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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
;RUN: opt -passes=newgvn -S < %s | FileCheck %s
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.12.0"
;; Ensure we don't infinite loop when all phi arguments are really unreachable or self-defined
define void @fn1(i64 noundef %arg) {
; CHECK-LABEL: @fn1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 undef, label [[IF_THEN:%.*]], label [[COND_TRUE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: br i1 false, label [[FIRSTPHIBLOCK:%.*]], label [[TEMP:%.*]]
; CHECK: firstphiblock:
; CHECK-NEXT: br i1 undef, label %for.cond17thread-pre-split, label [[SECONDPHIBLOCK:%.*]]
; CHECK: secondphiblock:
; CHECK-NEXT: [[SECONDPHI:%.*]] = phi i64 [ [[THIRDPHI:%.*]], [[THIRDPHIBLOCK:%.*]] ], [ undef, [[FIRSTPHIBLOCK]] ]
; CHECK-NEXT: br i1 undef, label [[FIRSTPHIBLOCK]], label [[THIRDPHIBLOCK]]
; CHECK: thirdphiblock:
; CHECK-NEXT: [[THIRDPHI]] = phi i64 [ [[SECONDPHI]], [[SECONDPHIBLOCK]] ], [ [[DIV:%.*]], [[COND_TRUE]] ]
; CHECK-NEXT: br label [[SECONDPHIBLOCK]]
; CHECK: for.cond17thread-pre-split:
; CHECK-NEXT: br label [[COND_TRUE]]
; CHECK: cond.true:
; CHECK-NEXT: [[DIV]] = sdiv i64 [[ARG:%.*]], 4
; CHECK-NEXT: br label [[THIRDPHIBLOCK]]
; CHECK: temp:
; CHECK-NEXT: ret void
;
entry:
br i1 undef, label %if.then, label %cond.true
if.then:
br i1 false, label %firstphiblock, label %temp
firstphiblock:
%firstphi = phi i64 [ %arg, %if.then ], [ undef, %secondphiblock ]
br i1 undef, label %for.cond17thread-pre-split, label %secondphiblock
secondphiblock:
%secondphi = phi i64 [ %thirdphi, %thirdphiblock ], [ %firstphi, %firstphiblock ]
br i1 undef, label %firstphiblock, label %thirdphiblock
thirdphiblock:
%thirdphi = phi i64 [ %secondphi, %secondphiblock ], [ %div, %cond.true ]
br label %secondphiblock
for.cond17thread-pre-split:
br label %cond.true
cond.true:
%fourthphi = phi i64 [ %arg, %entry ], [ %firstphi, %for.cond17thread-pre-split ]
%div = sdiv i64 %fourthphi, 4
br label %thirdphiblock
temp:
ret void
}
define void @fn2(i64 noundef %arg) {
; CHECK-LABEL: @fn2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 undef, label [[IF_THEN:%.*]], label [[COND_TRUE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: br i1 false, label [[FIRSTPHIBLOCK:%.*]], label [[TEMP:%.*]]
; CHECK: firstphiblock:
; CHECK-NEXT: [[FIRSTPHI:%.*]] = phi i64 [ poison, [[IF_THEN]] ], [ [[SECONDPHI:%.*]], [[SECONDPHIBLOCK:%.*]] ]
; CHECK-NEXT: br i1 undef, label %for.cond17thread-pre-split, label [[SECONDPHIBLOCK]]
; CHECK: secondphiblock:
; CHECK-NEXT: [[SECONDPHI]] = phi i64 [ [[THIRDPHI:%.*]], [[THIRDPHIBLOCK:%.*]] ], [ [[FIRSTPHI]], [[FIRSTPHIBLOCK]] ]
; CHECK-NEXT: br i1 undef, label [[FIRSTPHIBLOCK]], label [[THIRDPHIBLOCK]]
; CHECK: thirdphiblock:
; CHECK-NEXT: [[THIRDPHI]] = phi i64 [ [[SECONDPHI]], [[SECONDPHIBLOCK]] ], [ [[DIV:%.*]], [[COND_TRUE]] ]
; CHECK-NEXT: br label [[SECONDPHIBLOCK]]
; CHECK: for.cond17thread-pre-split:
; CHECK-NEXT: br label [[COND_TRUE]]
