| 1 | // RUN: %clang_cc1 -triple x86_64-apple-darwin -fblocks -emit-llvm -o - %s | FileCheck -check-prefix CHECK -check-prefix CHECK-NOARC %s |
| 2 | // RUN: %clang_cc1 -triple x86_64-apple-darwin -fblocks -emit-llvm -fobjc-arc -o - %s | FileCheck -check-prefix CHECK -check-prefix CHECK-ARC %s |
| 3 | |
| 4 | typedef void (^BlockTy)(void); |
| 5 | |
| 6 | union U { |
| 7 | int *i; |
| 8 | long long *ll; |
| 9 | } __attribute__((transparent_union)); |
| 10 | |
| 11 | void escapingFunc0(BlockTy); |
| 12 | void noescapeFunc0(id, __attribute__((noescape)) BlockTy); |
| 13 | void noescapeFunc1(__attribute__((noescape)) int *); |
| 14 | void noescapeFunc2(__attribute__((noescape)) id); |
| 15 | void noescapeFunc3(__attribute__((noescape)) union U); |
| 16 | |
| 17 | // Block descriptors of non-escaping blocks don't need pointers to copy/dispose |
| 18 | // helper functions. |
| 19 | |
| 20 | // CHECK: %[[STRUCT_BLOCK_DESCRIPTOR:.*]] = type { i64, i64 } |
| 21 | |
| 22 | // When the block is non-escaping, copy/dispose helpers aren't generated, so the |
| 23 | // block layout string must include information about __strong captures. |
| 24 | |
| 25 | // CHECK-NOARC: %[[STRUCT_BLOCK_BYREF_B0:.*]] = type { i8*, %[[STRUCT_BLOCK_BYREF_B0]]*, i32, i32, i8*, %[[STRUCT_S0:.*]] } |
| 26 | // CHECK-ARC: %[[STRUCT_BLOCK_BYREF_B0:.*]] = type { i8*, %[[STRUCT_BLOCK_BYREF_B0]]*, i32, i32, i8*, i8*, i8*, %[[STRUCT_S0:.*]] } |
| 27 | // CHECK: %[[STRUCT_S0]] = type { i8*, i8* } |
| 28 | // CHECK: @[[BLOCK_DESCIPTOR_TMP_2:.*ls32l8"]] = linkonce_odr hidden unnamed_addr constant { i64, i64, i8*, i64 } { i64 0, i64 40, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @{{.*}}, i32 0, i32 0), i64 256 }, align 8 |
| 29 | |
| 30 | // CHECK-LABEL: define void @test0( |
| 31 | // CHECK: call void @noescapeFunc0({{.*}}, {{.*}} nocapture {{.*}}) |
| 32 | // CHECK: declare void @noescapeFunc0(i8*, {{.*}} nocapture) |
| 33 | void test0(BlockTy b) { |
| 34 | noescapeFunc0(0, b); |
| 35 | } |
| 36 | |
| 37 | // CHECK-LABEL: define void @test1( |
| 38 | // CHECK: call void @noescapeFunc1({{.*}} nocapture {{.*}}) |
| 39 | // CHECK: declare void @noescapeFunc1({{.*}} nocapture) |
| 40 | void test1(int *i) { |
| 41 | noescapeFunc1(i); |
| 42 | } |
| 43 | |
| 44 | // CHECK-LABEL: define void @test2( |
| 45 | // CHECK: call void @noescapeFunc2({{.*}} nocapture {{.*}}) |
| 46 | // CHECK: declare void @noescapeFunc2({{.*}} nocapture) |
| 47 | void test2(id i) { |
| 48 | noescapeFunc2(i); |
| 49 | } |
| 50 | |
| 51 | // CHECK-LABEL: define void @test3( |
| 52 | // CHECK: call void @noescapeFunc3({{.*}} nocapture {{.*}}) |
| 53 | // CHECK: declare void @noescapeFunc3({{.*}} nocapture) |
| 54 | void test3(union U u) { |
| 55 | noescapeFunc3(u); |
| 56 | } |
| 57 | |
| 58 | // CHECK: define internal void @"\01-[C0 m0:]"({{.*}}, {{.*}}, {{.*}} nocapture {{.*}}) |
| 59 | |
| 60 | // CHECK-LABEL: define void @test4( |
| 61 | // CHECK: call void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to void (i8*, i8*, i32*)*)(i8* {{.*}}, i8* {{.*}}, i32* nocapture {{.*}}) |
| 62 | |
| 63 | @interface C0 |
