1 // RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-pc-linux | FileCheck -check-prefix LINUX %s
2 // RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-pc-win32 -mconstructor-aliases -fno-rtti | FileCheck -check-prefix WIN32 %s
3 // RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-pc-win32 -mconstructor-aliases -fno-rtti | FileCheck -check-prefix WIN64 %s
4 
5 struct Empty {};
6 
7 struct EmptyWithCtor {
EmptyWithCtorEmptyWithCtor8   EmptyWithCtor() {}
9 };
10 
11 struct Small {
12   int x;
13 };
14 
15 // This is a C++11 trivial and standard-layout struct but not a C++03 POD.
16 struct SmallCpp11NotCpp03Pod : Empty {
17   int x;
18 };
19 
20 struct SmallWithCtor {
SmallWithCtorSmallWithCtor21   SmallWithCtor() {}
22   int x;
23 };
24 
25 struct SmallWithDtor {
26   SmallWithDtor();
27   ~SmallWithDtor();
28   int x;
29 };
30 
31 struct SmallWithVftable {
32   int x;
33   virtual void foo();
34 };
35 
36 struct Medium {
37   int x, y;
38 };
39 
40 struct MediumWithCopyCtor {
41   MediumWithCopyCtor();
42   MediumWithCopyCtor(const struct MediumWithCopyCtor &);
43   int x, y;
44 };
45 
46 struct Big {
47   int a, b, c, d, e, f;
48 };
49 
50 struct BigWithDtor {
51   BigWithDtor();
52   ~BigWithDtor();
53   int a, b, c, d, e, f;
54 };
55 
56 // WIN32: declare void @"{{.*take_bools_and_chars.*}}"
57 // WIN32:       (<{ i8, [3 x i8], i8, [3 x i8], %struct.SmallWithDtor,
58 // WIN32:           i8, [3 x i8], i8, [3 x i8], i32, i8, [3 x i8] }>* inalloca)
59 void take_bools_and_chars(char a, char b, SmallWithDtor c, char d, bool e, int f, bool g);
call_bools_and_chars()60 void call_bools_and_chars() {
61   take_bools_and_chars('A', 'B', SmallWithDtor(), 'D', true, 13, false);
62 }
63 
64 // Returning structs that fit into a register.
small_return()65 Small small_return() { return Small(); }
66 // LINUX-LABEL: define void @_Z12small_returnv(%struct.Small* noalias sret %agg.result)
67 // WIN32: define i32 @"\01?small_return@@YA?AUSmall@@XZ"()
68 // WIN64: define i32 @"\01?small_return@@YA?AUSmall@@XZ"()
69 
medium_return()70 Medium medium_return() { return Medium(); }
71 // LINUX-LABEL: define void @_Z13medium_returnv(%struct.Medium* noalias sret %agg.result)
72 // WIN32: define i64 @"\01?medium_return@@YA?AUMedium@@XZ"()
73 // WIN64: define i64 @"\01?medium_return@@YA?AUMedium@@XZ"()
74 
75 // Returning structs that fit into a register but are not POD.
small_non_pod_return()76 SmallCpp11NotCpp03Pod small_non_pod_return() { return SmallCpp11NotCpp03Pod(); }
77 // LINUX-LABEL: define void @_Z20small_non_pod_returnv(%struct.SmallCpp11NotCpp03Pod* noalias sret %agg.result)
78 // WIN32: define void @"\01?small_non_pod_return@@YA?AUSmallCpp11NotCpp03Pod@@XZ"(%struct.SmallCpp11NotCpp03Pod* noalias sret %agg.result)
79 // WIN64: define void @"\01?small_non_pod_return@@YA?AUSmallCpp11NotCpp03Pod@@XZ"(%struct.SmallCpp11NotCpp03Pod* noalias sret %agg.result)
80 
small_with_ctor_return()81 SmallWithCtor small_with_ctor_return() { return SmallWithCtor(); }
82 // LINUX-LABEL: define void @_Z22small_with_ctor_returnv(%struct.SmallWithCtor* noalias sret %agg.result)
83 // WIN32: define void @"\01?small_with_ctor_return@@YA?AUSmallWithCtor@@XZ"(%struct.SmallWithCtor* noalias sret %agg.result)
