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| // RUN: %clang_cc1 -std=c++11 -fms-compatibility -fsyntax-only -triple=i386-pc-win32 -verify -DVMB %s
// RUN: %clang_cc1 -std=c++11 -fms-compatibility -fsyntax-only -triple=x86_64-pc-win32 -verify -DVMB %s
// RUN: %clang_cc1 -std=c++11 -fms-compatibility -fsyntax-only -triple=x86_64-pc-win32 -verify -DVMV -fms-memptr-rep=virtual %s
//
// This file should also give no diagnostics when run through cl.exe from MSVS
// 2012, which supports C++11 and static_assert. It should pass for both 64-bit
// and 32-bit x86.
//
// Test the size of various member pointer combinations:
// - complete and incomplete
// - single, multiple, and virtual inheritance (and unspecified for incomplete)
// - data and function pointers
// - templated with declared specializations with annotations
// - template that can be instantiated
// http://llvm.org/PR12070
struct Foo {
typedef int Foo::*FooInt;
int f;
};
#ifdef VMB
enum {
kSingleDataAlign = 1 * sizeof(int),
kSingleFunctionAlign = 1 * sizeof(void *),
kMultipleDataAlign = 1 * sizeof(int),
// Everything with more than 1 field is 8 byte aligned, except virtual data
// member pointers on x64 (ugh).
kMultipleFunctionAlign = 8,
#ifdef _M_X64
kVirtualDataAlign = 4,
#else
kVirtualDataAlign = 8,
#endif
kVirtualFunctionAlign = 8,
kUnspecifiedDataAlign = 8,
kUnspecifiedFunctionAlign = 8,
kSingleDataSize = 1 * sizeof(int),
kSingleFunctionSize = 1 * sizeof(void *),
kMultipleDataSize = 1 * sizeof(int),
kMultipleFunctionSize = 2 * sizeof(void *),
kVirtualDataSize = 2 * sizeof(int),
kVirtualFunctionSize = 2 * sizeof(int) + 1 * sizeof(void *),
kUnspecifiedDataSize = 3 * sizeof(int),
kUnspecifiedFunctionSize = 2 * sizeof(int) + 2 * sizeof(void *),
};
#elif VMV
enum {
// Everything with more than 1 field is 8 byte aligned, except virtual data
// member pointers on x64 (ugh).
#ifdef _M_X64
kVirtualDataAlign = 4,
#else
kVirtualDataAlign = 8,
#endif
kMultipleDataAlign = kVirtualDataAlign,
kSingleDataAlign = kVirtualDataAlign,
kUnspecifiedFunctionAlign = 8,
kVirtualFunctionAlign = kUnspecifiedFunctionAlign,
kMultipleFunctionAlign = kUnspecifiedFunctionAlign,
kSingleFunctionAlign = kUnspecifiedFunctionAlign,
kUnspecifiedDataSize = 3 * sizeof(int),
kVirtualDataSize = kUnspecifiedDataSize,
kMultipleDataSize = kUnspecifiedDataSize,
kSingleDataSize = kUnspecifiedDataSize,
kUnspecifiedFunctionSize = 2 * sizeof(int) + 2 * sizeof(void *),
kVirtualFunctionSize = kUnspecifiedFunctionSize,
kMultipleFunctionSize = kUnspecifiedFunctionSize,
kSingleFunctionSize = kUnspecifiedFunctionSize,
};
#else
#error "test doesn't yet support this mode!"
#endif
// incomplete types
#ifdef VMB
class __single_inheritance IncSingle;
class __multiple_inheritance IncMultiple;
class __virtual_inheritance IncVirtual;
#else
class IncSingle;
class IncMultiple;
class IncVirtual;
#endif
static_assert(sizeof(int IncSingle::*) == kSingleDataSize, "");
static_assert(sizeof(int IncMultiple::*) == kMultipleDataSize, "");
static_assert(sizeof(int IncVirtual::*) == kVirtualDataSize, "");
static_assert(sizeof(void (IncSingle::*)()) == kSingleFunctionSize, "");
static_assert(sizeof(void (IncMultiple::*)()) == kMultipleFunctionSize, "");
static_assert(sizeof(void (IncVirtual::*)()) == kVirtualFunctionSize, "");
static_assert(__alignof(int IncSingle::*) == __alignof(void *), "");
static_assert(__alignof(int IncMultiple::*) == __alignof(void *), "");
static_assert(__alignof(int IncVirtual::*) == __alignof(void *), "");
static_assert(__alignof(void (IncSingle::*)()) == __alignof(void *), "");
static_assert(__alignof(void (IncMultiple::*)()) == __alignof(void *), "");
static_assert(__alignof(void (IncVirtual::*)()) == __alignof(void *), "");
// An incomplete type with an unspecified inheritance model seems to take one
// more slot than virtual.