| 64 | -(void) m0:(int*)__attribute__((noescape)) p0; |
| 65 | @end |
| 66 | |
| 67 | @implementation C0 |
| 68 | -(void) m0:(int*)__attribute__((noescape)) p0 { |
| 69 | } |
| 70 | @end |
| 71 | |
| 72 | void test4(C0 *c0, int *p) { |
| 73 | [c0 m0:p]; |
| 74 | } |
| 75 | |
| 76 | // CHECK-LABEL: define void @test5( |
| 77 | // CHECK: call void {{.*}}(i8* bitcast ({ i8**, i32, i32, i8*, {{.*}} }* @{{.*}} to i8*), i32* nocapture {{.*}}) |
| 78 | // CHECK: call void {{.*}}(i8* {{.*}}, i32* nocapture {{.*}}) |
| 79 | // CHECK: define internal void @{{.*}}(i8* {{.*}}, i32* nocapture {{.*}}) |
| 80 | |
| 81 | typedef void (^BlockTy2)(__attribute__((noescape)) int *); |
| 82 | |
| 83 | void test5(BlockTy2 b, int *p) { |
| 84 | ^(int *__attribute__((noescape)) p0){}(p); |
| 85 | b(p); |
| 86 | } |
| 87 | |
| 88 | // If the block is non-escaping, set the BLOCK_IS_NOESCAPE and BLOCK_IS_GLOBAL |
| 89 | // bits of field 'flags' and set the 'isa' field to 'NSConcreteGlobalBlock'. |
| 90 | |
| 91 | // CHECK: define void @test6(i8* %{{.*}}, i8* %[[B:.*]]) |
| 92 | // CHECK: %{{.*}} = alloca i8*, align 8 |
| 93 | // CHECK: %[[B_ADDR:.*]] = alloca i8*, align 8 |
| 94 | // CHECK: %[[BLOCK:.*]] = alloca <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>, align 8 |
| 95 | // CHECK-NOARC: store i8* %[[B]], i8** %[[B_ADDR]], align 8 |
| 96 | // CHECK-ARC: store i8* null, i8** %[[B_ADDR]], align 8 |
| 97 | // CHECK-ARC: call void @llvm.objc.storeStrong(i8** %[[B_ADDR]], i8* %[[B]]) |
| 98 | // CHECK-ARC: %[[V0:.*]] = getelementptr inbounds <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>, <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>* %[[BLOCK]], i32 0, i32 5 |
| 99 | // CHECK: %[[BLOCK_ISA:.*]] = getelementptr inbounds <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>, <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>* %[[BLOCK]], i32 0, i32 0 |
| 100 | // CHECK: store i8* bitcast (i8** @_NSConcreteGlobalBlock to i8*), i8** %[[BLOCK_ISA]], align 8 |
| 101 | // CHECK: %[[BLOCK_FLAGS:.*]] = getelementptr inbounds <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>, <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>* %[[BLOCK]], i32 0, i32 1 |
| 102 | // CHECK: store i32 -796917760, i32* %[[BLOCK_FLAGS]], align 8 |
| 103 | // CHECK: %[[BLOCK_DESCRIPTOR:.*]] = getelementptr inbounds <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>, <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>* %[[BLOCK]], i32 0, i32 4 |
| 104 | // CHECK: store %[[STRUCT_BLOCK_DESCRIPTOR]]* bitcast ({ i64, i64, i8*, i64 }* @[[BLOCK_DESCIPTOR_TMP_2]] to %[[STRUCT_BLOCK_DESCRIPTOR]]*), %[[STRUCT_BLOCK_DESCRIPTOR]]** %[[BLOCK_DESCRIPTOR]], align 8 |
| 105 | // CHECK: %[[BLOCK_CAPTURED:.*]] = getelementptr inbounds <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>, <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>* %[[BLOCK]], i32 0, i32 5 |
| 106 | // CHECK-NOARC: %[[V1:.*]] = load i8*, i8** %[[B_ADDR]], align 8 |
| 107 | // CHECK-NOARC: store i8* %[[V1]], i8** %[[BLOCK_CAPTURED]], align 8 |
| 108 | // CHECK-ARC: %[[V2:.*]] = load i8*, i8** %[[B_ADDR]], align 8 |
