| 1 | // RUN: %clang_cc1 %s -fblocks -triple x86_64-apple-darwin -emit-llvm -o - | FileCheck %s |
| 2 | |
| 3 | // CHECK: %[[STRUCT_BLOCK_DESCRIPTOR:.*]] = type { i64, i64 } |
| 4 | // CHECK: @[[BLOCK_DESCRIPTOR22:.*]] = internal constant { i64, i64, i8*, i8*, i8*, i8* } { i64 0, i64 36, i8* bitcast (void (i8*, i8*)* @__copy_helper_block_8_32c22_ZTSN12_GLOBAL__N_11BE to i8*), i8* bitcast (void (i8*)* @__destroy_helper_block_8_32c22_ZTSN12_GLOBAL__N_11BE to i8*), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @{{.*}}, i32 0, i32 0), i8* null }, align 8 |
| 5 | |
| 6 | namespace test0 { |
| 7 | // CHECK-LABEL: define void @_ZN5test04testEi( |
| 8 | // CHECK: define internal void @___ZN5test04testEi_block_invoke{{.*}}( |
| 9 | // CHECK: define internal void @___ZN5test04testEi_block_invoke_2{{.*}}( |
| 10 | void test(int x) { |
| 11 | ^{ ^{ (void) x; }; }; |
| 12 | } |
| 13 | } |
| 14 | |
| 15 | extern void (^out)(); |
| 16 | |
| 17 | namespace test1 { |
| 18 | // Capturing const objects doesn't require a local block. |
| 19 | // CHECK-LABEL: define void @_ZN5test15test1Ev() |
| 20 | // CHECK: store void ()* bitcast ({{.*}} @__block_literal_global{{.*}} to void ()*), void ()** @out |
| 21 | void test1() { |
| 22 | const int NumHorsemen = 4; |
| 23 | out = ^{ (void) NumHorsemen; }; |
| 24 | } |
| 25 | |
| 26 | // That applies to structs too... |
| 27 | // CHECK-LABEL: define void @_ZN5test15test2Ev() |
| 28 | // CHECK: store void ()* bitcast ({{.*}} @__block_literal_global{{.*}} to void ()*), void ()** @out |
| 29 | struct loc { double x, y; }; |
| 30 | void test2() { |
| 31 | const loc target = { 5, 6 }; |
| 32 | out = ^{ (void) target; }; |
| 33 | } |
| 34 | |
| 35 | // ...unless they have mutable fields... |
| 36 | // CHECK-LABEL: define void @_ZN5test15test3Ev() |
| 37 | // CHECK: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]], |
| 38 | // CHECK: [[T0:%.*]] = bitcast [[BLOCK_T]]* [[BLOCK]] to void ()* |
| 39 | // CHECK: store void ()* [[T0]], void ()** @out |
| 40 | struct mut { mutable int x; }; |
| 41 | void test3() { |
| 42 | const mut obj = { 5 }; |
| 43 | out = ^{ (void) obj; }; |
| 44 | } |
| 45 | |
| 46 | // ...or non-trivial destructors... |
| 47 | // CHECK-LABEL: define void @_ZN5test15test4Ev() |
| 48 | // CHECK: [[OBJ:%.*]] = alloca |
| 49 | // CHECK: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]], |
| 50 | // CHECK: [[T0:%.*]] = bitcast [[BLOCK_T]]* [[BLOCK]] to void ()* |
| 51 | // CHECK: store void ()* [[T0]], void ()** @out |
| 52 | struct scope { int x; ~scope(); }; |
| 53 | void test4() { |
| 54 | const scope obj = { 5 }; |
| 55 | out = ^{ (void) obj; }; |
| 56 | } |
| 57 | |
| 58 | // ...or non-trivial copy constructors, but it's not clear how to do |
| 59 | // that and still have a constant initializer in '03. |
| 60 | } |
| 61 | |
| 62 | namespace test2 { |
