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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
|
; RUN: opt --bpf-check-and-opt-ir -S -mtriple=bpf-pc-linux %s | FileCheck %s
; Test plan:
; @test1: x < umin(i64 a, i64 b)
; @test2: x < umax(i64 a, i64 b)
; @test3: x >= umin(i64 a, i64 b)
; @test4: x >= umax(i64 a, i64 b)
; @test5: umin(i64 a, i64 b) >= x
; @test6: x < smin(i64 a, i64 b)
; @test7: x < umin(i32 a, i32 b)
; @test8: x < zext i64 umin(i32 a, i32 b)
; @test9: x < sext i64 umin(i32 a, i32 b)
; @test10: check that umin belonging to the same loop is not touched
; @test11: check that nested loops are processed
define i32 @test1(i64 %a, i64 %b, i64 %x) {
entry:
%min = tail call i64 @llvm.umin.i64(i64 %a, i64 %b)
br label %loop
loop:
%cmp = icmp ult i64 %x, %min
br i1 %cmp, label %loop, label %ret
ret: ret i32 0
}
; CHECK: @test1
; CHECK-NEXT: entry:
; CHECK-NEXT: br label %loop
; CHECK-EMPTY:
; CHECK-NEXT: loop:
; CHECK-NEXT: %0 = icmp ult i64 %x, %a
; CHECK-NEXT: %1 = icmp ult i64 %x, %b
; CHECK-NEXT: %2 = select i1 %0, i1 %1, i1 false
; CHECK-NEXT: br i1 %2, label %loop, label %ret
define i32 @test2(i64 %a, i64 %b, i64 %x) {
entry:
%max = tail call i64 @llvm.umax.i64(i64 %a, i64 %b)
br label %loop
loop:
%cmp = icmp ult i64 %x, %max
br i1 %cmp, label %loop, label %ret
ret: ret i32 0
}
; CHECK: @test2
; CHECK-NEXT: entry:
; CHECK-NEXT: br label %loop
; CHECK-EMPTY:
; CHECK-NEXT: loop:
; CHECK-NEXT: %0 = icmp ult i64 %x, %a
; CHECK-NEXT: %1 = icmp ult i64 %x, %b
; CHECK-NEXT: %2 = select i1 %0, i1 true, i1 %1
; CHECK-NEXT: br i1 %2, label %loop, label %ret
define i32 @test3(i64 %a, i64 %b, i64 %x) {
entry:
%min = tail call i64 @llvm.umin.i64(i64 %a, i64 %b)
br label %loop
loop:
%cmp = icmp uge i64 %x, %min
br i1 %cmp, label %loop, label %ret
ret: ret i32 0
}
; CHECK: @test3
; CHECK-NEXT: entry:
; CHECK-NEXT: br label %loop
; CHECK-EMPTY:
; CHECK-NEXT: loop:
; CHECK-NEXT: %0 = icmp uge i64 %x, %a
; CHECK-NEXT: %1 = icmp uge i64 %x, %b
; CHECK-NEXT: %2 = select i1 %0, i1 true, i1 %1
; CHECK-NEXT: br i1 %2, label %loop, label %ret
define i32 @test4(i64 %a, i64 %b, i64 %x) {
entry:
%max = tail call i64 @llvm.umax.i64(i64 %a, i64 %b)
br label %loop
loop:
%cmp = icmp uge i64 %x, %max
br i1 %cmp, label %loop, label %ret
ret: ret i32 0
}
; CHECK: @test4
; CHECK-NEXT: entry:
; CHECK-NEXT: br label %loop
; CHECK-EMPTY:
; CHECK-NEXT: loop:
; CHECK-NEXT: %0 = icmp uge i64 %x, %a
; CHECK-NEXT: %1 = icmp uge i64 %x, %b
; CHECK-NEXT: %2 = select i1 %0, i1 %1, i1 false
; CHECK-NEXT: br i1 %2, label %loop, label %ret
define i32 @test5(i64 %a, i64 %b, i64 %x) {
entry:
%min = tail call i64 @llvm.umin.i64(i64 %a, i64 %b)
br label %loop
loop:
%cmp = icmp uge i64 %min, %x
br i1 %cmp, label %loop, label %ret
ret: ret i32 0
}
; CHECK: @test5
; CHECK-NEXT: entry:
; CHECK-NEXT: br label %loop
; CHECK-EMPTY:
; CHECK-NEXT: loop:
; CHECK: %0 = icmp ule i64 %x, %a
; CHECK-NEXT: %1 = icmp ule i64 %x, %b
; CHECK-NEXT: %2 = select i1 %0, i1 %1, i1 false
; CHECK-NEXT: br i1 %2, label %loop, label %ret
define i32 @test6(i64 %a, i64 %b, i64 %x) {
entry:
%min = tail call i64 @llvm.smin.i64(i64 %a, i64 %b)
br label %loop
loop:
%cmp = icmp slt i64 %x, %min
br i1 %cmp, label %loop, label %ret
ret: ret i32 0
}
; CHECK: @test6
; CHECK-NEXT: entry:
; CHECK-NEXT: br label %loop
