1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
// RUN: %clang_cc1 %s -triple x86_64-pc-win32 -fms-extensions -emit-llvm -o - | FileCheck %s
void try_body(int numerator, int denominator, int *myres) {
*myres = numerator / denominator;
}
// CHECK-LABEL: define void @try_body(i32 %numerator, i32 %denominator, i32* %myres)
// CHECK: sdiv i32
// CHECK: store i32 %{{.*}}, i32*
// CHECK: ret void
int safe_div(int numerator, int denominator, int *res) {
int myres = 0;
int success = 1;
__try {
try_body(numerator, denominator, &myres);
} __except (1) {
success = -42;
}
*res = myres;
return success;
}
// CHECK-LABEL: define i32 @safe_div(i32 %numerator, i32 %denominator, i32* %res) {{.*}} personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*)
// CHECK: invoke void @try_body(i32 %{{.*}}, i32 %{{.*}}, i32* %{{.*}}) #[[NOINLINE:[0-9]+]]
// CHECK: to label %{{.*}} unwind label %[[lpad:[^ ]*]]
//
// CHECK: [[lpad]]
// CHECK: landingpad { i8*, i32 }
// CHECK-NEXT: catch i8* null
// CHECK-NOT: br i1
// CHECK: br label %[[except:[^ ]*]]
// CHECK: [[except]]
// CHECK-NEXT: store i32 -42, i32* %[[success:[^ ]*]]
//
// CHECK: %[[res:[^ ]*]] = load i32, i32* %[[success]]
// CHECK: ret i32 %[[res]]
void j(void);
int filter_expr_capture(void) {
int r = 42;
__try {
j();
} __except(r = -1) {
r = 13;
}
return r;
}
// CHECK-LABEL: define i32 @filter_expr_capture() {{.*}} personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*)
// CHECK: call void (...) @llvm.frameescape(i32* %[[r:[^ ,]*]])
// CHECK: store i32 42, i32* %[[r]]
// CHECK: invoke void @j() #[[NOINLINE]]
//
// CHECK: landingpad
// CHECK-NEXT: catch i8* bitcast (i32 (i8*, i8*)* @"\01?filt$0@0@filter_expr_capture@@" to i8*)
// CHECK: store i32 13, i32* %[[r]]
//
// CHECK: %[[rv:[^ ]*]] = load i32, i32* %[[r]]
// CHECK: ret i32 %[[rv]]
// CHECK-LABEL: define internal i32 @"\01?filt$0@0@filter_expr_capture@@"(i8* %exception_pointers, i8* %frame_pointer)
// CHECK: call i8* @llvm.framerecover(i8* bitcast (i32 ()* @filter_expr_capture to i8*), i8* %frame_pointer, i32 0)
// CHECK: store i32 -1, i32* %{{.*}}
// CHECK: ret i32 -1
int nested_try(void) {
int r = 42;
__try {
__try {
j();
r = 0;
} __except(_exception_code() == 123) {
r = 123;
}
} __except(_exception_code() == 456) {
r = 456;
}
return r;
}
// CHECK-LABEL: define i32 @nested_try() {{.*}} personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*)
// CHECK: store i32 42, i32* %[[r:[^ ,]*]]
// CHECK: invoke void @j() #[[NOINLINE]]
// CHECK: to label %[[cont:[^ ]*]] unwind label %[[lpad:[^ ]*]]
//
// CHECK: [[cont]]
// CHECK: store i32 0, i32* %[[r]]
// CHECK: br label %[[inner_try_cont:[^ ]*]]
//
// CHECK: [[lpad]]
// CHECK: landingpad { i8*, i32 }
// CHECK: catch i8* bitcast (i32 (i8*, i8*)* @"\01?filt$1@0@nested_try@@" to i8*)
// CHECK: catch i8* bitcast (i32 (i8*, i8*)* @"\01?filt$0@0@nested_try@@" to i8*)
// CHECK: store i8* %{{.*}}, i8** %[[ehptr_slot:[^ ]*]]
// CHECK: store i32 %{{.*}}, i32* %[[sel_slot:[^ ]*]]
//
// CHECK: load i32, i32* %[[sel_slot]]
// CHECK: call i32 @llvm.eh.typeid.for(i8* bitcast (i32 (i8*, i8*)* @"\01?filt$1@0@nested_try@@" to i8*))
// CHECK: icmp eq i32
// CHECK: br i1
//
// CHECK: load i32, i32* %[[sel_slot]]
// CHECK: call i32 @llvm.eh.typeid.for(i8* bitcast (i32 (i8*, i8*)* @"\01?filt$0@0@nested_try@@" to i8*))
// CHECK: icmp eq i32
// CHECK: br i1
//
// CHECK: store i32 456, i32* %[[r]]
// CHECK: br label %[[outer_try_cont:[^ ]*]]
//
// CHECK: [[outer_try_cont]]
// CHECK: %[[r_load:[^ ]*]] = load i32, i32* %[[r]]
// CHECK: ret i32 %[[r_load]]
//
// CHECK: store i32 123, i32* %[[r]]
// CHECK: br label %[[inner_try_cont]]
//
// CHECK: [[inner_try_cont]]
// CHECK: br label %[[outer_try_cont]]
static unsigned g = 0;
void basic_finally(void) {
++g;
__try {
j();
} __finally {
--g;
}
}
// CHECK-LABEL: define void @basic_finally() {{.*}} personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*)
// CHECK: load i32, i32* @g
// CHECK: add i32 %{{.*}}, 1
// CHECK: store i32 %{{.*}}, i32* @g
//
// CHECK: invoke void @j()
// CHECK: to label %[[cont:[^ ]*]] unwind label %[[lpad:[^ ]*]]
//
// CHECK: [[cont]]
// CHECK: %[[fp:[^ ]*]] = call i8* @llvm.frameaddress(i32 0)
// CHECK: call void @"\01?fin$0@0@basic_finally@@"(i8 0, i8* %[[fp]])
// CHECK: ret void
//
// CHECK: [[lpad]]
// CHECK: landingpad { i8*, i32 }
// CHECK-NEXT: cleanup
// CHECK: %[[fp:[^ ]*]] = call i8* @llvm.frameaddress(i32 0)
// CHECK: call void @"\01?fin$0@0@basic_finally@@"(i8 1, i8* %[[fp]])
// CHECK: resume
// CHECK: define internal void @"\01?fin$0@0@basic_finally@@"(i8 %abnormal_termination, i8* %frame_pointer)
// CHECK: load i32, i32* @g, align 4
// CHECK: add i32 %{{.*}}, -1
// CHECK: store i32 %{{.*}}, i32* @g, align 4
// CHECK: ret void
int returns_int(void);
int except_return(void) {
__try {
return returns_int();
} __except(1) {
return 42;
}
}
// CHECK-LABEL: define i32 @except_return()
// CHECK: %[[tmp:[^ ]*]] = invoke i32 @returns_int()
// CHECK: to label %[[cont:[^ ]*]] unwind label %[[lpad:[^ ]*]]
//
// CHECK: [[cont]]
// CHECK: store i32 %[[tmp]], i32* %[[rv:[^ ]*]]
// CHECK: br label %[[retbb:[^ ]*]]
//
// CHECK: [[lpad]]
// CHECK: store i32 42, i32* %[[rv]]
// CHECK: br label %[[retbb]]
//
// CHECK: [[retbb]]
// CHECK: %[[r:[^ ]*]] = load i32, i32* %[[rv]]
// CHECK: ret i32 %[[r]]
// CHECK: attributes #[[NOINLINE]] = { {{.*noinline.*}} }
|
