1 // RUN: %clang_cc1 -triple=x86_64-apple-darwin10 -emit-llvm -fexceptions %s -o - |FileCheck %s 2 // RUN: %clang_cc1 -triple=x86_64-apple-darwin10 -emit-llvm %s -o - |FileCheck -check-prefix CHECK-NOEXC %s 3 4 struct A { 5 A(); 6 ~A(); 7 }; 8 9 struct B { B(); ~B(); }; 10 11 struct C { void *field; }; 12 13 struct D { ~D(); }; 14 15 // CHECK: @__dso_handle = external global i8 16 // CHECK: @c = global %struct.C zeroinitializer, align 8 17 18 // It's okay if we ever implement the IR-generation optimization to remove this. 19 // CHECK: @_ZN5test3L3varE = internal constant i8* getelementptr inbounds ([7 x i8]* 20 21 // PR6205: The casts should not require global initializers 22 // CHECK: @_ZN6PR59741cE = external global %"struct.PR5974::C" 23 // CHECK: @_ZN6PR59741aE = global %"struct.PR5974::A"* getelementptr inbounds (%"struct.PR5974::C"* @_ZN6PR59741cE, i32 0, i32 0) 24 // CHECK: @_ZN6PR59741bE = global %"struct.PR5974::B"* bitcast (i8* getelementptr (i8* bitcast (%"struct.PR5974::C"* @_ZN6PR59741cE to i8*), i64 4) to %"struct.PR5974::B"*), align 8 25 26 // CHECK: call void @_ZN1AC1Ev(%struct.A* @a) 27 // CHECK: call i32 @__cxa_atexit(void (i8*)* bitcast (void (%struct.A*)* @_ZN1AD1Ev to void (i8*)*), i8* getelementptr inbounds (%struct.A* @a, i32 0, i32 0), i8* @__dso_handle) 28 A a; 29 30 // CHECK: call void @_ZN1BC1Ev(%struct.B* @b) 31 // CHECK: call i32 @__cxa_atexit(void (i8*)* bitcast (void (%struct.B*)* @_ZN1BD1Ev to void (i8*)*), i8* getelementptr inbounds (%struct.B* @b, i32 0, i32 0), i8* @__dso_handle) 32 B b; 33 34 // PR6205: this should not require a global initializer 35 // CHECK-NOT: call void @_ZN1CC1Ev(%struct.C* @c) 36 C c; 37 38 // CHECK: call i32 @__cxa_atexit(void (i8*)* bitcast (void (%struct.D*)* @_ZN1DD1Ev to void (i8*)*), i8* getelementptr inbounds (%struct.D* @d, i32 0, i32 0), i8* @__dso_handle) 39 D d; 40 41 // <rdar://problem/7458115> 42 namespace test1 { 43 int f(); 44 const int x = f(); // This has side-effects and gets emitted immediately. 45 const int y = x - 1; // This gets deferred. 46 const int z = ~y; // This also gets deferred, but gets "undeferred" before y. 47 int test() { return z; } 48 // CHECK-LABEL: define i32 @_ZN5test14testEv() 49 50 // All of these initializers end up delayed, so we check them later. 51 } 52 53 // <rdar://problem/8246444> 54 namespace test2 { 55 struct allocator { allocator(); ~allocator(); }; 56 struct A { A(const allocator &a = allocator()); ~A(); }; 57 58 A a; 59 // CHECK: call void @_ZN5test29allocatorC1Ev( 60 // CHECK: invoke void @_ZN5test21AC1ERKNS_9allocatorE( 61 // CHECK: call void @_ZN5test29allocatorD1Ev( 62 // CHECK: call i32 @__cxa_atexit({{.*}} @_ZN5test21AD1Ev {{.*}} @_ZN5test21aE 63 } 64 65 namespace test3 { 66 // Tested at the beginning of the file. 67 const char * const var = "string"; 68 extern const char * const var; 69 70 const char *test() { return var; } 71 } 72 73 namespace test4 { 74 struct A { 75 A(); 76 }; 77 extern int foo(); 78 79 // This needs an initialization function and guard variables. 80 // CHECK: load i8* bitcast (i64* @_ZGVN5test41xE 81 // CHECK: [[CALL:%.*]] = call i32 @_ZN5test43fooEv 82 // CHECK-NEXT: store i32 [[CALL]], i32* @_ZN5test41xE 83 // CHECK-NEXT: store i64 1, i64* @_ZGVN5test41xE 84 __attribute__((weak)) int x = foo(); 85 } 86 87 namespace PR5974 { 88 struct A { int a; }; 89 struct B { int b; }; 90 struct C : A, B { int c; }; 91 92 extern C c; 93 94 // These should not require global initializers. 