class IncUnspecified;
static_assert(sizeof(int IncUnspecified::*) == kUnspecifiedDataSize, "");
static_assert(sizeof(void (IncUnspecified::*)()) == kUnspecifiedFunctionSize, "");
// complete types
struct B1 { };
struct B2 { };
struct Single { };
struct Multiple : B1, B2 { };
struct Virtual : virtual B1 { };
static_assert(sizeof(int Single::*) == kSingleDataSize, "");
static_assert(sizeof(int Multiple::*) == kMultipleDataSize, "");
static_assert(sizeof(int Virtual::*) == kVirtualDataSize, "");
static_assert(sizeof(void (Single::*)()) == kSingleFunctionSize, "");
static_assert(sizeof(void (Multiple::*)()) == kMultipleFunctionSize, "");
static_assert(sizeof(void (Virtual::*)()) == kVirtualFunctionSize, "");
// Test both declared and defined templates.
template <typename T> class X;
#ifdef VMB
template <> class __single_inheritance X<IncSingle>;
template <> class __multiple_inheritance X<IncMultiple>;
template <> class __virtual_inheritance X<IncVirtual>;
#else
template <> class X<IncSingle>;
template <> class X<IncMultiple>;
template <> class X<IncVirtual>;
#endif
// Don't declare X<IncUnspecified>.
static_assert(sizeof(int X<IncSingle>::*) == kSingleDataSize, "");
static_assert(sizeof(int X<IncMultiple>::*) == kMultipleDataSize, "");
static_assert(sizeof(int X<IncVirtual>::*) == kVirtualDataSize, "");
static_assert(sizeof(int X<IncUnspecified>::*) == kUnspecifiedDataSize, "");
static_assert(sizeof(void (X<IncSingle>::*)()) == kSingleFunctionSize, "");
static_assert(sizeof(void (X<IncMultiple>::*)()) == kMultipleFunctionSize, "");
static_assert(sizeof(void (X<IncVirtual>::*)()) == kVirtualFunctionSize, "");
static_assert(sizeof(void (X<IncUnspecified>::*)()) == kUnspecifiedFunctionSize, "");
template <typename T>
struct Y : T { };
static_assert(sizeof(int Y<Single>::*) == kSingleDataSize, "");
static_assert(sizeof(int Y<Multiple>::*) == kMultipleDataSize, "");
static_assert(sizeof(int Y<Virtual>::*) == kVirtualDataSize, "");
static_assert(sizeof(void (Y<Single>::*)()) == kSingleFunctionSize, "");
static_assert(sizeof(void (Y<Multiple>::*)()) == kMultipleFunctionSize, "");
static_assert(sizeof(void (Y<Virtual>::*)()) == kVirtualFunctionSize, "");
struct A { int x; void bar(); };
struct B : A { virtual void foo(); };
static_assert(sizeof(int B::*) == kSingleDataSize, "");
// A non-primary base class uses the multiple inheritance model for member
// pointers.
static_assert(sizeof(void (B::*)()) == kMultipleFunctionSize, "");
struct AA { int x; virtual void foo(); };
struct BB : AA { void bar(); };
struct CC : BB { virtual void baz(); };
static_assert(sizeof(void (CC::*)()) == kSingleFunctionSize, "");
// We start out unspecified.
struct ForwardDecl1;
struct ForwardDecl2;
// Re-declare to force us to iterate decls when adding attributes.
