1 // RUN: %clang_cc1 %s -triple=arm64-apple-ios -emit-llvm -o - | FileCheck %s
2 // RUN: %clang_cc1 %s -triple=arm64-apple-ios -emit-llvm -o - | FileCheck -check-prefix=CHECK-GLOBALS %s
3
4 // __cxa_guard_acquire argument is 64-bit
5 // rdar://11540122
6 struct A {
7 A();
8 };
9
f()10 void f() {
11 // CHECK: call i32 @__cxa_guard_acquire(i64*
12 static A a;
13 }
14
15 // ARM64 uses the C++11 definition of POD.
16 // rdar://12650514
17 namespace test1 {
18 // This class is POD in C++11 and cannot have objects allocated in
19 // its tail-padding.
20 struct ABase {};
21 struct A : ABase {
22 int x;
23 char c;
24 };
25
26 struct B : A {
27 char d;
28 };
29
test()30 int test() {
31 return sizeof(B);
32 }
33 // CHECK: define i32 @_ZN5test14testEv()
34 // CHECK: ret i32 12
35 }
36
37 namespace std {
38 class type_info;
39 }
40
41 // ARM64 uses string comparisons for what would otherwise be
42 // default-visibility weak RTTI. rdar://12650568
43 namespace test2 {
44 struct A {
45 virtual void foo();
46 };
foo()47 void A::foo() {}
48 // CHECK-GLOBALS-DAG: @_ZTSN5test21AE = constant [11 x i8]
49 // CHECK-GLOBALS-DAG: @_ZTIN5test21AE = constant { {{.*}}, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @_ZTSN5test21AE, i32 0, i32 0) }
50
51 struct __attribute__((visibility("hidden"))) B {};
52 const std::type_info &b0 = typeid(B);
53 // CHECK-GLOBALS-DAG: @_ZTSN5test21BE = linkonce_odr hidden constant
54 // CHECK-GLOBALS-DAG: @_ZTIN5test21BE = linkonce_odr hidden constant { {{.*}}, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @_ZTSN5test21BE, i32 0, i32 0) }
55
56 const std::type_info &b1 = typeid(B*);
57 // CHECK-GLOBALS-DAG: @_ZTSPN5test21BE = linkonce_odr hidden constant
58 // CHECK-GLOBALS-DAG: @_ZTIPN5test21BE = linkonce_odr hidden constant { {{.*}}, i8* getelementptr inbounds ([12 x i8], [12 x i8]* @_ZTSPN5test21BE, i32 0, i32 0), i32 0, i8* bitcast
59
60 struct C {};
61 const std::type_info &c0 = typeid(C);
62 // CHECK-GLOBALS-DAG: @_ZTSN5test21CE = linkonce_odr hidden constant
63 // CHECK-GLOBALS-DAG: @_ZTIN5test21CE = linkonce_odr hidden constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([11 x i8]* @_ZTSN5test21CE to i64), i64 -9223372036854775808) to i8*) }
64
65 const std::type_info &c1 = typeid(C*);
66 // CHECK-GLOBALS-DAG: @_ZTSPN5test21CE = linkonce_odr hidden constant
67 // CHECK-GLOBALS-DAG: @_ZTIPN5test21CE = linkonce_odr hidden constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([12 x i8]* @_ZTSPN5test21CE to i64), i64 -9223372036854775808) to i8*), i32 0, i8* bitcast
68
69 // This class is explicitly-instantiated, but that instantiation
70 // doesn't guarantee to emit RTTI, so we can still demote the visibility.
71 template <class T> class D {};
72 template class D<int>;
73 const std::type_info &d0 = typeid(D<int>);
74 // CHECK-GLOBALS-DAG: @_ZTSN5test21DIiEE = linkonce_odr hidden constant
75 // CHECK-GLOBALS-DAG: @_ZTIN5test21DIiEE = linkonce_odr hidden constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([14 x i8]* @_ZTSN5test21DIiEE to i64), i64 -9223372036854775808) to i8*) }
76
77 // This class is explicitly-instantiated and *does* guarantee to
78 // emit RTTI, so we're stuck with having to use default visibility.
79 template <class T> class E {
foo()80 virtual void foo() {}
81 };
82 template class E<int>;
83 // CHECK-GLOBALS-DAG: @_ZTSN5test21EIiEE = weak_odr constant [14 x i8]
84 // CHECK-GLOBALS-DAG: @_ZTIN5test21EIiEE = weak_odr constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([14 x i8]* @_ZTSN5test21EIiEE to i64), i64 -9223372036854775808) to i8*) }
85
86 }
87
88 // ARM64 reserves the top half of the vtable offset in virtual
89 // member pointers.
90 namespace test3 {
91 struct A {
92 virtual void foo();
93 virtual void bar();
94 };
95
96 // The offset half of the pointer is still initialized to zero.
97 // CHECK-GLOBALS-DAG: @_ZN5test34mptrE = global { i64, i64 } { i64 0, i64 1 }
98 void (A::*mptr)() = &A::foo;
99
100 // CHECK-LABEL: define void @_ZN5test34testEv()
101 // CHECK: [[TEMP:%.*]] = alloca [[A:.*]], align 8
102 // CHECK: [[MEMPTR:%.*]] = load { i64, i64 }, { i64, i64 }* @_ZN5test34mptrE, align 8
103 // CHECK: [[ADJUST_AND_IS_VIRTUAL:%.*]] = extractvalue { i64, i64 } [[MEMPTR]], 1
104 // CHECK: [[ADJUST:%.*]] = ashr i64 [[ADJUST_AND_IS_VIRTUAL]], 1
105 // CHECK: [[T0:%.*]] = bitcast [[A]]* [[TEMP]] to i8*
106 // CHECK: [[T1:%.*]] = getelementptr inbounds i8, i8* [[T0]], i64 [[ADJUST]]
107 // CHECK: [[ADJUSTED:%.*]] = bitcast i8* [[T1]] to [[A]]*
108 // CHECK: [[MEMBER:%.*]] = extractvalue { i64, i64 } [[MEMPTR]], 0
109 // CHECK: [[T0:%.*]] = and i64 [[ADJUST_AND_IS_VIRTUAL]], 1
110 // CHECK: [[IS_VIRTUAL:%.*]] = icmp ne i64 [[T0]], 0
111 // CHECK: br i1 [[IS_VIRTUAL]],
112 // CHECK: [[T0:%.*]] = bitcast [[A]]* [[ADJUSTED]] to i8**
113 // CHECK: [[VPTR:%.*]] = load i8*, i8** [[T0]], align 8
114 // CHECK: [[TRUNC:%.*]] = trunc i64 [[MEMBER]] to i32
115 // CHECK: [[ZEXT:%.*]] = zext i32 [[TRUNC]] to i64
116 // CHECK: [[T0:%.*]] = getelementptr i8, i8* [[VPTR]], i64 [[ZEXT]]
117 // CHECK: [[T1:%.*]] = bitcast i8* [[T0]] to void ([[A]]*)**
118 // CHECK: load void ([[A]]*)*, void ([[A]]*)** [[T1]],
test()119 void test() {
120 (A().*mptr)();
121 }
122 }
123