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