1 | // RUN: %clang_cc1 -fno-rtti -emit-llvm %s -o - -mconstructor-aliases -triple=i386-pc-win32 | FileCheck %s |
2 | |
3 | struct Left { |
4 | virtual void left(); |
5 | }; |
6 | |
7 | struct Right { |
8 | virtual void right(); |
9 | }; |
10 | |
11 | struct ChildNoOverride : Left, Right { |
12 | }; |
13 | |
14 | struct ChildOverride : Left, Right { |
15 | virtual void left(); |
16 | virtual void right(); |
17 | }; |
18 | |
19 | extern "C" void foo(void *); |
20 | |
21 | void call_left_no_override(ChildNoOverride *child) { |
22 | // CHECK-LABEL: define dso_local void @"?call_left_no_override |
23 | // CHECK: %[[CHILD:.*]] = load %struct.ChildNoOverride |
24 | |
25 | child->left(); |
26 | // Only need to cast 'this' to Left*. |
27 | // CHECK: %[[LEFT:.*]] = bitcast %struct.ChildNoOverride* %[[CHILD]] to %struct.Left* |
28 | // CHECK: %[[VFPTR:.*]] = bitcast %struct.Left* %[[LEFT]] to void (%struct.Left*)*** |
29 | // CHECK: %[[VFTABLE:.*]] = load void (%struct.Left*)**, void (%struct.Left*)*** %[[VFPTR]] |
30 | // CHECK: %[[VFUN:.*]] = getelementptr inbounds void (%struct.Left*)*, void (%struct.Left*)** %[[VFTABLE]], i64 0 |
31 | // CHECK: %[[VFUN_VALUE:.*]] = load void (%struct.Left*)*, void (%struct.Left*)** %[[VFUN]] |
32 | // CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](%struct.Left* %[[LEFT]]) |
33 | // CHECK: ret |
34 | } |
35 | |
36 | void ChildOverride::left() { |
37 | // CHECK-LABEL: define dso_local x86_thiscallcc void @"?left@ChildOverride@@UAEXXZ" |
38 | // CHECK-SAME: (%struct.ChildOverride* %[[THIS:.*]]) |
39 | // |
40 | // No need to adjust 'this' as the ChildOverride's layout begins with Left. |
41 | // CHECK: %[[THIS_ADDR:.*]] = alloca %struct.ChildOverride*, align 4 |
42 | // CHECK: store %struct.ChildOverride* %[[THIS]], %struct.ChildOverride** %[[THIS_ADDR]], align 4 |
43 | |
44 | foo(this); |
45 | // CHECK: %[[THIS:.*]] = load %struct.ChildOverride*, %struct.ChildOverride** %[[THIS_ADDR]] |
46 | // CHECK: %[[THIS_i8:.*]] = bitcast %struct.ChildOverride* %[[THIS]] to i8* |
47 | // CHECK: call void @foo(i8* %[[THIS_i8]]) |
48 | // CHECK: ret |
49 | } |
50 | |
51 | void call_left_override(ChildOverride *child) { |
52 | // CHECK-LABEL: define dso_local void @"?call_left_override |
53 | // CHECK: %[[CHILD:.*]] = load %struct.ChildOverride |
54 | |
55 | child->left(); |
56 | // CHECK: %[[VFPTR:.*]] = bitcast %struct.ChildOverride* %[[CHILD]] to void (%struct.ChildOverride*)*** |
57 | // CHECK: %[[VFTABLE:.*]] = load void (%struct.ChildOverride*)**, void (%struct.ChildOverride*)*** %[[VFPTR]] |
58 | // CHECK: %[[VFUN:.*]] = getelementptr inbounds void (%struct.ChildOverride*)*, void (%struct.ChildOverride*)** %[[VFTABLE]], i64 0 |
59 | // CHECK: %[[VFUN_VALUE:.*]] = load void (%struct.ChildOverride*)*, void (%struct.ChildOverride*)** %[[VFUN]] |
60 | // |
