.index ![[TYPEDEF_STRUCT:[0-9]+]]
19 // CHECK: define dso_local i32 @test2
20 // CHECK: call %union.__u* @llvm.preserve.union.access.index.p0s_union.__us.p0s_union.__us(%union.__u* %{{[0-9a-z]+}}, i32 0), !dbg !{{[0-9]+}}, !llvm.preserve.access.index ![[CONST_TYPEDEF:[0-9]+]]
21 //
22 // CHECK: ![[TYPEDEF_STRUCT]] = !DIDerivedType(tag: DW_TAG_typedef, name: "__t"
23 // CHECK: ![[CONST_TYPEDEF]] = !DIDerivedType(tag: DW_TAG_const_type, baseType: ![[TYPEDEF_UNION:[0-9]+]]
24 // CHECK: ![[TYPEDEF_UNION]] = !DIDerivedType(tag: DW_TAG_typedef, name: "__u"
25