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 -cxx-abi microsoft -fno-rtti | FileCheck -check-prefix WIN32 %s 3 // RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-pc-win32 -mconstructor-aliases -cxx-abi microsoft -fno-rtti | FileCheck -check-prefix WIN64 %s 4 5 struct Empty {}; 6 7 struct EmptyWithCtor { 8 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 { 21 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 // Returning structs that fit into a register. 51 Small small_return() { return Small(); } 52 // LINUX-LABEL: define void @_Z12small_returnv(%struct.Small* noalias sret %agg.result) 53 // WIN32: define i32 @"\01?small_return@@YA?AUSmall@@XZ"() 54 // WIN64: define i32 @"\01?small_return@@YA?AUSmall@@XZ"() 55 56 Medium medium_return() { return Medium(); } 57 // LINUX-LABEL: define void @_Z13medium_returnv(%struct.Medium* noalias sret %agg.result) 58 // WIN32: define i64 @"\01?medium_return@@YA?AUMedium@@XZ"() 59 // WIN64: define i64 @"\01?medium_return@@YA?AUMedium@@XZ"() 60 61 // Returning structs that fit into a register but are not POD. 62 SmallCpp11NotCpp03Pod small_non_pod_return() { return SmallCpp11NotCpp03Pod(); } 63 // LINUX-LABEL: define void @_Z20small_non_pod_returnv(%struct.SmallCpp11NotCpp03Pod* noalias sret %agg.result) 64 // WIN32: define void @"\01?small_non_pod_return@@YA?AUSmallCpp11NotCpp03Pod@@XZ"(%struct.SmallCpp11NotCpp03Pod* noalias sret %agg.result) 65 // WIN64: define void @"\01?small_non_pod_return@@YA?AUSmallCpp11NotCpp03Pod@@XZ"(%struct.SmallCpp11NotCpp03Pod* noalias sret %agg.result) 66 67 SmallWithCtor small_with_ctor_return() { return SmallWithCtor(); } 68 // LINUX-LABEL: define void @_Z22small_with_ctor_returnv(%struct.SmallWithCtor* noalias sret %agg.result) 69 // WIN32: define void @"\01?small_with_ctor_return@@YA?AUSmallWithCtor@@XZ"(%struct.SmallWithCtor* noalias sret %agg.result) 70 // WIN64: define void @"\01?small_with_ctor_return@@YA?AUSmallWithCtor@@XZ"(%struct.SmallWithCtor* noalias sret %agg.result) 71 72 SmallWithVftable small_with_vftable_return() { return SmallWithVftable(); } 73 // LINUX-LABEL: define void @_Z25small_with_vftable_returnv(%struct.SmallWithVftable* noalias sret %agg.result) 74 // WIN32: define void @"\01?small_with_vftable_return@@YA?AUSmallWithVftable@@XZ"(%struct.SmallWithVftable* noalias sret %agg.result) 75 // WIN64: define void @"\01?small_with_vftable_return@@YA?AUSmallWithVftable@@XZ"(%struct.SmallWithVftable* noalias sret %agg.result) 76 77 MediumWithCopyCtor medium_with_copy_ctor_return() { return MediumWithCopyCtor(); } 78 // LINUX-LABEL: define void @_Z28medium_with_copy_ctor_returnv(%struct.MediumWithCopyCtor* noalias sret %agg.result) 79 // WIN32: define void @"\01?medium_with_copy_ctor_return@@YA?AUMediumWithCopyCtor@@XZ"(%struct.MediumWithCopyCtor* noalias sret %agg.result) 80 // WIN64: define void @"\01?medium_with_copy_ctor_return@@YA?AUMediumWithCopyCtor@@XZ"(%struct.MediumWithCopyCtor* noalias sret %agg.result) 81 82 // Returning a large struct that doesn't fit into a register. 83 Big big_return() { return Big(); } 84 // LINUX-LABEL: define void @_Z10big_returnv(%struct.Big* noalias sret %agg.result) 85 // WIN32: define void @"\01?big_return@@YA?AUBig@@XZ"(%struct.Big* noalias sret %agg.result) 86 // WIN64: define void @"\01?big_return@@YA?AUBig@@XZ"(%struct.Big* noalias sret %agg.result) 87 88 89 void small_arg(Small s) {} 90 // LINUX-LABEL: define void @_Z9small_arg5Small(%struct.Small* byval align 4 %s) 91 // WIN32: define void @"\01?small_arg@@YAXUSmall@@@Z"(%struct.Small* byval align 4 %s) 92 // WIN64: define void @"\01?small_arg@@YAXUSmall@@@Z"(i32 %s.coerce) 93 94 void medium_arg(Medium s) {} 95 // LINUX-LABEL: define void @_Z10medium_arg6Medium(%struct.Medium* byval align 4 %s) 96 // WIN32: define void @"\01?medium_arg@@YAXUMedium@@@Z"(%struct.Medium* byval align 4 %s) 97 // WIN64: define void @"\01?medium_arg@@YAXUMedium@@@Z"(i64 %s.coerce) 98 99 void small_arg_with_ctor(SmallWithCtor s) {} 100 // LINUX-LABEL: define void @_Z19small_arg_with_ctor13SmallWithCtor(%struct.SmallWithCtor* byval align 4 %s) 101 // WIN32: define void @"\01?small_arg_with_ctor@@YAXUSmallWithCtor@@@Z"(%struct.SmallWithCtor* byval align 4 %s) 102 // WIN64: define void @"\01?small_arg_with_ctor@@YAXUSmallWithCtor@@@Z"(i32 %s.coerce) 103 104 // Test that dtors are invoked in the callee. 