84 // WIN64: define void @"\01?small_with_ctor_return@@YA?AUSmallWithCtor@@XZ"(%struct.SmallWithCtor* noalias sret %agg.result)
85 
small_with_vftable_return()86 SmallWithVftable small_with_vftable_return() { return SmallWithVftable(); }
87 // LINUX-LABEL: define void @_Z25small_with_vftable_returnv(%struct.SmallWithVftable* noalias sret %agg.result)
88 // WIN32: define void @"\01?small_with_vftable_return@@YA?AUSmallWithVftable@@XZ"(%struct.SmallWithVftable* noalias sret %agg.result)
89 // WIN64: define void @"\01?small_with_vftable_return@@YA?AUSmallWithVftable@@XZ"(%struct.SmallWithVftable* noalias sret %agg.result)
90 
medium_with_copy_ctor_return()91 MediumWithCopyCtor medium_with_copy_ctor_return() { return MediumWithCopyCtor(); }
92 // LINUX-LABEL: define void @_Z28medium_with_copy_ctor_returnv(%struct.MediumWithCopyCtor* noalias sret %agg.result)
93 // WIN32: define void @"\01?medium_with_copy_ctor_return@@YA?AUMediumWithCopyCtor@@XZ"(%struct.MediumWithCopyCtor* noalias sret %agg.result)
94 // WIN64: define void @"\01?medium_with_copy_ctor_return@@YA?AUMediumWithCopyCtor@@XZ"(%struct.MediumWithCopyCtor* noalias sret %agg.result)
95 
96 // Returning a large struct that doesn't fit into a register.
big_return()97 Big big_return() { return Big(); }
98 // LINUX-LABEL: define void @_Z10big_returnv(%struct.Big* noalias sret %agg.result)
99 // WIN32: define void @"\01?big_return@@YA?AUBig@@XZ"(%struct.Big* noalias sret %agg.result)
100 // WIN64: define void @"\01?big_return@@YA?AUBig@@XZ"(%struct.Big* noalias sret %agg.result)
101 
102 
small_arg(Small s)103 void small_arg(Small s) {}
104 // LINUX-LABEL: define void @_Z9small_arg5Small(i32 %s.0)
105 // WIN32: define void @"\01?small_arg@@YAXUSmall@@@Z"(%struct.Small* byval align 4 %s)
106 // WIN64: define void @"\01?small_arg@@YAXUSmall@@@Z"(i32 %s.coerce)
107 
medium_arg(Medium s)108 void medium_arg(Medium s) {}
109 // LINUX-LABEL: define void @_Z10medium_arg6Medium(i32 %s.0, i32 %s.1)
110 // WIN32: define void @"\01?medium_arg@@YAXUMedium@@@Z"(%struct.Medium* byval align 4 %s)
111 // WIN64: define void @"\01?medium_arg@@YAXUMedium@@@Z"(i64 %s.coerce)
112 
small_arg_with_ctor(SmallWithCtor s)113 void small_arg_with_ctor(SmallWithCtor s) {}
114 // LINUX-LABEL: define void @_Z19small_arg_with_ctor13SmallWithCtor(%struct.SmallWithCtor* byval align 4 %s)
115 // WIN32: define void @"\01?small_arg_with_ctor@@YAXUSmallWithCtor@@@Z"(%struct.SmallWithCtor* byval align 4 %s)
116 // WIN64: define void @"\01?small_arg_with_ctor@@YAXUSmallWithCtor@@@Z"(i32 %s.coerce)
117 
118 // Test that dtors are invoked in the callee.
small_arg_with_dtor(SmallWithDtor s)119 void small_arg_with_dtor(SmallWithDtor s) {}
120 // WIN32: define void @"\01?small_arg_with_dtor@@YAXUSmallWithDtor@@@Z"(<{ %struct.SmallWithDtor }>* inalloca) {{.*}} {
121 // WIN32:   call x86_thiscallcc void @"\01??1SmallWithDtor@@QAE@XZ"
122 // WIN32: }
123 // WIN64: define void @"\01?small_arg_with_dtor@@YAXUSmallWithDtor@@@Z"(i32 %s.coerce) {{.*}} {
124 // WIN64:   call void @"\01??1SmallWithDtor@@QEAA@XZ"
125 // WIN64: }
126 
call_small_arg_with_dtor()127 void call_small_arg_with_dtor() {
128   small_arg_with_dtor(SmallWithDtor());
129 }
130 // The temporary is copied, so it's destroyed in the caller as well as the
131 // callee.