61 | // CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](%struct.ChildOverride* %[[CHILD]]) |
62 | // CHECK: ret |
63 | } |
64 | |
65 | void call_right_no_override(ChildNoOverride *child) { |
66 | // CHECK-LABEL: define dso_local void @"?call_right_no_override |
67 | // CHECK: %[[CHILD:.*]] = load %struct.ChildNoOverride |
68 | |
69 | child->right(); |
70 | // When calling a right base's virtual method, one needs to adjust 'this' at |
71 | // the caller site. |
72 | // |
73 | // CHECK: %[[CHILD_i8:.*]] = bitcast %struct.ChildNoOverride* %[[CHILD]] to i8* |
74 | // CHECK: %[[RIGHT_i8:.*]] = getelementptr inbounds i8, i8* %[[CHILD_i8]], i32 4 |
75 | // CHECK: %[[RIGHT:.*]] = bitcast i8* %[[RIGHT_i8]] to %struct.Right* |
76 | // |
77 | // CHECK: %[[VFPTR:.*]] = bitcast %struct.Right* %[[RIGHT]] to void (%struct.Right*)*** |
78 | // CHECK: %[[VFTABLE:.*]] = load void (%struct.Right*)**, void (%struct.Right*)*** %[[VFPTR]] |
79 | // CHECK: %[[VFUN:.*]] = getelementptr inbounds void (%struct.Right*)*, void (%struct.Right*)** %[[VFTABLE]], i64 0 |
80 | // CHECK: %[[VFUN_VALUE:.*]] = load void (%struct.Right*)*, void (%struct.Right*)** %[[VFUN]] |
81 | // CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](%struct.Right* %[[RIGHT]]) |
82 | // CHECK: ret |
83 | } |
84 | |
85 | void ChildOverride::right() { |
86 | // CHECK-LABEL: define dso_local x86_thiscallcc void @"?right@ChildOverride@@UAEXXZ"(i8* |
87 | // |
88 | // ChildOverride::right gets 'this' cast to Right* in ECX (i.e. this+4) so we |
89 | // need to adjust 'this' before use. |
90 | // |
91 | // CHECK: %[[THIS_STORE:.*]] = alloca %struct.ChildOverride*, align 4 |
92 | // CHECK: %[[THIS_ADDR:.*]] = alloca %struct.ChildOverride*, align 4 |
93 | // CHECK: %[[COERCE_VAL:.*]] = bitcast i8* %[[ECX:.*]] to %struct.ChildOverride* |
94 | // CHECK: store %struct.ChildOverride* %[[COERCE_VAL]], %struct.ChildOverride** %[[THIS_STORE]], align 4 |
95 | // CHECK: %[[THIS_INIT:.*]] = load %struct.ChildOverride*, %struct.ChildOverride** %[[THIS_STORE]], align 4 |
96 | // CHECK: store %struct.ChildOverride* %[[THIS_INIT]], %struct.ChildOverride** %[[THIS_ADDR]], align 4 |
97 | // CHECK: %[[THIS_RELOAD:.*]] = load %struct.ChildOverride*, %struct.ChildOverride** %[[THIS_ADDR]] |
98 | // CHECK: %[[THIS_i8:.*]] = bitcast %struct.ChildOverride* %[[THIS_RELOAD]] to i8* |
99 | // CHECK: %[[THIS_ADJUSTED:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 -4 |
100 | // CHECK: %[[THIS:.*]] = bitcast i8* %[[THIS_ADJUSTED]] to %struct.ChildOverride* |
101 | |
102 | foo(this); |
103 | // CHECK: %[[THIS_PARAM:.*]] = bitcast %struct.ChildOverride* %[[THIS]] to i8* |
104 | // CHECK: call void @foo(i8* %[[THIS_PARAM]]) |
105 | // CHECK: ret |
106 | } |
107 | |
108 | void call_right_override(ChildOverride *child) { |
109 | // CHECK-LABEL: define dso_local void @"?call_right_override |