struct ForwardDecl1;
struct ForwardDecl2;
typedef int ForwardDecl1::*MemPtr1;
typedef int ForwardDecl2::*MemPtr2;
MemPtr1 variable_forces_sizing;
struct ForwardDecl1 : B {
virtual void foo();
};
struct ForwardDecl2 : B {
virtual void foo();
};
static_assert(sizeof(variable_forces_sizing) == kUnspecifiedDataSize, "");
static_assert(sizeof(MemPtr1) == kUnspecifiedDataSize, "");
static_assert(sizeof(MemPtr2) == kSingleDataSize, "");
struct MemPtrInBody {
typedef int MemPtrInBody::*MemPtr;
int a;
operator MemPtr() const {
return a ? &MemPtrInBody::a : 0;
}
};
static_assert(sizeof(MemPtrInBody::MemPtr) == kSingleDataSize, "");
// Passing a member pointer through a template should get the right size.
template<typename T>
struct SingleTemplate;
template<typename T>
struct SingleTemplate<void (T::*)(void)> {
static_assert(sizeof(int T::*) == kSingleDataSize, "");
static_assert(sizeof(void (T::*)()) == kSingleFunctionSize, "");
};
template<typename T>
struct UnspecTemplate;
template<typename T>
struct UnspecTemplate<void (T::*)(void)> {
static_assert(sizeof(int T::*) == kUnspecifiedDataSize, "");
static_assert(sizeof(void (T::*)()) == kUnspecifiedFunctionSize, "");
};
struct NewUnspecified;
SingleTemplate<void (IncSingle::*)()> tmpl_single;
UnspecTemplate<void (NewUnspecified::*)()> tmpl_unspec;
struct NewUnspecified { };
static_assert(sizeof(void (NewUnspecified::*)()) == kUnspecifiedFunctionSize, "");
template <typename T>
struct MemPtrInTemplate {
// We can't require that the template arg be complete until we're
// instantiated.
int T::*data_ptr;
void (T::*func_ptr)();
};
#ifdef VMB
int Virtual::*CastTest = reinterpret_cast<int Virtual::*>(&AA::x);
// expected-error@-1 {{cannot reinterpret_cast from member pointer type}}
#endif
namespace ErrorTest {
template <typename T, typename U> struct __single_inheritance A;
// expected-warning@-1 {{inheritance model ignored on primary template}}
template <typename T> struct __multiple_inheritance A<T, T>;
// expected-warning@-1 {{inheritance model ignored on partial specialization}}
template <> struct __single_inheritance A<int, float>;
struct B {}; // expected-note {{B defined here}}
struct __multiple_inheritance B; // expected-error{{inheritance model does not match definition}}
struct __multiple_inheritance C {}; // expected-error{{inheritance model does not match definition}}
// expected-note@-1 {{C defined here}}
struct __virtual_inheritance D;
struct D : virtual B {};
}
#ifdef VMB
namespace PR20017 {
template <typename T>
struct A {
int T::*f();
};
struct B;
auto a = &A<B>::f;
struct B {};
void q() {
A<B> b;
(b.*a)();
}
}
#pragma pointers_to_members(full_generality, multiple_inheritance)
struct TrulySingleInheritance;
static_assert(sizeof(int TrulySingleInheritance::*) == kMultipleDataSize, "");
#pragma pointers_to_members(best_case)
// This definition shouldn't conflict with the increased generality that the
// multiple_inheritance model gave to TrulySingleInheritance.
struct TrulySingleInheritance {};
// Even if a definition proceeds the first mention of a pointer to member, we
// still give the record the fully general representation.
#pragma pointers_to_members(full_generality, virtual_inheritance)
struct SingleInheritanceAsVirtualAfterPragma {};
static_assert(sizeof(int SingleInheritanceAsVirtualAfterPragma::*) == 12, "");
#pragma pointers_to_members(best_case)
// The above holds even if the pragma comes after the definition.
struct SingleInheritanceAsVirtualBeforePragma {};
#pragma pointers_to_members(virtual_inheritance)
static_assert(sizeof(int SingleInheritanceAsVirtualBeforePragma::*) == 12, "");
#pragma pointers_to_members(single) // expected-error{{unexpected 'single'}}
#endif
namespace merging {
struct __single_inheritance S;
struct __single_inheritance S;
struct __single_inheritance M; // expected-note{{previous inheritance model specified here}}
struct __multiple_inheritance M; // expected-error{{inheritance model does not match previous declaration}}
}
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