Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1 | // RUN: %clang_cc1 -std=c++11 -fms-compatibility -fsyntax-only -triple=i386-pc-win32 -verify -DVMB %s |
| 2 | // RUN: %clang_cc1 -std=c++11 -fms-compatibility -fsyntax-only -triple=x86_64-pc-win32 -verify -DVMB %s |
| 3 | // RUN: %clang_cc1 -std=c++11 -fms-compatibility -fsyntax-only -triple=x86_64-pc-win32 -verify -DVMV -fms-memptr-rep=virtual %s |
Reid Kleckner | 84e9ab4 | 2013-03-28 20:02:56 +0000 | [diff] [blame] | 4 | // |
| 5 | // This file should also give no diagnostics when run through cl.exe from MSVS |
| 6 | // 2012, which supports C++11 and static_assert. It should pass for both 64-bit |
| 7 | // and 32-bit x86. |
| 8 | // |
Reid Kleckner | 84e9ab4 | 2013-03-28 20:02:56 +0000 | [diff] [blame] | 9 | // Test the size of various member pointer combinations: |
| 10 | // - complete and incomplete |
| 11 | // - single, multiple, and virtual inheritance (and unspecified for incomplete) |
| 12 | // - data and function pointers |
| 13 | // - templated with declared specializations with annotations |
| 14 | // - template that can be instantiated |
Charles Davis | d18f9f9 | 2010-08-16 04:01:50 +0000 | [diff] [blame] | 15 | |
Reid Kleckner | 84e9ab4 | 2013-03-28 20:02:56 +0000 | [diff] [blame] | 16 | // http://llvm.org/PR12070 |
| 17 | struct Foo { |
| 18 | typedef int Foo::*FooInt; |
| 19 | int f; |
| 20 | }; |
Charles Davis | f231df3 | 2010-08-16 05:30:44 +0000 | [diff] [blame] | 21 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 22 | #ifdef VMB |
Reid Kleckner | 84e9ab4 | 2013-03-28 20:02:56 +0000 | [diff] [blame] | 23 | enum { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 24 | kSingleDataAlign = 1 * sizeof(int), |
| 25 | kSingleFunctionAlign = 1 * sizeof(void *), |
| 26 | kMultipleDataAlign = 1 * sizeof(int), |
| 27 | // Everything with more than 1 field is 8 byte aligned, except virtual data |
| 28 | // member pointers on x64 (ugh). |
| 29 | kMultipleFunctionAlign = 8, |
| 30 | #ifdef _M_X64 |
| 31 | kVirtualDataAlign = 4, |
| 32 | #else |
| 33 | kVirtualDataAlign = 8, |
| 34 | #endif |
| 35 | kVirtualFunctionAlign = 8, |
| 36 | kUnspecifiedDataAlign = 8, |
| 37 | kUnspecifiedFunctionAlign = 8, |
| 38 | |
Reid Kleckner | 84e9ab4 | 2013-03-28 20:02:56 +0000 | [diff] [blame] | 39 | kSingleDataSize = 1 * sizeof(int), |
| 40 | kSingleFunctionSize = 1 * sizeof(void *), |
| 41 | kMultipleDataSize = 1 * sizeof(int), |
| 42 | kMultipleFunctionSize = 2 * sizeof(void *), |
| 43 | kVirtualDataSize = 2 * sizeof(int), |
| 44 | kVirtualFunctionSize = 2 * sizeof(int) + 1 * sizeof(void *), |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 45 | kUnspecifiedDataSize = 3 * sizeof(int), |
| 46 | kUnspecifiedFunctionSize = 2 * sizeof(int) + 2 * sizeof(void *), |
Reid Kleckner | 84e9ab4 | 2013-03-28 20:02:56 +0000 | [diff] [blame] | 47 | }; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 48 | #elif VMV |
| 49 | enum { |
| 50 | // Everything with more than 1 field is 8 byte aligned, except virtual data |
| 51 | // member pointers on x64 (ugh). |
| 52 | #ifdef _M_X64 |
| 53 | kVirtualDataAlign = 4, |
| 54 | #else |
| 55 | kVirtualDataAlign = 8, |
| 56 | #endif |
| 57 | kMultipleDataAlign = kVirtualDataAlign, |
| 58 | kSingleDataAlign = kVirtualDataAlign, |
| 59 | |
| 60 | kUnspecifiedFunctionAlign = 8, |
| 61 | kVirtualFunctionAlign = kUnspecifiedFunctionAlign, |
| 62 | kMultipleFunctionAlign = kUnspecifiedFunctionAlign, |
| 63 | kSingleFunctionAlign = kUnspecifiedFunctionAlign, |
| 64 | |
| 65 | kUnspecifiedDataSize = 3 * sizeof(int), |
| 66 | kVirtualDataSize = kUnspecifiedDataSize, |
| 67 | kMultipleDataSize = kUnspecifiedDataSize, |
| 68 | kSingleDataSize = kUnspecifiedDataSize, |
| 69 | |
| 70 | kUnspecifiedFunctionSize = 2 * sizeof(int) + 2 * sizeof(void *), |
