1// RUN: %clang_cc1 -triple x86_64-linux -fblocks -emit-llvm -o - %s -std=c++1y | FileCheck %s
2
3// CHECK: @"_ZZZNK17pr18020_constexpr3$_1clEvENKUlvE_clEvE2l2" =
4// CHECK: internal global i32* @"_ZZNK17pr18020_constexpr3$_1clEvE2l1"
5// CHECK: @_ZZL14deduced_returnvE1n = internal global i32 42
6// CHECK: @_ZZZL20block_deduced_returnvEUb_E1n = internal global i32 42
7// CHECK: @_ZZ18static_local_labelPvE1q = linkonce_odr global i8* blockaddress(@_Z18static_local_labelPv, %{{.*}})
8// CHECK: @"_ZZNK3$_2clEvE1x" = internal global i32 42
9
10namespace pr6769 {
11struct X {
12  static void f();
13};
14
15void X::f() {
16  static int *i;
17  {
18    struct Y {
19      static void g() {
20        i = new int();
21	*i = 100;
22	(*i) = (*i) +1;
23      }
24    };
25    (void)Y::g();
26  }
27  (void)i;
28}
29}
30
31namespace pr7101 {
32void foo() {
33    static int n = 0;
34    struct Helper {
35        static void Execute() {
36            n++;
37        }
38    };
39    Helper::Execute();
40}
41}
42
43// These tests all break the assumption that the static var decl has to be
44// emitted before use of the var decl.  This happens because we defer emission
45// of variables with internal linkage and no initialization side effects, such
46// as 'x'.  Then we hit operator()() in 'f', and emit the callee before we emit
47// the arguments, so we emit the innermost function first.
48
49namespace pr18020_lambda {
50// Referring to l1 before emitting it used to crash.
51auto x = []() {
52  static int l1 = 0;
53  return [] { return l1; };
54};
55int f() { return x()(); }
56}
57
58// CHECK-LABEL: define internal i32 @"_ZZNK14pr18020_lambda3$_0clEvENKUlvE_clEv"
59// CHECK: load i32, i32* @"_ZZNK14pr18020_lambda3$_0clEvE2l1"
60
61namespace pr18020_constexpr {
62// Taking the address of l1 in a constant expression used to crash.
63auto x = []() {
64  static int l1 = 0;
65  return [] {
66    static int *l2 = &l1;
67    return *l2;
68  };
69};
70int f() { return x()(); }
71}
72
73// CHECK-LABEL: define internal i32 @"_ZZNK17pr18020_constexpr3$_1clEvENKUlvE_clEv"
74// CHECK: load i32*, i32** @"_ZZZNK17pr18020_constexpr3$_1clEvENKUlvE_clEvE2l2"
75
76// Lambda-less reduction that references l1 before emitting it.  This didn't
77// crash if you put it in a namespace.
78struct pr18020_class {
79  auto operator()() {
80    static int l1 = 0;
81    struct U {
82      int operator()() { return l1; }
83    };
84    return U();
85  }
86};
87static pr18020_class x;
88int pr18020_f() { return x()(); }
89
90// CHECK-LABEL: define linkonce_odr i32 @_ZZN13pr18020_classclEvEN1UclEv
91// CHECK: load i32, i32* @_ZZN13pr18020_classclEvE2l1
92
93// In this test case, the function containing the static local will not be
94// emitted because it is unneeded. However, the operator call of the inner class
95// is called, and the static local is referenced and must be emitted.
96static auto deduced_return() {
97  static int n = 42;
98  struct S { int *operator()() { return &n; } };
99  return S();
100}
101extern "C" int call_deduced_return_operator() {
102  return *decltype(deduced_return())()();
103}
104
105// CHECK-LABEL: define i32 @call_deduced_return_operator()
106// CHECK: call i32* @_ZZL14deduced_returnvEN1SclEv(
107// CHECK: load i32, i32* %
108// CHECK: ret i32 %
109
110// CHECK-LABEL: define internal i32* @_ZZL14deduced_returnvEN1SclEv(%struct.S* %this)
111// CHECK: ret i32* @_ZZL14deduced_returnvE1n
112
113static auto block_deduced_return() {
114  auto (^b)() = ^() {
115    static int n = 42;
116    struct S { int *operator()() { return &n; } };
117    return S();
118  };
119  return b();
120}
121extern "C" int call_block_deduced_return() {
122  return *decltype(block_deduced_return())()();
123}
124
125// CHECK-LABEL: define i32 @call_block_deduced_return()
126// CHECK: call i32* @_ZZZL20block_deduced_returnvEUb_EN1SclEv(
127// CHECK: load i32, i32* %
128// CHECK: ret i32 %
129
130// CHECK-LABEL: define internal i32* @_ZZZL20block_deduced_returnvEUb_EN1SclEv(%struct.S.6* %this) #0 align 2 {
131// CHECK: ret i32* @_ZZZL20block_deduced_returnvEUb_E1n
132
133inline auto static_local_label(void *p) {
134  if (p)
135    goto *p;
136  static void *q = &&label;
137  struct S { static void *get() { return q; } };
138  return S();
139label:
140  __builtin_abort();
141}
142void *global_label = decltype(static_local_label(0))::get();
143
144// CHECK-LABEL: define linkonce_odr i8* @_ZZ18static_local_labelPvEN1S3getEv()
145// CHECK: %[[lbl:[^ ]*]] = load i8*, i8** @_ZZ18static_local_labelPvE1q
146// CHECK: ret i8* %[[lbl]]
147
148auto global_lambda = []() {
149  static int x = 42;
150  struct S { static int *get() { return &x; } };
151  return S();
152};
153extern "C" int use_global_lambda() {
154  return *decltype(global_lambda())::get();
155}
156// CHECK-LABEL: define i32 @use_global_lambda()
157// CHECK: call i32* @"_ZZNK3$_2clEvEN1S3getEv"()
158
159// CHECK-LABEL: define internal i32* @"_ZZNK3$_2clEvEN1S3getEv"()
160// CHECK: ret i32* @"_ZZNK3$_2clEvE1x"
161