| 63 | struct A { |
| 64 | A(); |
| 65 | A(const A &); |
| 66 | ~A(); |
| 67 | }; |
| 68 | |
| 69 | struct B { |
| 70 | B(); |
| 71 | B(const B &); |
| 72 | ~B(); |
| 73 | }; |
| 74 | |
| 75 | // CHECK-LABEL: define void @_ZN5test24testEv() |
| 76 | void test() { |
| 77 | __block A a; |
| 78 | __block B b; |
| 79 | ^{ (void)a; (void)b; }; |
| 80 | } |
| 81 | |
| 82 | // CHECK-LABEL: define internal void @__Block_byref_object_copy |
| 83 | // CHECK: call void @_ZN5test21AC1ERKS0_( |
| 84 | |
| 85 | // CHECK-LABEL: define internal void @__Block_byref_object_dispose |
| 86 | // CHECK: call void @_ZN5test21AD1Ev( |
| 87 | |
| 88 | // CHECK-LABEL: define internal void @__Block_byref_object_copy |
| 89 | // CHECK: call void @_ZN5test21BC1ERKS0_( |
| 90 | |
| 91 | // CHECK-LABEL: define internal void @__Block_byref_object_dispose |
| 92 | // CHECK: call void @_ZN5test21BD1Ev( |
| 93 | } |
| 94 | |
| 95 | // rdar://problem/9334739 |
| 96 | // Make sure we mark destructors for parameters captured in blocks. |
| 97 | namespace test3 { |
| 98 | struct A { |
| 99 | A(const A&); |
| 100 | ~A(); |
| 101 | }; |
| 102 | |
| 103 | struct B : A { |
| 104 | }; |
| 105 | |
| 106 | void test(B b) { |
| 107 | extern void consume(void(^)()); |
| 108 | consume(^{ (void) b; }); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | // rdar://problem/9971485 |
| 113 | namespace test4 { |
| 114 | struct A { |
| 115 | A(); |
| 116 | ~A(); |
| 117 | }; |
| 118 | |
| 119 | void foo(A a); |
| 120 | |
| 121 | void test() { |
| 122 | extern void consume(void(^)()); |
| 123 | consume(^{ return foo(A()); }); |
| 124 | } |
| 125 | // CHECK-LABEL: define void @_ZN5test44testEv() |
| 126 | // CHECK-LABEL: define internal void @___ZN5test44testEv_block_invoke |
| 127 | // CHECK: [[TMP:%.*]] = alloca [[A:%.*]], align 1 |
| 128 | // CHECK-NEXT: store i8* [[BLOCKDESC:%.*]], i8** {{.*}}, align 8 |
| 129 | // CHECK-NEXT: bitcast i8* [[BLOCKDESC]] to <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]* }>* |
| 130 | // CHECK: call void @_ZN5test41AC1Ev([[A]]* [[TMP]]) |
| 131 | // CHECK-NEXT: call void @_ZN5test43fooENS_1AE([[A]]* [[TMP]]) |
| 132 | // CHECK-NEXT: call void @_ZN5test41AD1Ev([[A]]* [[TMP]]) |
| 133 | // CHECK-NEXT: ret void |
| 134 | } |
| 135 | |
| 136 | namespace test5 { |
| 137 | struct A { |
| 138 | unsigned afield; |
| 139 | A(); |
| 140 | A(const A&); |
| 141 | ~A(); |
| 142 | void foo() const; |
| 143 | }; |
| 144 | |
| 145 | void doWithBlock(void(^)()); |
| 146 | |
| 147 | void test(bool cond) { |
| 148 | A x; |
| 149 | void (^b)() = (cond ? ^{ x.foo(); } : (void(^)()) 0); |
| 150 | doWithBlock(b); |
| 151 | } |
| 152 | |
| 153 | // CHECK-LABEL: define void @_ZN5test54testEb( |
| 154 | // CHECK: [[COND:%.*]] = alloca i8 |
| 155 | // CHECK-NEXT: [[X:%.*]] = alloca [[A:%.*]], align 4 |
