// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 5
// RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -std=c++11 -O1 -disable-llvm-passes %s -o - | FileCheck %s

struct alignas(32) F { int x; };

struct S {
  char &a;
  int &b;
  F &c;
};

// CHECK-LABEL: define dso_local void @_Z4testR1S(
// CHECK-SAME: ptr noundef nonnull align 8 dereferenceable(24) [[S:%.*]]) #[[ATTR0:[0-9]+]] {
// CHECK-NEXT:  [[ENTRY:.*:]]
// CHECK-NEXT:    [[S_ADDR:%.*]] = alloca ptr, align 8
// CHECK-NEXT:    store ptr [[S]], ptr [[S_ADDR]], align 8, !tbaa [[TBAA2:![0-9]+]]
// CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr [[S_ADDR]], align 8, !tbaa [[TBAA2]], !nonnull [[META7:![0-9]+]], !align [[META8:![0-9]+]]
// CHECK-NEXT:    [[A:%.*]] = getelementptr inbounds nuw [[STRUCT_S:%.*]], ptr [[TMP0]], i32 0, i32 0
// CHECK-NEXT:    [[TMP1:%.*]] = load ptr, ptr [[A]], align 8, !tbaa [[TBAA9:![0-9]+]], !nonnull [[META7]]
// CHECK-NEXT:    store i8 0, ptr [[TMP1]], align 1, !tbaa [[TBAA14:![0-9]+]]
// CHECK-NEXT:    [[TMP2:%.*]] = load ptr, ptr [[S_ADDR]], align 8, !tbaa [[TBAA2]], !nonnull [[META7]], !align [[META8]]
// CHECK-NEXT:    [[B:%.*]] = getelementptr inbounds nuw [[STRUCT_S]], ptr [[TMP2]], i32 0, i32 1
// CHECK-NEXT:    [[TMP3:%.*]] = load ptr, ptr [[B]], align 8, !tbaa [[TBAA15:![0-9]+]], !nonnull [[META7]], !align [[META16:![0-9]+]]
// CHECK-NEXT:    store i32 0, ptr [[TMP3]], align 4, !tbaa [[TBAA17:![0-9]+]]
// CHECK-NEXT:    [[TMP4:%.*]] = load ptr, ptr [[S_ADDR]], align 8, !tbaa [[TBAA2]], !nonnull [[META7]], !align [[META8]]
// CHECK-NEXT:    [[C:%.*]] = getelementptr inbounds nuw [[STRUCT_S]], ptr [[TMP4]], i32 0, i32 2
// CHECK-NEXT:    [[TMP5:%.*]] = load ptr, ptr [[C]], align 8, !tbaa [[TBAA19:![0-9]+]], !nonnull [[META7]], !align [[META20:![0-9]+]]
// CHECK-NEXT:    [[X:%.*]] = getelementptr inbounds nuw [[STRUCT_F:%.*]], ptr [[TMP5]], i32 0, i32 0
// CHECK-NEXT:    store i32 0, ptr [[X]], align 32, !tbaa [[TBAA21:![0-9]+]]
// CHECK-NEXT:    ret void
//
void test(S &s) {
  s.a = 0;
  s.b = 0;
  s.c.x = 0;
}

struct A { alignas(32) char x[32]; };
struct B : virtual A { long long b; char c; };
extern B& b;
extern B (&bb)[2];
// CHECK-LABEL: define dso_local void @_Z13test_externalv(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT:  [[ENTRY:.*:]]
// CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr @b, align 8, !tbaa [[TBAA23:![0-9]+]], !nonnull [[META7]], !align [[META8]]
// CHECK-NEXT:    [[C:%.*]] = getelementptr inbounds nuw [[STRUCT_B:%.*]], ptr [[TMP0]], i32 0, i32 2
// CHECK-NEXT:    store i8 0, ptr [[C]], align 8, !tbaa [[TBAA25:![0-9]+]]
// CHECK-NEXT:    [[TMP1:%.*]] = load ptr, ptr @bb, align 8, !tbaa [[TBAA23]], !nonnull [[META7]], !align [[META20]]
// CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds [2 x %struct.B], ptr [[TMP1]], i64 0, i64 0
// CHECK-NEXT:    [[C1:%.*]] = getelementptr inbounds nuw [[STRUCT_B]], ptr [[ARRAYIDX]], i32 0, i32 2
// CHECK-NEXT:    store i8 0, ptr [[C1]], align 16, !tbaa [[TBAA25]]
// CHECK-NEXT:    ret void
//
void test_external() {
  b.c = 0; // align 8
  bb[0].c = 0; // align 32
}

