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$_2clEvE1x" = internal global i32 42 |
9 | |
10 | namespace pr6769 { |
11 | struct X { |
12 | static void f(); |
13 | }; |
14 | |
15 | void X::f() { |
16 | static int *i; |
17 | { |
18 | struct Y { |
19 | static void g() { |
20 | i = new int(); |
21 | *i = 100; |
22 | (*i) = (*i) +1; |
23 | } |
24 | }; |
25 | (void)Y::g(); |
26 | } |
27 | (void)i; |
28 | } |
29 | } |
30 | |
31 | namespace pr7101 { |
32 | void foo() { |
33 | static int n = 0; |
34 | struct Helper { |
35 | static void Execute() { |
36 | n++; |
37 | } |
38 | }; |
39 | Helper::Execute(); |
40 | } |
41 | } |
42 | |
43 | // These tests all break the assumption that the static var decl has to be |
44 | // emitted before use of the var decl. This happens because we defer emission |
45 | // of variables with internal linkage and no initialization side effects, such |
46 | // as 'x'. Then we hit operator()() in 'f', and emit the callee before we emit |
47 | // the arguments, so we emit the innermost function first. |
48 | |
49 | namespace pr18020_lambda { |
50 | // Referring to l1 before emitting it used to crash. |
51 | auto x = []() { |
52 | static int l1 = 0; |
53 | return [] { return l1; }; |
54 | }; |
55 | int f() { return x()(); } |
56 | } |
57 | |
58 | // CHECK-LABEL: define internal i32 @"_ZZNK14pr18020_lambda3$_0clEvENKUlvE_clEv" |
59 | // CHECK: load i32, i32* @"_ZZNK14pr18020_lambda3$_0clEvE2l1" |
60 | |
61 | namespace pr18020_constexpr { |
62 | // Taking the address of l1 in a constant expression used to crash. |
63 | auto x = []() { |
64 | static int l1 = 0; |
65 | return [] { |
66 | static int *l2 = &l1; |
67 | return *l2; |
68 | }; |
69 | }; |
70 | int f() { return x()(); } |
71 | } |
72 | |
73 | // CHECK-LABEL: define internal i32 @"_ZZNK17pr18020_constexpr3$_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. |
78 | struct pr18020_class { |
79 | auto operator()() { |
80 | static int l1 = 0; |
81 | struct U { |
82 | int operator()() { return l1; } |
83 | }; |
84 | return U(); |
85 | } |
86 | }; |
87 | static pr18020_class x; |
88 | int 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. |
96 | static auto deduced_return() { |
97 | static int n = 42; |
98 | struct S { int *operator()() { return &n; } }; |
99 | return S(); |
100 | } |
101 | extern "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 | |
113 | static 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 | } |
121 | extern "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 | |
133 | inline 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(); |
139 | label: |
140 | __builtin_abort(); |
141 | } |
142 | void *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 | |
148 | auto global_lambda = []() { |
149 | static int x = 42; |
150 | struct S { static int *get() { return &x; } }; |
151 | return S(); |
152 | }; |
153 | extern "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 | |