110 | // CHECK: %[[CHILD:.*]] = load %struct.ChildOverride |
111 | |
112 | child->right(); |
113 | // When calling a right child's virtual method, one needs to adjust 'this' at |
114 | // the caller site. |
115 | // |
116 | // CHECK: %[[CHILD_i8:.*]] = bitcast %struct.ChildOverride* %[[CHILD]] to i8* |
117 | // CHECK: %[[RIGHT:.*]] = getelementptr inbounds i8, i8* %[[CHILD_i8]], i32 4 |
118 | // |
119 | // CHECK: %[[CHILD_i8:.*]] = bitcast %struct.ChildOverride* %[[CHILD]] to i8* |
120 | // CHECK: %[[VFPTR_i8:.*]] = getelementptr inbounds i8, i8* %[[CHILD_i8]], i32 4 |
121 | // CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VFPTR_i8]] to void (i8*)*** |
122 | // CHECK: %[[VFTABLE:.*]] = load void (i8*)**, void (i8*)*** %[[VFPTR]] |
123 | // CHECK: %[[VFUN:.*]] = getelementptr inbounds void (i8*)*, void (i8*)** %[[VFTABLE]], i64 0 |
124 | // CHECK: %[[VFUN_VALUE:.*]] = load void (i8*)*, void (i8*)** %[[VFUN]] |
125 | // |
126 | // CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](i8* %[[RIGHT]]) |
127 | // CHECK: ret |
128 | } |
129 | |
130 | struct GrandchildOverride : ChildOverride { |
131 | virtual void right(); |
132 | }; |
133 | |
134 | void GrandchildOverride::right() { |
135 | // CHECK-LABEL: define dso_local x86_thiscallcc void @"?right@GrandchildOverride@@UAEXXZ"(i8* |
136 | // |
137 | // CHECK: %[[THIS_STORE:.*]] = alloca %struct.GrandchildOverride*, align 4 |
138 | // CHECK: %[[THIS_ADDR:.*]] = alloca %struct.GrandchildOverride*, align 4 |
139 | // CHECK: %[[COERCE_VAL:.*]] = bitcast i8* %[[ECX:.*]] to %struct.GrandchildOverride* |
140 | // CHECK: store %struct.GrandchildOverride* %[[COERCE_VAL]], %struct.GrandchildOverride** %[[THIS_STORE]], align 4 |
141 | // CHECK: %[[THIS_INIT:.*]] = load %struct.GrandchildOverride*, %struct.GrandchildOverride** %[[THIS_STORE]], align 4 |
142 | // CHECK: store %struct.GrandchildOverride* %[[THIS_INIT]], %struct.GrandchildOverride** %[[THIS_ADDR]], align 4 |
143 | // CHECK: %[[THIS_RELOAD:.*]] = load %struct.GrandchildOverride*, %struct.GrandchildOverride** %[[THIS_ADDR]] |
144 | // CHECK: %[[THIS_i8:.*]] = bitcast %struct.GrandchildOverride* %[[THIS_RELOAD]] to i8* |
145 | // CHECK: %[[THIS_ADJUSTED:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 -4 |
146 | // CHECK: %[[THIS:.*]] = bitcast i8* %[[THIS_ADJUSTED]] to %struct.GrandchildOverride* |
147 | |
148 | foo(this); |
149 | // CHECK: %[[THIS_PARAM:.*]] = bitcast %struct.GrandchildOverride* %[[THIS]] to i8* |
150 | // CHECK: call void @foo(i8* %[[THIS_PARAM]]) |
151 | // CHECK: ret |
152 | } |
153 | |
154 | void call_grandchild_right(GrandchildOverride *obj) { |
155 | // Just make sure we don't crash. |
156 | obj->right(); |
157 | } |
158 | |
159 | void emit_ctors() { |
160 | Left l; |
161 | // CHECK-LABEL: define {{.*}} @"??0Left@@QAE@XZ" |