| 109 | // CHECK-ARC: %[[V3:.*]] = call i8* @llvm.objc.retain(i8* %[[V2]]) |
| 110 | // CHECK-ARC: store i8* %[[V3]], i8** %[[BLOCK_CAPTURED]], align 8 |
| 111 | // CHECK: call void @noescapeFunc0( |
| 112 | // CHECK-ARC: call void @llvm.objc.storeStrong(i8** %[[V0]], i8* null) |
| 113 | // CHECK-ARC: call void @llvm.objc.storeStrong(i8** %[[B_ADDR]], i8* null) |
| 114 | |
| 115 | // Non-escaping blocks don't need copy/dispose helper functions. |
| 116 | |
| 117 | // CHECK-NOT: define internal void @__copy_helper_block_ |
| 118 | // CHECK-NOT: define internal void @__destroy_helper_block_ |
| 119 | |
| 120 | void func(id); |
| 121 | |
| 122 | void test6(id a, id b) { |
| 123 | noescapeFunc0(a, ^{ func(b); }); |
| 124 | } |
| 125 | |
| 126 | // We don't need either the byref helper functions or the byref structs for |
| 127 | // __block variables that are not captured by escaping blocks. |
| 128 | |
| 129 | // CHECK: define void @test7( |
| 130 | // CHECK: alloca i8*, align 8 |
| 131 | // CHECK: %[[B0:.*]] = alloca i8*, align 8 |
| 132 | // CHECK: %[[BLOCK:.*]] = alloca <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8** }>, align 8 |
| 133 | // CHECK: %[[BLOCK_CAPTURED:.*]] = getelementptr inbounds <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8** }>, <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8** }>* %[[BLOCK]], i32 0, i32 5 |
| 134 | // CHECK: store i8** %[[B0]], i8*** %[[BLOCK_CAPTURED]], align 8 |
| 135 | |
| 136 | // CHECK-ARC-NOT: define internal void @__Block_byref_object_copy_ |
| 137 | // CHECK-ARC-NOT: define internal void @__Block_byref_object_dispose_ |
| 138 | |
| 139 | void test7() { |
| 140 | id a; |
| 141 | __block id b0; |
| 142 | noescapeFunc0(a, ^{ (void)b0; }); |
| 143 | } |
| 144 | |
| 145 | // __block variables captured by escaping blocks need byref helper functions. |
| 146 | |
| 147 | // CHECK: define void @test8( |
| 148 | // CHECK: %[[A:.*]] = alloca i8*, align 8 |
| 149 | // CHECK: %[[B0:.*]] = alloca %[[STRUCT_BLOCK_BYREF_B0]], align 8 |
| 150 | // CHECK: alloca <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>, align 8 |
| 151 | // CHECK: %[[BLOCK1:.*]] = alloca <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>, align 8 |
| 152 | // CHECK: %[[BLOCK_CAPTURED7:.*]] = getelementptr inbounds <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>, <{ i8*, i32, i32, i8*, %[[STRUCT_BLOCK_DESCRIPTOR]]*, i8* }>* %[[BLOCK1]], i32 0, i32 5 |
| 153 | // CHECK: %[[V3:.*]] = bitcast %[[STRUCT_BLOCK_BYREF_B0]]* %[[B0]] to i8* |
| 154 | // CHECK: store i8* %[[V3]], i8** %[[BLOCK_CAPTURED7]], align 8 |
| 155 | |
| 156 | // CHECK-ARC: define internal void @__Block_byref_object_copy_ |
| 157 | // CHECK-ARC: define internal void @__Block_byref_object_dispose_ |
| 158 | // CHECK: define linkonce_odr hidden void @__copy_helper_block_ |
| 159 | // CHECK: define linkonce_odr hidden void @__destroy_helper_block_ |
| 160 | |
| 161 | struct S0 { |
| 162 | id a, b; |
| 163 | }; |
| 164 | |
| 165 | void test8() { |
| 166 | id a; |
| 167 | __block struct S0 b0; |
| 168 | noescapeFunc0(a, ^{ (void)b0; }); |
| 169 | escapingFunc0(^{ (void)b0; }); |
| 170 | } |
| 171 | |