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: define void @"\01?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: define x86_thiscallcc void @"\01?left@ChildOverride@@UAEXXZ"(%struct.ChildOverride* %[[THIS:.*]]) 38 // 39 // No need to adjust 'this' as the ChildOverride's layout begins with Left. 40 // CHECK: %[[THIS_ADDR:.*]] = alloca %struct.ChildOverride*, align 4 41 // CHECK: store %struct.ChildOverride* %[[THIS]], %struct.ChildOverride** %[[THIS_ADDR]], align 4 42 43 foo(this); 44 // CHECK: %[[THIS:.*]] = load %struct.ChildOverride*, %struct.ChildOverride** %[[THIS_ADDR]] 45 // CHECK: %[[THIS_i8:.*]] = bitcast %struct.ChildOverride* %[[THIS]] to i8* 46 // CHECK: call void @foo(i8* %[[THIS_i8]]) 47 // CHECK: ret 48 } 49 50 void call_left_override(ChildOverride *child) { 51 // CHECK: define void @"\01?call_left_override 52 // CHECK: %[[CHILD:.*]] = load %struct.ChildOverride 53 54 child->left(); 55 // CHECK: %[[VFPTR:.*]] = bitcast %struct.ChildOverride* %[[CHILD]] to void (%struct.ChildOverride*)*** 56 // CHECK: %[[VFTABLE:.*]] = load void (%struct.ChildOverride*)**, void (%struct.ChildOverride*)*** %[[VFPTR]] 57 // CHECK: %[[VFUN:.*]] = getelementptr inbounds void (%struct.ChildOverride*)*, void (%struct.ChildOverride*)** %[[VFTABLE]], i64 0 58 // CHECK: %[[VFUN_VALUE:.*]] = load void (%struct.ChildOverride*)*, void (%struct.ChildOverride*)** %[[VFUN]] 59 // 60 // CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](%struct.ChildOverride* %[[CHILD]]) 61 // CHECK: ret 62 } 63 64 void call_right_no_override(ChildNoOverride *child) { 65 // CHECK: define void @"\01?call_right_no_override 66 // CHECK: %[[CHILD:.*]] = load %struct.ChildNoOverride 67 68 child->right(); 69 // When calling a right base's virtual method, one needs to adjust 'this' at 70 // the caller site. 71 // 72 // CHECK: %[[CHILD_i8:.*]] = bitcast %struct.ChildNoOverride* %[[CHILD]] to i8* 73 // CHECK: %[[RIGHT_i8:.*]] = getelementptr inbounds i8, i8* %[[CHILD_i8]], i32 4 74 // CHECK: %[[RIGHT:.*]] = bitcast i8* %[[RIGHT_i8]] to %struct.Right* 75 // 76 // CHECK: %[[VFPTR:.*]] = bitcast %struct.Right* %[[RIGHT]] to void (%struct.Right*)*** 77 // CHECK: %[[VFTABLE:.*]] = load void (%struct.Right*)**, void (%struct.Right*)*** %[[VFPTR]] 78 // CHECK: %[[VFUN:.*]] = getelementptr inbounds void (%struct.Right*)*, void (%struct.Right*)** %[[VFTABLE]], i64 0 79 // CHECK: %[[VFUN_VALUE:.*]] = load void (%struct.Right*)*, void (%struct.Right*)** %[[VFUN]] 80 // CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](%struct.Right* %[[RIGHT]]) 81 // CHECK: ret 82 } 83 84 void ChildOverride::right() { 85 // CHECK: define x86_thiscallcc void @"\01?right@ChildOverride@@UAEXXZ"(i8* 86 // 87 // ChildOverride::right gets 'this' cast to Right* in ECX (i.e. this+4) so we 88 // need to adjust 'this' before use. 89 // 90 // CHECK: %[[THIS_ADDR:.*]] = alloca %struct.ChildOverride*, align 4 91 // CHECK: %[[THIS_i8:.*]] = getelementptr inbounds i8, i8* %[[ECX:.*]], i32 -4 92 // CHECK: %[[THIS:.*]] = bitcast i8* %[[THIS_i8]] to %struct.ChildOverride* 93 // CHECK: store %struct.ChildOverride* %[[THIS]], %struct.ChildOverride** %[[THIS_ADDR]], align 4 94 95 foo(this); 96 // CHECK: %[[THIS:.*]] = load %struct.ChildOverride*, %struct.ChildOverride** %[[THIS_ADDR]] 97 // CHECK: %[[THIS_PARAM:.*]] = bitcast %struct.ChildOverride* %[[THIS]] to i8* 98 // CHECK: call void @foo(i8* %[[THIS_PARAM]]) 99 // CHECK: ret 100 } 101 102 void call_right_override(ChildOverride *child) { 103 // CHECK: define void @"\01?call_right_override 104 // CHECK: %[[CHILD:.*]] = load %struct.ChildOverride 105 106 child->right(); 107 // When calling a right child's virtual method, one needs to adjust 'this' at 108 // the caller site. 109 // 110 // CHECK: %[[CHILD_i8:.*]] = bitcast %struct.ChildOverride* %[[CHILD]] to i8* 111 // 112 // CHECK: %[[VFPTR_i8:.*]] = getelementptr inbounds i8, i8* %[[CHILD_i8]], i32 4 113 // CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VFPTR_i8]] to void (i8*)*** 114 // CHECK: %[[VFTABLE:.*]] = load void (i8*)**, void (i8*)*** %[[VFPTR]] 115 // CHECK: %[[VFUN:.