1// RUN: %clang_cc1 -triple i386-apple-darwin10 -emit-llvm -fblocks -fobjc-arc -fobjc-exceptions -fobjc-runtime=macosx-fragile-10.10 -o - %s | FileCheck %s
2// RUN: %clang_cc1 -triple i386-apple-darwin10 -emit-llvm -fblocks -fobjc-arc -fobjc-exceptions -fobjc-runtime=macosx-fragile-10.10 -o - %s | FileCheck %s -check-prefix=GLOBALS
3
4@class Opaque;
5
6@interface Root {
7  Class isa;
8}
9@end
10
11@interface A : Root {
12  Opaque *strong;
13  __weak Opaque *weak;
14}
15@end
16
17// GLOBALS-LABEL @OBJC_METACLASS_A
18//  Strong layout: scan the first word.
19// GLOBALS: @OBJC_CLASS_NAME_{{.*}} = private unnamed_addr constant [2 x i8] c"\01\00"
20//  Weak layout: skip the first word, scan the second word.
21// GLOBALS: @OBJC_CLASS_NAME_{{.*}} = private unnamed_addr constant [2 x i8] c"\11\00"
22
23//  0x04002001
24//     ^ is compiled by ARC (controls interpretation of layouts)
25//        ^ has C++ structors (no distinction for zero-initializable)
26//           ^ factory (always set on non-metaclasses)
27// GLOBALS: @OBJC_CLASS_A = private global {{.*}} i32 67117057
28
29@implementation A
30// CHECK-LABEL: define internal void @"\01-[A testStrong]"
31// CHECK:      [[SELFVAR:%.*]] = alloca [[A:%.*]]*, align 4
32- (void) testStrong {
33// CHECK:      [[X:%.*]] = alloca [[OPAQUE:%.*]]*, align 4
34// CHECK:      [[SELF:%.*]] = load [[A]]*, [[A]]** [[SELFVAR]]
35// CHECK-NEXT: [[T0:%.*]] = bitcast [[A]]* [[SELF]] to i8*
36// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds i8, i8* [[T0]], i32 4
37// CHECK-NEXT: [[IVAR:%.*]] = bitcast i8* [[T1]] to [[OPAQUE]]**
38// CHECK-NEXT: [[T0:%.*]] = load [[OPAQUE]]*, [[OPAQUE]]** [[IVAR]]
39// CHECK-NEXT: [[T1:%.*]] = bitcast [[OPAQUE]]* [[T0]] to i8*
40// CHECK-NEXT: [[T2:%.*]] = call i8* @llvm.objc.retain(i8* [[T1]])
41// CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to [[OPAQUE]]*
42// CHECK-NEXT: store [[OPAQUE]]* [[T3]], [[OPAQUE]]** [[X]]
43  Opaque *x = strong;
44// CHECK-NEXT: [[VALUE:%.*]] = load [[OPAQUE]]*, [[OPAQUE]]** [[X]]
45// CHECK-NEXT: [[SELF:%.*]] = load [[A]]*, [[A]]** [[SELFVAR]]
46// CHECK-NEXT: [[T0:%.*]] = bitcast [[A]]* [[SELF]] to i8*
47// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds i8, i8* [[T0]], i32 4
48// CHECK-NEXT: [[IVAR:%.*]] = bitcast i8* [[T1]] to [[OPAQUE]]**
49// CHECK-NEXT: [[T0:%.*]] = bitcast [[OPAQUE]]** [[IVAR]] to i8**
50// CHECK-NEXT: [[T1:%.*]] = bitcast [[OPAQUE]]* [[VALUE]] to i8*
51// CHECK-NEXT: call void @llvm.objc.storeStrong(i8** [[T0]], i8* [[T1]])
52  strong = x;
53// CHECK-NEXT: [[T0:%.*]] = bitcast [[OPAQUE]]** [[X]] to i8**
54// CHECK-NEXT: call void @llvm.objc.storeStrong(i8** [[T0]], i8* null)
55// CHECK-NEXT: ret void
56}
57
58// CHECK-LABEL: define internal void @"\01-[A testWeak]"
59// CHECK:      [[SELFVAR:%.*]] = alloca [[A]]*, align 4
60- (void) testWeak {
61// CHECK:      [[X:%.*]] = alloca [[OPAQUE]]*, align 4
62// CHECK:      [[SELF:%.*]] = load [[A]]*, [[A]]** [[SELFVAR]]
63// CHECK-NEXT: [[T0:%.*]] = bitcast [[A]]* [[SELF]] to i8*
64// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds i8, i8* [[T0]], i32 8
65// CHECK-NEXT: [[IVAR:%.*]] = bitcast i8* [[T1]] to [[OPAQUE]]**
66// CHECK-NEXT: [[T0:%.*]] = bitcast [[OPAQUE]]** [[IVAR]] to i8**
67// CHECK-NEXT: [[T1:%.*]] = call i8* @llvm.objc.loadWeakRetained(i8** [[T0]])
68// CHECK-NEXT: [[T2:%.*]] = bitcast i8* [[T1]] to [[OPAQUE]]*
69// CHECK-NEXT: store [[OPAQUE]]* [[T2]], [[OPAQUE]]** [[X]]
70  Opaque *x = weak;
71// CHECK-NEXT: [[VALUE:%.*]] = load [[OPAQUE]]*, [[OPAQUE]]** [[X]]
72// CHECK-NEXT: [[SELF:%.*]] = load [[A]]*, [[A]]** [[SELFVAR]]
73// CHECK-NEXT: [[T0:%.*]] = bitcast [[A]]* [[SELF]] to i8*
74// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds i8, i8* [[T0]], i32 8
75// CHECK-NEXT: [[IVAR:%.*]] = bitcast i8* [[T1]] to [[OPAQUE]]**
76// CHECK-NEXT: [[T0:%.*]] = bitcast [[OPAQUE]]** [[IVAR]] to i8**
