1// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fblocks -fobjc-arc -fobjc-runtime-has-weak -O2 -disable-llvm-passes -o - %s | FileCheck %s
2
3void test0(_Bool cond) {
4  id test0_helper(void) __attribute__((ns_returns_retained));
5
6  // CHECK-LABEL:      define void @test0(
7  // CHECK:      [[COND:%.*]] = alloca i8,
8  // CHECK-NEXT: [[X:%.*]] = alloca i8*,
9  // CHECK-NEXT: [[RELVAL:%.*]] = alloca i8*
10  // CHECK-NEXT: [[RELCOND:%.*]] = alloca i1
11  // CHECK-NEXT: zext
12  // CHECK-NEXT: store
13  // CHECK-NEXT: [[XPTR1:%.*]] = bitcast i8** [[X]] to i8*
14  // CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 8, i8* [[XPTR1]])
15  // CHECK-NEXT: [[T0:%.*]] = load i8, i8* [[COND]]
16  // CHECK-NEXT: [[T1:%.*]] = trunc i8 [[T0]] to i1
17  // CHECK-NEXT: store i1 false, i1* [[RELCOND]]
18  // CHECK-NEXT: br i1 [[T1]],
19  // CHECK:      br label
20  // CHECK:      [[CALL:%.*]] = call i8* @test0_helper()
21  // CHECK-NEXT: store i8* [[CALL]], i8** [[RELVAL]]
22  // CHECK-NEXT: store i1 true, i1* [[RELCOND]]
23  // CHECK-NEXT: br label
24  // CHECK:      [[T0:%.*]] = phi i8* [ null, {{%.*}} ], [ [[CALL]], {{%.*}} ]
25  // CHECK-NEXT: [[T1:%.*]] = call i8* @llvm.objc.retain(i8* [[T0]]) [[NUW:#[0-9]+]]
26  // CHECK-NEXT: store i8* [[T1]], i8** [[X]],
27  // CHECK-NEXT: [[REL:%.*]] = load i1, i1* [[RELCOND]]
28  // CHECK-NEXT: br i1 [[REL]],
29  // CHECK:      [[T0:%.*]] = load i8*, i8** [[RELVAL]]
30  // CHECK-NEXT: call void @llvm.objc.release(i8* [[T0]]) [[NUW]]
31  // CHECK-NEXT: br label
32  // CHECK:      [[T0:%.*]] = load i8*, i8** [[X]]
33  // CHECK-NEXT: call void @llvm.objc.release(i8* [[T0]]) [[NUW]]
34  // CHECK-NEXT: [[XPTR2:%.*]] = bitcast i8** [[X]] to i8*
35  // CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 8, i8* [[XPTR2]])
36  // CHECK-NEXT: ret void
37  id x = (cond ? 0 : test0_helper());
38}
39
40void test1(int cond) {
41  __strong id strong;
42  __weak id weak;
43  extern void test1_sink(id *);
44  test1_sink(cond ? &strong : 0);
45  test1_sink(cond ? &weak : 0);
46
47  // CHECK-LABEL:    define void @test1(
48  // CHECK:      [[COND:%.*]] = alloca i32
49  // CHECK-NEXT: [[STRONG:%.*]] = alloca i8*
50  // CHECK-NEXT: [[WEAK:%.*]] = alloca i8*
51  // CHECK-NEXT: [[TEMP1:%.*]] = alloca i8*
52  // CHECK-NEXT: [[TEMP2:%.*]] = alloca i8*
53  // CHECK-NEXT: [[CONDCLEANUPSAVE:%.*]] = alloca i8*
54  // CHECK-NEXT: [[CONDCLEANUP:%.*]] = alloca i1
55  // CHECK-NEXT: store i32
56  // CHECK-NEXT: [[STRONGPTR1:%.*]] = bitcast i8** [[STRONG]] to i8*
57  // CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 8, i8* [[STRONGPTR1]])
58  // CHECK-NEXT: store i8* null, i8** [[STRONG]]
59  // CHECK-NEXT: [[WEAKPTR1:%.*]] = bitcast i8** [[WEAK]] to i8*
60  // CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 8, i8* [[WEAKPTR1]])
61  // CHECK-NEXT: call i8* @llvm.objc.initWeak(i8** [[WEAK]], i8* null)
62
63  // CHECK-NEXT: [[T0:%.*]] = load i32, i32* [[COND]]
64  // CHECK-NEXT: [[T1:%.*]] = icmp ne i32 [[T0]], 0
65  // CHECK:      [[ARG:%.*]] = phi i8**
66  // CHECK-NEXT: [[T0:%.*]] = icmp eq i8** [[ARG]], null
67  // CHECK-NEXT: [[T1:%.*]] = select i1 [[T0]], i8** null, i8** [[TEMP1]]
68  // CHECK-NEXT: br i1 [[T0]],
69  // CHECK:      [[T0:%.*]] = load i8*, i8** [[ARG]]
70  // CHECK-NEXT: store i8* [[T0]], i8** [[TEMP1]]
71  // CHECK-NEXT: br label
72  // CHECK:      [[W:%.*]] = phi i8* [ [[T0]], {{%.*}} ], [ undef, {{%.*}} ]
73  // CHECK-NEXT: call void @test1_sink(i8** [[T1]])
74  // CHECK-NEXT: [[T0:%.*]] = icmp eq i8** [[ARG]], null
75  // CHECK-NEXT: br i1 [[T0]],
76  // CHECK:      [[T0:%.*]] = load i8*, i8** [[TEMP1]]
77  // CHECK-NEXT: [[T1:%.*]] = call i8* @llvm.objc.retain(i8* [[T0]])
