clang/test/CodeGenObjC/mrc-weak.m

   1 // RUN: %clang_cc1 -no-opaque-pointers -triple x86_64-apple-darwin10 -fobjc-runtime=macosx-10.10 -emit-llvm -fblocks -fobjc-weak -o - %s | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-MODERN
   2 // RUN: %clang_cc1 -no-opaque-pointers -triple i386-apple-darwin10 -fobjc-runtime=macosx-fragile-10.10 -emit-llvm -fblocks -fobjc-weak -o - %s | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-FRAGILE
   3
   4 @interface Object
   5 - (instancetype) retain;
   6 - (void) run;
   7 @end
   8
   9 // The ivars in HighlyAlignedSubclass should be placed in the tail-padding
  10 // of the superclass.  Ensure that they're still covered by layouts.
  11 @interface HighlyAligned : Object {
  12   __attribute__((aligned(32))) void *array[2];
  13 }
  14 @end
  15 // CHECK-MODERN: @"OBJC_IVAR_$_HighlyAlignedSubclass.ivar2" ={{.*}} global i64 24,
  16 // CHECK-MODERN: @"OBJC_IVAR_$_HighlyAlignedSubclass.ivar" ={{.*}} global i64 16,
  17 // CHECK-MODERN: @OBJC_CLASS_NAME_{{.*}} = {{.*}} c"\02\00"
  18 // CHECK-MODERN: @"_OBJC_CLASS_RO_$_HighlyAlignedSubclass" = {{.*}} {
  19 // CHECK-FRAGILE: @OBJC_INSTANCE_VARIABLES_HighlyAlignedSubclass = {{.*}}, i32 8 }, {{.*}}, i32 12 }]
  20 // CHECK-FRAGILE: @OBJC_CLASS_NAME_{{.*}} = {{.*}} c"\02\00"
  21 // CHECK-FRAGILE: @OBJC_CLASS_HighlyAlignedSubclass
  22 @interface HighlyAlignedSubclass : HighlyAligned {
  23   __weak id ivar;
  24   __weak id ivar2;
  25 }
  26 @end
  27 @implementation HighlyAlignedSubclass @end
  28
  29 // CHECK-MODERN: @OBJC_CLASS_NAME_{{.*}} = {{.*}} c"\01\00"
  30 // CHECK-MODERN: @"_OBJC_CLASS_RO_$_Foo" = {{.*}} { i32 772
  31 //   772 == 0x304
  32 //            ^ HasMRCWeakIvars
  33 //            ^ HasCXXDestructorOnly
  34 //              ^ HasCXXStructors
  35
  36 // CHECK-FRAGILE: @OBJC_CLASS_NAME_{{.*}} = {{.*}} c"\01\00"
  37 // CHECK-FRAGILE: @OBJC_CLASS_Foo = {{.*}} i32 134225921,
  38 //   134225921 == 0x08002001
  39 //                   ^ HasMRCWeakIvars
  40 //                      ^ HasCXXStructors
  41 //                         ^ Factory
  42 @interface Foo : Object {
  43   __weak id ivar;
  44 }
  45 @end
  46
  47 @implementation Foo
  48 // CHECK-LABEL: define internal void @"\01-[Foo .cxx_destruct]"
  49 // CHECK: call void @llvm.objc.destroyWeak
  50 @end
  51
  52
  53 void test1(__weak id x) {}
  54 // CHECK-LABEL: define{{.*}} void @test1
  55 // CHECK:      [[X:%.*]] = alloca i8*,
  56 // CHECK-NEXT: @llvm.objc.initWeak
  57 // CHECK-NEXT: @llvm.objc.destroyWeak
  58 // CHECK-NEXT: ret void
  59
  60 void test2(id y) {
  61   __weak id z = y;
  62 }
  63 // CHECK-LABEL: define{{.*}} void @test2
  64 // CHECK:      [[Y:%.*]] = alloca i8*,
  65 // CHECK-NEXT: [[Z:%.*]] = alloca i8*,
  66 // CHECK-NEXT: store
  67 // CHECK-NEXT: [[T0:%.*]] = load i8*, i8** [[Y]]
  68 // CHECK-NEXT: call i8* @llvm.objc.initWeak(i8** [[Z]], i8* [[T0]])
  69 // CHECK-NEXT: call void @llvm.objc.destroyWeak(i8** [[Z]])
  70 // CHECK-NEXT: ret void
  71
  72 void test3(id y) {
  73   __weak id z;
  74   z = y;
  75 }
  76 // CHECK-LABEL: define{{.*}} void @test3
  77 // CHECK:      [[Y:%.*]] = alloca i8*,
  78 // CHECK-NEXT: [[Z:%.*]] = alloca i8*,
  79 // CHECK-NEXT: store
  80 // CHECK-NEXT: store i8* null, i8** [[Z]]
  81 // CHECK-NEXT: [[T0:%.*]] = load i8*, i8** [[Y]]
  82 // CHECK-NEXT: call i8* @llvm.objc.storeWeak(i8** [[Z]], i8* [[T0]])
  83 // CHECK-NEXT: call void @llvm.objc.destroyWeak(i8** [[Z]])
  84 // CHECK-NEXT: ret void
  85
  86 void test4(__weak id *p) {
  87   id y = *p;
  88 }
  89 // CHECK-LABEL: define{{.*}} void @test4
  90 // CHECK:      [[P:%.*]] = alloca i8**,
  91 // CHECK-NEXT: [[Y:%.*]] = alloca i8*,
  92 // CHECK-NEXT: store
  93 // CHECK-NEXT: [[T0:%.*]] = load i8**, i8*** [[P]]
  94 // CHECK-NEXT: [[T1:%.*]] = call i8* @llvm.objc.loadWeak(i8** [[T0]])