| 71 | kVirtualFunctionSize = kUnspecifiedFunctionSize, |
| 72 | kMultipleFunctionSize = kUnspecifiedFunctionSize, |
| 73 | kSingleFunctionSize = kUnspecifiedFunctionSize, |
| 74 | }; |
| 75 | #else |
| 76 | #error "test doesn't yet support this mode!" |
| 77 | #endif |
Reid Kleckner | 84e9ab4 | 2013-03-28 20:02:56 +0000 | [diff] [blame] | 78 | |
| 79 | // incomplete types |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 80 | #ifdef VMB |
Reid Kleckner | 84e9ab4 | 2013-03-28 20:02:56 +0000 | [diff] [blame] | 81 | class __single_inheritance IncSingle; |
| 82 | class __multiple_inheritance IncMultiple; |
| 83 | class __virtual_inheritance IncVirtual; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 84 | #else |
| 85 | class IncSingle; |
| 86 | class IncMultiple; |
| 87 | class IncVirtual; |
| 88 | #endif |
Reid Kleckner | 84e9ab4 | 2013-03-28 20:02:56 +0000 | [diff] [blame] | 89 | static_assert(sizeof(int IncSingle::*) == kSingleDataSize, ""); |
| 90 | static_assert(sizeof(int IncMultiple::*) == kMultipleDataSize, ""); |
| 91 | static_assert(sizeof(int IncVirtual::*) == kVirtualDataSize, ""); |
| 92 | static_assert(sizeof(void (IncSingle::*)()) == kSingleFunctionSize, ""); |
| 93 | static_assert(sizeof(void (IncMultiple::*)()) == kMultipleFunctionSize, ""); |
| 94 | static_assert(sizeof(void (IncVirtual::*)()) == kVirtualFunctionSize, ""); |
| 95 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 96 | static_assert(__alignof(int IncSingle::*) == kSingleDataAlign, ""); |
| 97 | static_assert(__alignof(int IncMultiple::*) == kMultipleDataAlign, ""); |
| 98 | static_assert(__alignof(int IncVirtual::*) == kVirtualDataAlign, ""); |
| 99 | static_assert(__alignof(void (IncSingle::*)()) == kSingleFunctionAlign, ""); |
| 100 | static_assert(__alignof(void (IncMultiple::*)()) == kMultipleFunctionAlign, ""); |
| 101 | static_assert(__alignof(void (IncVirtual::*)()) == kVirtualFunctionAlign, ""); |
| 102 | |
Reid Kleckner | 84e9ab4 | 2013-03-28 20:02:56 +0000 | [diff] [blame] | 103 | // An incomplete type with an unspecified inheritance model seems to take one |
| 104 | // more slot than virtual. It's not clear what it's used for yet. |
| 105 | class IncUnspecified; |
| 106 | static_assert(sizeof(int IncUnspecified::*) == kUnspecifiedDataSize, ""); |
| 107 | static_assert(sizeof(void (IncUnspecified::*)()) == kUnspecifiedFunctionSize, ""); |
| 108 | |
| 109 | // complete types |
| 110 | struct B1 { }; |
| 111 | struct B2 { }; |
| 112 | struct Single { }; |
| 113 | struct Multiple : B1, B2 { }; |
| 114 | struct Virtual : virtual B1 { }; |
| 115 | static_assert(sizeof(int Single::*) == kSingleDataSize, ""); |
| 116 | static_assert(sizeof(int Multiple::*) == kMultipleDataSize, ""); |
| 117 | static_assert(sizeof(int Virtual::*) == kVirtualDataSize, ""); |
| 118 | static_assert(sizeof(void (Single::*)()) == kSingleFunctionSize, ""); |
| 119 | static_assert(sizeof(void (Multiple::*)()) == kMultipleFunctionSize, ""); |
| 120 | static_assert(sizeof(void (Virtual::*)()) == kVirtualFunctionSize, ""); |
| 121 | |
| 122 | // Test both declared and defined templates. |
| 123 | template <typename T> class X; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 124 | #ifdef VMB |
Reid Kleckner | 84e9ab4 | 2013-03-28 20:02:56 +0000 | [diff] [blame] | 125 | template <> class __single_inheritance X<IncSingle>; |
| 126 | template <> class __multiple_inheritance X<IncMultiple>; |
| 127 | template <> class __virtual_inheritance X<IncVirtual>; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 128 | #else |
| 129 | template <> class X<IncSingle>; |
| 130 | template <> class X<IncMultiple>; |
| 131 | template <> class X<IncVirtual>; |
| 132 | #endif |