| 156 | // CHECK-NEXT: [[B:%.*]] = alloca void ()*, align 8 |
| 157 | // CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:.*]], align 8 |
| 158 | // CHECK-NEXT: [[CLEANUP_ACTIVE:%.*]] = alloca i1 |
| 159 | // CHECK-NEXT: [[T0:%.*]] = zext i1 |
| 160 | // CHECK-NEXT: store i8 [[T0]], i8* [[COND]], align 1 |
| 161 | // CHECK-NEXT: call void @_ZN5test51AC1Ev([[A]]* [[X]]) |
| 162 | // CHECK-NEXT: [[CLEANUP_ADDR:%.*]] = getelementptr inbounds [[BLOCK_T]], [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5 |
| 163 | // CHECK-NEXT: [[T0:%.*]] = load i8, i8* [[COND]], align 1 |
| 164 | // CHECK-NEXT: [[T1:%.*]] = trunc i8 [[T0]] to i1 |
| 165 | // CHECK-NEXT: store i1 false, i1* [[CLEANUP_ACTIVE]] |
| 166 | // CHECK-NEXT: br i1 [[T1]], |
| 167 | |
| 168 | // CHECK-NOT: br |
| 169 | // CHECK: [[CAPTURE:%.*]] = getelementptr inbounds [[BLOCK_T]], [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5 |
| 170 | // CHECK-NEXT: call void @_ZN5test51AC1ERKS0_([[A]]* [[CAPTURE]], [[A]]* dereferenceable({{[0-9]+}}) [[X]]) |
| 171 | // CHECK-NEXT: store i1 true, i1* [[CLEANUP_ACTIVE]] |
| 172 | // CHECK-NEXT: bitcast [[BLOCK_T]]* [[BLOCK]] to void ()* |
| 173 | // CHECK-NEXT: br label |
| 174 | // CHECK: br label |
| 175 | // CHECK: phi |
| 176 | // CHECK-NEXT: store |
| 177 | // CHECK-NEXT: load |
| 178 | // CHECK-NEXT: call void @_ZN5test511doWithBlockEU13block_pointerFvvE( |
| 179 | // CHECK-NEXT: [[T0:%.*]] = load i1, i1* [[CLEANUP_ACTIVE]] |
| 180 | // CHECK-NEXT: br i1 [[T0]] |
| 181 | // CHECK: call void @_ZN5test51AD1Ev([[A]]* [[CLEANUP_ADDR]]) |
| 182 | // CHECK-NEXT: br label |
| 183 | // CHECK: call void @_ZN5test51AD1Ev([[A]]* [[X]]) |
| 184 | // CHECK-NEXT: ret void |
| 185 | } |
| 186 | |
| 187 | namespace test6 { |
| 188 | struct A { |
| 189 | A(); |
| 190 | ~A(); |
| 191 | }; |
| 192 | |
| 193 | void foo(const A &, void (^)()); |
| 194 | void bar(); |
| 195 | |
| 196 | void test() { |
| 197 | // Make sure that the temporary cleanup isn't somehow captured |
| 198 | // within the block. |
| 199 | foo(A(), ^{ bar(); }); |
| 200 | bar(); |
| 201 | } |
| 202 | |
| 203 | // CHECK-LABEL: define void @_ZN5test64testEv() |
| 204 | // CHECK: [[TEMP:%.*]] = alloca [[A:%.*]], align 1 |
| 205 | // CHECK-NEXT: call void @_ZN5test61AC1Ev([[A]]* [[TEMP]]) |
| 206 | // CHECK-NEXT: call void @_ZN5test63fooERKNS_1AEU13block_pointerFvvE( |
| 207 | // CHECK-NEXT: call void @_ZN5test61AD1Ev([[A]]* [[TEMP]]) |
| 208 | // CHECK-NEXT: call void @_ZN5test63barEv() |
| 209 | // CHECK-NEXT: ret void |
| 210 | } |
| 211 | |
| 212 | namespace test7 { |
| 213 | int f() { |
| 214 | static int n; |
| 215 | int *const p = &n; |
| 216 | return ^{ return *p; }(); |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | namespace test8 { |
| 221 | // <rdar://problem/10832617>: failure to capture this after skipping rebuild |
