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
|
; RUN: opt -S -winehprepare -dwarfehprepare -mtriple x86_64-pc-windows-msvc < %s | FileCheck %s
; FIXME: Add and test outlining here.
declare void @maybe_throw()
@_ZTIi = external constant i8*
@g = external global i32
declare i32 @__C_specific_handler(...)
declare i32 @__gxx_personality_seh0(...)
declare i32 @llvm.eh.typeid.for(i8*) readnone nounwind
define i32 @use_seh() {
entry:
invoke void @maybe_throw()
to label %cont unwind label %lpad
cont:
ret i32 0
lpad:
%ehvals = landingpad { i8*, i32 } personality i32 (...)* @__C_specific_handler
cleanup
catch i8* bitcast (i32 (i8*, i8*)* @filt_g to i8*)
%ehsel = extractvalue { i8*, i32 } %ehvals, 1
%filt_g_sel = call i32 @llvm.eh.typeid.for(i8* bitcast (i32 (i8*, i8*)* @filt_g to i8*))
%matches = icmp eq i32 %ehsel, %filt_g_sel
br i1 %matches, label %ret1, label %eh.resume
ret1:
ret i32 1
eh.resume:
resume { i8*, i32 } %ehvals
}
define internal i32 @filt_g(i8*, i8*) {
%g = load i32, i32* @g
ret i32 %g
}
; CHECK-LABEL: define i32 @use_seh()
; CHECK: invoke void @maybe_throw()
; CHECK-NEXT: to label %cont unwind label %lpad
; CHECK: eh.resume:
; CHECK-NEXT: unreachable
; A MinGW64-ish EH style. It could happen if a binary uses both MSVC CRT and
; mingw CRT and is linked with LTO.
define i32 @use_gcc() {
entry:
invoke void @maybe_throw()
to label %cont unwind label %lpad
cont:
ret i32 0
lpad:
%ehvals = landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_seh0
cleanup
catch i8* bitcast (i8** @_ZTIi to i8*)
%ehsel = extractvalue { i8*, i32 } %ehvals, 1
%filt_g_sel = call i32 @llvm.eh.typeid.for(i8* bitcast (i32 (i8*, i8*)* @filt_g to i8*))
%matches = icmp eq i32 %ehsel, %filt_g_sel
br i1 %matches, label %ret1, label %eh.resume
ret1:
ret i32 1
eh.resume:
resume { i8*, i32 } %ehvals
}
; CHECK-LABEL: define i32 @use_gcc()
; CHECK: invoke void @maybe_throw()
; CHECK-NEXT: to label %cont unwind label %lpad
; CHECK: eh.resume:
; CHECK: call void @_Unwind_Resume(i8* %exn.obj)
|
