1 // RUN: %clang_cc1 -std=c++11 -Wno-uninitialized -fno-rtti -emit-llvm %s -o - -triple=i386-pc-win32 -fms-extensions | FileCheck %s
2 // RUN: %clang_cc1 -std=c++11 -Wno-uninitialized -fno-rtti -emit-llvm %s -o - -triple=x86_64-pc-win32 -fms-extensions | FileCheck %s -check-prefix=X64
3 // RUN: %clang_cc1 -std=c++11 -Wno-uninitialized -fno-rtti -emit-llvm %s -o - -triple=i386-pc-win32 -DINCOMPLETE_VIRTUAL -fms-extensions -verify
4 // RUN: %clang_cc1 -std=c++11 -Wno-uninitialized -fno-rtti -emit-llvm %s -o - -triple=i386-pc-win32 -DINCOMPLETE_VIRTUAL -DMEMFUN -fms-extensions -verify
5 
6 struct PR26313_Y;
7 typedef void (PR26313_Y::*PR26313_FUNC)();
8 struct PR26313_X {
9   PR26313_FUNC *ptr;
10   PR26313_X();
11 };
12 PR26313_X::PR26313_X() {}
13 void PR26313_f(PR26313_FUNC *p) { delete p; }
14 
15 struct PR26313_Z;
16 int PR26313_Z::**a = nullptr;
17 int PR26313_Z::*b = *a;
18 // CHECK-DAG: @"\01?a@@3PAPQPR26313_Z@@HA" = global %0* null, align 4
19 // CHECK-DAG: @"\01?b@@3PQPR26313_Z@@HQ1@" = global { i32, i32, i32 } { i32 0, i32 0, i32 -1 }, align 4
20 
21 namespace PR20947 {
22 struct A;
23 int A::**a = nullptr;
24 // CHECK-DAG: @"\01?a@PR20947@@3PAPQA@1@HA" = global %{{.*}}* null, align 4
25 
26 struct B;
27 int B::*&b = b;
28 // CHECK-DAG: @"\01?b@PR20947@@3AAPQB@1@HA" = global %{{.*}}* null, align 4
29 }
30 
31 namespace PR20017 {
32 template <typename T>
33 struct A {
34   int T::*m_fn1() { return nullptr; }
35 };
36 struct B;
37 auto a = &A<B>::m_fn1;
38 // CHECK-DAG: @"\01?a@PR20017@@3P8?$A@UB@PR20017@@@1@AEPQB@1@HXZQ21@" = global i8* bitcast ({ i32, i32, i32 } ({{.*}}*)* @"\01?m_fn1@?$A@UB@PR20017@@@PR20017@@QAEPQB@2@HXZ" to i8*), align 4
39 }
40 
41 #ifndef INCOMPLETE_VIRTUAL
42 struct B1 {
43   void foo();
44   int b;
45 };
46 struct B2 {
47   int b2;
48   void foo();
49 };
50 struct Single : B1 {
51   void foo();
52 };
53 struct Multiple : B1, B2 {
54   int m;
55   void foo();
56 };
57 struct Virtual : virtual B1 {
58   int v;
59   void foo();
60 };
61 
62 struct POD {
63   int a;
64   int b;
65 };
66 
67 struct Polymorphic {
68   virtual void myVirtual();
69   int a;
70   int b;
71 };
72 
73 // This class uses the virtual inheritance model, yet its vbptr offset is not 0.
74 // We still use zero for the null field offset, despite it being a valid field
75 // offset.
76 struct NonZeroVBPtr : POD, Virtual {
77   int n;
78   void foo();
79 };
80 
81 struct Unspecified;
82 struct UnspecSingle;
83 
84 // Check that we can lower the LLVM types and get the null initializers right.
85 int Single     ::*s_d_memptr;
86 int Polymorphic::*p_d_memptr;
87 int Multiple   ::*m_d_memptr;
88 int Virtual    ::*v_d_memptr;
89 int NonZeroVBPtr::*n_d_memptr;
90 int Unspecified::*u_d_memptr;
91 int UnspecSingle::*us_d_memptr;
92 // CHECK: @"\01?s_d_memptr@@3PQSingle@@HQ1@" = global i32 -1, align 4
93 // CHECK: @"\01?p_d_memptr@@3PQPolymorphic@@HQ1@" = global i32 0, align 4
94 // CHECK: @"\01?m_d_memptr@@3PQMultiple@@HQ1@" = global i32 -1, align 4
95 // CHECK: @"\01?v_d_memptr@@3PQVirtual@@HQ1@" = global { i32, i32 }
96 // CHECK:   { i32 0, i32 -1 }, align 4
97 // CHECK: @"\01?n_d_memptr@@3PQNonZeroVBPtr@@HQ1@" = global { i32, i32 }
98 // CHECK:   { i32 0, i32 -1 }, align 4
99 // CHECK: @"\01?u_d_memptr@@3PQUnspecified@@HQ1@" = global { i32, i32, i32 }
100 // CHECK:   { i32 0, i32 0, i32 -1 }, align 4
101 // CHECK: @"\01?us_d_memptr@@3PQUnspecSingle@@HQ1@" = global { i32, i32, i32 }
102 // CHECK:   { i32 0, i32 0, i32 -1 }, align 4
103 
104 void (Single  ::*s_f_memptr)();
105 void (Multiple::*m_f_memptr)();
106 void (Virtual ::*v_f_memptr)();
107 // CHECK: @"\01?s_f_memptr@@3P8Single@@AEXXZQ1@" = global i8* null, align 4
108 // CHECK: @"\01?m_f_memptr@@3P8Multiple@@AEXXZQ1@" = global { i8*, i32 } zeroinitializer, align 4
109 // CHECK: @"\01?v_f_memptr@@3P8Virtual@@AEXXZQ1@" = global { i8*, i32, i32 } zeroinitializer, align 4
110 
111 // We can define Unspecified after locking in the inheritance model.
