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
|
; RUN: opt -mtriple=x86_64-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s
; This test is based on the following code:
;
; class Obj {
; public:
; ~Obj();
; };
;
; void test(void)
; {
; try {
; Obj o;
; throw 1;
; } catch (...) {
; throw;
; }
; }
; ModuleID = 'cppeh-catch-and-throw.cpp'
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc"
%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
%eh.CatchableType = type { i32, i32, i32, i32, i32, i32, i32 }
%eh.CatchableTypeArray.1 = type { i32, [1 x i32] }
%eh.ThrowInfo = type { i32, i32, i32, i32 }
%class.Obj = type { i8 }
$"\01??_R0H@8" = comdat any
$"_CT??_R0H@84" = comdat any
$_CTA1H = comdat any
$_TI1H = comdat any
@"\01??_7type_info@@6B@" = external constant i8*
@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
@__ImageBase = external constant i8
@"_CT??_R0H@84" = linkonce_odr unnamed_addr constant %eh.CatchableType { i32 1, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32), i32 0, i32 -1, i32 0, i32 4, i32 0 }, section ".xdata", comdat
@_CTA1H = linkonce_odr unnamed_addr constant %eh.CatchableTypeArray.1 { i32 1, [1 x i32] [i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%eh.CatchableType* @"_CT??_R0H@84" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32)] }, section ".xdata", comdat
@_TI1H = linkonce_odr unnamed_addr constant %eh.ThrowInfo { i32 0, i32 0, i32 0, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%eh.CatchableTypeArray.1* @_CTA1H to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32) }, section ".xdata", comdat
; This is just a minimal check to verify that main was handled by WinEHPrepare.
; CHECK: define void @"\01?test@@YAXXZ"()
; CHECK: entry:
; CHECK: call void (...) @llvm.localescape
; CHECK: invoke void @_CxxThrowException
; CHECK: }
; Function Attrs: uwtable
define void @"\01?test@@YAXXZ"() #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
entry:
%o = alloca %class.Obj, align 1
%tmp = alloca i32, align 4
%exn.slot = alloca i8*
%ehselector.slot = alloca i32
store i32 1, i32* %tmp
%0 = bitcast i32* %tmp to i8*
invoke void @_CxxThrowException(i8* %0, %eh.ThrowInfo* @_TI1H) #3
to label %unreachable unwind label %lpad
lpad: ; preds = %entry
%1 = landingpad { i8*, i32 }
catch i8* null
%2 = extractvalue { i8*, i32 } %1, 0
store i8* %2, i8** %exn.slot
%3 = extractvalue { i8*, i32 } %1, 1
store i32 %3, i32* %ehselector.slot
call void @"\01??1Obj@@QEAA@XZ"(%class.Obj* %o) #2
br label %catch
catch: ; preds = %lpad
%exn = load i8*, i8** %exn.slot
call void @llvm.eh.begincatch(i8* %exn, i8* null) #2
invoke void @_CxxThrowException(i8* null, %eh.ThrowInfo* null) #3
to label %unreachable unwind label %lpad1
lpad1: ; preds = %catch
%4 = landingpad { i8*, i32 }
cleanup
%5 = extractvalue { i8*, i32 } %4, 0
store i8* %5, i8** %exn.slot
%6 = extractvalue { i8*, i32 } %4, 1
store i32 %6, i32* %ehselector.slot
call void @llvm.eh.endcatch() #2
br label %eh.resume
try.cont: ; No predecessors!
ret void
eh.resume: ; preds = %lpad1
%exn2 = load i8*, i8** %exn.slot
%sel = load i32, i32* %ehselector.slot
%lpad.val = insertvalue { i8*, i32 } undef, i8* %exn2, 0
%lpad.val3 = insertvalue { i8*, i32 } %lpad.val, i32 %sel, 1
resume { i8*, i32 } %lpad.val3
unreachable: ; preds = %catch, %entry
unreachable
}
; Verify that we inserted a stub invoke into the outlined cleanup handler.
;
; CHECK-LABEL: define internal void @"\01?test@@YAXXZ.cleanup"(i8*, i8*)
; CHECK: entry:
; CHECK: call i8* @llvm.localrecover
; CHECK: call void @"\01??1Obj@@QEAA@XZ"
; CHECK: invoke void @llvm.donothing()
; CHECK: to label %[[SPLIT_LABEL:.+]] unwind label %[[LPAD_LABEL:.+]]
;
; CHECK: [[SPLIT_LABEL]]
;
; CHECK: [[LPAD_LABEL]]
; CHECK: landingpad { i8*, i32 }
; CHECK: cleanup
; CHECK: unreachable
; CHECK: }
declare void @_CxxThrowException(i8*, %eh.ThrowInfo*)
declare i32 @__CxxFrameHandler3(...)
; Function Attrs: nounwind
declare void @"\01??1Obj@@QEAA@XZ"(%class.Obj*) #1
; Function Attrs: nounwind
declare void @llvm.eh.begincatch(i8* nocapture, i8* nocapture) #2
; Function Attrs: nounwind
declare void @llvm.eh.endcatch() #2
attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { nounwind }
attributes #3 = { noreturn }
!llvm.module.flags = !{!0}
!llvm.ident = !{!1}
!0 = !{i32 1, !"PIC Level", i32 2}
!1 = !{!"clang version 3.7.0 (trunk 235214) (llvm/trunk 235213)"}
|
