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1; RUN: llc < %s | FileCheck %s
2
3; Started from this code:
4; void f() {
5;   try {
6;     try {
7;       throw 42;
8;     } catch (int) {
9;     }
10;     try {
11;       throw 42;
12;     } catch (int) {
13;     }
14;   } catch (int) {
15;   }
16; }
17
18; Don't tail merge the calls.
19; CHECK: calll __CxxThrowException@8
20; CHECK: calll __CxxThrowException@8
21
22; ModuleID = 'cppeh-pingpong.cpp'
23target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
24target triple = "i686-pc-windows-msvc"
25
26%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
27%eh.CatchableType = type { i32, i8*, i32, i32, i32, i32, i8* }
28%eh.CatchableTypeArray.1 = type { i32, [1 x %eh.CatchableType*] }
29%eh.ThrowInfo = type { i32, i8*, i8*, i8* }
30
31$"\01??_R0H@8" = comdat any
32
33$"_CT??_R0H@84" = comdat any
34
35$_CTA1H = comdat any
36
37$_TI1H = comdat any
38
39@"\01??_7type_info@@6B@" = external constant i8*
40@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
41@"_CT??_R0H@84" = linkonce_odr unnamed_addr constant %eh.CatchableType { i32 1, i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*), i32 0, i32 -1, i32 0, i32 4, i8* null }, section ".xdata", comdat
42@_CTA1H = linkonce_odr unnamed_addr constant %eh.CatchableTypeArray.1 { i32 1, [1 x %eh.CatchableType*] [%eh.CatchableType* @"_CT??_R0H@84"] }, section ".xdata", comdat
43@_TI1H = linkonce_odr unnamed_addr constant %eh.ThrowInfo { i32 0, i8* null, i8* null, i8* bitcast (%eh.CatchableTypeArray.1* @_CTA1H to i8*) }, section ".xdata", comdat
44
45define void @"\01?f@@YAXXZ"() #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
46entry:
47  %i = alloca i32, align 4
48  %tmp = alloca i32, align 4
49  %tmp1 = alloca i32, align 4
50  store i32 0, i32* %i, align 4
51  store i32 42, i32* %tmp, align 4
52  %0 = bitcast i32* %tmp to i8*
53  invoke void @_CxxThrowException(i8* %0, %eh.ThrowInfo* @_TI1H) #1
54          to label %unreachable unwind label %catch.dispatch
55
56catch.dispatch:                                   ; preds = %entry
57  %cs1 = catchswitch within none [label %catch] unwind label %catch.dispatch.7
58
59catch:                                            ; preds = %catch.dispatch
60  %1 = catchpad within %cs1 [%rtti.TypeDescriptor2* @"\01??_R0H@8", i32 0, i8* null]
61  catchret from %1 to label %catchret.dest
62
63catchret.dest:                                    ; preds = %catch
64  br label %try.cont
65
66try.cont:                                         ; preds = %catchret.dest
67  store i32 42, i32* %tmp1, align 4
68  %2 = bitcast i32* %tmp1 to i8*
69  invoke void @_CxxThrowException(i8* %2, %eh.ThrowInfo* @_TI1H) #1
70          to label %unreachable unwind label %catch.dispatch.2
71
72catch.dispatch.2:                                 ; preds = %try.cont
73  %cs2 = catchswitch within none [label %catch.4] unwind label %catch.dispatch.7
74
75catch.4:                                          ; preds = %catch.dispatch.2
76  %3 = catchpad within %cs2 [%rtti.TypeDescriptor2* @"\01??_R0H@8", i32 0, i8* null]
77  catchret from %3 to label %catchret.dest.5
78
79catchret.dest.5:                                  ; preds = %catch.4
80  br label %try.cont.6
81
82try.cont.6:                                       ; preds = %catchret.dest.5
83  br label %try.cont.11
84
85catch.dispatch.7:
86  %cs3 = catchswitch within none [label %catch.9] unwind to caller
87
88catch.9:                                          ; preds = %catch.dispatch.7
89  %4 = catchpad within %cs3 [%rtti.TypeDescriptor2* @"\01??_R0H@8", i32 0, i8* null]
90  catchret from %4 to label %catchret.dest.10
91
92catchret.dest.10:                                 ; preds = %catch.9
93  br label %try.cont.11
94
95try.cont.11:                                      ; preds = %catchret.dest.10, %try.cont.6
96  ret void
97
98unreachable:                                      ; preds = %try.cont, %entry
99  unreachable
100}
101
102declare x86_stdcallcc void @_CxxThrowException(i8*, %eh.ThrowInfo*)
103
104declare i32 @__CxxFrameHandler3(...)
105
106attributes #0 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
107attributes #1 = { noreturn }
108