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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=instcombine < %s | FileCheck %s
; The pattern:
; add(add A, 1), (sext(icmp ne A, 0))
; is transformed into:
; umax(A, 1)
define i32 @add_sext_icmp(i32 %A) {
; CHECK-LABEL: define i32 @add_sext_icmp(
; CHECK-SAME: i32 [[A:%.*]]) {
; CHECK-NEXT: [[ADD2:%.*]] = call i32 @llvm.umax.i32(i32 [[A]], i32 1)
; CHECK-NEXT: ret i32 [[ADD2]]
;
%add1 = add i32 %A, 1
%icmp = icmp ne i32 %A, 0
%sext = sext i1 %icmp to i32
%add2 = add i32 %add1, %sext
ret i32 %add2
}
define i32 @add_sext_icmp_commutative(i32 %A) {
; CHECK-LABEL: define i32 @add_sext_icmp_commutative(
; CHECK-SAME: i32 [[A:%.*]]) {
; CHECK-NEXT: [[ADD2:%.*]] = call i32 @llvm.umax.i32(i32 [[A]], i32 1)
; CHECK-NEXT: ret i32 [[ADD2]]
;
%add1 = add i32 %A, 1
%icmp = icmp ne i32 %A, 0
%sext = sext i1 %icmp to i32
%add2 = add i32 %sext, %add1
ret i32 %add2
}
; Negative test
define i32 @add_sext_icmp_negative_constant(i32 %A) {
; CHECK-LABEL: define i32 @add_sext_icmp_negative_constant(
; CHECK-SAME: i32 [[A:%.*]]) {
; CHECK-NEXT: [[ADD1:%.*]] = add i32 [[A]], 2
; CHECK-NEXT: [[ICMP:%.*]] = icmp ne i32 [[A]], 0
; CHECK-NEXT: [[SEXT:%.*]] = sext i1 [[ICMP]] to i32
; CHECK-NEXT: [[ADD2:%.*]] = add i32 [[ADD1]], [[SEXT]]
; CHECK-NEXT: ret i32 [[ADD2]]
;
%add1 = add i32 %A, 2
%icmp = icmp ne i32 %A, 0
%sext = sext i1 %icmp to i32
%add2 = add i32 %add1, %sext
ret i32 %add2
}
define i32 @add_sext_icmp_negative_pred(i32 %A) {
; CHECK-LABEL: define i32 @add_sext_icmp_negative_pred(
; CHECK-SAME: i32 [[A:%.*]]) {
; CHECK-NEXT: [[ADD1:%.*]] = add i32 [[A]], 1
; CHECK-NEXT: [[ICMP:%.*]] = icmp eq i32 [[A]], 0
; CHECK-NEXT: [[SEXT:%.*]] = sext i1 [[ICMP]] to i32
; CHECK-NEXT: [[ADD2:%.*]] = add i32 [[ADD1]], [[SEXT]]
; CHECK-NEXT: ret i32 [[ADD2]]
;
%add1 = add i32 %A, 1
%icmp = icmp eq i32 %A, 0
%sext = sext i1 %icmp to i32
%add2 = add i32 %add1, %sext
ret i32 %add2
}
; multi-use test
define i32 @add_sext_icmp_multi_use_add2(i32 %A) {
; CHECK-LABEL: define i32 @add_sext_icmp_multi_use_add2(
; CHECK-SAME: i32 [[A:%.*]]) {
; CHECK-NEXT: [[ADD2:%.*]] = call i32 @llvm.umax.i32(i32 [[A]], i32 1)
; CHECK-NEXT: call void @use(i32 [[ADD2]])
; CHECK-NEXT: ret i32 [[ADD2]]
;
%add1 = add i32 %A, 1
%icmp = icmp ne i32 %A, 0
%sext = sext i1 %icmp to i32
%add2 = add i32 %add1, %sext
call void @use(i32 %add2)
ret i32 %add2
}
define i32 @add_sext_icmp_multi_use_sext(i32 %A) {
; CHECK-LABEL: define i32 @add_sext_icmp_multi_use_sext(
; CHECK-SAME: i32 [[A:%.*]]) {
; CHECK-NEXT: [[ADD1:%.*]] = add i32 [[A]], 1
; CHECK-NEXT: [[ICMP:%.*]] = icmp ne i32 [[A]], 0
; CHECK-NEXT: [[SEXT:%.*]] = sext i1 [[ICMP]] to i32
; CHECK-NEXT: call void @use(i32 [[SEXT]])
; CHECK-NEXT: [[ADD2:%.*]] = add i32 [[ADD1]], [[SEXT]]
; CHECK-NEXT: ret i32 [[ADD2]]
;
%add1 = add i32 %A, 1
%icmp = icmp ne i32 %A, 0
%sext = sext i1 %icmp to i32
call void @use(i32 %sext)
%add2 = add i32 %add1, %sext
ret i32 %add2
}
define i32 @add_sext_icmp_multi_use_icmp(i32 %A) {
; CHECK-LABEL: define i32 @add_sext_icmp_multi_use_icmp(
; CHECK-SAME: i32 [[A:%.*]]) {
; CHECK-NEXT: [[ADD1:%.*]] = add i32 [[A]], 1
; CHECK-NEXT: [[ICMP:%.*]] = icmp ne i32 [[A]], 0
; CHECK-NEXT: call void @use(i1 [[ICMP]])
; CHECK-NEXT: [[SEXT:%.*]] = sext i1 [[ICMP]] to i32
; CHECK-NEXT: [[ADD2:%.*]] = add i32 [[ADD1]], [[SEXT]]
; CHECK-NEXT: ret i32 [[ADD2]]
;
%add1 = add i32 %A, 1
%icmp = icmp ne i32 %A, 0
call void @use(i1 %icmp)
%sext = sext i1 %icmp to i32
%add2 = add i32 %add1, %sext
ret i32 %add2
}
define i32 @add_sext_icmp_multi_use_add1(i32 %A) {
; CHECK-LABEL: define i32 @add_sext_icmp_multi_use_add1(
; CHECK-SAME: i32 [[A:%.*]]) {
; CHECK-NEXT: [[ADD1:%.*]] = add i32 [[A]], 1
; CHECK-NEXT: call void @use(i32 [[ADD1]])
; CHECK-NEXT: [[ADD2:%.*]] = call i32 @llvm.umax.i32(i32 [[A]], i32 1)
; CHECK-NEXT: ret i32 [[ADD2]]
;
%add1 = add i32 %A, 1
call void @use(i32 %add1)
%icmp = icmp ne i32 %A, 0
%sext = sext i1 %icmp to i32
%add2 = add i32 %add1, %sext
ret i32 %add2
}
declare void @use(i32)
|