112 struct Unspecified : Multiple, Virtual {
113   void foo();
114   int u;
115 };
116 
117 struct UnspecSingle {
118   void foo();
119 };
120 
121 // Test memptr emission in a constant expression.
122 namespace Const {
123 void (Single     ::*s_f_mp)() = &Single::foo;
124 void (Multiple   ::*m_f_mp)() = &B2::foo;
125 void (Virtual    ::*v_f_mp)() = &Virtual::foo;
126 void (Unspecified::*u_f_mp)() = &Unspecified::foo;
127 void (UnspecSingle::*us_f_mp)() = &UnspecSingle::foo;
128 // CHECK: @"\01?s_f_mp@Const@@3P8Single@@AEXXZQ2@" =
129 // CHECK:   global i8* bitcast ({{.*}} @"\01?foo@Single@@QAEXXZ" to i8*), align 4
130 // CHECK: @"\01?m_f_mp@Const@@3P8Multiple@@AEXXZQ2@" =
131 // CHECK:   global { i8*, i32 } { i8* bitcast ({{.*}} @"\01?foo@B2@@QAEXXZ" to i8*), i32 4 }, align 4
132 // CHECK: @"\01?v_f_mp@Const@@3P8Virtual@@AEXXZQ2@" =
133 // CHECK:   global { i8*, i32, i32 } { i8* bitcast ({{.*}} @"\01?foo@Virtual@@QAEXXZ" to i8*), i32 0, i32 0 }, align 4
134 // CHECK: @"\01?u_f_mp@Const@@3P8Unspecified@@AEXXZQ2@" =
135 // CHECK:   global { i8*, i32, i32, i32 } { i8* bitcast ({{.*}} @"\01?foo@Unspecified@@QAEXXZ" to i8*), i32 0, i32 0, i32 0 }, align 4
136 // CHECK: @"\01?us_f_mp@Const@@3P8UnspecSingle@@AEXXZQ2@" =
137 // CHECK:   global { i8*, i32, i32, i32 } { i8* bitcast ({{.*}} @"\01?foo@UnspecSingle@@QAEXXZ" to i8*), i32 0, i32 0, i32 0 }, align 4
138 }
139 
140 namespace CastParam {
141 // This exercises ConstExprEmitter instead of ValueDecl::evaluateValue.  The
142 // extra reinterpret_cast for the parameter type requires more careful folding.
143 // FIXME: Or does it?  If reinterpret_casts are no-ops, we should be able to
144 // strip them in evaluateValue() and just proceed as normal with an APValue.
145 struct A {
146   int a;
147   void foo(A *p);
148 };
149 struct B { int b; };
150 struct C : B, A { int c; };
151 
152 void (A::*ptr1)(void *) = (void (A::*)(void *)) &A::foo;
153 // CHECK: @"\01?ptr1@CastParam@@3P8A@1@AEXPAX@ZQ21@" =
154 // CHECK:   global i8* bitcast (void ({{.*}})* @"\01?foo@A@CastParam@@QAEXPAU12@@Z" to i8*), align 4
155 
156 // Try a reinterpret_cast followed by a memptr conversion.
157 void (C::*ptr2)(void *) = (void (C::*)(void *)) (void (A::*)(void *)) &A::foo;
158 // CHECK: @"\01?ptr2@CastParam@@3P8C@1@AEXPAX@ZQ21@" =
159 // CHECK:   global { i8*, i32 } { i8* bitcast (void ({{.*}})* @"\01?foo@A@CastParam@@QAEXPAU12@@Z" to i8*), i32 4 }, align 4
160 
161 void (C::*ptr3)(void *) = (void (C::*)(void *)) (void (A::*)(void *)) (void (A::*)(A *)) 0;
162 // CHECK: @"\01?ptr3@CastParam@@3P8C@1@AEXPAX@ZQ21@" =
163 // CHECK:   global { i8*, i32 } zeroinitializer, align 4
164 
165 struct D : C {
166   virtual void isPolymorphic();
167   int d;
168 };
169 
170 // Try a cast that changes the inheritance model.  Null for D is 0, but null for
171 // C is -1.  We need the cast to long in order to hit the non-APValue path.
172 int C::*ptr4 = (int C::*) (int D::*) (long D::*) 0;
173 // CHECK: @"\01?ptr4@CastParam@@3PQC@1@HQ21@" = global i32 -1, align 4
174 
175 // MSVC rejects this but we accept it.
176 int C::*ptr5 = (int C::*) (long D::*) 0;
177 // CHECK: @"\01?ptr5@CastParam@@3PQC@1@HQ21@" = global i32 -1, align 4
178 }
179 
180 struct UnspecWithVBPtr;
181 int UnspecWithVBPtr::*forceUnspecWithVBPtr;
182 struct UnspecWithVBPtr : B1, virtual B2 {
183   int u;
184   void foo();
185 };
186 
187 // Test emitting non-virtual member pointers in a non-constexpr setting.
