1 // RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple=x86_64-pc-windows-msvc \
2 // RUN: -mconstructor-aliases -fexceptions -fcxx-exceptions \
3 // RUN: -O1 -disable-llvm-passes \
4 // RUN: | FileCheck -check-prefix WIN64 %s
5
6 extern "C" void might_throw();
7
8 // Simplify the generated IR with noexcept.
9 extern "C" void recover() noexcept(true);
10 extern "C" void handle_exception(void *e) noexcept(true);
11
catch_all()12 extern "C" void catch_all() {
13 try {
14 might_throw();
15 } catch (...) {
16 recover();
17 }
18 }
19
20 // WIN64-LABEL: define dso_local void @catch_all()
21 // WIN64: invoke void @might_throw()
22 // WIN64-NEXT: to label %[[cont:[^ ]*]] unwind label %[[catchswitch_lpad:[^ ]*]]
23 //
24 // WIN64: [[catchswitch_lpad]]
25 // WIN64: %[[catchswitch:[^ ]*]] = catchswitch within none [label %[[catchpad_lpad:[^ ]*]]] unwind to caller
26 //
27 // WIN64: [[catchpad_lpad]]
28 // WIN64: catchpad within %[[catchswitch]] [i8* null, i32 64, i8* null]
29 // WIN64: call void @recover()
30 // WIN64: catchret from %{{.*}} to label %[[catchret:[^ ]*]]
31 //
32 // WIN64: [[catchret]]
33 // WIN64-NEXT: br label %[[ret:[^ ]*]]
34 //
35 // WIN64: [[ret]]
36 // WIN64: ret void
37 //
38 // WIN64: [[cont]]
39 // WIN64: br label %[[ret]]
40
catch_int()41 extern "C" void catch_int() {
42 try {
43 might_throw();
44 } catch (int e) {
45 handle_exception(&e);
46 }
47 }
48
49 // WIN64-LABEL: define dso_local void @catch_int()
50 // WIN64: catchpad within %{{[^ ]*}} [%rtti.TypeDescriptor2* @"??_R0H@8", i32 0, i32* %[[e_addr:[^\]]*]]]
51 //
52 // The catchpad instruction starts the lifetime of 'e'. Unfortunately, that
53 // leaves us with nowhere to put lifetime.start, so we don't emit lifetime
54 // markers for now.
55 // WIN64-NOT: lifetime.start
56 //
57 // WIN64: %[[e_i8:[^ ]*]] = bitcast i32* %[[e_addr]] to i8*
58 // WIN64-NOT: lifetime.start
59 // WIN64: call void @handle_exception
60 // WIN64-SAME: (i8* %[[e_i8]])
61 // WIN64-NOT: lifetime.end
62 // WIN64: catchret
63
catch_int_unnamed()64 extern "C" void catch_int_unnamed() {
65 try {
66 might_throw();
67 } catch (int) {
68 }
69 }
70
71 // WIN64-LABEL: define dso_local void @catch_int_unnamed()
72 // WIN64: catchpad within %{{.*}} [%rtti.TypeDescriptor2* @"??_R0H@8", i32 0, i8* null]
73 // WIN64: catchret
74
75 struct A {
76 A();
77 A(const A &o);
78 ~A();
79 int a;
80 };
81
82 struct B : A {
83 B();
84 B(const B &o);
85 ~B();
86 int b;
87 };
88
catch_a_byval()89 extern "C" void catch_a_byval() {
90 try {
91 might_throw();
92 } catch (A e) {
93 handle_exception(&e);
94 }
95 }
96
97 // WIN64-LABEL: define dso_local void @catch_a_byval()
98 // WIN64: %[[e_addr:[^ ]*]] = alloca %struct.A
99 // WIN64: catchpad within %{{[^ ]*}} [%rtti.TypeDescriptor7* @"??_R0?AUA@@@8", i32 0, %struct.A* %[[e_addr]]]
100 // WIN64: %[[e_i8:[^ ]*]] = bitcast %struct.A* %[[e_addr]] to i8*
101 // WIN64: call void @handle_exception(i8* %[[e_i8]])
102 // WIN64: catchret
103
catch_a_ref()104 extern "C" void catch_a_ref() {
105 try {
106 might_throw();
107 } catch (A &e) {
108 handle_exception(&e);
109 }
110 }
111
112 // WIN64-LABEL: define dso_local void @catch_a_ref()
113 // WIN64: %[[e_addr:[^ ]*]] = alloca %struct.A*
114 // WIN64: catchpad within %{{[^ ]*}} [%rtti.TypeDescriptor7* @"??_R0?AUA@@@8", i32 8, %struct.A** %[[e_addr]]]
115 // WIN64: %[[eptr:[^ ]*]] = load %struct.A*, %struct.A** %[[e_addr]]
116 // WIN64: %[[eptr_i8:[^ ]*]] = bitcast %struct.A* %[[eptr]] to i8*
117 // WIN64: call void @handle_exception(i8* %[[eptr_i8]])
118 // WIN64: catchret
119
fn_with_exc_spec()120 extern "C" void fn_with_exc_spec() throw(int) {
121 might_throw();
122 }
123
124 // WIN64-LABEL: define dso_local void @fn_with_exc_spec()
125 // WIN64: call void @might_throw()
126 // WIN64-NEXT: ret void
127
catch_nested()128 extern "C" void catch_nested() {
129 try {
130 might_throw();
131 } catch (int) {
132 try {
133 might_throw();
134 } catch (int) {
135 might_throw();
136 }
137 }
138 }
139
140 // WIN64-LABEL: define dso_local void @catch_nested()
141 // WIN64: invoke void @might_throw()
142 // WIN64-NEXT: to label %{{.*}} unwind label %[[catchswitch_outer:[^ ]*]]
143 //
144 // WIN64: [[catchswitch_outer]]
145 // WIN64: %[[catchswitch_outer_scope:[^ ]*]] = catchswitch within none [label %[[catch_int_outer:[^ ]*]]] unwind to caller
146 //
147 // WIN64: [[catch_int_outer]]
148 // WIN64: %[[catchpad:[^ ]*]] = catchpad within %[[catchswitch_outer_scope]] [%rtti.TypeDescriptor2* @"??_R0H@8", i32 0, i8* null]
149 // WIN64: invoke void @might_throw()
150 // WIN64-NEXT: to label %[[cont2:[^ ]*]] unwind label %[[catchswitch_inner:[^ ]*]]
151 //
152 // WIN64: [[catchswitch_inner]]
153 // WIN64: %[[catchswitch_inner_scope:[^ ]*]] = catchswitch within %[[catchpad]] [label %[[catch_int_inner:[^ ]*]]] unwind to caller
154 //
155 // WIN64: [[catch_int_inner]]
156 // WIN64: catchpad within %[[catchswitch_inner_scope]] [%rtti.TypeDescriptor2* @"??_R0H@8", i32 0, i8* null]
157 // WIN64-NEXT: call void @might_throw()
158 // WIN64: catchret {{.*}} to label %[[catchret2:[^ ]*]]
159 //
160 // WIN64: [[catchret2]]
161 // WIN64: catchret {{.*}} to label %[[mainret:[^ ]*]]
162 //
163 // WIN64: [[mainret]]
164 // WIN64: ret void
165