156 lines
5.1 KiB
C++
156 lines
5.1 KiB
C++
// RUN: %clang_cc1 -Wno-microsoft -fno-rtti -std=c++11 -emit-llvm %s -o - -triple=i386-pc-win32 | FileCheck %s
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struct U;
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static_assert(sizeof(void (U::*)()) == 2 * sizeof(void*) + 2 * sizeof(int), "");
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struct A { int a; };
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struct B { int b; };
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struct I { union { struct { int a, b; }; }; };
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struct S { int a, b; void f(); virtual void g(); };
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struct M : A, B { int a, b; void f(); virtual void g(); };
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struct V : virtual A { int a, b; void f(); virtual void g(); };
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struct U { int a, b; void f(); virtual void g(); };
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struct C { virtual void f(); };
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struct D { virtual void g(); };
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struct O : C, D { virtual void g(); }; // override of non-primary
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// Test data member pointers.
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template <typename T, int T::*F>
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int ReadField(T &o) {
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return F ? o.*F : 0;
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}
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// Redeclare some of the classes so that the implicit attribute goes on the most
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// recent redeclaration rather than the definition.
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struct V;
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void ReadFields() {
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A a;
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I i;
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S s;
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M m;
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V v;
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U u;
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ReadField<S, &S::a>(s);
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ReadField<M, &M::a>(m);
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ReadField<V, &V::a>(v);
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ReadField<U, &U::a>(u);
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ReadField<S, &S::b>(s);
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ReadField<M, &M::b>(m);
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ReadField<V, &V::b>(v);
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ReadField<U, &U::b>(u);
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ReadField<S, nullptr>(s);
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ReadField<M, nullptr>(m);
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ReadField<V, nullptr>(v);
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ReadField<U, nullptr>(u);
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// Non-polymorphic null data memptr vs first field memptr.
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ReadField<A, &A::a>(a);
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ReadField<A, nullptr>(a);
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// Indirect fields injected from anonymous unions and structs
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ReadField<I, &I::a>(i);
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ReadField<I, &I::b>(i);
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}
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// CHECK-LABEL: define {{.*}}ReadFields
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// CHECK: call {{.*}} @"??$ReadField@US@@$03@@YAHAAUS@@@Z"
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// CHECK: call {{.*}} @"??$ReadField@UM@@$0M@@@YAHAAUM@@@Z"
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// CHECK: call {{.*}} @"??$ReadField@UV@@$F7A@@@YAHAAUV@@@Z"
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// CHECK: call {{.*}} @"??$ReadField@UU@@$G3A@A@@@YAHAAUU@@@Z"
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// CHECK: call {{.*}} @"??$ReadField@US@@$07@@YAHAAUS@@@Z"
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// CHECK: call {{.*}} @"??$ReadField@UM@@$0BA@@@YAHAAUM@@@Z"
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// CHECK: call {{.*}} @"??$ReadField@UV@@$FM@A@@@YAHAAUV@@@Z"
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// CHECK: call {{.*}} @"??$ReadField@UU@@$G7A@A@@@YAHAAUU@@@Z"
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// MSVC mangles null member pointers in function templates wrong, but it gets
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// them right in class templates.
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// CHECK: call {{.*}} @"??$ReadField@US@@$0A@@@YAHAAUS@@@Z"
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// CHECK: call {{.*}} @"??$ReadField@UM@@$0A@@@YAHAAUM@@@Z"
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// CHECK: call {{.*}} @"??$ReadField@UV@@$0A@@@YAHAAUV@@@Z"
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// CHECK: call {{.*}} @"??$ReadField@UU@@$0A@@@YAHAAUU@@@Z"
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// Non-polymorphic null data memptr vs first field memptr. MSVC mangles these
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// the same.
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// CHECK: call {{.*}} @"??$ReadField@UA@@$0A@@@YAHAAUA@@@Z"
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// CHECK: call {{.*}} @"??$ReadField@UA@@$0?0@@YAHAAUA@@@Z"
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// Indirect fields are handled as-if they were simply members of their enclosing
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// record.
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// CHECK: call {{.*}} @"??$ReadField@UI@@$0A@@@YAHAAUI@@@Z"
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// CHECK: call {{.*}} @"??$ReadField@UI@@$03@@YAHAAUI@@@Z"
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// Test member function pointers.
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template <typename T, void (T::*MFP)()>
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void CallMethod(T &o) {
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(o.*MFP)();
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}
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void CallMethods() {
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S s;
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M m;
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V v;
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U u;
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O o;
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// Non-virtual methods.
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CallMethod<S, &S::f>(s);
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CallMethod<M, &M::f>(m);
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CallMethod<V, &V::f>(v);
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CallMethod<U, &U::f>(u);
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// Virtual methods requiring thunk mangling.
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CallMethod<S, &S::g>(s);
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CallMethod<M, &M::g>(m);
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CallMethod<V, &V::g>(v);
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CallMethod<U, &U::g>(u);
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// A member pointer for a non-primary vbase will have a non-zero this
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// adjustment.
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CallMethod<O, &O::g>(o);
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// Null member pointers.
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CallMethod<S, nullptr>(s);
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CallMethod<M, nullptr>(m);
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CallMethod<V, nullptr>(v);
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CallMethod<U, nullptr>(u);
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}
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// CHECK-LABEL: define {{.*}}CallMethods
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// CHECK: call {{.*}} @"??$CallMethod@US@@$1?f@1@QAEXXZ@@YAXAAUS@@@Z"
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// CHECK: call {{.*}} @"??$CallMethod@UM@@$H?f@1@QAEXXZA@@@YAXAAUM@@@Z"
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// CHECK: call {{.*}} @"??$CallMethod@UV@@$I?f@1@QAEXXZA@A@@@YAXAAUV@@@Z"
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// CHECK: call {{.*}} @"??$CallMethod@UU@@$J?f@1@QAEXXZA@A@A@@@YAXAAUU@@@Z"
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// PR17034: MSVC reuses the same thunk for every virtual g method because they
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// are all at vftable offset zero. They then mangle the name of the first thunk
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// created into the name of the template instantiation, which is definitely a
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// bug. We don't follow them here. Instead of ?_91@ backref below, they would
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// get ?_9S@@ in every instantiation after the first.
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// CHECK: call {{.*}} @"??$CallMethod@US@@$1??_91@$BA@AE@@YAXAAUS@@@Z"
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// CHECK: call {{.*}} @"??$CallMethod@UM@@$H??_91@$BA@AEA@@@YAXAAUM@@@Z"
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// CHECK: call {{.*}} @"??$CallMethod@UV@@$I??_91@$BA@AEA@A@@@YAXAAUV@@@Z"
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// CHECK: call {{.*}} @"??$CallMethod@UU@@$J??_91@$BA@AEA@A@A@@@YAXAAUU@@@Z"
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// CHECK: call {{.*}} @"??$CallMethod@UO@@$H??_91@$BA@AE3@@YAXAAUO@@@Z"
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// CHECK: call {{.*}} @"??$CallMethod@US@@$0A@@@YAXAAUS@@@Z"
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// CHECK: call {{.*}} @"??$CallMethod@UM@@$0A@@@YAXAAUM@@@Z"
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// CHECK: call {{.*}} @"??$CallMethod@UV@@$0A@@@YAXAAUV@@@Z"
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// CHECK: call {{.*}} @"??$CallMethod@UU@@$0A@@@YAXAAUU@@@Z"
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namespace NegativeNVOffset {
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struct A {};
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struct B : virtual A {};
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struct C : B {
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virtual void f();
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};
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}
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template void CallMethod<NegativeNVOffset::C, &NegativeNVOffset::C::f>(NegativeNVOffset::C &);
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// CHECK-LABEL: define {{.*}} @"??$CallMethod@UC@NegativeNVOffset@@$I??_912@$BA@AEPPPPPPPM@A@@@YAXAAUC@NegativeNVOffset@@@Z"
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