95 A* a = &c; 96 B* b = &c; 97 } 98 99 // PR9570: the indirect field shouldn't crash IR gen. 100 namespace test5 { 101 static union { 102 unsigned bar[4096] __attribute__((aligned(128))); 103 }; 104 } 105 106 namespace std { struct type_info; } 107 108 namespace test6 { 109 struct A { virtual ~A(); }; 110 struct B : A {}; 111 extern A *p; 112 113 // We must emit a dynamic initializer for 'q', because it could throw. 114 B *const q = &dynamic_cast<B&>(*p); 115 // CHECK: call void @__cxa_bad_cast() 116 // CHECK: store {{.*}} @_ZN5test6L1qE 117 118 // We don't need to emit 'r' at all, because it has internal linkage, is 119 // unused, and its initialization has no side-effects. 120 B *const r = dynamic_cast<B*>(p); 121 // CHECK-NOT: call void @__cxa_bad_cast() 122 // CHECK-NOT: store {{.*}} @_ZN5test6L1rE 123 124 // This can throw, so we need to emit it. 125 const std::type_info *const s = &typeid(*p); 126 // CHECK: store {{.*}} @_ZN5test6L1sE 127 128 // This can't throw, so we don't. 129 const std::type_info *const t = &typeid(p); 130 // CHECK-NOT: @_ZN5test6L1tE 131 132 extern B *volatile v; 133 // CHECK: store {{.*}} @_ZN5test6L1wE 134 B *const w = dynamic_cast<B*>(v); 135 136 // CHECK: load volatile 137 // CHECK: store {{.*}} @_ZN5test6L1xE 138 const int x = *(volatile int*)0x1234; 139 140 namespace { 141 int a = int(); 142 volatile int b = int(); 143 int c = a; 144 int d = b; 145 // CHECK-NOT: store {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1aE 146 // CHECK-NOT: store {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1bE 147 // CHECK-NOT: store {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1cE 148 // CHECK: load volatile {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1bE 149 // CHECK: store {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1dE 150 } 151 } 152 153 namespace test7 { 154 struct A { A(); }; 155 struct B { ~B(); int n; }; 156 struct C { C() = default; C(const C&); int n; }; 157 struct D {}; 158 159 // CHECK: call void @_ZN5test71AC1Ev({{.*}}@_ZN5test7L1aE) 160 const A a = A(); 161 162 // CHECK: call i32 @__cxa_atexit({{.*}} @_ZN5test71BD1Ev{{.*}} @_ZN5test7L2b1E 163 // CHECK: call i32 @__cxa_atexit({{.*}} @_ZN5test71BD1Ev{{.*}} @_ZGRN5test72b2E 164 // CHECK: call void @_ZN5test71BD1Ev( 165 // CHECK: store {{.*}} @_ZN5test7L2b3E 166 const B b1 = B(); 167 const B &b2 = B(); 168 const int b3 = B().n; 169 170 // CHECK-NOT: @_ZN5test7L2c1E 171 // CHECK: @_ZN5test7L2c2E 172 // CHECK-NOT: @_ZN5test7L2c3E 173 // CHECK: @_ZN5test7L2c4E 174 const C c1 = C(); 175 const C c2 = static_cast<const C&>(C()); 176 const int c3 = C().n; 177 const int c4 = C(C()).n; 178 179 // CHECK-NOT: @_ZN5test7L1dE 180 const D d = D(); 181 182 // CHECK: store {{.*}} @_ZN5test71eE 183 int f(), e = f(); 184 } 185 186 187 // At the end of the file, we check that y is initialized before z. 188 189 // CHECK: define internal void [[TEST1_Z_INIT:@.*]]() 190 // CHECK: load i32* @_ZN5test1L1yE 191 // CHECK-NEXT: xor 192 // CHECK-NEXT: store i32 {{.*}}, i32* @_ZN5test1L1zE 193 // CHECK: define internal void [[TEST1_Y_INIT:@.*]]() 194 // CHECK: load i32* @_ZN5test1L1xE 195 // CHECK-NEXT: sub 196 // CHECK-NEXT: store i32 {{.*}}, i32* @_ZN5test1L1yE 197 198 // CHECK: define internal void @_GLOBAL__sub_I_global_init.cpp() section "__TEXT,__StaticInit,regular,pure_instructions" { 199 // CHECK: call void [[TEST1_Y_INIT]] 200 // CHECK: call void [[TEST1_Z_INIT]] 201 202 // rdar://problem/8090834: this should be nounwind 203 // CHECK-NOEXC: define internal void @_GLOBAL__sub_I_global_init.cpp() [[NUW:#[0-9]+]] section "__TEXT,__StaticInit,regular,pure_instructions" { 204 205 // CHECK-NOEXC: attributes [[NUW]] = { nounwind } 206