132 // WIN64-LABEL: define void @"\01?call_small_arg_with_dtor@@YAXXZ"()
133 // WIN64:   call %struct.SmallWithDtor* @"\01??0SmallWithDtor@@QEAA@XZ"
134 // WIN64:   call void @"\01?small_arg_with_dtor@@YAXUSmallWithDtor@@@Z"(i32 %{{.*}})
135 // WIN64:   call void @"\01??1SmallWithDtor@@QEAA@XZ"
136 // WIN64:   ret void
137 
138 // Test that references aren't destroyed in the callee.
ref_small_arg_with_dtor(const SmallWithDtor & s)139 void ref_small_arg_with_dtor(const SmallWithDtor &s) { }
140 // WIN32: define void @"\01?ref_small_arg_with_dtor@@YAXABUSmallWithDtor@@@Z"(%struct.SmallWithDtor* dereferenceable({{[0-9]+}}) %s) {{.*}} {
141 // WIN32-NOT:   call x86_thiscallcc void @"\01??1SmallWithDtor@@QAE@XZ"
142 // WIN32: }
143 // WIN64-LABEL: define void @"\01?ref_small_arg_with_dtor@@YAXAEBUSmallWithDtor@@@Z"(%struct.SmallWithDtor* dereferenceable({{[0-9]+}}) %s)
144 
big_arg_with_dtor(BigWithDtor s)145 void big_arg_with_dtor(BigWithDtor s) {}
146 // WIN64-LABEL: define void @"\01?big_arg_with_dtor@@YAXUBigWithDtor@@@Z"(%struct.BigWithDtor* %s)
147 // WIN64:   call void @"\01??1BigWithDtor@@QEAA@XZ"
148 // WIN64: }
149 
call_big_arg_with_dtor()150 void call_big_arg_with_dtor() {
151   big_arg_with_dtor(BigWithDtor());
152 }
153 // We can elide the copy of the temporary in the caller, because this object is
154 // larger than 8 bytes and is passed indirectly.
155 // WIN64-LABEL: define void @"\01?call_big_arg_with_dtor@@YAXXZ"()
156 // WIN64:   call %struct.BigWithDtor* @"\01??0BigWithDtor@@QEAA@XZ"
157 // WIN64:   call void @"\01?big_arg_with_dtor@@YAXUBigWithDtor@@@Z"(%struct.BigWithDtor* %{{.*}})
158 // WIN64-NOT: call void @"\01??1BigWithDtor@@QEAA@XZ"
159 // WIN64:   ret void
160 
161 // Test that temporaries passed by reference are destroyed in the caller.
temporary_ref_with_dtor()162 void temporary_ref_with_dtor() {
163   ref_small_arg_with_dtor(SmallWithDtor());
164 }
165 // WIN32: define void @"\01?temporary_ref_with_dtor@@YAXXZ"() {{.*}} {
166 // WIN32:   call x86_thiscallcc %struct.SmallWithDtor* @"\01??0SmallWithDtor@@QAE@XZ"
167 // WIN32:   call void @"\01?ref_small_arg_with_dtor@@YAXABUSmallWithDtor@@@Z"
168 // WIN32:   call x86_thiscallcc void @"\01??1SmallWithDtor@@QAE@XZ"
169 // WIN32: }
170 
171 void takes_two_by_val_with_dtor(SmallWithDtor a, SmallWithDtor b);
eh_cleanup_arg_with_dtor()172 void eh_cleanup_arg_with_dtor() {
173   takes_two_by_val_with_dtor(SmallWithDtor(), SmallWithDtor());
174 }
175 //   When exceptions are off, we don't have any cleanups.  See
176 //   microsoft-abi-exceptions.cpp for these cleanups.