// CHECK-LABEL: define dso_local noundef ptr @_Z15test_deref_onlyR1B(
// CHECK-SAME: ptr noundef nonnull align 8 dereferenceable(17) [[S:%.*]]) #[[ATTR0]] {
// CHECK-NEXT:  [[ENTRY:.*:]]
// CHECK-NEXT:    [[S_ADDR:%.*]] = alloca ptr, align 8
// CHECK-NEXT:    store ptr [[S]], ptr [[S_ADDR]], align 8, !tbaa [[TBAA23]]
// CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr [[S_ADDR]], align 8, !tbaa [[TBAA23]], !nonnull [[META7]], !align [[META8]]
// CHECK-NEXT:    [[C:%.*]] = getelementptr inbounds nuw [[STRUCT_B:%.*]], ptr [[TMP0]], i32 0, i32 2
// CHECK-NEXT:    ret ptr [[C]]
//
char* test_deref_only(B &s) {
  return &s.c;
}
//.
// CHECK: [[TBAA2]] = !{[[META3:![0-9]+]], [[META3]], i64 0}
// CHECK: [[META3]] = !{!"p1 _ZTS1S", [[META4:![0-9]+]], i64 0}
// CHECK: [[META4]] = !{!"any pointer", [[META5:![0-9]+]], i64 0}
// CHECK: [[META5]] = !{!"omnipotent char", [[META6:![0-9]+]], i64 0}
// CHECK: [[META6]] = !{!"Simple C++ TBAA"}
// CHECK: [[META7]] = !{}
// CHECK: [[META8]] = !{i64 8}
// CHECK: [[TBAA9]] = !{[[META10:![0-9]+]], [[META11:![0-9]+]], i64 0}
// CHECK: [[META10]] = !{!"_ZTS1S", [[META11]], i64 0, [[META12:![0-9]+]], i64 8, [[META13:![0-9]+]], i64 16}
// CHECK: [[META11]] = !{!"p1 omnipotent char", [[META4]], i64 0}
// CHECK: [[META12]] = !{!"p1 int", [[META4]], i64 0}
// CHECK: [[META13]] = !{!"p1 _ZTS1F", [[META4]], i64 0}
// CHECK: [[TBAA14]] = !{[[META5]], [[META5]], i64 0}
// CHECK: [[TBAA15]] = !{[[META10]], [[META12]], i64 8}
// CHECK: [[META16]] = !{i64 4}
// CHECK: [[TBAA17]] = !{[[META18:![0-9]+]], [[META18]], i64 0}
// CHECK: [[META18]] = !{!"int", [[META5]], i64 0}
// CHECK: [[TBAA19]] = !{[[META10]], [[META13]], i64 16}
// CHECK: [[META20]] = !{i64 32}
// CHECK: [[TBAA21]] = !{[[META22:![0-9]+]], [[META18]], i64 0}
// CHECK: [[META22]] = !{!"_ZTS1F", [[META18]], i64 0}
// CHECK: [[TBAA23]] = !{[[META24:![0-9]+]], [[META24]], i64 0}
// CHECK: [[META24]] = !{!"p1 _ZTS1B", [[META4]], i64 0}
// CHECK: [[TBAA25]] = !{[[META26:![0-9]+]], [[META5]], i64 16}
// CHECK: [[META26]] = !{!"_ZTS1B", [[META27:![0-9]+]], i64 8, [[META5]], i64 16}
// CHECK: [[META27]] = !{!"long long", [[META5]], i64 0}
//.