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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu | FileCheck %s
@var32 = global i32 0
@var64 = global i64 0
define void @test_csel(i32 %lhs32, i32 %rhs32, i64 %lhs64) {
; CHECK-LABEL: test_csel:
%tst1 = icmp ugt i32 %lhs32, %rhs32
%val1 = select i1 %tst1, i32 42, i32 52
store i32 %val1, i32* @var32
; CHECK-DAG: movz [[W52:w[0-9]+]], #52
; CHECK-DAG: movz [[W42:w[0-9]+]], #42
; CHECK: csel {{w[0-9]+}}, [[W42]], [[W52]], hi
%rhs64 = sext i32 %rhs32 to i64
%tst2 = icmp sle i64 %lhs64, %rhs64
%val2 = select i1 %tst2, i64 %lhs64, i64 %rhs64
store i64 %val2, i64* @var64
; CHECK-DAG: cmp [[LHS:x[0-9]+]], [[RHS:w[0-9]+]], sxtw
; CHECK-DAG: sxtw [[EXT_RHS:x[0-9]+]], [[RHS]]
; CHECK: csel {{x[0-9]+}}, [[LHS]], [[EXT_RHS]], le
ret void
; CHECK: ret
}
define void @test_floatcsel(float %lhs32, float %rhs32, double %lhs64, double %rhs64) {
; CHECK-LABEL: test_floatcsel:
%tst1 = fcmp one float %lhs32, %rhs32
; CHECK: fcmp {{s[0-9]+}}, {{s[0-9]+}}
%val1 = select i1 %tst1, i32 42, i32 52
store i32 %val1, i32* @var32
; CHECK: movz [[W52:w[0-9]+]], #52
; CHECK: movz [[W42:w[0-9]+]], #42
; CHECK: csel [[MAYBETRUE:w[0-9]+]], [[W42]], [[W52]], mi
; CHECK: csel {{w[0-9]+}}, [[W42]], [[MAYBETRUE]], gt
%tst2 = fcmp ueq double %lhs64, %rhs64
; CHECK: fcmp {{d[0-9]+}}, {{d[0-9]+}}
%val2 = select i1 %tst2, i64 9, i64 15
store i64 %val2, i64* @var64
; CHECK: movz [[CONST15:x[0-9]+]], #15
; CHECK: movz [[CONST9:x[0-9]+]], #9
; CHECK: csel [[MAYBETRUE:x[0-9]+]], [[CONST9]], [[CONST15]], eq
; CHECK: csel {{x[0-9]+}}, [[CONST9]], [[MAYBETRUE]], vs
ret void
; CHECK: ret
}
define void @test_csinc(i32 %lhs32, i32 %rhs32, i64 %lhs64) {
; CHECK-LABEL: test_csinc:
; Note that commuting rhs and lhs in the select changes ugt to ule (i.e. hi to ls).
%tst1 = icmp ugt i32 %lhs32, %rhs32
%inc1 = add i32 %rhs32, 1
%val1 = select i1 %tst1, i32 %inc1, i32 %lhs32
store volatile i32 %val1, i32* @var32
; CHECK: cmp [[LHS:w[0-9]+]], [[RHS:w[0-9]+]]
; CHECK: csinc {{w[0-9]+}}, [[LHS]], [[RHS]], ls
%rhs2 = add i32 %rhs32, 42
%tst2 = icmp sle i32 %lhs32, %rhs2
%inc2 = add i32 %rhs32, 1
%val2 = select i1 %tst2, i32 %lhs32, i32 %inc2
store volatile i32 %val2, i32* @var32
; CHECK: cmp [[LHS:w[0-9]+]], {{w[0-9]+}}
; CHECK: csinc {{w[0-9]+}}, [[LHS]], {{w[0-9]+}}, le
; Note that commuting rhs and lhs in the select changes ugt to ule (i.e. hi to ls).
%rhs3 = sext i32 %rhs32 to i64
%tst3 = icmp ugt i64 %lhs64, %rhs3
%inc3 = add i64 %rhs3, 1
%val3 = select i1 %tst3, i64 %inc3, i64 %lhs64
store volatile i64 %val3, i64* @var64
; CHECK: cmp [[LHS:x[0-9]+]], {{w[0-9]+}}
; CHECK: csinc {{x[0-9]+}}, [[LHS]], {{x[0-9]+}}, ls
%rhs4 = zext i32 %rhs32 to i64
%tst4 = icmp sle i64 %lhs64, %rhs4
%inc4 = add i64 %rhs4, 1
%val4 = select i1 %tst4, i64 %lhs64, i64 %inc4
store volatile i64 %val4, i64* @var64
; CHECK: cmp [[LHS:x[0-9]+]], {{w[0-9]+}}
; CHECK: csinc {{x[0-9]+}}, [[LHS]], {{x[0-9]+}}, le
ret void
; CHECK: ret
}
define void @test_csinv(i32 %lhs32, i32 %rhs32, i64 %lhs64) {
; CHECK-LABEL: test_csinv:
; Note that commuting rhs and lhs in the select changes ugt to ule (i.e. hi to ls).
