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
4 typedef void (^BlockTy)(void);
9 } __attribute__((transparent_union));
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);
17 // Block descriptors of non-escaping blocks don't need pointers to copy/dispose
20 // CHECK: %[[STRUCT_BLOCK_DESCRIPTOR:.*]] = type { i64, i64 }
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.
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
30 // CHECK-LABEL: define void @test0(
31 // CHECK: call void @noescapeFunc0({{.*}}, {{.*}} nocapture {{.*}})
32 // CHECK: declare void @noescapeFunc0(i8*, {{.*}} nocapture)
33 void test0(BlockTy b) {
37 // CHECK-LABEL: define void @test1(
38 // CHECK: call void @noescapeFunc1({{.*}} nocapture {{.*}})
39 // CHECK: declare void @noescapeFunc1({{.*}} nocapture)
44 // CHECK-LABEL: define void @test2(
45 // CHECK: call void @noescapeFunc2({{.*}} nocapture {{.*}})
46 // CHECK: declare void @noescapeFunc2({{.*}} nocapture)
51 // CHECK-LABEL: define void @test3(
52 // CHECK: call void @noescapeFunc3({{.*}} nocapture {{.*}})
53 // CHECK: declare void @noescapeFunc3({{.*}} nocapture)
54 void test3(union U u) {
58 // CHECK: define internal void @"\01-[C0 m0:]"({{.*}}, {{.*}}, {{.*}} nocapture {{.*}})
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 {{.*}})
64 -(void) m0:(int*)__attribute__((noescape)) p0;
68 -(void) m0:(int*)__attribute__((noescape)) p0 {
72 void test4(C0 *c0, int *p) {
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 {{.*}})
81 typedef void (^BlockTy2)(__attribute__((noescape)) int *);
83 void test5(BlockTy2 b, int *p) {
84 ^(int *__attribute__((noescape)) p0){}(p);
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'.
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)
115 // Non-escaping blocks don't need copy/dispose helper functions.
117 // CHECK-NOT: define internal void @__copy_helper_block_
118 // CHECK-NOT: define internal void @__destroy_helper_block_
122 void test6(id a, id b) {
123 noescapeFunc0(a, ^{ func(b); });
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.
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
136 // CHECK-ARC-NOT: define internal void @__Block_byref_object_copy_
137 // CHECK-ARC-NOT: define internal void @__Block_byref_object_dispose_
142 noescapeFunc0(a, ^{ (void)b0; });
145 // __block variables captured by escaping blocks need byref helper functions.
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
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_
167 __block struct S0 b0;
168 noescapeFunc0(a, ^{ (void)b0; });
169 escapingFunc0(^{ (void)b0; });