177 // WIN32: define void @"\01?eh_cleanup_arg_with_dtor@@YAXXZ"() {{.*}} {
178 // WIN32:   call x86_thiscallcc %struct.SmallWithDtor* @"\01??0SmallWithDtor@@QAE@XZ"
179 // WIN32:   call x86_thiscallcc %struct.SmallWithDtor* @"\01??0SmallWithDtor@@QAE@XZ"
180 // WIN32:   call void @"\01?takes_two_by_val_with_dtor@@YAXUSmallWithDtor@@0@Z"
181 // WIN32-NOT: call x86_thiscallcc void @"\01??1SmallWithDtor@@QAE@XZ"
182 // WIN32: }
183 
small_arg_with_vftable(SmallWithVftable s)184 void small_arg_with_vftable(SmallWithVftable s) {}
185 // LINUX-LABEL: define void @_Z22small_arg_with_vftable16SmallWithVftable(%struct.SmallWithVftable* %s)
186 // WIN32: define void @"\01?small_arg_with_vftable@@YAXUSmallWithVftable@@@Z"(<{ %struct.SmallWithVftable }>* inalloca)
187 // WIN64: define void @"\01?small_arg_with_vftable@@YAXUSmallWithVftable@@@Z"(%struct.SmallWithVftable* %s)
188 
medium_arg_with_copy_ctor(MediumWithCopyCtor s)189 void medium_arg_with_copy_ctor(MediumWithCopyCtor s) {}
190 // LINUX-LABEL: define void @_Z25medium_arg_with_copy_ctor18MediumWithCopyCtor(%struct.MediumWithCopyCtor* %s)
191 // WIN32: define void @"\01?medium_arg_with_copy_ctor@@YAXUMediumWithCopyCtor@@@Z"(<{ %struct.MediumWithCopyCtor }>* inalloca)
192 // WIN64: define void @"\01?medium_arg_with_copy_ctor@@YAXUMediumWithCopyCtor@@@Z"(%struct.MediumWithCopyCtor* %s)
193 
big_arg(Big s)194 void big_arg(Big s) {}
195 // LINUX-LABEL: define void @_Z7big_arg3Big(%struct.Big* byval align 4 %s)
196 // WIN32: define void @"\01?big_arg@@YAXUBig@@@Z"(%struct.Big* byval align 4 %s)
197 // WIN64: define void @"\01?big_arg@@YAXUBig@@@Z"(%struct.Big* %s)
198 
199 class Class {
200  public:
thiscall_method_small()201   Small thiscall_method_small() { return Small(); }
202   // LINUX: define {{.*}} void @_ZN5Class21thiscall_method_smallEv(%struct.Small* noalias sret %agg.result, %class.Class* %this)
203   // WIN32: define {{.*}} x86_thiscallcc void @"\01?thiscall_method_small@Class@@QAE?AUSmall@@XZ"(%class.Class* %this, %struct.Small* noalias sret %agg.result)
204   // WIN64: define linkonce_odr void @"\01?thiscall_method_small@Class@@QEAA?AUSmall@@XZ"(%class.Class* %this, %struct.Small* noalias sret %agg.result)
205 
thiscall_method_small_with_ctor()206   SmallWithCtor thiscall_method_small_with_ctor() { return SmallWithCtor(); }
207   // LINUX: define {{.*}} void @_ZN5Class31thiscall_method_small_with_ctorEv(%struct.SmallWithCtor* noalias sret %agg.result, %class.Class* %this)
208   // WIN32: define {{.*}} x86_thiscallcc void @"\01?thiscall_method_small_with_ctor@Class@@QAE?AUSmallWithCtor@@XZ"(%class.Class* %this, %struct.SmallWithCtor* noalias sret %agg.result)
209   // WIN64: define linkonce_odr void @"\01?thiscall_method_small_with_ctor@Class@@QEAA?AUSmallWithCtor@@XZ"(%class.Class* %this, %struct.SmallWithCtor* noalias sret %agg.result)
210 
cdecl_method_small()211   Small __cdecl cdecl_method_small() { return Small(); }
212   // LINUX: define {{.*}} void @_ZN5Class18cdecl_method_smallEv(%struct.Small* noalias sret %agg.result, %class.Class* %this)
213   // WIN32: define {{.*}} void @"\01?cdecl_method_small@Class@@QAA?AUSmall@@XZ"(%class.Class* %this, %struct.Small* noalias sret %agg.result)
214   // WIN64: define linkonce_odr void @"\01?cdecl_method_small@Class@@QEAA?AUSmall@@XZ"(%class.Class* %this, %struct.Small* noalias sret %agg.result)
215 
cdecl_method_big()216   Big __cdecl cdecl_method_big() { return Big(); }
217   // LINUX: define {{.*}} void @_ZN5Class16cdecl_method_bigEv(%struct.Big* noalias sret %agg.result, %class.Class* %this)
