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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | |