1 // RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-pc-win32 -mconstructor-aliases -cxx-abi microsoft -fexceptions -fno-rtti | FileCheck -check-prefix WIN32 %s 2 3 struct A { 4 A(); 5 ~A(); 6 int a; 7 }; 8 9 A getA(); 10 11 int TakesTwo(A a, A b); 12 void HasEHCleanup() { 13 TakesTwo(getA(), getA()); 14 } 15 16 // With exceptions, we need to clean up at least one of these temporaries. 17 // WIN32: define void @"\01?HasEHCleanup@@YAXXZ"() {{.*}} { 18 // First one doesn't have any cleanups, no need for invoke. 19 // WIN32: call void @"\01?getA@@YA?AUA@@XZ"(%struct.A* sret %{{.*}}) 20 // If this call throws, we have to cleanup the first temporary. 21 // WIN32: invoke void @"\01?getA@@YA?AUA@@XZ"(%struct.A* sret %{{.*}}) 22 // If this call throws, we already popped our cleanups 23 // WIN32: call i32 @"\01?TakesTwo@@YAHUA@@0@Z" 24 // WIN32: ret void 25 // 26 // There should be one dtor call for unwinding from the second getA. 27 // WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ" 28 // WIN32: } 29 30 void TakeRef(const A &a); 31 int HasDeactivatedCleanups() { 32 return TakesTwo((TakeRef(A()), A()), (TakeRef(A()), A())); 33 } 34 35 // WIN32: define i32 @"\01?HasDeactivatedCleanups@@YAHXZ"() {{.*}} { 36 // WIN32: %[[isactive:.*]] = alloca i1 37 // WIN32: call x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ" 38 // WIN32: invoke void @"\01?TakeRef@@YAXABUA@@@Z" 39 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %[[arg1:.*]]) 40 // WIN32: store i1 true, i1* %[[isactive]] 41 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ" 42 // WIN32: invoke void @"\01?TakeRef@@YAXABUA@@@Z" 43 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ" 44 // WIN32: store i1 false, i1* %[[isactive]] 45 // WIN32: invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z" 46 // Destroy the two const ref temporaries. 47 // WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ" 48 // WIN32: call x86_thiscallcc void @"\01??1A@@QAE@XZ" 49 // WIN32: ret i32 50 // 51 // Conditionally destroy arg1. 52 // WIN32: %[[cond:.*]] = load i1* %[[isactive]] 53 // WIN32: br i1 %[[cond]] 54 // WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %[[arg1]]) 55 // WIN32: } 56 57 // Test putting the cleanups inside a conditional. 58 int CouldThrow(); 59 int HasConditionalCleanup(bool cond) { 60 return (cond ? TakesTwo(A(), A()) : CouldThrow()); 61 } 62 63 // WIN32: define i32 @"\01?HasConditionalCleanup@@YAH_N@Z"(i1 zeroext %{{.*}}) {{.*}} { 64 // WIN32: store i1 false 65 // WIN32: br i1 66 // No cleanups, so we call and then activate a cleanup if it succeeds. 67 // WIN32: call x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %[[arg1:.*]]) 68 // WIN32: store i1 true 69 // Now we have a cleanup for the first aggregate, so we invoke. 70 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %{{.*}}) 71 // Now we have no cleanups because TakeTwo will destruct both args. 72 // WIN32: call i32 @"\01?TakesTwo@@YAHUA@@0@Z" 73 // Still no cleanups, so call. 74 // WIN32: call i32 @"\01?CouldThrow@@YAHXZ"() 75 // Somewhere in the landing pad for our single invoke, call the dtor. 76 // WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %[[arg1]]) 77 // WIN32: } 78 79 // Now test both. 80 int HasConditionalDeactivatedCleanups(bool cond) { 81 return (cond ? TakesTwo((TakeRef(A()), A()), (TakeRef(A()), A())) : CouldThrow()); 82 } 83 84 // WIN32: define i32 @"\01?HasConditionalDeactivatedCleanups@@YAH_N@Z"{{.*}} { 85 // WIN32: %[[arg1:.*]] = alloca %struct.A, align 4 86 // WIN32: alloca i1 87 // WIN32: %[[arg1_cond:.*]] = alloca i1 88 // Start all four cleanups as deactivated. 89 // WIN32: store i1 false 90 // WIN32: store i1 false 91 // WIN32: store i1 false 92 // WIN32: store i1 false 93 // WIN32: br i1 94 // True condition. 95 // WIN32: call x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ" 96 // WIN32: store i1 true 97 // WIN32: invoke void @"\01?TakeRef@@YAXABUA@@@Z" 98 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %[[arg1]]) 99 // WIN32: store i1 true, i1* %[[arg1_cond]] 100 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ" 101 // WIN32: store i1 true 102 // WIN32: invoke void @"\01?TakeRef@@YAXABUA@@@Z" 103 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ" 104 // WIN32: store i1 true 105 // WIN32: store i1 false, i1* %[[arg1_cond]] 106 // WIN32: invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z" 107 // False condition. 108 // WIN32: invoke i32 @"\01?CouldThrow@@YAHXZ"() 109 // Two normal cleanups for TakeRef args. 110 // WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ" 111 // WIN32: call x86_thiscallcc void @"\01??1A@@QAE@XZ" 112 // WIN32: ret i32 113 // 114 // Somewhere in the landing pad soup, we conditionally destroy arg1. 115 // WIN32: %[[isactive:.*]] = load i1* %[[arg1_cond]] 116 // WIN32: br i1 %[[isactive]] 117 // WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %[[arg1]]) 118 // WIN32: } 119 120 namespace crash_on_partial_destroy { 121 struct A { 122 virtual ~A(); 123 }; 124 125 struct B : virtual A { 126 // Has an implicit destructor. 127 }; 128 129 struct C : B { 130 C(); 131 }; 132 133 void foo(); 134 // We used to crash when emitting this. 135 C::C() { foo(); } 136 137 // Verify that we don't bother with a vbtable lookup when adjusting the this 138 // pointer to call a base destructor from a constructor while unwinding. 139 // WIN32-LABEL: define {{.*}} @"\01??0C@crash_on_partial_destroy@@QAE@XZ"{{.*}} { 140 // WIN32: landingpad 141 // 142 // We shouldn't do any vbptr loads, just constant GEPs. 143 // WIN32-NOT: load 144 // WIN32: getelementptr i8* %{{.*}}, i32 4 145 // WIN32-NOT: load 146 // WIN32: bitcast i8* %{{.*}} to %"struct.crash_on_partial_destroy::B"* 147 // WIN32: invoke x86_thiscallcc void @"\01??1B@crash_on_partial_destroy@@UAE@XZ" 148 // 149 // WIN32-NOT: load 150 // WIN32: bitcast %"struct.crash_on_partial_destroy::C"* %{{.*}} to i8* 151 // WIN32-NOT: load 152 // WIN32: getelementptr inbounds i8* %{{.*}}, i64 4 153 // WIN32-NOT: load 154 // WIN32: bitcast i8* %{{.*}} to %"struct.crash_on_partial_destroy::A"* 155 // WIN32: invoke x86_thiscallcc void @"\01??1A@crash_on_partial_destroy@@UAE@XZ" 156 // WIN32: } 157 } 158