188 void EmitNonVirtualMemberPointers() {
189   void (Single     ::*s_f_memptr)() = &Single::foo;
190   void (Multiple   ::*m_f_memptr)() = &Multiple::foo;
191   void (Virtual    ::*v_f_memptr)() = &Virtual::foo;
192   void (Unspecified::*u_f_memptr)() = &Unspecified::foo;
193   void (UnspecWithVBPtr::*u2_f_memptr)() = &UnspecWithVBPtr::foo;
194 // CHECK: define void @"\01?EmitNonVirtualMemberPointers@@YAXXZ"() {{.*}} {
195 // CHECK:   alloca i8*, align 4
196 // CHECK:   alloca { i8*, i32 }, align 4
197 // CHECK:   alloca { i8*, i32, i32 }, align 4
198 // CHECK:   alloca { i8*, i32, i32, i32 }, align 4
199 // CHECK:   store i8* bitcast (void (%{{.*}}*)* @"\01?foo@Single@@QAEXXZ" to i8*), i8** %{{.*}}, align 4
200 // CHECK:   store { i8*, i32 }
201 // CHECK:     { i8* bitcast (void (%{{.*}}*)* @"\01?foo@Multiple@@QAEXXZ" to i8*), i32 0 },
202 // CHECK:     { i8*, i32 }* %{{.*}}, align 4
203 // CHECK:   store { i8*, i32, i32 }
204 // CHECK:     { i8* bitcast (void (%{{.*}}*)* @"\01?foo@Virtual@@QAEXXZ" to i8*), i32 0, i32 0 },
205 // CHECK:     { i8*, i32, i32 }* %{{.*}}, align 4
206 // CHECK:   store { i8*, i32, i32, i32 }
207 // CHECK:     { i8* bitcast (void (%{{.*}}*)* @"\01?foo@Unspecified@@QAEXXZ" to i8*), i32 0, i32 0, i32 0 },
208 // CHECK:     { i8*, i32, i32, i32 }* %{{.*}}, align 4
209 // CHECK:   store { i8*, i32, i32, i32 }
210 // CHECK:     { i8* bitcast (void (%{{.*}}*)* @"\01?foo@UnspecWithVBPtr@@QAEXXZ" to i8*),
211 // CHECK:       i32 0, i32 0, i32 0 },
212 // CHECK:     { i8*, i32, i32, i32 }* %{{.*}}, align 4
213 // CHECK:   ret void
214 // CHECK: }
215 }
216 
217 void podMemPtrs() {
218   int POD::*memptr;
219   memptr = &POD::a;
220   memptr = &POD::b;
221   if (memptr)
222     memptr = 0;
223 // Check that member pointers use the right offsets and that null is -1.
224 // CHECK:      define void @"\01?podMemPtrs@@YAXXZ"() {{.*}} {
225 // CHECK:        %[[memptr:.*]] = alloca i32, align 4
226 // CHECK-NEXT:   store i32 0, i32* %[[memptr]], align 4
227 // CHECK-NEXT:   store i32 4, i32* %[[memptr]], align 4
228 // CHECK-NEXT:   %[[memptr_val:.*]] = load i32, i32* %[[memptr]], align 4
229 // CHECK-NEXT:   %{{.*}} = icmp ne i32 %[[memptr_val]], -1
230 // CHECK-NEXT:   br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
231 // CHECK:        store i32 -1, i32* %[[memptr]], align 4
232 // CHECK:        ret void
233 // CHECK:      }
234 }
235 
236 void polymorphicMemPtrs() {
237   int Polymorphic::*memptr;
238   memptr = &Polymorphic::a;
239   memptr = &Polymorphic::b;
240   if (memptr)
241     memptr = 0;
242 // Member pointers for polymorphic classes include the vtable slot in their
243 // offset and use 0 to represent null.
244 // CHECK:      define void @"\01?polymorphicMemPtrs@@YAXXZ"() {{.*}} {
245 // CHECK:        %[[memptr:.*]] = alloca i32, align 4
246 // CHECK-NEXT:   store i32 4, i32* %[[memptr]], align 4
247 // CHECK-NEXT:   store i32 8, i32* %[[memptr]], align 4
248 // CHECK-NEXT:   %[[memptr_val:.*]] = load i32, i32* %[[memptr]], align 4
249 // CHECK-NEXT:   %{{.*}} = icmp ne i32 %[[memptr_val]], 0
250 // CHECK-NEXT:   br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
251 // CHECK:        store i32 0, i32* %[[memptr]], align 4
252 // CHECK:        ret void
253 // CHECK:      }
254 }
255 
256 bool nullTestDataUnspecified(int Unspecified::*mp) {
257   return mp;
258 // CHECK: define zeroext i1 @"\01?nullTestDataUnspecified@@YA_NPQUnspecified@@H@Z"{{.*}} {
259 // CHECK:   %{{.*}} = load { i32, i32, i32 }, { i32, i32, i32 }* %{{.*}}, align 4
260 // CHECK:   store { i32, i32, i32 } {{.*}} align 4
261 // CHECK:   %[[mp:.*]] = load { i32, i32, i32 }, { i32, i32, i32 }* %{{.*}}, align 4
262 // CHECK:   %[[mp0:.*]] = extractvalue { i32, i32, i32 } %[[mp]], 0
263 // CHECK:   %[[cmp0:.*]] = icmp ne i32 %[[mp0]], 0
264 // CHECK:   %[[mp1:.*]] = extractvalue { i32, i32, i32 } %[[mp]], 1
265 // CHECK:   %[[cmp1:.*]] = icmp ne i32 %[[mp1]], 0
266 // CHECK:   %[[and0:.*]] = or i1 %[[cmp0]], %[[cmp1]]
267 // CHECK:   %[[mp2:.*]] = extractvalue { i32, i32, i32 } %[[mp]], 2
268 // CHECK:   %[[cmp2:.*]] = icmp ne i32 %[[mp2]], -1
269 // CHECK:   %[[and1:.*]] = or i1 %[[and0]], %[[cmp2]]
270 // CHECK:   ret i1 %[[and1]]
271 // CHECK: }
272 
273 // Pass this large type indirectly.
274 // X64-LABEL: define zeroext i1 @"\01?nullTestDataUnspecified@@
275 // X64:             ({ i32, i32, i32 }*)
276 }
277 
278 bool nullTestFunctionUnspecified(void (Unspecified::*mp)()) {
279   return mp;
280 // CHECK: define zeroext i1 @"\01?nullTestFunctionUnspecified@@YA_NP8Unspecified@@AEXXZ@Z"{{.*}} {
281 // CHECK:   %{{.*}} = load { i8*, i32, i32, i32 }, { i8*, i32, i32, i32 }* %{{.*}}, align 4
282 // CHECK:   store { i8*, i32, i32, i32 } {{.*}} align 4
283 // CHECK:   %[[mp:.*]] = load { i8*, i32, i32, i32 }, { i8*, i32, i32, i32 }* %{{.*}}, align 4
284 // CHECK:   %[[mp0:.*]] = extractvalue { i8*, i32, i32, i32 } %[[mp]], 0
285 // CHECK:   %[[cmp0:.*]] = icmp ne i8* %[[mp0]], null
286 // CHECK:   ret i1 %[[cmp0]]
287 // CHECK: }
288 }
289 
290 int loadDataMemberPointerVirtual(Virtual *o, int Virtual::*memptr) {
291   return o->*memptr;
292 // Test that we can unpack this aggregate member pointer and load the member
293 // data pointer.
