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 {{.*}}* 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() 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() 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( 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