empty-catchpad.ll
3.51 KB
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
; RUN: opt < %s -simplifycfg -S | FileCheck %s
declare void @f()
declare void @llvm.foo(i32) nounwind
declare void @ProcessCLRException()
define void @test1() personality void ()* @ProcessCLRException {
entry:
invoke void @f()
to label %exit unwind label %exn.dispatch
exn.dispatch:
%cs = catchswitch within none [label %pad1, label %pad2] unwind to caller
pad1:
%cp1 = catchpad within %cs [i32 1]
call void @llvm.foo(i32 1)
catchret from %cp1 to label %exit
pad2:
%cp2 = catchpad within %cs [i32 2]
unreachable
exit:
ret void
}
; Remove unreachble catch2, leave catch1 as-is
; CHECK-LABEL: define void @test1()
; CHECK: %cs = catchswitch within none [label %pad1] unwind to caller
; CHECK-NOT: catchpad
; CHECK: %cp1 = catchpad within %cs [i32 1]
; CHECK-NOT: catchpad
; Remove both catchpads and the catchswitch from exn.dispatch
; CHECK-LABEL: define void @test2()
define void @test2() personality void ()* @ProcessCLRException {
entry:
invoke void @f()
to label %via.cleanup unwind label %exn.dispatch
; CHECK-NOT: invoke
; CHECK: call void @f()
via.cleanup:
invoke void @f()
to label %via.catchswitch unwind label %cleanup.inner
cleanup.inner:
%cp.inner = cleanuppad within none []
call void @llvm.foo(i32 0)
cleanupret from %cp.inner unwind label %exn.dispatch
; CHECK: cleanupret from %cp.inner unwind to caller
via.catchswitch:
invoke void @f()
to label %exit unwind label %dispatch.inner
dispatch.inner:
%cs.inner = catchswitch within none [label %pad.inner] unwind label %exn.dispatch
; CHECK: %cs.inner = catchswitch within none [label %pad.inner] unwind to caller
pad.inner:
%catch.inner = catchpad within %cs.inner [i32 0]
; CHECK: %catch.inner = catchpad within %cs.inner
call void @llvm.foo(i32 1)
catchret from %catch.inner to label %exit
exn.dispatch:
%cs = catchswitch within none [label %pad1, label %pad2] unwind to caller
; CHECK-NOT: catchswitch within
; CHECK-NOT: catchpad
pad1:
catchpad within %cs [i32 1]
unreachable
pad2:
catchpad within %cs [i32 2]
unreachable
exit:
ret void
}
; Same as @test2, but exn.dispatch catchswitch has an unwind dest that
; preds need to be reidrected to
; CHECK-LABEL: define void @test3()
define void @test3() personality void ()* @ProcessCLRException {
entry:
invoke void @f()
to label %via.cleanup unwind label %exn.dispatch
; CHECK: invoke void @f()
; CHECK-NEXT: to label %via.cleanup unwind label %cleanup
via.cleanup:
invoke void @f()
to label %via.catchswitch unwind label %cleanup.inner
cleanup.inner:
%cp.inner = cleanuppad within none []
call void @llvm.foo(i32 0)
cleanupret from %cp.inner unwind label %exn.dispatch
; CHECK: cleanupret from %cp.inner unwind label %cleanup
via.catchswitch:
invoke void @f()
to label %exit unwind label %dispatch.inner
dispatch.inner:
%cs.inner = catchswitch within none [label %pad.inner] unwind label %exn.dispatch
; CHECK: %cs.inner = catchswitch within none [label %pad.inner] unwind label %cleanup
pad.inner:
%catch.inner = catchpad within %cs.inner [i32 0]
; CHECK: %catch.inner = catchpad within %cs.inner
call void @llvm.foo(i32 1)
catchret from %catch.inner to label %exit
exn.dispatch:
%cs = catchswitch within none [label %pad1, label %pad2] unwind label %cleanup
; CHECK-NOT: catchswitch within
; CHECK-NOT: catchpad
pad1:
catchpad within %cs [i32 1]
unreachable
pad2:
catchpad within %cs [i32 2]
unreachable
cleanup:
%cp = cleanuppad within none []
call void @llvm.foo(i32 0)
cleanupret from %cp unwind to caller
exit:
ret void
}