294 // CHECK: define i32 @"\01?loadDataMemberPointerVirtual@@YAHPAUVirtual@@PQ1@H@Z"{{.*}} {
295 // CHECK:   %[[o:.*]] = load %{{.*}}*, %{{.*}}** %{{.*}}, align 4
296 // CHECK:   %[[memptr:.*]] = load { i32, i32 }, { i32, i32 }* %{{.*}}, align 4
297 // CHECK:   %[[memptr0:.*]] = extractvalue { i32, i32 } %[[memptr:.*]], 0
298 // CHECK:   %[[memptr1:.*]] = extractvalue { i32, i32 } %[[memptr:.*]], 1
299 // CHECK:   %[[v6:.*]] = bitcast %{{.*}}* %[[o]] to i8*
300 // CHECK:   %[[vbptr:.*]] = getelementptr inbounds i8, i8* %[[v6]], i32 0
301 // CHECK:   %[[vbptr_a:.*]] = bitcast i8* %[[vbptr]] to i32**
302 // CHECK:   %[[vbtable:.*]] = load i32*, i32** %[[vbptr_a:.*]]
303 // CHECK:   %[[memptr1_shr:.*]] = ashr exact i32 %[[memptr1]], 2
304 // CHECK:   %[[v7:.*]] = getelementptr inbounds i32, i32* %[[vbtable]], i32 %[[memptr1_shr]]
305 // CHECK:   %[[vbase_offs:.*]] = load i32, i32* %[[v7]]
306 // CHECK:   %[[v10:.*]] = getelementptr inbounds i8, i8* %[[vbptr]], i32 %[[vbase_offs]]
307 // CHECK:   %[[offset:.*]] = getelementptr inbounds i8, i8* %[[v10]], i32 %[[memptr0]]
308 // CHECK:   %[[v11:.*]] = bitcast i8* %[[offset]] to i32*
309 // CHECK:   %[[v12:.*]] = load i32, i32* %[[v11]]
310 // CHECK:   ret i32 %[[v12]]
311 // CHECK: }
312 
313 // A two-field data memptr on x64 gets coerced to i64 and is passed in a
314 // register or memory.
315 // X64-LABEL: define i32 @"\01?loadDataMemberPointerVirtual@@YAHPEAUVirtual@@PEQ1@H@Z"
316 // X64:             (%struct.Virtual* %o, i64 %memptr.coerce)
317 }
318 
319 int loadDataMemberPointerUnspecified(Unspecified *o, int Unspecified::*memptr) {
320   return o->*memptr;
321 // Test that we can unpack this aggregate member pointer and load the member
322 // data pointer.
323 // CHECK: define i32 @"\01?loadDataMemberPointerUnspecified@@YAHPAUUnspecified@@PQ1@H@Z"{{.*}} {
324 // CHECK:   %[[o:.*]] = load %{{.*}}*, %{{.*}}** %{{.*}}, align 4
325 // CHECK:   %[[memptr:.*]] = load { i32, i32, i32 }, { i32, i32, i32 }* %{{.*}}, align 4
326 // CHECK:   %[[memptr0:.*]] = extractvalue { i32, i32, i32 } %[[memptr:.*]], 0
327 // CHECK:   %[[memptr1:.*]] = extractvalue { i32, i32, i32 } %[[memptr:.*]], 1
328 // CHECK:   %[[memptr2:.*]] = extractvalue { i32, i32, i32 } %[[memptr:.*]], 2
329 // CHECK:   %[[base:.*]] = bitcast %{{.*}}* %[[o]] to i8*
330 // CHECK:   %[[is_vbase:.*]] = icmp ne i32 %[[memptr2]], 0
331 // CHECK:   br i1 %[[is_vbase]], label %[[vadjust:.*]], label %[[skip:.*]]
332 //
333 // CHECK: [[vadjust]]
334 // CHECK:   %[[vbptr:.*]] = getelementptr inbounds i8, i8* %[[base]], i32 %[[memptr1]]
335 // CHECK:   %[[vbptr_a:.*]] = bitcast i8* %[[vbptr]] to i32**
336 // CHECK:   %[[vbtable:.*]] = load i32*, i32** %[[vbptr_a:.*]]
337 // CHECK:   %[[memptr2_shr:.*]] = ashr exact i32 %[[memptr2]], 2
338 // CHECK:   %[[v7:.*]] = getelementptr inbounds i32, i32* %[[vbtable]], i32 %[[memptr2_shr]]
339 // CHECK:   %[[vbase_offs:.*]] = load i32, i32* %[[v7]]
340 // CHECK:   %[[base_adj:.*]] = getelementptr inbounds i8, i8* %[[vbptr]], i32 %[[vbase_offs]]
341 //
342 // CHECK: [[skip]]
343 // CHECK:   %[[new_base:.*]] = phi i8* [ %[[base]], %{{.*}} ], [ %[[base_adj]], %[[vadjust]] ]
344 // CHECK:   %[[offset:.*]] = getelementptr inbounds i8, i8* %[[new_base]], i32 %[[memptr0]]
345 // CHECK:   %[[v11:.*]] = bitcast i8* %[[offset]] to i32*
346 // CHECK:   %[[v12:.*]] = load i32, i32* %[[v11]]
347 // CHECK:   ret i32 %[[v12]]
348 // CHECK: }
349 }
350 
351 void callMemberPointerSingle(Single *o, void (Single::*memptr)()) {
352   (o->*memptr)();
353 // Just look for an indirect thiscall.
