1 // RUN: %clang_cc1 -Wno-microsoft -fno-rtti -std=c++11 -emit-llvm %s -o - -triple=i386-pc-win32 | FileCheck %s 2 3 struct U; 4 static_assert(sizeof(void (U::*)()) == 2 * sizeof(void*) + 2 * sizeof(int), ""); 5 6 struct A { int a; }; 7 struct B { int b; }; 8 struct I { union { struct { int a, b; }; }; }; 9 10 struct S { int a, b; void f(); virtual void g(); }; 11 struct M : A, B { int a, b; void f(); virtual void g(); }; 12 struct V : virtual A { int a, b; void f(); virtual void g(); }; 13 struct U { int a, b; void f(); virtual void g(); }; 14 15 struct C { virtual void f(); }; 16 struct D { virtual void g(); }; 17 struct O : C, D { virtual void g(); }; // override of non-primary 18 19 // Test data member pointers. 20 template <typename T, int T::*F> 21 int ReadField(T &o) { 22 return F ? o.*F : 0; 23 } 24 25 // Redeclare some of the classes so that the implicit attribute goes on the most 26 // recent redeclaration rather than the definition. 27 struct V; 28 29 void ReadFields() { 30 A a; 31 I i; 32 S s; 33 M m; 34 V v; 35 U u; 36 ReadField<S, &S::a>(s); 37 ReadField<M, &M::a>(m); 38 ReadField<V, &V::a>(v); 39 ReadField<U, &U::a>(u); 40 ReadField<S, &S::b>(s); 41 ReadField<M, &M::b>(m); 42 ReadField<V, &V::b>(v); 43 ReadField<U, &U::b>(u); 44 ReadField<S, nullptr>(s); 45 ReadField<M, nullptr>(m); 46 ReadField<V, nullptr>(v); 47 ReadField<U, nullptr>(u); 48 49 // Non-polymorphic null data memptr vs first field memptr. 50 ReadField<A, &A::a>(a); 51 ReadField<A, nullptr>(a); 52 53 // Indirect fields injected from anonymous unions and structs 54 ReadField<I, &I::a>(i); 55 ReadField<I, &I::b>(i); 56 } 57 58 // CHECK-LABEL: define {{.*}}ReadFields 59 // CHECK: call {{.*}} @"\01??$ReadField@US@@$03@@YAHAAUS@@@Z" 60 // CHECK: call {{.*}} @"\01??$ReadField@UM@@$0M@@@YAHAAUM@@@Z" 61 // CHECK: call {{.*}} @"\01??$ReadField@UV@@$F7A@@@YAHAAUV@@@Z" 62 // CHECK: call {{.*}} @"\01??$ReadField@UU@@$G3A@A@@@YAHAAUU@@@Z" 63 // CHECK: call {{.*}} @"\01??$ReadField@US@@$07@@YAHAAUS@@@Z" 64 // CHECK: call {{.*}} @"\01??$ReadField@UM@@$0BA@@@YAHAAUM@@@Z" 65 // CHECK: call {{.*}} @"\01??$ReadField@UV@@$FM@A@@@YAHAAUV@@@Z" 66 // CHECK: call {{.*}} @"\01??$ReadField@UU@@$G7A@A@@@YAHAAUU@@@Z" 67 68 // MSVC mangles null member pointers in function templates wrong, but it gets 69 // them right in class templates. 70 // CHECK: call {{.*}} @"\01??$ReadField@US@@$0A@@@YAHAAUS@@@Z" 71 // CHECK: call {{.*}} @"\01??$ReadField@UM@@$0A@@@YAHAAUM@@@Z" 72 // CHECK: call {{.*}} @"\01??$ReadField@UV@@$0A@@@YAHAAUV@@@Z" 73 // CHECK: call {{.*}} @"\01??$ReadField@UU@@$0A@@@YAHAAUU@@@Z" 74 75 // Non-polymorphic null data memptr vs first field memptr. MSVC mangles these 76 // the same. 77 // CHECK: call {{.*}} @"\01??$ReadField@UA@@$0A@@@YAHAAUA@@@Z" 78 // CHECK: call {{.*}} @"\01??