1 // RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-pc-win32 -mconstructor-aliases -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);
HasEHCleanup()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-LABEL: define void @"\01?HasEHCleanup@@YAXXZ"() {{.*}} {
18 // WIN32: %[[base:.*]] = call i8* @llvm.stacksave()
19 // If this call throws, we have to restore the stack.
20 // WIN32: invoke void @"\01?getA@@YA?AUA@@XZ"(%struct.A* sret %{{.*}})
21 // If this call throws, we have to cleanup the first temporary.
22 // WIN32: invoke void @"\01?getA@@YA?AUA@@XZ"(%struct.A* sret %{{.*}})
23 // If this call throws, we have to cleanup the stacksave.
24 // WIN32: invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z"
25 // WIN32: call void @llvm.stackrestore(i8* %[[base]])
26 // WIN32: ret void
27 //
28 // There should be one dtor call for unwinding from the second getA.
29 // WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
30 // WIN32-NOT: @"\01??1A@@QAE@XZ"
31 // WIN32: call void @llvm.stackrestore
32 // WIN32: }
33
34 void TakeRef(const A &a);
HasDeactivatedCleanups()35 int HasDeactivatedCleanups() {
36 return TakesTwo((TakeRef(A()), A()), (TakeRef(A()), A()));
37 }
38
39 // WIN32-LABEL: define i32 @"\01?HasDeactivatedCleanups@@YAHXZ"() {{.*}} {
40 // WIN32: %[[isactive:.*]] = alloca i1
41 // WIN32: call i8* @llvm.stacksave()
42 // WIN32: %[[argmem:.*]] = alloca inalloca [[argmem_ty:<{ %struct.A, %struct.A }>]]
43 // WIN32: %[[arg1:.*]] = getelementptr inbounds [[argmem_ty]]* %[[argmem]], i32 0, i32 1
44 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
45 // WIN32: invoke void @"\01?TakeRef@@YAXABUA@@@Z"
46 //
47 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %[[arg1]])
48 // WIN32: store i1 true, i1* %[[isactive]]
49 //
50 // WIN32: %[[arg0:.*]] = getelementptr inbounds [[argmem_ty]]* %[[argmem]], i32 0, i32 0
51 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
52 // WIN32: invoke void @"\01?TakeRef@@YAXABUA@@@Z"
53 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
54 // WIN32: store i1 false, i1* %[[isactive]]
55 //
56 // WIN32: invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z"([[argmem_ty]]* inalloca %[[argmem]])
57 // WIN32: call void @llvm.stackrestore
58 // Destroy the two const ref temporaries.
59 // WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
60 // WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
61 // WIN32: ret i32
62 //
63 // Conditionally destroy arg1.
64 // WIN32: %[[cond:.*]] = load i1* %[[isactive]]
65 // WIN32: br i1 %[[cond]]
66 // WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %[[arg1]])
67 // WIN32: }
68
69 // Test putting the cleanups inside a conditional.
70 int CouldThrow();
HasConditionalCleanup(bool cond)71 int HasConditionalCleanup(bool cond) {
72 return (cond ? TakesTwo(A(), A()) : CouldThrow());
73 }
74
75 // WIN32-LABEL: define i32 @"\01?HasConditionalCleanup@@YAH_N@Z"(i1 zeroext %{{.*}}) {{.*}} {
76 // WIN32: store i1 false
77 // WIN32: br i1
78 // WIN32: call i8* @llvm.stacksave()
79 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %{{.*}})
80 // WIN32: store i1 true
81 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %{{.*}})
82 // WIN32: invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z"
83 // WIN32: call void @llvm.stackrestore
84 //
85 // WIN32: call i32 @"\01?CouldThrow@@YAHXZ"()
86 //
87 // Only one dtor in the invoke for arg1
88 // WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"({{.*}})
89 // WIN32-NOT: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
90 // WIN32: call void @llvm.stackrestore
91 // WIN32: }
92
93 // Now test both.
HasConditionalDeactivatedCleanups(bool cond)94 int HasConditionalDeactivatedCleanups(bool cond) {
95 return (cond ? TakesTwo((TakeRef(A()), A()), (TakeRef(A()), A())) : CouldThrow());
96 }
97
98 // WIN32-LABEL: define i32 @"\01?HasConditionalDeactivatedCleanups@@YAH_N@Z"{{.*}} {
99 // WIN32: alloca i1
100 // WIN32: %[[arg1_cond:.*]] = alloca i1
101 // Start all four cleanups as deactivated.
102 // WIN32: store i1 false
103 // WIN32: store i1 false
104 // WIN32: store i1 false
105 // WIN32: store i1 false
106 // WIN32: br i1
107 // True condition.
108 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
109 // WIN32: store i1 true
110 // WIN32: invoke void @"\01?TakeRef@@YAXABUA@@@Z"
111 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
112 // WIN32: store i1 true, i1* %[[arg1_cond]]
113 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
114 // WIN32: store i1 true
115 // WIN32: invoke void @"\01?TakeRef@@YAXABUA@@@Z"
116 // WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
117 // WIN32: store i1 true
118 // WIN32: store i1 false, i1* %[[arg1_cond]]
119 // WIN32: invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z"
120 // False condition.
121 // WIN32: invoke i32 @"\01?CouldThrow@@YAHXZ"()
122 // Two normal cleanups for TakeRef args.
123 // WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
124 // WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
125 // WIN32: ret i32
126 //
127 // Somewhere in the landing pad soup, we conditionally destroy arg1.
128 // WIN32: %[[isactive:.*]] = load i1* %[[arg1_cond]]
129 // WIN32: br i1 %[[isactive]]
130 // WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
131 // WIN32: }
132
133 namespace crash_on_partial_destroy {
134 struct A {
135 virtual ~A();
136 };
137
138 struct B : virtual A {
139 // Has an implicit destructor.
140 };
141
142 struct C : B {
143 C();
144 };
145
146 void foo();
147 // We used to crash when emitting this.
C()148 C::C() { foo(); }
149
150 // Verify that we don't bother with a vbtable lookup when adjusting the this
151 // pointer to call a base destructor from a constructor while unwinding.
152 // WIN32-LABEL: define {{.*}} @"\01??0C@crash_on_partial_destroy@@QAE@XZ"{{.*}} {
153 // WIN32: landingpad
154 //
155 // We shouldn't do any vbptr loads, just constant GEPs.
156 // WIN32-NOT: load
157 // WIN32: getelementptr i8* %{{.*}}, i32 4
158 // WIN32-NOT: load
159 // WIN32: bitcast i8* %{{.*}} to %"struct.crash_on_partial_destroy::B"*
160 // WIN32: invoke x86_thiscallcc void @"\01??1B@crash_on_partial_destroy@@UAE@XZ"
161 //
162 // WIN32-NOT: load
163 // WIN32: bitcast %"struct.crash_on_partial_destroy::C"* %{{.*}} to i8*
164 // WIN32-NOT: load
165 // WIN32: getelementptr inbounds i8* %{{.*}}, i64 4
166 // WIN32-NOT: load
167 // WIN32: bitcast i8* %{{.*}} to %"struct.crash_on_partial_destroy::A"*
168 // WIN32: invoke x86_thiscallcc void @"\01??1A@crash_on_partial_destroy@@UAE@XZ"
169 // WIN32: }
170 }
171