clang/test/CodeGen/builtin-preserve-access-index-typedef.c

   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 #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
  13 int test1(__t *arg) { return arg->a; }
  14 int test2(const __u *arg) { return arg->b; }
  15
  16
  17 // CHECK: define dso_local i32 @test1
  18 // CHECK: call ptr @llvm.preserve.struct.access.index.p0.p0(ptr elementtype(%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 ptr @llvm.preserve.union.access.index.p0.p0(ptr %{{[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"