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1; RUN: opt < %s -simplifycfg -S | FileCheck %s
2target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
3
4declare i32 @__gxx_personality_v0(...)
5declare void @__cxa_call_unexpected(i8*)
6declare void @purefn() nounwind readnone
7declare i32 @read_only() nounwind readonly
8declare i32 @nounwind_fn() nounwind
9declare i32 @fn()
10
11
12; CHECK-LABEL: @f1(
13define i8* @f1() nounwind uwtable ssp personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
14entry:
15; CHECK: call void @llvm.trap()
16; CHECK: unreachable
17  %call = invoke noalias i8* undef()
18          to label %invoke.cont unwind label %lpad
19
20invoke.cont:
21  ret i8* %call
22
23lpad:
24  %0 = landingpad { i8*, i32 }
25          filter [0 x i8*] zeroinitializer
26  %1 = extractvalue { i8*, i32 } %0, 0
27  tail call void @__cxa_call_unexpected(i8* %1) noreturn nounwind
28  unreachable
29}
30
31; CHECK-LABEL: @f2(
32define i8* @f2() nounwind uwtable ssp personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
33entry:
34; CHECK: call void @llvm.trap()
35; CHECK: unreachable
36  %call = invoke noalias i8* null()
37          to label %invoke.cont unwind label %lpad
38
39invoke.cont:
40  ret i8* %call
41
42lpad:
43  %0 = landingpad { i8*, i32 }
44          filter [0 x i8*] zeroinitializer
45  %1 = extractvalue { i8*, i32 } %0, 0
46  tail call void @__cxa_call_unexpected(i8* %1) noreturn nounwind
47  unreachable
48}
49
50; CHECK-LABEL: @f3(
51define i32 @f3() nounwind uwtable ssp personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
52; CHECK-NEXT: entry
53entry:
54; CHECK-NEXT: ret i32 3
55  %call = invoke i32 @read_only()
56          to label %invoke.cont unwind label %lpad
57
58invoke.cont:
59  ret i32 3
60
61lpad:
62  %0 = landingpad { i8*, i32 }
63          filter [0 x i8*] zeroinitializer
64  %1 = extractvalue { i8*, i32 } %0, 0
65  tail call void @__cxa_call_unexpected(i8* %1) noreturn nounwind
66  unreachable
67}
68
69; CHECK-LABEL: @f4(
70define i32 @f4() nounwind uwtable ssp personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
71; CHECK-NEXT: entry
72entry:
73; CHECK-NEXT: call i32 @read_only()
74  %call = invoke i32 @read_only()
75          to label %invoke.cont unwind label %lpad
76
77invoke.cont:
78; CHECK-NEXT: ret i32 %call
79  ret i32 %call
80
81lpad:
82  %0 = landingpad { i8*, i32 }
83          filter [0 x i8*] zeroinitializer
84  %1 = extractvalue { i8*, i32 } %0, 0
85  tail call void @__cxa_call_unexpected(i8* %1) noreturn nounwind
86  unreachable
87}
88
89; CHECK-LABEL: @f5(
90define i32 @f5(i1 %cond, i8* %a, i8* %b) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
91entry:
92  br i1 %cond, label %x, label %y
93
94x:
95; CHECK: invoke i32 @fn()
96  %call = invoke i32 @fn()
97          to label %cont unwind label %lpad
98
99y:
100; CHECK: call i32 @nounwind_fn()
101  %call2 = invoke i32 @nounwind_fn()
102           to label %cont unwind label %lpad
103
104cont:
105; CHECK: phi i32
106; CHECK: ret i32 %phi
107  %phi = phi i32 [%call, %x], [%call2, %y]
108  ret i32 %phi
109
110lpad:
111; CHECK-NOT: phi
112  %phi2 = phi i8* [%a, %x], [%b, %y]
113  %0 = landingpad { i8*, i32 }
114          filter [0 x i8*] zeroinitializer
115; CHECK: __cxa_call_unexpected(i8* %a)
116  tail call void @__cxa_call_unexpected(i8* %phi2) noreturn nounwind
117  unreachable
118}
119
120; CHECK-LABEL: @f6(
121define void @f6() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
122entry:
123  invoke void @purefn()
124          to label %invoke.cont1 unwind label %lpad
125
126invoke.cont1:
127  %foo = invoke i32 @fn()
128          to label %invoke.cont2 unwind label %lpad
129
130invoke.cont2:
131  ret void
132
133lpad:
134; CHECK-NOT: phi
135  %tmp = phi i8* [ null, %invoke.cont1 ], [ null, %entry ]
136  landingpad { i8*, i32 }
137          cleanup
138  ret void
139}
140