354 // CHECK: define void @"\01?callMemberPointerSingle@@{{.*}} {{.*}} {
355 // CHECK:   call x86_thiscallcc void %{{.*}}(%{{.*}} %{{.*}})
356 // CHECK:   ret void
357 // CHECK: }
358 
359 // X64-LABEL: define void @"\01?callMemberPointerSingle@@
360 // X64:           (%struct.Single* %o, i8* %memptr)
361 // X64:   bitcast i8* %{{[^ ]*}} to void (%struct.Single*)*
362 // X64:   ret void
363 }
364 
365 void callMemberPointerMultiple(Multiple *o, void (Multiple::*memptr)()) {
366   (o->*memptr)();
367 // CHECK: define void @"\01?callMemberPointerMultiple@@{{.*}} {
368 // CHECK:   %[[memptr0:.*]] = extractvalue { i8*, i32 } %{{.*}}, 0
369 // CHECK:   %[[memptr1:.*]] = extractvalue { i8*, i32 } %{{.*}}, 1
370 // CHECK:   %[[this_adjusted:.*]] = getelementptr inbounds i8, i8* %{{.*}}, i32 %[[memptr1]]
371 // CHECK:   %[[this:.*]] = bitcast i8* %[[this_adjusted]] to {{.*}}
372 // CHECK:   %[[fptr:.*]] = bitcast i8* %[[memptr0]] to {{.*}}
373 // CHECK:   call x86_thiscallcc void %[[fptr]](%{{.*}} %[[this]])
374 // CHECK:   ret void
375 // CHECK: }
376 }
377 
378 void callMemberPointerVirtualBase(Virtual *o, void (Virtual::*memptr)()) {
379   (o->*memptr)();
380 // This shares a lot with virtual data member pointers.
381 // CHECK: define void @"\01?callMemberPointerVirtualBase@@{{.*}} {
382 // CHECK:   %[[memptr0:.*]] = extractvalue { i8*, i32, i32 } %{{.*}}, 0
383 // CHECK:   %[[memptr1:.*]] = extractvalue { i8*, i32, i32 } %{{.*}}, 1
384 // CHECK:   %[[memptr2:.*]] = extractvalue { i8*, i32, i32 } %{{.*}}, 2
385 // CHECK:   %[[vbptr:.*]] = getelementptr inbounds i8, i8* %{{.*}}, i32 0
386 // CHECK:   %[[vbptr_a:.*]] = bitcast i8* %[[vbptr]] to i32**
387 // CHECK:   %[[vbtable:.*]] = load i32*, i32** %[[vbptr_a:.*]]
388 // CHECK:   %[[memptr2_shr:.*]] = ashr exact i32 %[[memptr2]], 2
389 // CHECK:   %[[v7:.*]] = getelementptr inbounds i32, i32* %[[vbtable]], i32 %[[memptr2_shr]]
390 // CHECK:   %[[vbase_offs:.*]] = load i32, i32* %[[v7]]
391 // CHECK:   %[[v10:.*]] = getelementptr inbounds i8, i8* %[[vbptr]], i32 %[[vbase_offs]]
392 // CHECK:   %[[this_adjusted:.*]] = getelementptr inbounds i8, i8* %[[v10]], i32 %[[memptr1]]
393 // CHECK:   %[[fptr:.*]] = bitcast i8* %[[memptr0]] to void ({{.*}})
394 // CHECK:   %[[this:.*]] = bitcast i8* %[[this_adjusted]] to {{.*}}
395 // CHECK:   call x86_thiscallcc void %[[fptr]](%{{.*}} %[[this]])
396 // CHECK:   ret void
397 // CHECK: }
398 }
399 
400 bool compareSingleFunctionMemptr(void (Single::*l)(), void (Single::*r)()) {
401   return l == r;
402 // Should only be one comparison here.
403 // CHECK: define zeroext i1 @"\01?compareSingleFunctionMemptr@@YA_NP8Single@@AEXXZ0@Z"{{.*}} {
404 // CHECK-NOT: icmp
405 // CHECK:   %[[r:.*]] = icmp eq
406 // CHECK-NOT: icmp
407 // CHECK:   ret i1 %[[r]]
408 // CHECK: }
409 
410 // X64-LABEL: define zeroext i1 @"\01?compareSingleFunctionMemptr@@
411 // X64:             (i8* %{{[^,]*}}, i8* %{{[^)]*}})
412 }
413 
414 bool compareNeqSingleFunctionMemptr(void (Single::*l)(), void (Single::*r)()) {
415   return l != r;
416 // Should only be one comparison here.
