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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
; RUN: opt -S -winehprepare -sehprepare -mtriple=x86_64-windows-msvc < %s | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc"
declare void @cleanup()
declare i32 @filt()
declare void @might_crash()
declare i32 @__C_specific_handler(...)
declare i32 @llvm.eh.typeid.for(i8*)
define i32 @simple_except_store() {
entry:
%retval = alloca i32
store i32 0, i32* %retval
invoke void @might_crash()
to label %return unwind label %lpad
lpad:
%ehvals = landingpad { i8*, i32 } personality i32 (...)* @__C_specific_handler
catch i32 ()* @filt
%sel = extractvalue { i8*, i32 } %ehvals, 1
%filt_sel = tail call i32 @llvm.eh.typeid.for(i8* bitcast (i32 ()* @filt to i8*))
%matches = icmp eq i32 %sel, %filt_sel
br i1 %matches, label %__except, label %eh.resume
__except:
store i32 1, i32* %retval
br label %return
return:
%r = load i32, i32* %retval
ret i32 %r
eh.resume:
resume { i8*, i32 } %ehvals
}
; CHECK-LABEL: define i32 @simple_except_store()
; CHECK: landingpad { i8*, i32 }
; CHECK-NEXT: catch i32 ()* @filt
; CHECK-NEXT: call i8* (...) @llvm.eh.actions(i32 1, i8* bitcast (i32 ()* @filt to i8*), i32 -1, i8* blockaddress(@simple_except_store, %__except))
; CHECK-NEXT: indirectbr {{.*}} [label %__except]
define i32 @catch_all() {
entry:
%retval = alloca i32
store i32 0, i32* %retval
invoke void @might_crash()
to label %return unwind label %lpad
lpad:
%ehvals = landingpad { i8*, i32 } personality i32 (...)* @__C_specific_handler
catch i8* null
store i32 1, i32* %retval
br label %return
return:
%r = load i32, i32* %retval
ret i32 %r
}
; CHECK-LABEL: define i32 @catch_all()
; CHECK: landingpad { i8*, i32 }
; CHECK-NEXT: catch i8* null
; CHECK-NEXT: call i8* (...) @llvm.eh.actions(i32 1, i8* null, i32 -1, i8* blockaddress(@catch_all, %catch.all))
; CHECK-NEXT: indirectbr {{.*}} [label %catch.all]
;
; CHECK: catch.all:
; CHECK: store i32 1, i32* %retval
define i32 @except_phi() {
entry:
invoke void @might_crash()
to label %return unwind label %lpad
lpad:
%ehvals = landingpad { i8*, i32 } personality i32 (...)* @__C_specific_handler
catch i32 ()* @filt
%sel = extractvalue { i8*, i32 } %ehvals, 1
%filt_sel = tail call i32 @llvm.eh.typeid.for(i8* bitcast (i32 ()* @filt to i8*))
%matches = icmp eq i32 %sel, %filt_sel
br i1 %matches, label %return, label %eh.resume
return:
%r = phi i32 [0, %entry], [1, %lpad]
ret i32 %r
eh.resume:
resume { i8*, i32 } %ehvals
}
; CHECK-LABEL: define i32 @except_phi()
; CHECK: landingpad { i8*, i32 }
; CHECK-NEXT: catch i32 ()* @filt
; CHECK-NEXT: call i8* (...) @llvm.eh.actions(i32 1, i8* bitcast (i32 ()* @filt to i8*), i32 -1, i8* blockaddress(@except_phi, %lpad.return_crit_edge))
; CHECK-NEXT: indirectbr {{.*}} [label %lpad.return_crit_edge]
;
; CHECK: lpad.return_crit_edge:
; CHECK: br label %return
;
; CHECK: return:
; CHECK-NEXT: %r = phi i32 [ 0, %entry ], [ 1, %lpad.return_crit_edge ]
; CHECK-NEXT: ret i32 %r
define i32 @lpad_phi() {
entry:
invoke void @might_crash()
to label %cont unwind label %lpad
cont:
invoke void @might_crash()
to label %return unwind label %lpad
lpad:
%ncalls.1 = phi i32 [ 0, %entry ], [ 1, %cont ]
%ehvals = landingpad { i8*, i32 } personality i32 (...)* @__C_specific_handler
catch i32 ()* @filt
%sel = extractvalue { i8*, i32 } %ehvals, 1
%filt_sel = tail call i32 @llvm.eh.typeid.for(i8* bitcast (i32 ()* @filt to i8*))
%matches = icmp eq i32 %sel, %filt_sel
br i1 %matches, label %return, label %eh.resume
return:
%r = phi i32 [2, %cont], [%ncalls.1, %lpad]
ret i32 %r
eh.resume:
resume { i8*, i32 } %ehvals
}
; CHECK-LABEL: define i32 @lpad_phi()
; CHECK: alloca i32
; CHECK: store i32 0, i32*
; CHECK: invoke void @might_crash()
; CHECK: store i32 1, i32*
; CHECK: invoke void @might_crash()
; CHECK: landingpad { i8*, i32 }
; CHECK-NEXT: cleanup
; CHECK-NEXT: catch i32 ()* @filt
; CHECK-NEXT: call i8* (...) @llvm.eh.actions(i32 0, void (i8*, i8*)* @lpad_phi.cleanup, i32 1, i8* bitcast (i32 ()* @filt to i8*), i32 -1, i8* blockaddress(@lpad_phi, %lpad.return_crit_edge))
; CHECK-NEXT: indirectbr {{.*}} [label %lpad.return_crit_edge]
;
; CHECK: lpad.return_crit_edge:
; CHECK: load i32, i32*
; CHECK: br label %return
;
; CHECK: return:
; CHECK-NEXT: %r = phi i32 [ 2, %cont ], [ %{{.*}}, %lpad.return_crit_edge ]
; CHECK-NEXT: ret i32 %r
define i32 @cleanup_and_except() {
entry:
invoke void @might_crash()
to label %return unwind label %lpad
lpad:
%ehvals = landingpad { i8*, i32 } personality i32 (...)* @__C_specific_handler
cleanup
catch i32 ()* @filt
call void @cleanup()
%sel = extractvalue { i8*, i32 } %ehvals, 1
%filt_sel = tail call i32 @llvm.eh.typeid.for(i8* bitcast (i32 ()* @filt to i8*))
%matches = icmp eq i32 %sel, %filt_sel
br i1 %matches, label %return, label %eh.resume
return:
%r = phi i32 [0, %entry], [1, %lpad]
ret i32 %r
eh.resume:
resume { i8*, i32 } %ehvals
}
; CHECK-LABEL: define i32 @cleanup_and_except()
; CHECK: landingpad { i8*, i32 }
; CHECK-NEXT: cleanup
; CHECK-NEXT: catch i32 ()* @filt
; CHECK-NEXT: call i8* (...) @llvm.eh.actions(
; CHECK: i32 0, void (i8*, i8*)* @cleanup_and_except.cleanup,
; CHECK: i32 1, i8* bitcast (i32 ()* @filt to i8*), i32 -1, i8* blockaddress(@cleanup_and_except, %lpad.return_crit_edge))
; CHECK-NEXT: indirectbr {{.*}} [label %lpad.return_crit_edge]
;
; CHECK: lpad.return_crit_edge:
; CHECK: br label %return
;
; CHECK: return:
; CHECK-NEXT: %r = phi i32 [ 0, %entry ], [ 1, %lpad.return_crit_edge ]
; CHECK-NEXT: ret i32 %r
; FIXME: This cleanup is an artifact of bad demotion.
; CHECK-LABEL: define internal void @lpad_phi.cleanup(i8*, i8*)
; CHECK: load i32
; CHECK: store i32 %{{.*}}, i32*
|