105 void small_arg_with_dtor(SmallWithDtor s) {} 106 // WIN32: define void @"\01?small_arg_with_dtor@@YAXUSmallWithDtor@@@Z"(%struct.SmallWithDtor* byval align 4 %s) {{.*}} { 107 // WIN32: call x86_thiscallcc void @"\01??1SmallWithDtor@@QAE@XZ"(%struct.SmallWithDtor* %s) 108 // WIN32: } 109 // WIN64: define void @"\01?small_arg_with_dtor@@YAXUSmallWithDtor@@@Z"(%struct.SmallWithDtor* byval %s) {{.*}} { 110 // WIN64: call void @"\01??1SmallWithDtor@@QEAA@XZ"(%struct.SmallWithDtor* %s) 111 // WIN64: } 112 113 // Test that references aren't destroyed in the callee. 114 void ref_small_arg_with_dtor(const SmallWithDtor &s) { } 115 // WIN32: define void @"\01?ref_small_arg_with_dtor@@YAXABUSmallWithDtor@@@Z"(%struct.SmallWithDtor* %s) {{.*}} { 116 // WIN32-NOT: call x86_thiscallcc void @"\01??1SmallWithDtor@@QAE@XZ" 117 // WIN32: } 118 119 // Test that temporaries passed by reference are destroyed in the caller. 120 void temporary_ref_with_dtor() { 121 ref_small_arg_with_dtor(SmallWithDtor()); 122 } 123 // WIN32: define void @"\01?temporary_ref_with_dtor@@YAXXZ"() {{.*}} { 124 // WIN32: call x86_thiscallcc %struct.SmallWithDtor* @"\01??0SmallWithDtor@@QAE@XZ" 125 // WIN32: call void @"\01?ref_small_arg_with_dtor@@YAXABUSmallWithDtor@@@Z" 126 // WIN32: call x86_thiscallcc void @"\01??1SmallWithDtor@@QAE@XZ" 127 // WIN32: } 128 129 void takes_two_by_val_with_dtor(SmallWithDtor a, SmallWithDtor b); 130 void eh_cleanup_arg_with_dtor() { 131 takes_two_by_val_with_dtor(SmallWithDtor(), SmallWithDtor()); 132 } 133 // When exceptions are off, we don't have any cleanups. See 134 // microsoft-abi-exceptions.cpp for these cleanups. 135 // WIN32: define void @"\01?eh_cleanup_arg_with_dtor@@YAXXZ"() {{.*}} { 136 // WIN32: call x86_thiscallcc %struct.SmallWithDtor* @"\01??0SmallWithDtor@@QAE@XZ" 137 // WIN32: call x86_thiscallcc %struct.SmallWithDtor* @"\01??0SmallWithDtor@@QAE@XZ" 138 // WIN32: call void @"\01?takes_two_by_val_with_dtor@@YAXUSmallWithDtor@@0@Z" 139 // WIN32-NOT: call x86_thiscallcc void @"\01??1SmallWithDtor@@QAE@XZ" 140 // WIN32: } 141 142 void small_arg_with_vftable(SmallWithVftable s) {} 143 // LINUX-LABEL: define void @_Z22small_arg_with_vftable16SmallWithVftable(%struct.SmallWithVftable* %s) 144 // WIN32: define void @"\01?small_arg_with_vftable@@YAXUSmallWithVftable@@@Z"(%struct.SmallWithVftable* byval align 4 %s) 145 // WIN64: define void @"\01?small_arg_with_vftable@@YAXUSmallWithVftable@@@Z"(%struct.SmallWithVftable* byval %s) 146 147 void medium_arg_with_copy_ctor(MediumWithCopyCtor s) {} 148 // LINUX-LABEL: define void @_Z25medium_arg_with_copy_ctor18MediumWithCopyCtor(%struct.MediumWithCopyCtor* %s) 149 // WIN32: define void @"\01?medium_arg_with_copy_ctor@@YAXUMediumWithCopyCtor@@@Z"(%struct.MediumWithCopyCtor* byval align 4 %s) 150 // WIN64: define void @"\01?medium_arg_with_copy_ctor@@YAXUMediumWithCopyCtor@@@Z"(%struct.MediumWithCopyCtor* byval %s) 151 152 void big_arg(Big s) {} 153 // LINUX-LABEL: define void @_Z7big_arg3Big(%struct.Big* byval align 4 %s) 154 // WIN32: define void @"\01?big_arg@@YAXUBig@@@Z"(%struct.Big* byval align 4 %s) 155 // WIN64: define void @"\01?big_arg@@YAXUBig@@@Z"(%struct.Big* %s) 156 157 // FIXME: Add WIN64 tests. Currently, even the method manglings are wrong (sic!). 158 class Class { 159 public: 160 Small thiscall_method_small() { return Small(); } 161 // LINUX: define {{.