417 // CHECK: define zeroext i1 @"\01?compareNeqSingleFunctionMemptr@@YA_NP8Single@@AEXXZ0@Z"{{.*}} {
418 // CHECK-NOT: icmp
419 // CHECK:   %[[r:.*]] = icmp ne
420 // CHECK-NOT: icmp
421 // CHECK:   ret i1 %[[r]]
422 // CHECK: }
423 }
424 
425 bool unspecFuncMemptrEq(void (Unspecified::*l)(), void (Unspecified::*r)()) {
426   return l == r;
427 // CHECK: define zeroext i1 @"\01?unspecFuncMemptrEq@@YA_NP8Unspecified@@AEXXZ0@Z"{{.*}} {
428 // CHECK:   %[[lhs0:.*]] = extractvalue { i8*, i32, i32, i32 } %[[l:.*]], 0
429 // CHECK:   %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r:.*]], 0
430 // CHECK:   %[[cmp0:.*]] = icmp eq i8* %[[lhs0]], %{{.*}}
431 // CHECK:   %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[l]], 1
432 // CHECK:   %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r]], 1
433 // CHECK:   %[[cmp1:.*]] = icmp eq i32
434 // CHECK:   %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[l]], 2
435 // CHECK:   %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r]], 2
436 // CHECK:   %[[cmp2:.*]] = icmp eq i32
437 // CHECK:   %[[res12:.*]] = and i1 %[[cmp1]], %[[cmp2]]
438 // CHECK:   %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[l]], 3
439 // CHECK:   %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r]], 3
440 // CHECK:   %[[cmp3:.*]] = icmp eq i32
441 // CHECK:   %[[res123:.*]] = and i1 %[[res12]], %[[cmp3]]
442 // CHECK:   %[[iszero:.*]] = icmp eq i8* %[[lhs0]], null
443 // CHECK:   %[[bits_or_null:.*]] = or i1 %[[res123]], %[[iszero]]
444 // CHECK:   %{{.*}} = and i1 %[[bits_or_null]], %[[cmp0]]
445 // CHECK:   ret i1 %{{.*}}
446 // CHECK: }
447 
448 // X64-LABEL: define zeroext i1 @"\01?unspecFuncMemptrEq@@
449 // X64:             ({ i8*, i32, i32, i32 }*, { i8*, i32, i32, i32 }*)
450 }
451 
452 bool unspecFuncMemptrNeq(void (Unspecified::*l)(), void (Unspecified::*r)()) {
453   return l != r;
454 // CHECK: define zeroext i1 @"\01?unspecFuncMemptrNeq@@YA_NP8Unspecified@@AEXXZ0@Z"{{.*}} {
455 // CHECK:   %[[lhs0:.*]] = extractvalue { i8*, i32, i32, i32 } %[[l:.*]], 0
456 // CHECK:   %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r:.*]], 0
457 // CHECK:   %[[cmp0:.*]] = icmp ne i8* %[[lhs0]], %{{.*}}
458 // CHECK:   %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[l]], 1
459 // CHECK:   %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r]], 1
460 // CHECK:   %[[cmp1:.*]] = icmp ne i32
461 // CHECK:   %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[l]], 2
462 // CHECK:   %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r]], 2
463 // CHECK:   %[[cmp2:.*]] = icmp ne i32
464 // CHECK:   %[[res12:.*]] = or i1 %[[cmp1]], %[[cmp2]]
465 // CHECK:   %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[l]], 3
466 // CHECK:   %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r]], 3
467 // CHECK:   %[[cmp3:.*]] = icmp ne i32
468 // CHECK:   %[[res123:.*]] = or i1 %[[res12]], %[[cmp3]]
469 // CHECK:   %[[iszero:.*]] = icmp ne i8* %[[lhs0]], null
470 // CHECK:   %[[bits_or_null:.*]] = and i1 %[[res123]], %[[iszero]]
471 // CHECK:   %{{.*}} = or i1 %[[bits_or_null]], %[[cmp0]]
472 // CHECK:   ret i1 %{{.*}}
473 // CHECK: }
474 }
475 
476 bool unspecDataMemptrEq(int Unspecified::*l, int Unspecified::*r) {
477   return l == r;
478 // CHECK: define zeroext i1 @"\01?unspecDataMemptrEq@@YA_NPQUnspecified@@H0@Z"{{.*}} {
479 // CHECK:   extractvalue { i32, i32, i32 } %{{.*}}, 0
480 // CHECK:   extractvalue { i32, i32, i32 } %{{.*}}, 0
481 // CHECK:   icmp eq i32
482 // CHECK:   extractvalue { i32, i32, i32 } %{{.*}}, 1
483 // CHECK:   extractvalue { i32, i32, i32 } %{{.*}}, 1
484 // CHECK:   icmp eq i32
485 // CHECK:   extractvalue { i32, i32, i32 } %{{.*}}, 2
486 // CHECK:   extractvalue { i32, i32, i32 } %{{.*}}, 2
487 // CHECK:   icmp eq i32
488 // CHECK:   and i1
489 // CHECK:   and i1
490 // CHECK:   ret i1
491 // CHECK: }
492 
493 // X64-LABEL: define zeroext i1 @"\01?unspecDataMemptrEq@@
494 // X64:             ({ i32, i32, i32 }*, { i32, i32, i32 }*)
495 }
496 
497 void (Multiple::*convertB2FuncToMultiple(void (B2::*mp)()))() {
498   return mp;
499 // CHECK: define i64 @"\01?convertB2FuncToMultiple@@YAP8Multiple@@AEXXZP8B2@@AEXXZ@Z"{{.*}} {
500 // CHECK:   store
501 // CHECK:   %[[mp:.*]] = load i8*, i8** %{{.*}}, align 4
502 // CHECK:   icmp ne i8* %[[mp]], null
503 // CHECK:   br i1 %{{.*}} label %{{.*}}, label %{{.*}}
504 //
505 //        memptr.convert:                                   ; preds = %entry
506 // CHECK:   insertvalue { i8*, i32 } undef, i8* %[[mp]], 0
507 // CHECK:   insertvalue { i8*, i32 } %{{.*}}, i32 4, 1
508 // CHECK:   br label
509 //
510 //        memptr.converted:                                 ; preds = %memptr.convert, %entry
511 // CHECK:   phi { i8*, i32 } [ zeroinitializer, %{{.*}} ], [ {{.*}} ]
512 // CHECK: }
513 }
514 
515 void (B2::*convertMultipleFuncToB2(void (Multiple::*mp)()))() {
516 // FIXME: cl emits warning C4407 on this code because of the representation
517 // change.  We might want to do the same.
518   return static_cast<void (B2::*)()>(mp);
519 // FIXME: We should return i8* instead of i32 here.  The ptrtoint cast prevents
520 // LLVM from optimizing away the branch.  This is likely a bug in
521 // lib/CodeGen/TargetInfo.cpp with how we classify memptr types for returns.