*]] = getelementptr inbounds void (i8*)*, void (i8*)** %[[VFTABLE]], i64 0 116 // CHECK: %[[VFUN_VALUE:.*]] = load void (i8*)*, void (i8*)** %[[VFUN]] 117 // 118 // CHECK: %[[CHILD_i8:.*]] = bitcast %struct.ChildOverride* %[[CHILD]] to i8* 119 // CHECK: %[[RIGHT:.*]] = getelementptr inbounds i8, i8* %[[CHILD_i8]], i32 4 120 // 121 // CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](i8* %[[RIGHT]]) 122 // CHECK: ret 123 } 124 125 struct GrandchildOverride : ChildOverride { 126 virtual void right(); 127 }; 128 129 void GrandchildOverride::right() { 130 // CHECK: define x86_thiscallcc void @"\01?right@GrandchildOverride@@UAEXXZ"(i8* 131 // 132 // CHECK: %[[THIS_ADDR:.*]] = alloca %struct.GrandchildOverride*, align 4 133 // CHECK: %[[THIS_i8:.*]] = getelementptr inbounds i8, i8* %[[ECX:.*]], i32 -4 134 // CHECK: %[[THIS:.*]] = bitcast i8* %[[THIS_i8]] to %struct.GrandchildOverride* 135 // CHECK: store %struct.GrandchildOverride* %[[THIS]], %struct.GrandchildOverride** %[[THIS_ADDR]], align 4 136 137 foo(this); 138 // CHECK: %[[THIS:.*]] = load %struct.GrandchildOverride*, %struct.GrandchildOverride** %[[THIS_ADDR]] 139 // CHECK: %[[THIS_PARAM:.*]] = bitcast %struct.GrandchildOverride* %[[THIS]] to i8* 140 // CHECK: call void @foo(i8* %[[THIS_PARAM]]) 141 // CHECK: ret 142 } 143 144 void call_grandchild_right(GrandchildOverride *obj) { 145 // Just make sure we don't crash. 146 obj->right(); 147 } 148 149 void emit_ctors() { 150 Left l; 151 // CHECK: define {{.*}} @"\01??0Left@@QAE@XZ" 152 // CHECK-NOT: getelementptr 153 // CHECK: store i32 (...)** bitcast ([1 x i8*]* @"\01??_7Left@@6B@" to i32 (...)**) 154 // CHECK: ret 155 156 Right r; 157 // CHECK: define {{.*}} @"\01??0Right@@QAE@XZ" 158 // CHECK-NOT: getelementptr 159 // CHECK: store i32 (...)** bitcast ([1 x i8*]* @"\01??_7Right@@6B@" to i32 (...)**) 160 // CHECK: ret 161 162 ChildOverride co; 163 // CHECK: define {{.*}} @"\01??0ChildOverride@@QAE@XZ" 164 // CHECK: %[[THIS:.*]] = load %struct.ChildOverride*, %struct.ChildOverride** 165 // CHECK: %[[VFPTR:.*]] = bitcast %struct.ChildOverride* %[[THIS]] to i32 (...)*** 166 // CHECK: store i32 (...)** bitcast ([1 x i8*]* @"\01??_7ChildOverride@@6BLeft@@@" to i32 (...)**), i32 (...)*** %[[VFPTR]] 167 // CHECK: %[[THIS_i8:.*]] = bitcast %struct.ChildOverride* %[[THIS]] to i8* 168 // CHECK: %[[VFPTR_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 4 169 // CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VFPTR_i8]] to i32 (...)*** 170 // CHECK: store i32 (...)** bitcast ([1 x i8*]* @"\01??_7ChildOverride@@6BRight@@@" to i32 (...)**), i32 (...)*** %[[VFPTR]] 171 // CHECK: ret 172 173 GrandchildOverride gc; 174 // CHECK: define {{.*}} @"\01??0GrandchildOverride@@QAE@XZ" 175 // CHECK: %[[THIS:.*]] = load %struct.GrandchildOverride*, %struct.GrandchildOverride** 176 // CHECK: %[[VFPTR:.*]] = bitcast %struct.GrandchildOverride* %[[THIS]] to i32 (...)*** 177 // CHECK: store i32 (...)** bitcast ([1 x i8*]* @"\01??_7GrandchildOverride@@6BLeft@@@" to i32 (...)**), i32 (...)*** %[[VFPTR]] 178 // CHECK: %[[THIS_i8:.*]] = bitcast %struct.GrandchildOverride* %[[THIS]] to i8* 179 // CHECK: %[[VFPTR_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 4 180 // CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VFPTR_i8]] to i32 (...)*** 181 // CHECK: store i32 (...)** bitcast ([1 x i8*]* @"\01??_7GrandchildOverride@@6BRight@@@" to i32 (...)**), i32 (...)*** %[[VFPTR]] 182 // CHECK: ret 183 } 184 185 struct LeftWithNonVirtualDtor { 186 virtual void left(); 187 ~LeftWithNonVirtualDtor(); 188 }; 189 190 struct AsymmetricChild : LeftWithNonVirtualDtor, Right { 191 virtual ~AsymmetricChild(); 192 }; 193 194 void call_asymmetric_child_complete_dtor() { 195 // CHECK-LABEL: define void @"\01?call_asymmetric_child_complete_dtor@@YAXXZ" 196 AsymmetricChild obj; 197 // CHECK: call x86_thiscallcc %struct.AsymmetricChild* @"\01??0AsymmetricChild@@QAE@XZ"(%struct.AsymmetricChild* %[[OBJ:.*]]) 198 // CHECK-NOT: getelementptr 199 // CHECK: call x86_thiscallcc void @"\01??1AsymmetricChild@@UAE@XZ"(%struct.AsymmetricChild* %[[OBJ]]) 200 // CHECK: ret 201 } 202