%tst1 = icmp ugt i32 %lhs32, %rhs32
%inc1 = xor i32 -1, %rhs32
%val1 = select i1 %tst1, i32 %inc1, i32 %lhs32
store volatile i32 %val1, i32* @var32
; CHECK: cmp [[LHS:w[0-9]+]], [[RHS:w[0-9]+]]
; CHECK: csinv {{w[0-9]+}}, [[LHS]], [[RHS]], ls
%rhs2 = add i32 %rhs32, 42
%tst2 = icmp sle i32 %lhs32, %rhs2
%inc2 = xor i32 -1, %rhs32
%val2 = select i1 %tst2, i32 %lhs32, i32 %inc2
store volatile i32 %val2, i32* @var32
; CHECK: cmp [[LHS:w[0-9]+]], {{w[0-9]+}}
; CHECK: csinv {{w[0-9]+}}, [[LHS]], {{w[0-9]+}}, le
; Note that commuting rhs and lhs in the select changes ugt to ule (i.e. hi to ls).
%rhs3 = sext i32 %rhs32 to i64
%tst3 = icmp ugt i64 %lhs64, %rhs3
%inc3 = xor i64 -1, %rhs3
%val3 = select i1 %tst3, i64 %inc3, i64 %lhs64
store volatile i64 %val3, i64* @var64
; CHECK: cmp [[LHS:x[0-9]+]], {{w[0-9]+}}
; CHECK: csinv {{x[0-9]+}}, [[LHS]], {{x[0-9]+}}, ls
%rhs4 = zext i32 %rhs32 to i64
%tst4 = icmp sle i64 %lhs64, %rhs4
%inc4 = xor i64 -1, %rhs4
%val4 = select i1 %tst4, i64 %lhs64, i64 %inc4
store volatile i64 %val4, i64* @var64
; CHECK: cmp [[LHS:x[0-9]+]], {{w[0-9]+}}
; CHECK: csinv {{x[0-9]+}}, [[LHS]], {{x[0-9]+}}, le
ret void
; CHECK: ret
}
define void @test_csneg(i32 %lhs32, i32 %rhs32, i64 %lhs64) {
; CHECK-LABEL: test_csneg:
; Note that commuting rhs and lhs in the select changes ugt to ule (i.e. hi to ls).
%tst1 = icmp ugt i32 %lhs32, %rhs32
%inc1 = sub i32 0, %rhs32
%val1 = select i1 %tst1, i32 %inc1, i32 %lhs32
store volatile i32 %val1, i32* @var32
; CHECK: cmp [[LHS:w[0-9]+]], [[RHS:w[0-9]+]]
; CHECK: csneg {{w[0-9]+}}, [[LHS]], [[RHS]], ls
%rhs2 = add i32 %rhs32, 42
%tst2 = icmp sle i32 %lhs32, %rhs2
%inc2 = sub i32 0, %rhs32
%val2 = select i1 %tst2, i32 %lhs32, i32 %inc2
store volatile i32 %val2, i32* @var32
; CHECK: cmp [[LHS:w[0-9]+]], {{w[0-9]+}}
; CHECK: csneg {{w[0-9]+}}, [[LHS]], {{w[0-9]+}}, le
; Note that commuting rhs and lhs in the select changes ugt to ule (i.e. hi to ls).
%rhs3 = sext i32 %rhs32 to i64
%tst3 = icmp ugt i64 %lhs64, %rhs3
%inc3 = sub i64 0, %rhs3
%val3 = select i1 %tst3, i64 %inc3, i64 %lhs64
store volatile i64 %val3, i64* @var64
; CHECK: cmp [[LHS:x[0-9]+]], {{w[0-9]+}}
; CHECK: csneg {{x[0-9]+}}, [[LHS]], {{x[0-9]+}}, ls
%rhs4 = zext i32 %rhs32 to i64
%tst4 = icmp sle i64 %lhs64, %rhs4
%inc4 = sub i64 0, %rhs4
%val4 = select i1 %tst4, i64 %lhs64, i64 %inc4
store volatile i64 %val4, i64* @var64
; CHECK: cmp [[LHS:x[0-9]+]], {{w[0-9]+}}
; CHECK: csneg {{x[0-9]+}}, [[LHS]], {{x[0-9]+}}, le
ret void
; CHECK: ret
}
define void @test_cset(i32 %lhs, i32 %rhs, i64 %lhs64) {
; CHECK-LABEL: test_cset:
; N.b. code is not optimal here (32-bit csinc would be better) but
; incoming DAG is too complex
%tst1 = icmp eq i32 %lhs, %rhs
%val1 = zext i1 %tst1 to i32
store i32 %val1, i32* @var32
; CHECK: cmp {{w[0-9]+}}, {{w[0-9]+}}
; CHECK: csinc {{w[0-9]+}}, wzr, wzr, ne
%rhs64 = sext i32 %rhs to i64
%tst2 = icmp ule i64 %lhs64, %rhs64
%val2 = zext i1 %tst2 to i64
store i64 %val2, i64* @var64
; CHECK: csinc {{w[0-9]+}}, wzr, wzr, hi
ret void
; CHECK: ret
}
define void @test_csetm(i32 %lhs, i32 %rhs, i64 %lhs64) {
; CHECK-LABEL: test_csetm:
%tst1 = icmp eq i32 %lhs, %rhs
%val1 = sext i1 %tst1 to i32
store i32 %val1, i32* @var32
; CHECK: cmp {{w[0-9]+}}, {{w[0-9]+}}
; CHECK: csinv {{w[0-9]+}}, wzr, wzr, ne
%rhs64 = sext i32 %rhs to i64
%tst2 = icmp ule i64 %lhs64, %rhs64
%val2 = sext i1 %tst2 to i64
store i64 %val2, i64* @var64
; CHECK: csinv {{x[0-9]+}}, xzr, xzr, hi
ret void
; CHECK: ret
}
|