  95 // CHECK-NEXT: store i8* [[T1]], i8** [[Y]]
  96 // CHECK-NEXT: ret void
  97
  98 void test5(__weak id *p) {
  99   id y = [*p retain];
 100 }
 101 // CHECK-LABEL: define{{.*}} void @test5
 102 // CHECK:      [[P:%.*]] = alloca i8**,
 103 // CHECK-NEXT: [[Y:%.*]] = alloca i8*,
 104 // CHECK-NEXT: store
 105 // CHECK-NEXT: [[T0:%.*]] = load i8**, i8*** [[P]]
 106 // CHECK-NEXT: [[T1:%.*]] = call i8* @llvm.objc.loadWeakRetained(i8** [[T0]])
 107 // CHECK-NEXT: store i8* [[T1]], i8** [[Y]]
 108 // CHECK-NEXT: ret void
 109
 110 void test6(__weak Foo **p) {
 111   Foo *y = [*p retain];
 112 }
 113 // CHECK-LABEL: define{{.*}} void @test6
 114 // CHECK:      [[P:%.*]] = alloca [[FOO:%.*]]**,
 115 // CHECK-NEXT: [[Y:%.*]] = alloca [[FOO]]*,
 116 // CHECK-NEXT: store
 117 // CHECK-NEXT: [[T0:%.*]] = load [[FOO]]**, [[FOO]]*** [[P]]
 118 // CHECK-NEXT: [[T1:%.*]] = bitcast [[FOO]]** [[T0]] to i8**
 119 // CHECK-NEXT: [[T2:%.*]] = call i8* @llvm.objc.loadWeakRetained(i8** [[T1]])
 120 // CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to [[FOO]]*
 121 // CHECK-NEXT: store [[FOO]]* [[T3]], [[FOO]]** [[Y]]
 122 // CHECK-NEXT: ret void
 123
 124 extern id get_object(void);
 125 extern void use_block(void (^)(void));
 126
 127 void test7(void) {
 128   __weak Foo *p = get_object();
 129   use_block(^{ [p run ]; });
 130 }
 131 // CHECK-LABEL: define{{.*}} void @test7
 132 // CHECK:       [[P:%.*]] = alloca [[FOO]]*,
 133 // CHECK:       [[T0:%.*]] = call i8* @get_object()
 134 // CHECK-NEXT:  [[T1:%.*]] = bitcast i8* [[T0]] to [[FOO]]*
 135 // CHECK-NEXT:  [[T2:%.*]] = bitcast [[FOO]]** [[P]] to i8**
 136 // CHECK-NEXT:  [[T3:%.*]] = bitcast [[FOO]]* [[T1]] to i8*
 137 // CHECK-NEXT:  call i8* @llvm.objc.initWeak(i8** [[T2]], i8* [[T3]])
 138 // CHECK:       call void @llvm.objc.copyWeak
 139 // CHECK:       call void @use_block
 140 // CHECK:       call void @llvm.objc.destroyWeak
 141
 142 // CHECK-LABEL: define linkonce_odr hidden void @__copy_helper_block
 143 // CHECK:       @llvm.objc.copyWeak
 144
 145 // CHECK-LABEL: define linkonce_odr hidden void @__destroy_helper_block
 146 // CHECK:       @llvm.objc.destroyWeak
 147
 148 void test8(void) {
 149   __block __weak Foo *p = get_object();
 150   use_block(^{ [p run ]; });
 151 }
 152 // CHECK-LABEL: define{{.*}} void @test8
 153 // CHECK:       call i8* @llvm.objc.initWeak
 154 // CHECK-NOT:   call void @llvm.objc.copyWeak
 155 // CHECK:       call void @use_block
 156 // CHECK:       call void @llvm.objc.destroyWeak
 157
 158 // CHECK-LABEL: define internal void @__Block_byref_object_copy
 159 // CHECK:       call void @llvm.objc.moveWeak
 160
 161 // CHECK-LABEL: define internal void @__Block_byref_object_dispose
 162 // CHECK:       call void @llvm.objc.destroyWeak
 163
 164 // CHECK-LABEL: define{{.*}} void @test9_baseline()
 165 // CHECK:       define linkonce_odr hidden void @__copy_helper
 166 // CHECK:       define linkonce_odr hidden void @__destroy_helper
 167 void test9_baseline(void) {
 168   Foo *p = get_object();
 169   use_block(^{ [p run]; });
 170 }
 171
 172 // CHECK-LABEL: define{{.*}} void @test9()
 173 // CHECK-NOT:   define linkonce_odr hidden void @__copy_helper
 174 // CHECK-NOT:   define linkonce_odr hidden void @__destroy_helper
 175 // CHECK:       define{{.*}} void @test9_fin()
 176 void test9(void) {
 177   __unsafe_unretained Foo *p = get_object();
 178   use_block(^{ [p run]; });
 179 }
 180 void test9_fin(void) {}
 181
 182 // CHECK-LABEL: define{{.*}} void @test10()
 183 // CHECK-NOT:   define linkonce_odr hidden void @__copy_helper
 184 // CHECK-NOT:   define linkonce_odr hidden void @__destroy_helper
 185 // CHECK:       define{{.*}} void @test10_fin()
 186 void test10(void) {
 187   typedef __unsafe_unretained Foo *UnsafeFooPtr;
 188   UnsafeFooPtr p = get_object();
 189   use_block(^{ [p run]; });
 190 }
 191 void test10_fin(void) {}