218   // WIN32: define {{.*}} void @"\01?cdecl_method_big@Class@@QAA?AUBig@@XZ"(%class.Class* %this, %struct.Big* noalias sret %agg.result)
219   // WIN64: define linkonce_odr void @"\01?cdecl_method_big@Class@@QEAA?AUBig@@XZ"(%class.Class* %this, %struct.Big* noalias sret %agg.result)
220 
thiscall_method_arg(Empty s)221   void thiscall_method_arg(Empty s) {}
222   // LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE5Empty(%class.Class* %this)
223   // WIN32: define {{.*}} void @"\01?thiscall_method_arg@Class@@QAEXUEmpty@@@Z"(%class.Class* %this, %struct.Empty* byval align 4 %s)
224   // WIN64: define linkonce_odr void @"\01?thiscall_method_arg@Class@@QEAAXUEmpty@@@Z"(%class.Class* %this, i8 %s.coerce)
225 
thiscall_method_arg(EmptyWithCtor s)226   void thiscall_method_arg(EmptyWithCtor s) {}
227   // LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE13EmptyWithCtor(%class.Class* %this)
228   // WIN32: define {{.*}} void @"\01?thiscall_method_arg@Class@@QAEXUEmptyWithCtor@@@Z"(%class.Class* %this, %struct.EmptyWithCtor* byval align 4 %s)
229   // WIN64: define linkonce_odr void @"\01?thiscall_method_arg@Class@@QEAAXUEmptyWithCtor@@@Z"(%class.Class* %this, i8 %s.coerce)
230 
thiscall_method_arg(Small s)231   void thiscall_method_arg(Small s) {}
232   // LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE5Small(%class.Class* %this, i32 %s.0)
233   // WIN32: define {{.*}} void @"\01?thiscall_method_arg@Class@@QAEXUSmall@@@Z"(%class.Class* %this, %struct.Small* byval align 4 %s)
234   // WIN64: define linkonce_odr void @"\01?thiscall_method_arg@Class@@QEAAXUSmall@@@Z"(%class.Class* %this, i32 %s.coerce)
235 
thiscall_method_arg(SmallWithCtor s)236   void thiscall_method_arg(SmallWithCtor s) {}
237   // LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE13SmallWithCtor(%class.Class* %this, %struct.SmallWithCtor* byval align 4 %s)
238   // WIN32: define {{.*}} void @"\01?thiscall_method_arg@Class@@QAEXUSmallWithCtor@@@Z"(%class.Class* %this, %struct.SmallWithCtor* byval align 4 %s)
239   // WIN64: define linkonce_odr void @"\01?thiscall_method_arg@Class@@QEAAXUSmallWithCtor@@@Z"(%class.Class* %this, i32 %s.coerce)
240 
thiscall_method_arg(Big s)241   void thiscall_method_arg(Big s) {}
242   // LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE3Big(%class.Class* %this, %struct.Big* byval align 4 %s)
243   // WIN32: define {{.*}} void @"\01?thiscall_method_arg@Class@@QAEXUBig@@@Z"(%class.Class* %this, %struct.Big* byval align 4 %s)
244   // WIN64: define linkonce_odr void @"\01?thiscall_method_arg@Class@@QEAAXUBig@@@Z"(%class.Class* %this, %struct.Big* %s)
245 };
246 
use_class()247 void use_class() {
248   Class c;
249   c.thiscall_method_small();
250   c.thiscall_method_small_with_ctor();
251 
252   c.cdecl_method_small();
253   c.cdecl_method_big();
254 
255   c.thiscall_method_arg(Empty());
256   c.thiscall_method_arg(EmptyWithCtor());
257   c.thiscall_method_arg(Small());
258   c.thiscall_method_arg(SmallWithCtor());
259   c.thiscall_method_arg(Big());
260 }
261 
262 struct X {
263   X();
264   ~X();
265 };
g(X)266 void g(X) {
267 }
268 // WIN32: define void @"\01?g@@YAXUX@@@Z"(<{ %struct.X, [3 x i8] }>* inalloca) {{.*}} {
269 // WIN32:   call x86_thiscallcc void @"\01??1X@@QAE@XZ"(%struct.X* {{.*}})
270 // WIN32: }
f()271 void f() {
272   g(X());
273 }
274 // WIN32: define void @"\01?f@@YAXXZ"() {{.*}} {
275 // WIN32-NOT: call {{.*}} @"\01??1X@@QAE@XZ"
276 // WIN32: }
277 
278 
279 namespace test2 {
280 // We used to crash on this due to the mixture of POD byval and non-trivial
281 // byval.
