1 // RUN: %clang_cc1 -std=c++1z -triple x86_64-linux-gnu -emit-llvm -o - %s | FileCheck %s
2
3 namespace std {
4 using size_t = decltype(sizeof(0));
5 template<typename> struct tuple_size;
6 template<size_t, typename> struct tuple_element;
7 }
8
9 struct Y { int n; };
10 struct X { X(); X(Y); X(const X&); ~X(); };
11
12 struct A { int a : 13; bool b; };
13
14 struct B {};
15 template<> struct std::tuple_size<B> { enum { value = 2 }; };
16 template<> struct std::tuple_element<0,B> { using type = X; };
17 template<> struct std::tuple_element<1,B> { using type = const int&; };
get(B)18 template<int N> auto get(B) {
19 if constexpr (N == 0)
20 return Y();
21 else
22 return 0.0;
23 }
24
25 using C = int[2];
26
27 typedef int D __attribute__((ext_vector_type(2)));
28
29 using E = _Complex int;
30
31 template<typename T> T &make();
32
33 // CHECK: @_ZDC2a12a2E = global {{.*}} zeroinitializer, align 4
34 auto [a1, a2] = make<A>();
35 // CHECK: @_ZDC2b12b2E = global {{.*}} zeroinitializer, align 1
36 // CHECK: @b1 = global {{.*}}* null, align 8
37 // CHECK: @_ZGR2b1_ = internal global {{.*}} zeroinitializer, align 1
38 // CHECK: @b2 = global i32* null, align 8
39 // CHECK: @_ZGR2b2_ = internal global i32 0, align 4
40 auto [b1, b2] = make<B>();
41 // CHECK: @_ZDC2c12c2E = global [2 x i32]* null, align 8
42 auto &[c1, c2] = make<C>();
43 // CHECK: @_ZDC2d12d2E = global <2 x i32> zeroinitializer, align 8
44 auto [d1, d2] = make<D>();
45 // CHECK: @_ZDC2e12e2E = global { i32, i32 } zeroinitializer, align 4
46 auto [e1, e2] = make<E>();
47
48 // CHECK: call {{.*}}* @_Z4makeI1AERT_v()
49 // CHECK: call {{.*}}memcpy{{.*}}@_ZDC2a12a2E
50
51 // CHECK: @_Z4makeI1BERT_v()
52 // CHECK: call i32 @_Z3getILi0EEDa1B()
53 // CHECK: call void @_ZN1XC1E1Y({{.*}}* {{[^,]*}} @_ZGR2b1_, i32
54 // CHECK: call i32 @__cxa_atexit({{.*}}@_ZN1XD1Ev{{.*}}@_ZGR2b1_
55 // CHECK: store {{.*}}* @_ZGR2b1_,
56 //
57 // CHECK: call double @_Z3getILi1EEDa1B()
58 // CHECK: fptosi double %{{.*}} to i32
59 // CHECK: store i32 %{{.*}}, i32* @_ZGR2b2_
60 // CHECK: store i32* @_ZGR2b2_, i32** @b2
61
62 // CHECK: call {{.*}}* @_Z4makeIA2_iERT_v()
63 // CHECK: store {{.*}}, [2 x i32]** @_ZDC2c12c2E
64
65 // CHECK: call {{.*}}* @_Z4makeIDv2_iERT_v()
66 // CHECK: store {{.*}}, <2 x i32>* @_ZDC2d12d2E, align 8
67
68 // CHECK: call {{.*}}* @_Z4makeICiERT_v()
69 // CHECK: store i32 %{{.*}}, i32* getelementptr inbounds ({ i32, i32 }, { i32, i32 }* @_ZDC2e12e2E, i32 0, i32 0)
70 // CHECK: store i32 %{{.*}}, i32* getelementptr inbounds ({ i32, i32 }, { i32, i32 }* @_ZDC2e12e2E, i32 0, i32 1)
71
72 // CHECK: define i32 @_Z12test_globalsv()
test_globals()73 int test_globals() {
74 return a2 + b2 + c2 + d2 + e2;
75 // CHECK: load i8, i8* getelementptr inbounds (%struct.A, %struct.A* @_ZDC2a12a2E, i32 0, i32 1)
76 //
77 // CHECK: %[[b2:.*]] = load i32*, i32** @b2
78 // CHECK: load i32, i32* %[[b2]]
79 //
80 // CHECK: %[[c1c2:.*]] = load [2 x i32]*, [2 x i32]** @_ZDC2c12c2E
81 // CHECK: %[[c2:.*]] = getelementptr inbounds [2 x i32], [2 x i32]* %[[c1c2]], i64 0, i64 1
82 // CHECK: load i32, i32* %[[c2]]
83 //
84 // CHECK: %[[d1d2:.*]] = load <2 x i32>, <2 x i32>* @_ZDC2d12d2E
85 // CHECK: extractelement <2 x i32> %[[d1d2]], i32 1
86 //
87 // CHECK: load i32, i32* getelementptr inbounds ({ i32, i32 }, { i32, i32 }* @_ZDC2e12e2E, i32 0, i32 1)
88 }
89
90 // CHECK: define i32 @_Z11test_localsv()
test_locals()91 int test_locals() {
92 auto [b1, b2] = make<B>();
93
94 // CHECK: @_Z4makeI1BERT_v()
95 // CHECK: call i32 @_Z3getILi0EEDa1B()
