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&; }; 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 ptr null, align 8 37 // CHECK: @_ZGR2b1_ = internal global {{.*}} zeroinitializer, align 1 38 // CHECK: @b2 ={{.*}} global ptr null, align 8 39 // CHECK: @_ZGR2b2_ = internal global i32 0, align 4 40 auto [b1, b2] = make<B>(); 41 // CHECK: @_ZDC2c12c2E ={{.*}} global ptr 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 {{.*}}ptr @_Z4makeI1AERT_v() 49 // CHECK: call {{.*}}memcpy{{.*}}@_ZDC2a12a2E 50 51 // CHECK: @_Z4makeI1BERT_v() 52 // CHECK: call i32 @_Z3getILi0EEDa1B() 53 // CHECK: call void @_ZN1XC1E1Y(ptr {{[^,]*}} @_ZGR2b1_, i32 54 // CHECK: call i32 @__cxa_atexit({{.*}}@_ZN1XD1Ev{{.*}}@_ZGR2b1_ 55 // CHECK: store ptr @_ZGR2b1_, 56 // 57 // CHECK: call noundef double @_Z3getILi1EEDa1B() 58 // CHECK: fptosi double %{{.*}} to i32 59 // CHECK: store i32 %{{.*}}, ptr @_ZGR2b2_ 60 // CHECK: store ptr @_ZGR2b2_, ptr @b2 61 62 // CHECK: call {{.*}}ptr @_Z4makeIA2_iERT_v() 63 // CHECK: store {{.*}}, ptr @_ZDC2c12c2E 64 65 // CHECK: call {{.*}}ptr @_Z4makeIDv2_iERT_v() 66 // CHECK: store {{.*}}, ptr @_ZDC2d12d2E, align 8 67 68 // CHECK: call {{.*}}ptr @_Z4makeICiERT_v() 69 // CHECK: store i32 %{{.*}}, ptr @_ZDC2e12e2E 70 // CHECK: store i32 %{{.*}}, ptr getelementptr inbounds nuw ({ i32, i32 }, ptr @_ZDC2e12e2E, i32 0, i32 1) 71 72 // CHECK: define{{.*}} i32 @_Z12test_globalsv() 73 int test_globals() { 74 return a2 + b2 + c2 + d2 + e2; 75 // CHECK: load i8, ptr getelementptr inbounds nuw (%struct.A, ptr @_ZDC2a12a2E, i32 0, i32 1) 76 // 77 // CHECK: %[[b2:.*]] = load ptr, ptr @b2 78 // CHECK: load i32, ptr %[[b2]] 79 // 80 // CHECK: %[[c1c2:.*]] = load ptr, ptr @_ZDC2c12c2E 81 // CHECK: %[[c2:.*]] = getelementptr inbounds [2 x i32], ptr %[[c1c2]], i64 0, i64 1 82 // CHECK: load i32, ptr %[[c2]] 83 // 84 // CHECK: %[[d1d2:.*]] = load <2 x i32>, ptr @_ZDC2d12d2E 85 // CHECK: extractelement <2 x i32> %[[d1d2]], i32 1 86 // 87 // CHECK: load i32, ptr getelementptr inbounds nuw ({ i32, i32 }, ptr @_ZDC2e12e2E, i32 0, i32 1) 88 } 89 90 // CHECK: define{{.*}} i32 @_Z11test_localsv() 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(ptr {{[^,]*}} %[[b1:.*]], i32 97 // 98 // CHECK: call noundef double @_Z3getILi1EEDa1B() 99 // CHECK: %[[cvt:.*]] = fptosi double %{{.*}} to i32 100 // CHECK: store i32 %[[cvt]], ptr %[[b2:.*]], 101 // CHECK: store ptr %[[b2]], ptr %[[b2ref:.*]], 102 103 return b2; 104 // CHECK: %[[b2:.*]] = load ptr, ptr %[[b2ref]] 105 // CHECK: load i32, ptr %[[b2]] 106 107 // CHECK: call {{.*}}@_ZN1XD1Ev({{.*}}%[[b1]]) 108 } 109 110 // CHECK: define{{.*}} void @_Z13test_bitfieldR1A( 111 void test_bitfield(A &a) { 112 auto &[a1, a2] = a; 113 a1 = 5; 114 // CHECK: load i16, ptr %[[BITFIELD:.*]], 115 // CHECK: and i16 %{{.*}}, -8192 116 // CHECK: or i16 %{{.*}}, 5 117 // CHECK: store i16 %{{.*}}, ptr %[[BITFIELD]], 118 } 119 120 // CHECK-LABEL: define {{.*}}@_Z18test_static_simple 121 void test_static_simple() { 122 static auto [x1, x2] = make<A>(); 123 // CHECK: load atomic i8, {{.*}}@_ZGVZ18test_static_simplevEDC2x12x2E{{.*}} acquire, align 8 124 // 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 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 i8, {{.*}}@_ZGVZ17test_static_tuplevEDC2x12x2E{{.*}} acquire, align 8 142 // 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 i8, {{.*}}@_ZGVZ17test_static_tuplevE2x1{{.*}} acquire, align 8 149 // 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 i8, {{.*}}@_ZGVZ17test_static_tuplevE2x2{{.*}} acquire, align 8 159 // 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