522 //
523 // CHECK: define i32 @"\01?convertMultipleFuncToB2@@YAP8B2@@AEXXZP8Multiple@@AEXXZ@Z"{{.*}} {
524 // CHECK:   store
525 // CHECK:   %[[src:.*]] = load { i8*, i32 }, { i8*, i32 }* %{{.*}}, align 4
526 // CHECK:   extractvalue { i8*, i32 } %[[src]], 0
527 // CHECK:   icmp ne i8* %{{.*}}, null
528 // CHECK:   br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
529 //
530 //        memptr.convert:                                   ; preds = %entry
531 // CHECK:   %[[fp:.*]] = extractvalue { i8*, i32 } %[[src]], 0
532 // CHECK:   br label
533 //
534 //        memptr.converted:                                 ; preds = %memptr.convert, %entry
535 // CHECK:   phi i8* [ null, %{{.*}} ], [ %[[fp]], %{{.*}} ]
536 // CHECK: }
537 }
538 
539 namespace Test1 {
540 
541 struct A { int a; };
542 struct B { int b; };
543 struct C : virtual A { int c; };
544 struct D : B, C { int d; };
545 
546 void (D::*convertCToD(void (C::*mp)()))() {
547   return mp;
548 // CHECK: define void @"\01?convertCToD@Test1@@YAP8D@1@AEXXZP8C@1@AEXXZ@Z"{{.*}} {
549 // CHECK:   store
550 // CHECK:   load { i8*, i32, i32 }, { i8*, i32, i32 }* %{{.*}}, align 4
551 // CHECK:   extractvalue { i8*, i32, i32 } %{{.*}}, 0
552 // CHECK:   icmp ne i8* %{{.*}}, null
553 // CHECK:   br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
554 //
555 //        memptr.convert:                                   ; preds = %entry
556 // CHECK:   extractvalue { i8*, i32, i32 } %{{.*}}, 0
557 // CHECK:   %[[nvoff:.*]] = extractvalue { i8*, i32, i32 } %{{.*}}, 1
558 // CHECK:   %[[vbidx:.*]] = extractvalue { i8*, i32, i32 } %{{.*}}, 2
559 // CHECK:   %[[is_nvbase:.*]] = icmp eq i32 %[[vbidx]], 0
560 // CHECK:   %[[nv_disp:.*]] = add nsw i32 %[[nvoff]], 4
561 // CHECK:   %[[nv_adj:.*]] = select i1 %[[is_nvbase]], i32 %[[nv_disp]], i32 0
562 // CHECK:   %[[dst_adj:.*]] = select i1 %[[is_nvbase]], i32 4, i32 0
563 // CHECK:   %[[adj:.*]] = sub nsw i32 %[[nv_adj]], %[[dst_adj]]
564 // CHECK:   insertvalue { i8*, i32, i32 } undef, i8* {{.*}}, 0
565 // CHECK:   insertvalue { i8*, i32, i32 } {{.*}}, i32 %[[adj]], 1
566 // CHECK:   insertvalue { i8*, i32, i32 } {{.*}}, i32 {{.*}}, 2
567 // CHECK:   br label
568 //
569 //        memptr.converted:                                 ; preds = %memptr.convert, %entry
570 // CHECK:   phi { i8*, i32, i32 } [ { i8* null, i32 0, i32 -1 }, {{.*}} ], [ {{.*}} ]
571 // CHECK: }
572 }
573 
574 }
575 
576 namespace Test2 {
577 // Test that we dynamically convert between different null reps.
578 
579 struct A { int a; };
580 struct B : A { int b; };
581 struct C : A {
582   int c;
583   virtual void hasVfPtr();
584 };
585 
586 int A::*reinterpret(int B::*mp) {
587   return reinterpret_cast<int A::*>(mp);
588 // CHECK: define i32 @"\01?reinterpret@Test2@@YAPQA@1@HPQB@1@H@Z"{{.*}}  {
589 // CHECK-NOT: select
590 // CHECK:   ret i32
591 // CHECK: }
592 }
593 
594 int A::*reinterpret(int C::*mp) {
595   return reinterpret_cast<int A::*>(mp);
596 // CHECK: define i32 @"\01?reinterpret@Test2@@YAPQA@1@HPQC@1@H@Z"{{.*}}  {
597 // CHECK:   %[[mp:.*]] = load i32, i32*
598 // CHECK:   %[[cmp:.*]] = icmp ne i32 %[[mp]], 0
599 // CHECK:   select i1 %[[cmp]], i32 %[[mp]], i32 -1
600 // CHECK: }
601 }
602 
603 }
604 
605 namespace Test3 {
606 // Make sure we cast 'this' to i8* before using GEP.
607 
608 struct A {
609   int a;
610   int b;
611 };
612 
613 int *load_data(A *a, int A::*mp) {
614   return &(a->*mp);
615 // CHECK-LABEL: define i32* @"\01?load_data@Test3@@YAPAHPAUA@1@PQ21@H@Z"{{.*}}  {
616 // CHECK:    %[[a:.*]] = load %"struct.Test3::A"*, %"struct.Test3::A"** %{{.*}}, align 4
617 // CHECK:    %[[mp:.*]] = load i32, i32* %{{.*}}, align 4
618 // CHECK:    %[[a_i8:.*]] = bitcast %"struct.Test3::A"* %[[a]] to i8*
619 // CHECK:    getelementptr inbounds i8, i8* %[[a_i8]], i32 %[[mp]]
620 // CHECK: }
621 }
622 
623 }
624 
625 namespace Test4 {
626 
627 struct A        { virtual void f(); };
628 struct B        { virtual void g(); };
629 struct C : A, B { virtual void g(); };
630 
631 void (C::*getmp())() {
632   return &C::g;
633 }
634 // CHECK-LABEL: define i64 @"\01?getmp@Test4@@YAP8C@1@AEXXZXZ"()
635 // CHECK: store { i8*, i32 } { i8* bitcast (void (%"struct.Test4::C"*, ...)* @"\01??_9C@Test4@@$BA@AE" to i8*), i32 4 }, { i8*, i32 }* %{{.*}}
636 //
637 
638 // CHECK-LABEL: define linkonce_odr x86_thiscallcc void @"\01??_9C@Test4@@$BA@AE"(%"struct.Test4::C"* %this, ...) {{.*}} comdat
639 // CHECK-NOT:  getelementptr