96 // CHECK: call void @_ZN1XC1E1Y({{.*}}* {{[^,]*}} %[[b1:.*]], i32
97 //
98 // CHECK: call double @_Z3getILi1EEDa1B()
99 // CHECK: %[[cvt:.*]] = fptosi double %{{.*}} to i32
100 // CHECK: store i32 %[[cvt]], i32* %[[b2:.*]],
101 // CHECK: store i32* %[[b2]], i32** %[[b2ref:.*]],
102
103 return b2;
104 // CHECK: %[[b2:.*]] = load i32*, i32** %[[b2ref]]
105 // CHECK: load i32, i32* %[[b2]]
106
107 // CHECK: call {{.*}}@_ZN1XD1Ev({{.*}}%[[b1]])
108 }
109
110 // CHECK: define void @_Z13test_bitfieldR1A(
test_bitfield(A & a)111 void test_bitfield(A &a) {
112 auto &[a1, a2] = a;
113 a1 = 5;
114 // CHECK: load i16, i16* %[[BITFIELD:.*]],
115 // CHECK: and i16 %{{.*}}, -8192
116 // CHECK: or i16 %{{.*}}, 5
117 // CHECK: store i16 %{{.*}}, i16* %[[BITFIELD]],
118 }
119
120 // CHECK-LABEL: define {{.*}}@_Z18test_static_simple
test_static_simple()121 void test_static_simple() {
122 static auto [x1, x2] = make<A>();
123 // CHECK: load atomic {{.*}}i64* @_ZGVZ18test_static_simplevEDC2x12x2E
124 // CHECK: br i1
125 // CHECK: @__cxa_guard_acquire(
126 // CHECK: call {{.*}} @_Z4makeI1AERT_v(
127 // CHECK: memcpy{{.*}} @_ZZ18test_static_simplevEDC2x12x2E
128 // CHECK: @__cxa_guard_release(
129 }
130
131 // CHECK-LABEL: define {{.*}}@_Z17test_static_tuple
test_static_tuple()132 int test_static_tuple() {
133 // Note that the desugaring specified for this construct requires three
134 // separate guarded initializations. It is possible for an exception to be
135 // thrown after the first initialization and before the second, and if that
136 // happens, we are not permitted to rerun the first initialization, so we
137 // can't combine these into a single guarded initialization in general.
138 static auto [x1, x2] = make<B>();
139
140 // Initialization of the implied variable.
141 // CHECK: load atomic {{.*}} @_ZGVZ17test_static_tuplevEDC2x12x2E
142 // CHECK: br i1
143 // CHECK: @__cxa_guard_acquire({{.*}} @_ZGVZ17test_static_tuplevEDC2x12x2E)
144 // CHECK: call {{.*}} @_Z4makeI1BERT_v(
145 // CHECK: @__cxa_guard_release({{.*}} @_ZGVZ17test_static_tuplevEDC2x12x2E)
146
147 // Initialization of the secret 'x1' variable.
148 // CHECK: load atomic {{.*}} @_ZGVZ17test_static_tuplevE2x1
149 // CHECK: br i1
150 // CHECK: @__cxa_guard_acquire({{.*}} @_ZGVZ17test_static_tuplevE2x1)
151 // CHECK: call {{.*}} @_Z3getILi0EEDa1B(
152 // CHECK: call {{.*}} @_ZN1XC1E1Y({{.*}} @_ZGRZ17test_static_tuplevE2x1_,
153 // CHECK: call {{.*}} @__cxa_atexit({{.*}} @_ZN1XD1Ev {{.*}} @_ZGRZ17test_static_tuplevE2x1_
154 // CHECK: store {{.*}} @_ZGRZ17test_static_tuplevE2x1_, {{.*}} @_ZZ17test_static_tuplevE2x1
155 // CHECK: call void @__cxa_guard_release({{.*}} @_ZGVZ17test_static_tuplevE2x1)
156
157 // Initialization of the secret 'x2' variable.
158 // CHECK: load atomic {{.*}} @_ZGVZ17test_static_tuplevE2x2
159 // CHECK: br i1
160 // CHECK: @__cxa_guard_acquire({{.*}} @_ZGVZ17test_static_tuplevE2x2)
161 // CHECK: call {{.*}} @_Z3getILi1EEDa1B(
162 // CHECK: store {{.*}}, {{.*}} @_ZGRZ17test_static_tuplevE2x2_
163 // CHECK: store {{.*}} @_ZGRZ17test_static_tuplevE2x2_, {{.*}} @_ZZ17test_static_tuplevE2x2
164 // CHECK: call void @__cxa_guard_release({{.*}} @_ZGVZ17test_static_tuplevE2x2)
165
166 struct Inner {
167 // CHECK-LABEL: define {{.*}}@_ZZ17test_static_tuplevEN5Inner1fEv(
168 // FIXME: This first load should be constant-folded to the _ZGV... temporary.
169 // CHECK: load {{.*}} @_ZZ17test_static_tuplevE2x2
170 // CHECK: load
171 // CHECK: ret
172 int f() { return x2; }
173 };
174 return Inner().f();
175 }
176