; CHECK-EMPTY:
; CHECK-NEXT: loop:
; CHECK: %0 = icmp slt i64 %x, %a
; CHECK-NEXT: %1 = icmp slt i64 %x, %b
; CHECK-NEXT: %2 = select i1 %0, i1 %1, i1 false
; CHECK-NEXT: br i1 %2, label %loop, label %ret
define i32 @test7(i32 %a, i32 %b, i32 %x) {
entry:
%min = tail call i32 @llvm.umin.i32(i32 %a, i32 %b)
br label %loop
loop:
%cmp = icmp ult i32 %x, %min
br i1 %cmp, label %loop, label %ret
ret: ret i32 0
}
; CHECK: @test7
; CHECK-NEXT: entry:
; CHECK-NEXT: br label %loop
; CHECK-EMPTY:
; CHECK-NEXT: loop:
; CHECK: %0 = icmp ult i32 %x, %a
; CHECK-NEXT: %1 = icmp ult i32 %x, %b
; CHECK-NEXT: %2 = select i1 %0, i1 %1, i1 false
; CHECK-NEXT: br i1 %2, label %loop, label %ret
define i32 @test8(i32 %a, i32 %b, i64 %x) {
entry:
%min = tail call i32 @llvm.umin.i32(i32 %a, i32 %b)
br label %loop
loop:
%ext = zext i32 %min to i64
%cmp = icmp ult i64 %x, %ext
br i1 %cmp, label %loop, label %ret
ret: ret i32 0
}
; CHECK: @test8
; CHECK-NEXT: entry:
; CHECK-NEXT: br label %loop
; CHECK-EMPTY:
; CHECK-NEXT: loop:
; CHECK-NEXT: %0 = zext i32 %a to i64
; CHECK-NEXT: %1 = zext i32 %b to i64
; CHECK-NEXT: %2 = icmp ult i64 %x, %0
; CHECK-NEXT: %3 = icmp ult i64 %x, %1
; CHECK-NEXT: %4 = select i1 %2, i1 %3, i1 false
; CHECK-NEXT: br i1 %4, label %loop, label %ret
define i32 @test9(i32 %a, i32 %b, i64 %x) {
entry:
%min = tail call i32 @llvm.umin.i32(i32 %a, i32 %b)
br label %loop
loop:
%ext = sext i32 %min to i64
%cmp = icmp ult i64 %x, %ext
br i1 %cmp, label %loop, label %ret
ret: ret i32 0
}
; CHECK: @test9
; CHECK-NEXT: entry:
; CHECK-NEXT: br label %loop
; CHECK-EMPTY:
; CHECK-NEXT: loop:
; CHECK-NEXT: %0 = sext i32 %a to i64
; CHECK-NEXT: %1 = sext i32 %b to i64
; CHECK-NEXT: %2 = icmp ult i64 %x, %0
; CHECK-NEXT: %3 = icmp ult i64 %x, %1
; CHECK-NEXT: %4 = select i1 %2, i1 %3, i1 false
; CHECK-NEXT: br i1 %4, label %loop, label %ret
; umin within the loop body is unchanged
define i32 @test10(i64 %a, i64 %b, i64 %x) {
entry:
br label %loop
loop:
%min = tail call i64 @llvm.umin.i64(i64 %a, i64 %b)
%cmp = icmp ult i64 %x, %min
br i1 %cmp, label %loop, label %ret
ret: ret i32 0
}
; CHECK: @test10
; CHECK-NEXT: entry:
; CHECK-NEXT: br label %loop
; CHECK-EMPTY:
; CHECK-NEXT: loop:
; CHECK-NEXT: %min = tail call i64 @llvm.umin.i64(i64 %a, i64 %b)
; CHECK-NEXT: %cmp = icmp ult i64 %x, %min
; CHECK-NEXT: br i1 %cmp, label %loop, label %ret
; umin from outer loop body is processed
define i32 @test11(i64 %a, i64 %b, i64 %x) {
entry:
br label %loop
loop:
%min = tail call i64 @llvm.umin.i64(i64 %a, i64 %b)
br label %nested.loop
nested.loop:
%cmp = icmp ult i64 %x, %min
br i1 %cmp, label %nested.loop, label %loop
ret: ret i32 0
}
; CHECK: @test11
; CHECK-NEXT: entry:
; CHECK-NEXT: br label %loop
; CHECK-EMPTY:
; CHECK-NEXT: loop:
; CHECK-NEXT: br label %nested.loop
; CHECK-EMPTY:
; CHECK-NEXT: nested.loop:
; CHECK-NEXT: %0 = icmp ult i64 %x, %a
; CHECK-NEXT: %1 = icmp ult i64 %x, %b
; CHECK-NEXT: %2 = select i1 %0, i1 %1, i1 false
; CHECK-NEXT: br i1 %2, label %nested.loop, label %loop
declare i64 @llvm.umin.i64(i64, i64)
declare i64 @llvm.smin.i64(i64, i64)
declare i64 @llvm.umax.i64(i64, i64)
declare i64 @llvm.smax.i64(i64, i64)
declare i32 @llvm.umin.i32(i32, i32)
declare i32 @llvm.smin.i32(i32, i32)
declare i32 @llvm.umax.i32(i32, i32)
declare i32 @llvm.smax.i32(i32, i32)
|