78  // CHECK-NEXT: call void (...) @llvm.objc.clang.arc.use(i8* [[W]]) [[NUW]]
79  // CHECK-NEXT: [[T2:%.*]] = load i8*, i8** [[ARG]]
80  // CHECK-NEXT: store i8* [[T1]], i8** [[ARG]]
81  // CHECK-NEXT: call void @llvm.objc.release(i8* [[T2]])
82  // CHECK-NEXT: br label
83
84  // CHECK:      [[T0:%.*]] = load i32, i32* [[COND]]
85  // CHECK-NEXT: [[T1:%.*]] = icmp ne i32 [[T0]], 0
86  // CHECK:      [[ARG:%.*]] = phi i8**
87  // CHECK-NEXT: [[T0:%.*]] = icmp eq i8** [[ARG]], null
88  // CHECK-NEXT: [[T1:%.*]] = select i1 [[T0]], i8** null, i8** [[TEMP2]]
89  // CHECK-NEXT: store i1 false, i1* [[CONDCLEANUP]]
90  // CHECK-NEXT: br i1 [[T0]],
91  // CHECK:      [[T0:%.*]] = call i8* @llvm.objc.loadWeakRetained(i8** [[ARG]])
92  // CHECK-NEXT: store i8* [[T0]], i8** [[CONDCLEANUPSAVE]]
93  // CHECK-NEXT: store i1 true, i1* [[CONDCLEANUP]]
94  // CHECK-NEXT: store i8* [[T0]], i8** [[TEMP2]]
95  // CHECK-NEXT: br label
96  // CHECK:      call void @test1_sink(i8** [[T1]])
97  // CHECK-NEXT: [[T0:%.*]] = icmp eq i8** [[ARG]], null
98  // CHECK-NEXT: br i1 [[T0]],
99  // CHECK:      [[T0:%.*]] = load i8*, i8** [[TEMP2]]
100  // CHECK-NEXT: call i8* @llvm.objc.storeWeak(i8** [[ARG]], i8* [[T0]])
101  // CHECK-NEXT: br label
102
103  // CHECK:      call void @llvm.objc.destroyWeak(i8** [[WEAK]])
104  // CHECK:      [[WEAKPTR2:%.*]] = bitcast i8** [[WEAK]] to i8*
105  // CHECK:      call void @llvm.lifetime.end.p0i8(i64 8, i8* [[WEAKPTR2]])
106  // CHECK:      [[STRONGPTR2:%.*]] = bitcast i8** [[STRONG]] to i8*
107  // CHECK:      call void @llvm.lifetime.end.p0i8(i64 8, i8* [[STRONGPTR2]])
108  // CHECK:      ret void
109}
110
111// rdar://13113981
112// Test that, when emitting an expression at +1 that we can't peephole,
113// we emit the retain inside the full-expression.  If we ever peephole
114// +1s of conditional expressions (which we probably ought to), we'll
115// need to find another example of something we need to do this for.
116void test2(int cond) {
117  extern id test2_producer(void);
118  for (id obj in cond ? test2_producer() : (void*) 0) {
119  }
120
121  // CHECK-LABEL:    define void @test2(
122  // CHECK:      [[COND:%.*]] = alloca i32,
123  // CHECK:      alloca i8*
124  // CHECK:      [[CLEANUP_SAVE:%.*]] = alloca i8*
125  // CHECK:      [[RUN_CLEANUP:%.*]] = alloca i1
126  //   Evaluate condition; cleanup disabled by default.
127  // CHECK:      [[T0:%.*]] = load i32, i32* [[COND]],
128  // CHECK-NEXT: icmp ne i32 [[T0]], 0
129  // CHECK-NEXT: store i1 false, i1* [[RUN_CLEANUP]]
130  // CHECK-NEXT: br i1
131  //   Within true branch, cleanup enabled.
132  // CHECK:      [[T0:%.*]] = call i8* @test2_producer()
133  // CHECK-NEXT: [[T1:%.*]] = notail call i8* @llvm.objc.retainAutoreleasedReturnValue(i8* [[T0]])
134  // CHECK-NEXT: store i8* [[T1]], i8** [[CLEANUP_SAVE]]
135  // CHECK-NEXT: store i1 true, i1* [[RUN_CLEANUP]]
136  // CHECK-NEXT: br label
137  //   Join point for conditional operator; retain immediately.
138  // CHECK:      [[T0:%.*]] = phi i8* [ [[T1]], {{%.*}} ], [ null, {{%.*}} ]
139  // CHECK-NEXT: [[RESULT:%.*]] = call i8* @llvm.objc.retain(i8* [[T0]])
140  //   Leaving full-expression; run conditional cleanup.
141  // CHECK-NEXT: [[T0:%.*]] = load i1, i1* [[RUN_CLEANUP]]
142  // CHECK-NEXT: br i1 [[T0]]
143  // CHECK:      [[T0:%.*]] = load i8*, i8** [[CLEANUP_SAVE]]
144  // CHECK-NEXT: call void @llvm.objc.release(i8* [[T0]])
145  // CHECK-NEXT: br label
146  //   And way down at the end of the loop:
147  // CHECK:      call void @llvm.objc.release(i8* [[RESULT]])
148}
149
150// CHECK: attributes [[NUW]] = { nounwind }
151