| 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 | |