// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 6
// 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 [[_ZTS1SPTR_TBAA6:![0-9]+]]
// CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr [[S_ADDR]], align 8, !tbaa [[_ZTS1SPTR_TBAA6]], !nonnull [[META9:![0-9]+]], !align [[META10:![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 [[CHARPTR_TBAA11:![0-9]+]], !nonnull [[META9]]
// CHECK-NEXT:    store i8 0, ptr [[TMP1]], align 1, !tbaa [[CHAR_TBAA16:![0-9]+]]
// CHECK-NEXT:    [[TMP2:%.*]] = load ptr, ptr [[S_ADDR]], align 8, !tbaa [[_ZTS1SPTR_TBAA6]], !nonnull [[META9]], !align [[META10]]
// CHECK-NEXT:    [[B:%.*]] = getelementptr inbounds nuw [[STRUCT_S]], ptr [[TMP2]], i32 0, i32 1
// CHECK-NEXT:    [[TMP3:%.*]] = load ptr, ptr [[B]], align 8, !tbaa [[INTPTR_TBAA17:![0-9]+]], !nonnull [[META9]], !align [[META18:![0-9]+]]
// CHECK-NEXT:    store i32 0, ptr [[TMP3]], align 4, !tbaa [[INT_TBAA19:![0-9]+]]
// CHECK-NEXT:    [[TMP4:%.*]] = load ptr, ptr [[S_ADDR]], align 8, !tbaa [[_ZTS1SPTR_TBAA6]], !nonnull [[META9]], !align [[META10]]
// CHECK-NEXT:    [[C:%.*]] = getelementptr inbounds nuw [[STRUCT_S]], ptr [[TMP4]], i32 0, i32 2
// CHECK-NEXT:    [[TMP5:%.*]] = load ptr, ptr [[C]], align 8, !tbaa [[_ZTS1FPTR_TBAA20:![0-9]+]], !nonnull [[META9]], !align [[META21:![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 [[INT_TBAA22:![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 [[_ZTS1BPTR_TBAA24:![0-9]+]], !nonnull [[META9]], !align [[META10]]
// CHECK-NEXT:    [[C:%.*]] = getelementptr inbounds nuw [[STRUCT_B:%.*]], ptr [[TMP0]], i32 0, i32 2
// CHECK-NEXT:    store i8 0, ptr [[C]], align 8, !tbaa [[CHAR_TBAA26:![0-9]+]]
// CHECK-NEXT:    [[TMP1:%.*]] = load ptr, ptr @bb, align 8, !tbaa [[_ZTS1BPTR_TBAA24]], !nonnull [[META9]], !align [[META21]]
// 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 [[CHAR_TBAA26]]
// 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 [[_ZTS1BPTR_TBAA24]]
// CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr [[S_ADDR]], align 8, !tbaa [[_ZTS1BPTR_TBAA24]], !nonnull [[META9]], !align [[META10]]
// 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: [[META3:![0-9]+]] = !{!"int", [[META4:![0-9]+]], i64 0}
// CHECK: [[META4]] = !{!"omnipotent char", [[META5:![0-9]+]], i64 0}
// CHECK: [[META5]] = !{!"Simple C++ TBAA"}
// CHECK: [[_ZTS1SPTR_TBAA6]] = !{[[META7:![0-9]+]], [[META7]], i64 0}
// CHECK: [[META7]] = !{!"p1 _ZTS1S", [[META8:![0-9]+]], i64 0}
// CHECK: [[META8]] = !{!"any pointer", [[META4]], i64 0}
// CHECK: [[META9]] = !{}
// CHECK: [[META10]] = !{i64 8}
// CHECK: [[CHARPTR_TBAA11]] = !{[[META12:![0-9]+]], [[META13:![0-9]+]], i64 0}
// CHECK: [[META12]] = !{!"_ZTS1S", [[META13]], i64 0, [[META14:![0-9]+]], i64 8, [[META15:![0-9]+]], i64 16}
// CHECK: [[META13]] = !{!"p1 omnipotent char", [[META8]], i64 0}
// CHECK: [[META14]] = !{!"p1 int", [[META8]], i64 0}
// CHECK: [[META15]] = !{!"p1 _ZTS1F", [[META8]], i64 0}
// CHECK: [[CHAR_TBAA16]] = !{[[META4]], [[META4]], i64 0}
// CHECK: [[INTPTR_TBAA17]] = !{[[META12]], [[META14]], i64 8}
// CHECK: [[META18]] = !{i64 4}
// CHECK: [[INT_TBAA19]] = !{[[META3]], [[META3]], i64 0}
// CHECK: [[_ZTS1FPTR_TBAA20]] = !{[[META12]], [[META15]], i64 16}
// CHECK: [[META21]] = !{i64 32}
// CHECK: [[INT_TBAA22]] = !{[[META23:![0-9]+]], [[META3]], i64 0}
// CHECK: [[META23]] = !{!"_ZTS1F", [[META3]], i64 0}
// CHECK: [[_ZTS1BPTR_TBAA24]] = !{[[META25:![0-9]+]], [[META25]], i64 0}
// CHECK: [[META25]] = !{!"p1 _ZTS1B", [[META8]], i64 0}
// CHECK: [[CHAR_TBAA26]] = !{[[META27:![0-9]+]], [[META4]], i64 16}
// CHECK: [[META27]] = !{!"_ZTS1B", [[META28:![0-9]+]], i64 8, [[META4]], i64 16}
// CHECK: [[META28]] = !{!"long long", [[META4]], i64 0}
//.