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
|
; RUN: opt -passes=loop-vectorize -force-vector-width=4 -force-vector-interleave=1 -S < %s | FileCheck %s --check-prefix=CHECK
; RUN: opt -passes=loop-vectorize -force-vector-width=4 -force-vector-interleave=4 -S < %s | FileCheck %s --check-prefix=CHECK
; RUN: opt -passes=loop-vectorize -force-vector-width=1 -force-vector-interleave=4 -S < %s | FileCheck %s --check-prefix=CHECK
define i64 @smax_idx(ptr nocapture readonly %a, i64 %mm, i64 %ii, ptr nocapture writeonly %res_max, i64 %n) {
; CHECK-LABEL: @smax_idx(
; CHECK-NOT: vector.body:
;
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%max.09 = phi i64 [ %mm, %entry ], [ %1, %for.body ]
%idx.011 = phi i64 [ %ii, %entry ], [ %spec.select7, %for.body ]
%arrayidx = getelementptr inbounds i64, ptr %a, i64 %indvars.iv
%0 = load i64, ptr %arrayidx
%1 = tail call i64 @llvm.smax.i64(i64 %max.09, i64 %0)
%cmp1 = icmp slt i64 %max.09, %0
%spec.select7 = select i1 %cmp1, i64 %indvars.iv, i64 %idx.011
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond.not = icmp eq i64 %indvars.iv.next, %n
br i1 %exitcond.not, label %exit, label %for.body
exit:
store i64 %1, ptr %res_max
ret i64 %spec.select7
}
;
; Check the different order of reduction phis.
;
define i64 @smax_idx_inverted_phi(ptr nocapture readonly %a, i64 %mm, i64 %ii, ptr nocapture writeonly %res_max, i64 %n) {
; CHECK-LABEL: @smax_idx_inverted_phi(
; CHECK-NOT: vector.body:
;
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%idx.011 = phi i64 [ %ii, %entry ], [ %spec.select7, %for.body ]
%max.09 = phi i64 [ %mm, %entry ], [ %1, %for.body ]
%arrayidx = getelementptr inbounds i64, ptr %a, i64 %indvars.iv
%0 = load i64, ptr %arrayidx
%1 = tail call i64 @llvm.smax.i64(i64 %max.09, i64 %0)
%cmp1 = icmp slt i64 %max.09, %0
%spec.select7 = select i1 %cmp1, i64 %indvars.iv, i64 %idx.011
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond.not = icmp eq i64 %indvars.iv.next, %n
br i1 %exitcond.not, label %exit, label %for.body
exit:
store i64 %1, ptr %res_max
ret i64 %spec.select7
}
; Check if it is a min/max with index (MMI) pattern when the
; min/max value is not used outside the loop.
;
; Currently, the vectorizer checks if smax value is used outside
; the loop. However, even if only the index part has external users,
; and smax itself does not have external users, it can still form a
; MMI pattern.
;
define i64 @smax_idx_max_no_exit_user(ptr nocapture readonly %a, i64 %mm, i64 %ii, i64 %n) {
; CHECK-LABEL: @smax_idx_max_no_exit_user(
; CHECK-NOT: vector.body:
;
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%max.09 = phi i64 [ %mm, %entry ], [ %1, %for.body ]
%idx.011 = phi i64 [ %ii, %entry ], [ %spec.select7, %for.body ]
%arrayidx = getelementptr inbounds i64, ptr %a, i64 %indvars.iv
%0 = load i64, ptr %arrayidx
%1 = tail call i64 @llvm.smax.i64(i64 %max.09, i64 %0)
%cmp1 = icmp slt i64 %max.09, %0
%spec.select7 = select i1 %cmp1, i64 %indvars.iv, i64 %idx.011
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond.not = icmp eq i64 %indvars.iv.next, %n
br i1 %exitcond.not, label %exit, label %for.body
exit:
; %1 has no external users
ret i64 %spec.select7
}
; Check smax implemented by select(cmp()).
;
; Currently, MMI pattern does not support icmp with multiple users.
; TODO: It may be possible to reuse some of the methods in instcombine pass to
; check whether icmp can be duplicated.