640 // CHECK:  load void (%"struct.Test4::C"*, ...)**, void (%"struct.Test4::C"*, ...)*** %{{.*}}
641 // CHECK:  getelementptr inbounds void (%"struct.Test4::C"*, ...)*, void (%"struct.Test4::C"*, ...)** %{{.*}}, i64 0
642 // CHECK-NOT:  getelementptr
643 // CHECK:  musttail call x86_thiscallcc void (%"struct.Test4::C"*, ...) %
644 
645 }
646 
647 namespace pr20007 {
648 struct A {
649   void f();
650   void f(int);
651 };
652 struct B : public A {};
653 void test() { void (B::*a)() = &B::f; }
654 // CHECK-LABEL: define void @"\01?test@pr20007@@YAXXZ"
655 // CHECK: store i8* bitcast (void (%"struct.pr20007::A"*)* @"\01?f@A@pr20007@@QAEXXZ" to i8*)
656 }
657 
658 namespace pr20007_kw {
659 struct A {
660   void f();
661   void f(int);
662 };
663 struct __single_inheritance B;
664 struct B : public A {};
665 void test() { void (B::*a)() = &B::f; }
666 // CHECK-LABEL: define void @"\01?test@pr20007_kw@@YAXXZ"
667 // CHECK: store i8* bitcast (void (%"struct.pr20007_kw::A"*)* @"\01?f@A@pr20007_kw@@QAEXXZ" to i8*)
668 }
669 
670 namespace pr20007_pragma {
671 struct A {
672   void f();
673   void f(int);
674 };
675 struct B : public A {};
676 void test() { (void)(void (B::*)()) &B::f; }
677 #pragma pointers_to_members(full_generality, virtual_inheritance)
678 static_assert(sizeof(int B::*) == 4, "");
679 static_assert(sizeof(int A::*) == 4, "");
680 #pragma pointers_to_members(best_case)
681 // CHECK-LABEL: define void @"\01?test@pr20007_pragma@@YAXXZ"
682 }
683 
684 namespace pr20007_pragma2 {
685 struct A {
686 };
687 struct B : public A {
688   void f();
689 };
690 void test() { (void)&B::f; }
691 #pragma pointers_to_members(full_generality, virtual_inheritance)
692 static_assert(sizeof(int B::*) == 4, "");
693 static_assert(sizeof(int A::*) == 12, "");
694 #pragma pointers_to_members(best_case)
695 // CHECK-LABEL: define void @"\01?test@pr20007_pragma2@@YAXXZ"
696 }
697 
698 namespace pr23823 {
699 struct Base { void Method(); };
700 struct Child : Base {};
701 void use(void (Child::*const &)());
702 void f() { use(&Child::Method); }
703 #pragma pointers_to_members(full_generality, virtual_inheritance)
704 static_assert(sizeof(int Base::*) == 4, "");
705 static_assert(sizeof(int Child::*) == 4, "");
706 #pragma pointers_to_members(best_case)
707 }
708 
709 namespace pr19987 {
710 template <typename T>
711 struct S {
712   int T::*x;
713 };
714 
715 struct U : S<U> {};
716 
717 static_assert(sizeof(S<U>::x) == 12, "");
718 }
719 
720 #else
721 struct __virtual_inheritance A;
722 #ifdef MEMFUN
723 int foo(A *a, int (A::*mp)()) {
724     return (a->*mp)(); // expected-error{{requires a complete class type}}
725 }
726 #else
727 int foo(A *a, int A::*mp) {
728     return a->*mp; // expected-error{{requires a complete class type}}
729 }
730 #endif
731 #endif
732 
733 namespace pr23878 {
734 struct A { virtual void g(); };
735 struct B { virtual void f(); };
736 struct C : virtual B { void f(); };
737 struct D : A, C {};
738 
739 typedef void (D::*DMemPtrTy)();
740 
741 // CHECK-LABEL: define void @"\01?get_memptr@pr23878@@YAP8D@1@AEXXZXZ"
742 // CHECK: @"\01??_9C@pr23878@@$BA@AE" to i8*), i32 0, i32 4
743 DMemPtrTy get_memptr() { return &D::f; }
744 }
745 
746 class C {};
747 
748 typedef void (C::*f)();
749 
750 class CA : public C {
751 public:
752   void OnHelp(void);
753   int OnHelp(int);
754 };
755 
756 // CHECK-LABEL: foo_fun
757 void foo_fun() {
758   // CHECK: store i8* bitcast (void (%class.CA*)* @"\01?OnHelp@CA@@QAEXXZ" to i8*), i8**
759   f func = (f)&CA::OnHelp;
760 }
761 namespace PR24703 {
762 struct S;
763 
764 void f(int S::*&p) {}
765 // CHECK-LABEL: define void @"\01?f@PR24703@@YAXAAPQS@1@H@Z"(
766 }
767 
768 namespace ReferenceToMPTWithIncompleteClass {
769 struct S;
770 struct J;
771 struct K;
772 extern K *k;
773 
774 // CHECK-LABEL: @"\01?f@ReferenceToMPTWithIncompleteClass@@YAIAAPQS@1@H@Z"(
775 // CHECK: ret i32 12
776 unsigned f(int S::*&p) { return sizeof p; }
777 
778 // CHECK-LABEL: @"\01?g@ReferenceToMPTWithIncompleteClass@@YA_NAAPQJ@1@H0@Z"(
779 bool g(int J::*&p, int J::*&q) { return p == q; }
780 
781 // CHECK-LABEL: @"\01?h@ReferenceToMPTWithIncompleteClass@@YAHAAPQK@1@H@Z"(
782 int h(int K::*&p) { return k->*p; }
783 }
784 
785 namespace PMFInTemplateArgument {
786 template <class C, int (C::*M)(int)>
787 void JSMethod();
788 class A {
789   int printd(int);
790   void printd();
791 };
792 void A::printd() { JSMethod<A, &A::printd>(); }
793 // CHECK-LABEL: @"\01??$JSMethod@VA@PMFInTemplateArgument@@$1?printd@12@AAEHH@Z@PMFInTemplateArgument@@YAXXZ"(
794 }
795