282 
283 struct NonTrivial {
284   NonTrivial();
285   NonTrivial(const NonTrivial &o);
286   ~NonTrivial();
287   int a;
288 };
289 struct POD { int b; };
290 
291 int foo(NonTrivial a, POD b);
bar()292 void bar() {
293   POD b;
294   b.b = 13;
295   int c = foo(NonTrivial(), b);
296 }
297 // WIN32-LABEL: define void @"\01?bar@test2@@YAXXZ"() {{.*}} {
298 // WIN32:   %[[argmem:[^ ]*]] = alloca inalloca [[argmem_ty:<{ %"struct.test2::NonTrivial", %"struct.test2::POD" }>]]
299 // WIN32:   getelementptr inbounds [[argmem_ty]], [[argmem_ty]]* %[[argmem]], i32 0, i32 1
300 // WIN32:   call void @llvm.memcpy
301 // WIN32:   getelementptr inbounds [[argmem_ty]], [[argmem_ty]]* %[[argmem]], i32 0, i32 0
302 // WIN32:   call x86_thiscallcc %"struct.test2::NonTrivial"* @"\01??0NonTrivial@test2@@QAE@XZ"
303 // WIN32:   call i32 @"\01?foo@test2@@YAHUNonTrivial@1@UPOD@1@@Z"([[argmem_ty]]* inalloca %argmem)
304 // WIN32:   ret void
305 // WIN32: }
306 
307 }
308 
309 namespace test3 {
310 
311 // Check that we padded the inalloca struct to a multiple of 4.
312 struct NonTrivial {
313   NonTrivial();
314   NonTrivial(const NonTrivial &o);
315   ~NonTrivial();
316   int a;
317 };
foo(NonTrivial a,bool b)318 void foo(NonTrivial a, bool b) { }
319 // WIN32-LABEL: define void @"\01?foo@test3@@YAXUNonTrivial@1@_N@Z"(<{ %"struct.test3::NonTrivial", i8, [3 x i8] }>* inalloca)
320 
321 }
322 
323 // We would crash here because the later definition of ForwardDeclare1 results
324 // in a different IR type for the value we want to store.  However, the alloca's
325 // type will use the argument type selected by fn1.
326 struct ForwardDeclare1;
327 
328 typedef void (*FnPtr1)(ForwardDeclare1);
fn1(FnPtr1 a,SmallWithDtor b)329 void fn1(FnPtr1 a, SmallWithDtor b) { }
330 
331 struct ForwardDeclare1 {};
332 
fn2(FnPtr1 a,SmallWithDtor b)333 void fn2(FnPtr1 a, SmallWithDtor b) { fn1(a, b); };
334 // WIN32-LABEL: define void @"\01?fn2@@YAXP6AXUForwardDeclare1@@@ZUSmallWithDtor@@@Z"
335 // WIN32:   %[[a:[^ ]*]] = getelementptr inbounds [[argmem_ty:<{ {}\*, %struct.SmallWithDtor }>]], [[argmem_ty:<{ {}\*, %struct.SmallWithDtor }>]]* %{{.*}}, i32 0, i32 0
336 // WIN32:   %[[a1:[^ ]*]] = bitcast {}** %[[a]] to void [[dst_ty:\(%struct.ForwardDeclare1\*\)\*]]*
337 // WIN32:   %[[argmem:[^ ]*]] = alloca inalloca [[argmem_ty]]
338 // WIN32:   %[[gep1:[^ ]*]] = getelementptr inbounds [[argmem_ty]], [[argmem_ty]]* %[[argmem]], i32 0, i32 1
339 // WIN32:   %[[bc1:[^ ]*]] = bitcast %struct.SmallWithDtor* %[[gep1]] to i8*
340 // WIN32:   call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[bc1]], i8* {{.*}}, i32 4, i32 4, i1 false)
341 // WIN32:   %[[a2:[^ ]*]] = load void [[dst_ty]], void [[dst_ty]]* %[[a1]], align 4
342 // WIN32:   %[[gep2:[^ ]*]] = getelementptr inbounds [[argmem_ty]], [[argmem_ty]]* %[[argmem]], i32 0, i32 0
343 // WIN32:   %[[addr:[^ ]*]] = bitcast {}** %[[gep2]] to void [[dst_ty]]*
344 // WIN32:   store void [[dst_ty]] %[[a2]], void [[dst_ty]]* %[[addr]], align 4
345 // WIN32:   call void @"\01?fn1@@YAXP6AXUForwardDeclare1@@@ZUSmallWithDtor@@@Z"([[argmem_ty]]* inalloca %[[argmem]])
346