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// RUN: %clang_cc1 -Wno-microsoft -fno-rtti -std=c++11 -emit-llvm %s -o - -triple=i386-pc-win32 | FileCheck %s
struct U;
static_assert(sizeof(void (U::*)()) == 2 * sizeof(void*) + 2 * sizeof(int), "");
struct A { int a; };
struct B { int b; };
struct I { union { struct { int a, b; }; }; };
struct S { int a, b; void f(); virtual void g(); };
struct M : A, B { int a, b; void f(); virtual void g(); };
struct V : virtual A { int a, b; void f(); virtual void g(); };
struct U { int a, b; void f(); virtual void g(); };
struct C { virtual void f(); };
struct D { virtual void g(); };
struct O : C, D { virtual void g(); }; // override of non-primary
// Test data member pointers.
template <typename T, int T::*F>
int ReadField(T &o) {
return F ? o.*F : 0;
}
// Redeclare some of the classes so that the implicit attribute goes on the most
// recent redeclaration rather than the definition.
struct V;
void ReadFields() {
A a;
I i;
S s;
M m;
V v;
U u;
ReadField<S, &S::a>(s);
ReadField<M, &M::a>(m);
ReadField<V, &V::a>(v);
ReadField<U, &U::a>(u);
ReadField<S, &S::b>(s);
ReadField<M, &M::b>(m);
ReadField<V, &V::b>(v);
ReadField<U, &U::b>(u);
ReadField<S, nullptr>(s);
ReadField<M, nullptr>(m);
ReadField<V, nullptr>(v);
ReadField<U, nullptr>(u);
// Non-polymorphic null data memptr vs first field memptr.
ReadField<A, &A::a>(a);
ReadField<A, nullptr>(a);
// Indirect fields injected from anonymous unions and structs
ReadField<I, &I::a>(i);
ReadField<I, &I::b>(i);
}
// CHECK-LABEL: define {{.*}}ReadFields
// CHECK: call {{.*}} @"\01??$ReadField@US@@$03@@YAHAAUS@@@Z"
// CHECK: call {{.*}} @"\01??$ReadField@UM@@$0M@@@YAHAAUM@@@Z"
// CHECK: call {{.*}} @"\01??$ReadField@UV@@$F7A@@@YAHAAUV@@@Z"
// CHECK: call {{.*}} @"\01??$ReadField@UU@@$G3A@A@@@YAHAAUU@@@Z"
// CHECK: call {{.*}} @"\01??$ReadField@US@@$07@@YAHAAUS@@@Z"
// CHECK: call {{.*}} @"\01??$ReadField@UM@@$0BA@@@YAHAAUM@@@Z"
// CHECK: call {{.*}} @"\01??$ReadField@UV@@$FM@A@@@YAHAAUV@@@Z"
// CHECK: call {{.*}} @"\01??$ReadField@UU@@$G7A@A@@@YAHAAUU@@@Z"
// MSVC mangles null member pointers in function templates wrong, but it gets
// them right in class templates.
// CHECK: call {{.*}} @"\01??$ReadField@US@@$0A@@@YAHAAUS@@@Z"
// CHECK: call {{.*}} @"\01??$ReadField@UM@@$0A@@@YAHAAUM@@@Z"
// CHECK: call {{.*}} @"\01??$ReadField@UV@@$FA@?0@@YAHAAUV@@@Z"
// CHECK: call {{.*}} @"\01??$ReadField@UU@@$GA@A@?0@@YAHAAUU@@@Z"
// Non-polymorphic null data memptr vs first field memptr. MSVC mangles these
// the same.
// CHECK: call {{.*}} @"\01??$ReadField@UA@@$0A@@@YAHAAUA@@@Z"
// CHECK: call {{.*}} @"\01??$ReadField@UA@@$0?0@@YAHAAUA@@@Z"
// Indirect fields are handled as-if they were simply members of their enclosing
// record.
// CHECK: call {{.*}} @"\01??$ReadField@UI@@$0A@@@YAHAAUI@@@Z"
// CHECK: call {{.*}} @"\01??$ReadField@UI@@$03@@YAHAAUI@@@Z"
// Test member function pointers.
template <typename T, void (T::*MFP)()>
void CallMethod(T &o) {
(o.*MFP)();
}
void CallMethods() {
S s;
M m;
V v;
U u;
O o;
// Non-virtual methods.
CallMethod<S, &S::f>(s);
CallMethod<M, &M::f>(m);
CallMethod<V, &V::f>(v);
CallMethod<U, &U::f>(u);
// Virtual methods requiring thunk mangling.
CallMethod<S, &S::g>(s);
CallMethod<M, &M::g>(m);
CallMethod<V, &V::g>(v);
CallMethod<U, &U::g>(u);
// A member pointer for a non-primary vbase will have a non-zero this
// adjustment.
CallMethod<O, &O::g>(o);
// Null member pointers.
CallMethod<S, nullptr>(s);
CallMethod<M, nullptr>(m);
CallMethod<V, nullptr>(v);
CallMethod<U, nullptr>(u);
}
// CHECK-LABEL: define {{.*}}CallMethods
// CHECK: call {{.*}} @"\01??$CallMethod@US@@$1?f@1@QAEXXZ@@YAXAAUS@@@Z"
// CHECK: call {{.*}} @"\01??$CallMethod@UM@@$H?f@1@QAEXXZA@@@YAXAAUM@@@Z"
// CHECK: call {{.*}} @"\01??$CallMethod@UV@@$I?f@1@QAEXXZA@A@@@YAXAAUV@@@Z"
// CHECK: call {{.*}} @"\01??$CallMethod@UU@@$J?f@1@QAEXXZA@A@A@@@YAXAAUU@@@Z"
// PR17034: MSVC reuses the same thunk for every virtual g method because they
// are all at vftable offset zero. They then mangle the name of the first thunk
// created into the name of the template instantiation, which is definitely a
// bug. We don't follow them here. Instead of ?_91@ backref below, they would
// get ?_9S@@ in every instantiation after the first.
// CHECK: call {{.*}} @"\01??$CallMethod@US@@$1??_91@$BA@AE@@YAXAAUS@@@Z"
// CHECK: call {{.*}} @"\01??$CallMethod@UM@@$H??_91@$BA@AEA@@@YAXAAUM@@@Z"
// CHECK: call {{.*}} @"\01??$CallMethod@UV@@$I??_91@$BA@AEA@A@@@YAXAAUV@@@Z"
// CHECK: call {{.*}} @"\01??$CallMethod@UU@@$J??_91@$BA@AEA@A@A@@@YAXAAUU@@@Z"
// CHECK: call {{.*}} @"\01??$CallMethod@UO@@$H??_91@$BA@AE3@@YAXAAUO@@@Z"
// CHECK: call {{.*}} @"\01??$CallMethod@US@@$0A@@@YAXAAUS@@@Z"
// CHECK: call {{.*}} @"\01??$CallMethod@UM@@$0A@@@YAXAAUM@@@Z"
// CHECK: call {{.*}} @"\01??$CallMethod@UV@@$0A@@@YAXAAUV@@@Z"
// CHECK: call {{.*}} @"\01??$CallMethod@UU@@$0A@@@YAXAAUU@@@Z"
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