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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instsimplify -S | FileCheck %s
; PR12189
define i1 @test1(i32 %x) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: br i1 true, label [[A:%.*]], label [[B:%.*]]
; CHECK: a:
; CHECK-NEXT: [[AA:%.*]] = or i32 [[X:%.*]], 10
; CHECK-NEXT: br label [[C:%.*]]
; CHECK: b:
; CHECK-NEXT: [[BB:%.*]] = or i32 [[X]], 10
; CHECK-NEXT: br label [[C]]
; CHECK: c:
; CHECK-NEXT: [[CC:%.*]] = phi i32 [ [[BB]], [[B]] ], [ [[AA]], [[A]] ]
; CHECK-NEXT: [[D:%.*]] = urem i32 [[CC]], 2
; CHECK-NEXT: [[E:%.*]] = icmp eq i32 [[D]], 0
; CHECK-NEXT: ret i1 [[E]]
;
br i1 true, label %a, label %b
a:
%aa = or i32 %x, 10
br label %c
b:
%bb = or i32 %x, 10
br label %c
c:
%cc = phi i32 [ %bb, %b ], [%aa, %a ]
%d = urem i32 %cc, 2
%e = icmp eq i32 %d, 0
ret i1 %e
}
; D63489 - https://reviews.llvm.org/D63489
; If this single-value phi form needs to be preserved to enable
; further analysis, then -instsimplify should not be running?
define i32 @lcssa-phi(i32 %x) {
; CHECK-LABEL: @lcssa-phi(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[END:%.*]]
; CHECK: end:
; CHECK-NEXT: ret i32 [[X:%.*]]
;
entry:
br label %end
end:
%counter.lcssa = phi i32 [ %x, %entry ]
ret i32 %counter.lcssa
}
define i32 @poison(i1 %cond, i32 %v) {
; CHECK-LABEL: @poison(
; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
; CHECK: A:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: B:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: EXIT:
; CHECK-NEXT: ret i32 [[V:%.*]]
;
br i1 %cond, label %A, label %B
A:
br label %EXIT
B:
br label %EXIT
EXIT:
%w = phi i32 [%v, %A], [poison, %B]
ret i32 %w
}
define i32 @undef(i1 %cond, i32 %v) {
; CHECK-LABEL: @undef(
; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
; CHECK: A:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: B:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: EXIT:
; CHECK-NEXT: ret i32 [[V:%.*]]
;
br i1 %cond, label %A, label %B
A:
br label %EXIT
B:
br label %EXIT
EXIT:
%w = phi i32 [%v, %A], [undef, %B]
ret i32 %w
}
define i8 @undef_poison(i1 %cond) {
; CHECK-LABEL: @undef_poison(
; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
; CHECK: A:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: B:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: EXIT:
; CHECK-NEXT: ret i8 undef
;
br i1 %cond, label %A, label %B
A:
br label %EXIT
B:
br label %EXIT
EXIT:
%r = phi i8 [undef, %A], [poison, %B]
ret i8 %r
}
define i8 @only_undef(i1 %cond) {
; CHECK-LABEL: @only_undef(
; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
; CHECK: A:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: B:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: EXIT:
; CHECK-NEXT: ret i8 undef
;
br i1 %cond, label %A, label %B
A:
br label %EXIT
B:
br label %EXIT
EXIT:
%r = phi i8 [undef, %A], [undef, %B]
ret i8 %r
}
define i8 @only_poison(i1 %cond) {
; CHECK-LABEL: @only_poison(
; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
; CHECK: A:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: B:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: EXIT:
; CHECK-NEXT: ret i8 undef
;
br i1 %cond, label %A, label %B
A:
br label %EXIT
B:
br label %EXIT
EXIT:
%r = phi i8 [poison, %A], [poison, %B]
ret i8 %r
}
|