Reid Kleckner | 84e9ab4 | 2013-03-28 20:02:56 +0000 | [diff] [blame] | 133 | // Don't declare X<IncUnspecified>. |
| 134 | static_assert(sizeof(int X<IncSingle>::*) == kSingleDataSize, ""); |
| 135 | static_assert(sizeof(int X<IncMultiple>::*) == kMultipleDataSize, ""); |
| 136 | static_assert(sizeof(int X<IncVirtual>::*) == kVirtualDataSize, ""); |
| 137 | static_assert(sizeof(int X<IncUnspecified>::*) == kUnspecifiedDataSize, ""); |
| 138 | static_assert(sizeof(void (X<IncSingle>::*)()) == kSingleFunctionSize, ""); |
| 139 | static_assert(sizeof(void (X<IncMultiple>::*)()) == kMultipleFunctionSize, ""); |
| 140 | static_assert(sizeof(void (X<IncVirtual>::*)()) == kVirtualFunctionSize, ""); |
| 141 | static_assert(sizeof(void (X<IncUnspecified>::*)()) == kUnspecifiedFunctionSize, ""); |
| 142 | |
| 143 | template <typename T> |
| 144 | struct Y : T { }; |
| 145 | static_assert(sizeof(int Y<Single>::*) == kSingleDataSize, ""); |
| 146 | static_assert(sizeof(int Y<Multiple>::*) == kMultipleDataSize, ""); |
| 147 | static_assert(sizeof(int Y<Virtual>::*) == kVirtualDataSize, ""); |
| 148 | static_assert(sizeof(void (Y<Single>::*)()) == kSingleFunctionSize, ""); |
| 149 | static_assert(sizeof(void (Y<Multiple>::*)()) == kMultipleFunctionSize, ""); |
| 150 | static_assert(sizeof(void (Y<Virtual>::*)()) == kVirtualFunctionSize, ""); |
| 151 | |
| 152 | struct A { int x; void bar(); }; |
| 153 | struct B : A { virtual void foo(); }; |
| 154 | static_assert(sizeof(int B::*) == kSingleDataSize, ""); |
| 155 | // A non-primary base class uses the multiple inheritance model for member |
| 156 | // pointers. |
| 157 | static_assert(sizeof(void (B::*)()) == kMultipleFunctionSize, ""); |
| 158 | |
| 159 | struct AA { int x; virtual void foo(); }; |
| 160 | struct BB : AA { void bar(); }; |
| 161 | struct CC : BB { virtual void baz(); }; |
| 162 | static_assert(sizeof(void (CC::*)()) == kSingleFunctionSize, ""); |
| 163 | |
| 164 | // We start out unspecified. |
| 165 | struct ForwardDecl1; |
| 166 | struct ForwardDecl2; |
| 167 | |
| 168 | // Re-declare to force us to iterate decls when adding attributes. |
| 169 | struct ForwardDecl1; |
| 170 | struct ForwardDecl2; |
| 171 | |
| 172 | typedef int ForwardDecl1::*MemPtr1; |
| 173 | typedef int ForwardDecl2::*MemPtr2; |
| 174 | MemPtr1 variable_forces_sizing; |
| 175 | |
| 176 | struct ForwardDecl1 : B { |
| 177 | virtual void foo(); |
| 178 | }; |
| 179 | struct ForwardDecl2 : B { |
| 180 | virtual void foo(); |
| 181 | }; |
| 182 | |
| 183 | static_assert(sizeof(variable_forces_sizing) == kUnspecifiedDataSize, ""); |
| 184 | static_assert(sizeof(MemPtr1) == kUnspecifiedDataSize, ""); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 185 | static_assert(sizeof(MemPtr2) == kSingleDataSize, ""); |
Reid Kleckner | 84e9ab4 | 2013-03-28 20:02:56 +0000 | [diff] [blame] | 186 | |
| 187 | struct MemPtrInBody { |
| 188 | typedef int MemPtrInBody::*MemPtr; |
| 189 | int a; |
| 190 | operator MemPtr() const { |
| 191 | return a ? &MemPtrInBody::a : 0; |
| 192 | } |
| 193 | }; |
| 194 | |
| 195 | static_assert(sizeof(MemPtrInBody::MemPtr) == kSingleDataSize, ""); |
Reid Kleckner | e93e255 | 2013-03-28 23:11:29 +0000 | [diff] [blame] | 196 | |
| 197 | // Passing a member pointer through a template should get the right size. |
| 198 | template<typename T> |
| 199 | struct SingleTemplate; |
| 200 | template<typename T> |
| 201 | struct SingleTemplate<void (T::*)(void)> { |
| 202 | static_assert(sizeof(int T::*) == kSingleDataSize, ""); |
| 203 | static_assert(sizeof(void (T::*)()) == kSingleFunctionSize, ""); |
| 204 | }; |
| 205 | |
| 206 | template<typename T> |
| 207 | struct UnspecTemplate; |
| 208 | template<typename T> |
| 209 | struct UnspecTemplate<void (T::*)(void)> { |
| 210 | static_assert(sizeof(int T::*) == kUnspecifiedDataSize, ""); |