162 | // CHECK-NOT: getelementptr |
163 | // CHECK: store i32 (...)** bitcast ({ [1 x i8*] }* @"??_7Left@@6B@" to i32 (...)**) |
164 | // CHECK: ret |
165 | |
166 | Right r; |
167 | // CHECK-LABEL: define {{.*}} @"??0Right@@QAE@XZ" |
168 | // CHECK-NOT: getelementptr |
169 | // CHECK: store i32 (...)** bitcast ({ [1 x i8*] }* @"??_7Right@@6B@" to i32 (...)**) |
170 | // CHECK: ret |
171 | |
172 | ChildOverride co; |
173 | // CHECK-LABEL: define {{.*}} @"??0ChildOverride@@QAE@XZ" |
174 | // CHECK: %[[THIS:.*]] = load %struct.ChildOverride*, %struct.ChildOverride** |
175 | // CHECK: %[[VFPTR:.*]] = bitcast %struct.ChildOverride* %[[THIS]] to i32 (...)*** |
176 | // CHECK: store i32 (...)** bitcast ({ [1 x i8*] }* @"??_7ChildOverride@@6BLeft@@@" to i32 (...)**), i32 (...)*** %[[VFPTR]] |
177 | // CHECK: %[[THIS_i8:.*]] = bitcast %struct.ChildOverride* %[[THIS]] to i8* |
178 | // CHECK: %[[VFPTR_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 4 |
179 | // CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VFPTR_i8]] to i32 (...)*** |
180 | // CHECK: store i32 (...)** bitcast ({ [1 x i8*] }* @"??_7ChildOverride@@6BRight@@@" to i32 (...)**), i32 (...)*** %[[VFPTR]] |
181 | // CHECK: ret |
182 | |
183 | GrandchildOverride gc; |
184 | // CHECK-LABEL: define {{.*}} @"??0GrandchildOverride@@QAE@XZ" |
185 | // CHECK: %[[THIS:.*]] = load %struct.GrandchildOverride*, %struct.GrandchildOverride** |
186 | // CHECK: %[[VFPTR:.*]] = bitcast %struct.GrandchildOverride* %[[THIS]] to i32 (...)*** |
187 | // CHECK: store i32 (...)** bitcast ({ [1 x i8*] }* @"??_7GrandchildOverride@@6BLeft@@@" to i32 (...)**), i32 (...)*** %[[VFPTR]] |
188 | // CHECK: %[[THIS_i8:.*]] = bitcast %struct.GrandchildOverride* %[[THIS]] to i8* |
189 | // CHECK: %[[VFPTR_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 4 |
190 | // CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VFPTR_i8]] to i32 (...)*** |
191 | // CHECK: store i32 (...)** bitcast ({ [1 x i8*] }* @"??_7GrandchildOverride@@6BRight@@@" to i32 (...)**), i32 (...)*** %[[VFPTR]] |
192 | // CHECK: ret |
193 | } |
194 | |
195 | struct LeftWithNonVirtualDtor { |
196 | virtual void left(); |
197 | ~LeftWithNonVirtualDtor(); |
198 | }; |
199 | |
200 | struct AsymmetricChild : LeftWithNonVirtualDtor, Right { |
201 | virtual ~AsymmetricChild(); |
202 | }; |
203 | |
204 | void call_asymmetric_child_complete_dtor() { |
205 | // CHECK-LABEL: define dso_local void @"?call_asymmetric_child_complete_dtor@@YAXXZ" |
206 | AsymmetricChild obj; |
207 | // CHECK: call x86_thiscallcc %struct.AsymmetricChild* @"??0AsymmetricChild@@QAE@XZ"(%struct.AsymmetricChild* %[[OBJ:.*]]) |
208 | // CHECK-NOT: getelementptr |
209 | // CHECK: call x86_thiscallcc void @"??1AsymmetricChild@@UAE@XZ"(%struct.AsymmetricChild* %[[OBJ]]) |
210 | // CHECK: ret |
211 | } |
212 | |