77// CHECK-NEXT: [[T1:%.*]] = bitcast [[OPAQUE]]* [[VALUE]] to i8*
78// CHECK-NEXT: call i8* @llvm.objc.storeWeak(i8** [[T0]], i8* [[T1]])
79  weak = x;
80// CHECK-NEXT: [[T0:%.*]] = bitcast [[OPAQUE]]** [[X]] to i8**
81// CHECK-NEXT: call void @llvm.objc.storeStrong(i8** [[T0]], i8* null)
82// CHECK-NEXT: ret void
83}
84
85// CHECK-LABEL: define internal void @"\01-[A .cxx_destruct]"
86// CHECK:      [[SELFVAR:%.*]] = alloca [[A]]*, align 4
87// CHECK:      [[SELF:%.*]] = load [[A]]*, [[A]]** [[SELFVAR]]
88// CHECK-NEXT: [[T0:%.*]] = bitcast [[A]]* [[SELF]] to i8*
89// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds i8, i8* [[T0]], i32 8
90// CHECK-NEXT: [[IVAR:%.*]] = bitcast i8* [[T1]] to [[OPAQUE]]**
91// CHECK-NEXT: [[T0:%.*]] = bitcast [[OPAQUE]]** [[IVAR]] to i8**
92// CHECK-NEXT: call void @llvm.objc.destroyWeak(i8** [[T0]])
93// CHECK-NEXT: [[T0:%.*]] = bitcast [[A]]* [[SELF]] to i8*
94// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds i8, i8* [[T0]], i32 4
95// CHECK-NEXT: [[IVAR:%.*]] = bitcast i8* [[T1]] to [[OPAQUE]]**
96// CHECK-NEXT: [[T0:%.*]] = bitcast [[OPAQUE]]** [[IVAR]] to i8**
97// CHECK-NEXT: call void @llvm.objc.storeStrong(i8** [[T0]], i8* null)
98// CHECK-NEXT: ret void
99@end
100
101// Test case for corner case of ivar layout.
102@interface B : A {
103  char _b_flag;
104}
105@end
106
107@interface C : B {
108  char _c_flag;
109  __unsafe_unretained id c_unsafe[5];
110  id c_strong[4];
111  __weak id c_weak[3];
112  id c_strong2[7];
113}
114@end
115@implementation C @end
116
117//  Note that these layouts implicitly start at the end of the previous
118//  class rounded up to pointer alignment.
119// GLOBALS-LABEL: @OBJC_METACLASS_C
120//  Strong layout: skip five, scan four, skip three, scan seven
121//    'T' == 0x54, '7' == 0x37
122// GLOBALS: @OBJC_CLASS_NAME_{{.*}} = private unnamed_addr constant [3 x i8] c"T7\00"
123//  Weak layout: skip nine, scan three
124// GLOBALS: @OBJC_CLASS_NAME_{{.*}} = private unnamed_addr constant [2 x i8] c"\93\00"
125
126extern void useBlock(void (^block)(void));
127
128//  256 == 0x100 == starts with 1 strong
129// GLOBALS: @"__block_descriptor{{.*}} = linkonce_odr hidden {{.*}}, i32 256 }
130void testBlockLayoutStrong(id x) {
131  useBlock(^{ (void) x; });
132}
133
134//  1   == 0x001 == starts with 1 weak
135// GLOBALS: @"__block_descriptor{{.*}} = linkonce_odr hidden {{.*}}, i32 1 }
136void testBlockLayoutWeak(__weak id x) {
137  useBlock(^{ (void) x; });
138}
139
140// CHECK-LABEL: define void @testCatch()
141// CHECK: [[X:%.*]] = alloca [[A:%.*]]*, align 4
142// CHECK: [[Y:%.*]] = alloca i8*, align 4
143// CHECK: call void @objc_exception_try_enter
144// CHECK: br i1
145// CHECK: call void @checkpoint(i32 0)
146// CHECK: call void @objc_exception_try_exit
147// CHECK: br label
148// CHECK: call void @checkpoint(i32 3)
149// CHECK: [[EXN:%.*]] = call i8* @objc_exception_extract
150// CHECK: call i32 @objc_exception_match(
151// CHECK: br i1
152// CHECK: [[T0:%.*]] = bitcast i8* [[EXN]] to [[A]]*
153// CHECK: [[T1:%.*]] = bitcast [[A]]* [[T0]] to i8*
154// CHECK: [[T2:%.*]] = call i8* @llvm.objc.retain(i8* [[T1]])
155// CHECK: [[T3:%.*]] = bitcast i8* [[T2]] to [[A]]*
156// CHECK: store [[A]]* [[T3]], [[A]]** [[X]]
157// CHECK: call void @checkpoint(i32 1)
158// CHECK: [[T0:%.*]] = bitcast [[A]]** [[X]] to i8**
159// CHECK: call void @llvm.objc.storeStrong(i8** [[T0]], i8* null)
160// CHECK: br label
161// CHECK: [[T0:%.*]] = call i8* @llvm.objc.retain(i8* [[EXN]])
162// CHECK: store i8* [[T0]], i8** [[Y]]
163// CHECK: call void @checkpoint(i32 2)
164// CHECK: call void @llvm.objc.storeStrong(i8** [[Y]], i8* null)
165extern void checkpoint(int n);
166void testCatch() {
167  @try {
168    checkpoint(0);
169  } @catch (A *x) {
170    checkpoint(1);
171  } @catch (id y) {
172    checkpoint(2);
173  }
174  checkpoint(3);
175}
176