$ReadField@UA@@$0?0@@YAHAAUA@@@Z" 79 80 // Indirect fields are handled as-if they were simply members of their enclosing 81 // record. 82 // CHECK: call {{.*}} @"\01??$ReadField@UI@@$0A@@@YAHAAUI@@@Z" 83 // CHECK: call {{.*}} @"\01??$ReadField@UI@@$03@@YAHAAUI@@@Z" 84 85 // Test member function pointers. 86 template <typename T, void (T::*MFP)()> 87 void CallMethod(T &o) { 88 (o.*MFP)(); 89 } 90 91 void CallMethods() { 92 S s; 93 M m; 94 V v; 95 U u; 96 O o; 97 98 // Non-virtual methods. 99 CallMethod<S, &S::f>(s); 100 CallMethod<M, &M::f>(m); 101 CallMethod<V, &V::f>(v); 102 CallMethod<U, &U::f>(u); 103 104 // Virtual methods requiring thunk mangling. 105 CallMethod<S, &S::g>(s); 106 CallMethod<M, &M::g>(m); 107 CallMethod<V, &V::g>(v); 108 CallMethod<U, &U::g>(u); 109 110 // A member pointer for a non-primary vbase will have a non-zero this 111 // adjustment. 112 CallMethod<O, &O::g>(o); 113 114 // Null member pointers. 115 CallMethod<S, nullptr>(s); 116 CallMethod<M, nullptr>(m); 117 CallMethod<V, nullptr>(v); 118 CallMethod<U, nullptr>(u); 119 } 120 121 // CHECK-LABEL: define {{.*}}CallMethods 122 // CHECK: call {{.*}} @"\01??$CallMethod@US@@$1?f@1@QAEXXZ@@YAXAAUS@@@Z" 123 // CHECK: call {{.*}} @"\01??$CallMethod@UM@@$H?f@1@QAEXXZA@@@YAXAAUM@@@Z" 124 // CHECK: call {{.*}} @"\01??$CallMethod@UV@@$I?f@1@QAEXXZA@A@@@YAXAAUV@@@Z" 125 // CHECK: call {{.*}} @"\01??$CallMethod@UU@@$J?f@1@QAEXXZA@A@A@@@YAXAAUU@@@Z" 126 127 // PR17034: MSVC reuses the same thunk for every virtual g method because they 128 // are all at vftable offset zero. They then mangle the name of the first thunk 129 // created into the name of the template instantiation, which is definitely a 130 // bug. We don't follow them here. Instead of ?_91@ backref below, they would 131 // get ?_9S@@ in every instantiation after the first. 132 133 // CHECK: call {{.*}} @"\01??$CallMethod@US@@$1??_91@$BA@AE@@YAXAAUS@@@Z" 134 // CHECK: call {{.*}} @"\01??$CallMethod@UM@@$H??_91@$BA@AEA@@@YAXAAUM@@@Z" 135 // CHECK: call {{.*}} @"\01??$CallMethod@UV@@$I??_91@$BA@AEA@A@@@YAXAAUV@@@Z" 136 // CHECK: call {{.*}} @"\01??$CallMethod@UU@@$J??_91@$BA@AEA@A@A@@@YAXAAUU@@@Z" 137 138 // CHECK: call {{.*}} @"\01??$CallMethod@UO@@$H??_91@$BA@AE3@@YAXAAUO@@@Z" 139 140 // CHECK: call {{.*}} @"\01??$CallMethod@US@@$0A@@@YAXAAUS@@@Z" 141 // CHECK: call {{.*}} @"\01??$CallMethod@UM@@$0A@@@YAXAAUM@@@Z" 142 // CHECK: call {{.*}} @"\01??$CallMethod@UV@@$0A@@@YAXAAUV@@@Z" 143 // CHECK: call {{.*}} @"\01??$CallMethod@UU@@$0A@@@YAXAAUU@@@Z" 144 145 namespace NegativeNVOffset { 146 struct A {}; 147 struct B : virtual A {}; 148 struct C : B { 149 virtual void f(); 150 }; 151 } 152 153 template void CallMethod<NegativeNVOffset::C, &NegativeNVOffset::C::f>(NegativeNVOffset::C &); 154 155 // CHECK-LABEL: define {{.*}} @"\01??$CallMethod@UC@NegativeNVOffset@@$I??_912@$BA@AEPPPPPPPM@A@@@YAXAAUC@NegativeNVOffset@@@Z" 156