; CHECK: cond.true:
; CHECK-NEXT: [[FOURTHPHI:%.*]] = phi i64 [ [[ARG:%.*]], [[ENTRY:%.*]] ], [ [[FIRSTPHI]], %for.cond17thread-pre-split ]
; CHECK-NEXT: [[DIV]] = sdiv i64 [[FOURTHPHI]], 4
; CHECK-NEXT: br label [[THIRDPHIBLOCK]]
; CHECK: temp:
; CHECK-NEXT: ret void
;
entry:
br i1 undef, label %if.then, label %cond.true
if.then:
br i1 false, label %firstphiblock, label %temp
firstphiblock:
%firstphi = phi i64 [ %arg, %if.then ], [ %secondphi, %secondphiblock ]
br i1 undef, label %for.cond17thread-pre-split, label %secondphiblock
secondphiblock:
%secondphi = phi i64 [ %thirdphi, %thirdphiblock ], [ %firstphi, %firstphiblock ]
br i1 undef, label %firstphiblock, label %thirdphiblock
thirdphiblock:
%thirdphi = phi i64 [ %secondphi, %secondphiblock ], [ %div, %cond.true ]
br label %secondphiblock
for.cond17thread-pre-split:
br label %cond.true
cond.true:
%fourthphi = phi i64 [ %arg, %entry ], [ %firstphi, %for.cond17thread-pre-split ]
%div = sdiv i64 %fourthphi, 4
br label %thirdphiblock
temp:
ret void
}
@b = external global i32, align 4
@a = external global i32, align 4
define void @fn3() {
; CHECK-LABEL: @fn3(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[L1:%.*]]
; CHECK: l1.loopexit:
; CHECK-NEXT: br label [[L1]]
; CHECK: l1:
; CHECK-NEXT: [[F_0:%.*]] = phi i32* [ @b, [[ENTRY:%.*]] ], [ @a, [[L1_LOOPEXIT:%.*]] ]
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond.loopexit:
; CHECK-NEXT: store i8 poison, i8* null
; CHECK-NEXT: br label [[FOR_COND]]
; CHECK: for.cond:
; CHECK-NEXT: br i1 undef, label [[FOR_END14:%.*]], label [[FOR_COND1_PREHEADER:%.*]]
; CHECK: for.cond1.preheader:
; CHECK-NEXT: br label [[FOR_BODY3:%.*]]
; CHECK: for.cond1:
; CHECK-NEXT: br label [[L2:%.*]]
; CHECK: for.body3:
; CHECK-NEXT: br i1 undef, label [[FOR_COND1:%.*]], label [[L1_LOOPEXIT]]
; CHECK: l2:
; CHECK-NEXT: [[G_4:%.*]] = phi i32* [ @b, [[FOR_END14]] ], [ @a, [[FOR_COND1]] ]
; CHECK-NEXT: [[F_2:%.*]] = phi i32* [ [[F_0]], [[FOR_END14]] ], [ @a, [[FOR_COND1]] ]
; CHECK-NEXT: br label [[FOR_INC:%.*]]
; CHECK: for.inc:
; CHECK-NEXT: br i1 false, label [[FOR_COND_LOOPEXIT:%.*]], label [[FOR_INC]]
; CHECK: for.end14:
; CHECK-NEXT: br label [[L2]]
;
entry:
br label %l1
l1.loopexit:
%g.223.lcssa = phi i32* [ @b, %for.body3 ]
br label %l1
l1:
%g.0 = phi i32* [ undef, %entry ], [ %g.223.lcssa, %l1.loopexit ]
%f.0 = phi i32* [ @b, %entry ], [ @a, %l1.loopexit ]
br label %for.cond
for.cond.loopexit:
br label %for.cond
for.cond:
%g.1 = phi i32* [ %g.0, %l1 ], [ %g.4, %for.cond.loopexit ]
%f.1 = phi i32* [ %f.0, %l1 ], [ %f.2, %for.cond.loopexit ]
br i1 undef, label %for.end14, label %for.cond1.preheader
for.cond1.preheader:
br label %for.body3
for.cond1:
br label %l2
for.body3:
br i1 undef, label %for.cond1, label %l1.loopexit
l2:
%g.4 = phi i32* [ %g.1, %for.end14 ], [ @a, %for.cond1 ]
%f.2 = phi i32* [ %f.1, %for.end14 ], [ @a, %for.cond1 ]
br label %for.inc
for.inc:
br i1 false, label %for.cond.loopexit, label %for.inc
for.end14:
br label %l2
}
|