*}} void @_ZN5Class21thiscall_method_smallEv(%struct.Small* noalias sret %agg.result, %class.Class* %this) 162 // WIN32: define {{.*}} x86_thiscallcc void @"\01?thiscall_method_small@Class@@QAE?AUSmall@@XZ"(%struct.Small* noalias sret %agg.result, %class.Class* %this) 163 164 SmallWithCtor thiscall_method_small_with_ctor() { return SmallWithCtor(); } 165 // LINUX: define {{.*}} void @_ZN5Class31thiscall_method_small_with_ctorEv(%struct.SmallWithCtor* noalias sret %agg.result, %class.Class* %this) 166 // WIN32: define {{.*}} x86_thiscallcc void @"\01?thiscall_method_small_with_ctor@Class@@QAE?AUSmallWithCtor@@XZ"(%struct.SmallWithCtor* noalias sret %agg.result, %class.Class* %this) 167 168 Small __cdecl cdecl_method_small() { return Small(); } 169 // LINUX: define {{.*}} void @_ZN5Class18cdecl_method_smallEv(%struct.Small* noalias sret %agg.result, %class.Class* %this) 170 // FIXME: Interesting, cdecl returns structures differently for instance 171 // methods and global functions. This is not supported by Clang yet... 172 // FIXME: Replace WIN32-NOT with WIN32 when this is fixed. 173 // WIN32-NOT: define {{.*}} void @"\01?cdecl_method_small@Class@@QAA?AUSmall@@XZ"(%struct.Small* noalias sret %agg.result, %class.Class* %this) 174 175 Big __cdecl cdecl_method_big() { return Big(); } 176 // LINUX: define {{.*}} void @_ZN5Class16cdecl_method_bigEv(%struct.Big* noalias sret %agg.result, %class.Class* %this) 177 // WIN32: define {{.*}} void @"\01?cdecl_method_big@Class@@QAA?AUBig@@XZ"(%struct.Big* noalias sret %agg.result, %class.Class* %this) 178 179 void thiscall_method_arg(Empty s) {} 180 // LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE5Empty(%class.Class* %this) 181 // WIN32: define {{.*}} void @"\01?thiscall_method_arg@Class@@QAEXUEmpty@@@Z"(%class.Class* %this, %struct.Empty* byval align 4 %s) 182 183 void thiscall_method_arg(EmptyWithCtor s) {} 184 // LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE13EmptyWithCtor(%class.Class* %this) 185 // WIN32: define {{.*}} void @"\01?thiscall_method_arg@Class@@QAEXUEmptyWithCtor@@@Z"(%class.Class* %this, %struct.EmptyWithCtor* byval align 4 %s) 186 187 void thiscall_method_arg(Small s) {} 188 // LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE5Small(%class.Class* %this, %struct.Small* byval align 4 %s) 189 // WIN32: define {{.*}} void @"\01?thiscall_method_arg@Class@@QAEXUSmall@@@Z"(%class.Class* %this, %struct.Small* byval align 4 %s) 190 191 void thiscall_method_arg(SmallWithCtor s) {} 192 // LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE13SmallWithCtor(%class.Class* %this, %struct.SmallWithCtor* byval align 4 %s) 193 // WIN32: define {{.*}} void @"\01?thiscall_method_arg@Class@@QAEXUSmallWithCtor@@@Z"(%class.Class* %this, %struct.SmallWithCtor* byval align 4 %s) 194 195 void thiscall_method_arg(Big s) {} 196 // LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE3Big(%class.Class* %this, %struct.Big* byval align 4 %s) 197 // WIN32: define {{.*}} void @"\01?thiscall_method_arg@Class@@QAEXUBig@@@Z"(%class.Class* %this, %struct.Big* byval align 4 %s) 198 }; 199 200 void use_class() { 201 Class c; 202 c.thiscall_method_small(); 203 c.thiscall_method_small_with_ctor(); 204 205 c.cdecl_method_small(); 206 c.cdecl_method_big(); 207 208 c.thiscall_method_arg(Empty()); 209 c.thiscall_method_arg(EmptyWithCtor()); 210 c.thiscall_method_arg(Small()); 211 c.thiscall_method_arg(SmallWithCtor()); 212 c.thiscall_method_arg(Big()); 213 } 214 215 struct X { 216 X(); 217 ~X(); 218 }; 219 void g(X) { 220 } 221 // WIN32: define void @"\01?g@@YAXUX@@@Z"(%struct.X* byval align 4) {{.*}} { 222 // WIN32: call x86_thiscallcc void @"\01??1X@@QAE@XZ"(%struct.X* %0) 223 // WIN32: } 224 void f() { 225 g(X()); 226 } 227 // WIN32: define void @"\01?f@@YAXXZ"() {{.*}} { 228 // WIN32-NOT: call {{.*}} @"\01??1X@@QAE@XZ" 229 // WIN32: } 230