| 222 | // of the 'this' pointer. |
| 223 | struct X { |
| 224 | int x; |
| 225 | |
| 226 | template<typename T> |
| 227 | int foo() { |
| 228 | return ^ { return x; }(); |
| 229 | } |
| 230 | }; |
| 231 | |
| 232 | template int X::foo<int>(); |
| 233 | } |
| 234 | |
| 235 | // rdar://13459289 |
| 236 | namespace test9 { |
| 237 | struct B { |
| 238 | void *p; |
| 239 | B(); |
| 240 | B(const B&); |
| 241 | ~B(); |
| 242 | }; |
| 243 | |
| 244 | void use_block(void (^)()); |
| 245 | void use_block_2(void (^)(), const B &a); |
| 246 | |
| 247 | // Ensuring that creating a non-trivial capture copy expression |
| 248 | // doesn't end up stealing the block registration for the block we |
| 249 | // just parsed. That block must have captures or else it won't |
| 250 | // force registration. Must occur within a block for some reason. |
| 251 | void test() { |
| 252 | B x; |
| 253 | use_block(^{ |
| 254 | int y; |
| 255 | use_block_2(^{ (void)y; }, x); |
| 256 | }); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | namespace test10 { |
| 261 | // Check that 'v' is included in the copy helper function name to indicate |
| 262 | // the constructor taking a volatile parameter is called to copy the captured |
| 263 | // object. |
| 264 | |
| 265 | // CHECK-LABEL: define linkonce_odr hidden void @__copy_helper_block_8_32c16_ZTSVN6test101BE( |
| 266 | // CHECK: call void @_ZN6test101BC1ERVKS0_( |
| 267 | // CHECK-LABEL: define linkonce_odr hidden void @__destroy_helper_block_8_32c16_ZTSVN6test101BE( |
| 268 | // CHECK: call void @_ZN6test101BD1Ev( |
| 269 | |
| 270 | struct B { |
| 271 | int a; |
| 272 | B(); |
| 273 | B(const B &); |
| 274 | B(const volatile B &); |
| 275 | ~B(); |
| 276 | }; |
| 277 | |
| 278 | void test() { |
| 279 | volatile B x; |
| 280 | ^{ (void)x; }; |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | // Copy/dispose helper functions and block descriptors of blocks that capture |
| 285 | // objects that are non-external and non-trivial have internal linkage. |
| 286 | |
| 287 | // CHECK-LABEL: define internal void @_ZN12_GLOBAL__N_14testEv( |
| 288 | // CHECK: store %[[STRUCT_BLOCK_DESCRIPTOR]]* bitcast ({ i64, i64, i8*, i8*, i8*, i8* }* @[[BLOCK_DESCRIPTOR22]] to %[[STRUCT_BLOCK_DESCRIPTOR]]*), %[[STRUCT_BLOCK_DESCRIPTOR]]** %{{.*}}, align 8 |
| 289 | |
| 290 | // CHECK-LABEL: define internal void @__copy_helper_block_8_32c22_ZTSN12_GLOBAL__N_11BE( |
| 291 | // CHECK-LABEL: define internal void @__destroy_helper_block_8_32c22_ZTSN12_GLOBAL__N_11BE( |
| 292 | |
| 293 | namespace { |
| 294 | struct B { |
| 295 | int a; |
| 296 | B(); |
| 297 | B(const B &); |
| 298 | ~B(); |
| 299 | }; |
| 300 | |
| 301 | void test() { |
| 302 | B x; |
| 303 | ^{ (void)x; }; |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | void callTest() { |
| 308 | test(); |
| 309 | } |
| 310 | |