| 211 | static_assert(sizeof(void (T::*)()) == kUnspecifiedFunctionSize, ""); |
| 212 | }; |
| 213 | |
| 214 | struct NewUnspecified; |
| 215 | SingleTemplate<void (IncSingle::*)()> tmpl_single; |
| 216 | UnspecTemplate<void (NewUnspecified::*)()> tmpl_unspec; |
| 217 | |
| 218 | struct NewUnspecified { }; |
| 219 | |
| 220 | static_assert(sizeof(void (NewUnspecified::*)()) == kUnspecifiedFunctionSize, ""); |
| 221 | |
| 222 | template <typename T> |
| 223 | struct MemPtrInTemplate { |
| 224 | // We can't require that the template arg be complete until we're |
| 225 | // instantiated. |
| 226 | int T::*data_ptr; |
| 227 | void (T::*func_ptr)(); |
| 228 | }; |
Eli Friedman | eb82a42 | 2013-06-20 01:35:13 +0000 | [diff] [blame] | 229 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 230 | #ifdef VMB |
Eli Friedman | eb82a42 | 2013-06-20 01:35:13 +0000 | [diff] [blame] | 231 | int Virtual::*CastTest = reinterpret_cast<int Virtual::*>(&AA::x); |
| 232 | // expected-error@-1 {{cannot reinterpret_cast from member pointer type}} |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 233 | #endif |
| 234 | |
| 235 | namespace ErrorTest { |
| 236 | template <typename T, typename U> struct __single_inheritance A; |
| 237 | // expected-warning@-1 {{inheritance model ignored on primary template}} |
| 238 | template <typename T> struct __multiple_inheritance A<T, T>; |
| 239 | // expected-warning@-1 {{inheritance model ignored on partial specialization}} |
| 240 | template <> struct __single_inheritance A<int, float>; |
| 241 | |
| 242 | struct B {}; // expected-note {{B defined here}} |
| 243 | struct __multiple_inheritance B; // expected-error{{inheritance model does not match definition}} |
| 244 | |
| 245 | struct __multiple_inheritance C {}; // expected-error{{inheritance model does not match definition}} |
| 246 | // expected-note@-1 {{C defined here}} |
| 247 | |
| 248 | struct __virtual_inheritance D; |
| 249 | struct D : virtual B {}; |
| 250 | } |
| 251 | #ifdef VMB |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 252 | |
| 253 | namespace PR20017 { |
| 254 | template <typename T> |
| 255 | struct A { |
| 256 | int T::*f(); |
| 257 | }; |
| 258 | |
| 259 | struct B; |
| 260 | |
| 261 | auto a = &A<B>::f; |
| 262 | |
| 263 | struct B {}; |
| 264 | |
| 265 | void q() { |
| 266 | A<B> b; |
| 267 | (b.*a)(); |
| 268 | } |
| 269 | } |
| 270 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 271 | #pragma pointers_to_members(full_generality, multiple_inheritance) |
| 272 | struct TrulySingleInheritance; |
| 273 | static_assert(sizeof(int TrulySingleInheritance::*) == kMultipleDataSize, ""); |
| 274 | #pragma pointers_to_members(best_case) |
| 275 | // This definition shouldn't conflict with the increased generality that the |
| 276 | // multiple_inheritance model gave to TrulySingleInheritance. |
| 277 | struct TrulySingleInheritance {}; |
| 278 | |
| 279 | // Even if a definition proceeds the first mention of a pointer to member, we |
| 280 | // still give the record the fully general representation. |
| 281 | #pragma pointers_to_members(full_generality, virtual_inheritance) |
| 282 | struct SingleInheritanceAsVirtualAfterPragma {}; |
| 283 | static_assert(sizeof(int SingleInheritanceAsVirtualAfterPragma::*) == 12, ""); |
| 284 | |
| 285 | #pragma pointers_to_members(best_case) |
| 286 | |
| 287 | // The above holds even if the pragma comes after the definition. |
| 288 | struct SingleInheritanceAsVirtualBeforePragma {}; |
| 289 | #pragma pointers_to_members(virtual_inheritance) |
| 290 | static_assert(sizeof(int SingleInheritanceAsVirtualBeforePragma::*) == 12, ""); |
| 291 | |
| 292 | #pragma pointers_to_members(single) // expected-error{{unexpected 'single'}} |
| 293 | #endif |