;
define i64 @smax_idx_select_cmp(ptr nocapture readonly %a, i64 %mm, i64 %ii, ptr nocapture writeonly %res_max, i64 %n) {
; CHECK-LABEL: @smax_idx_select_cmp(
; CHECK-NOT: vector.body:
;
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%max.09 = phi i64 [ %mm, %entry ], [ %spec.select, %for.body ]
%idx.011 = phi i64 [ %ii, %entry ], [ %spec.select7, %for.body ]
%arrayidx = getelementptr inbounds i64, ptr %a, i64 %indvars.iv
%0 = load i64, ptr %arrayidx
%cmp1 = icmp slt i64 %max.09, %0
%spec.select = select i1 %cmp1, i64 %0, i64 %max.09
%spec.select7 = select i1 %cmp1, i64 %indvars.iv, i64 %idx.011
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond.not = icmp eq i64 %indvars.iv.next, %n
br i1 %exitcond.not, label %exit, label %for.body
exit:
store i64 %spec.select, ptr %res_max
ret i64 %spec.select7
}
;
; Check sge case.
;
define i64 @smax_idx_inverted_pred(ptr nocapture readonly %a, i64 %mm, i64 %ii, ptr nocapture writeonly %res_max, i64 %n) {
; CHECK-LABEL: @smax_idx_inverted_pred(
; CHECK-NOT: vector.body:
;
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%max.09 = phi i64 [ %mm, %entry ], [ %1, %for.body ]
%idx.011 = phi i64 [ %ii, %entry ], [ %spec.select7, %for.body ]
%arrayidx = getelementptr inbounds i64, ptr %a, i64 %indvars.iv
%0 = load i64, ptr %arrayidx
%1 = tail call i64 @llvm.smax.i64(i64 %max.09, i64 %0)
%cmp1 = icmp sge i64 %0, %max.09
%spec.select7 = select i1 %cmp1, i64 %indvars.iv, i64 %idx.011
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond.not = icmp eq i64 %indvars.iv.next, %n
br i1 %exitcond.not, label %exit, label %for.body
exit:
store i64 %1, ptr %res_max
ret i64 %spec.select7
}
;
; In such cases, the last index should be extracted.
;
define i64 @smax_idx_extract_last(ptr nocapture readonly %a, i64 %mm, i64 %ii, ptr nocapture writeonly %res_max, i64 %n) {
; CHECK-LABEL: @smax_idx_extract_last(
; CHECK-NOT: vector.body:
;
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%max.09 = phi i64 [ %mm, %entry ], [ %1, %for.body ]
%idx.011 = phi i64 [ %ii, %entry ], [ %spec.select7, %for.body ]
%arrayidx = getelementptr inbounds i64, ptr %a, i64 %indvars.iv
%0 = load i64, ptr %arrayidx
%1 = tail call i64 @llvm.smax.i64(i64 %max.09, i64 %0)
%cmp1.not = icmp sgt i64 %max.09, %0
%spec.select7 = select i1 %cmp1.not, i64 %idx.011, i64 %indvars.iv
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond.not = icmp eq i64 %indvars.iv.next, %n
br i1 %exitcond.not, label %exit, label %for.body
exit:
store i64 %1, ptr %res_max
ret i64 %spec.select7
}
;
; The operands of smax intrinsic and icmp are not the same to be recognized as MMI.
;
define i64 @smax_idx_not_vec_1(ptr nocapture readonly %a, ptr nocapture readonly %b, i64 %mm, i64 %ii, ptr nocapture writeonly %res_max, i64 %n) {
; CHECK-LABEL: @smax_idx_not_vec_1(
; CHECK-NOT: vector.body:
;
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%max.09 = phi i64 [ %mm, %entry ], [ %2, %for.body ]
%idx.011 = phi i64 [ %ii, %entry ], [ %spec.select7, %for.body ]
%arrayidx = getelementptr inbounds i64, ptr %a, i64 %indvars.iv
%0 = load i64, ptr %arrayidx
%arrayidx.01 = getelementptr inbounds i64, ptr %b, i64 %indvars.iv
%1 = load i64, ptr %arrayidx
%2 = tail call i64 @llvm.smax.i64(i64 %max.09, i64 %0)
%cmp1 = icmp slt i64 %max.09, %1
%spec.select7 = select i1 %cmp1, i64 %indvars.iv, i64 %idx.011
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond.not = icmp eq i64 %indvars.iv.next, %n
br i1 %exitcond.not, label %exit, label %for.body
exit:
store i64 %2, ptr %res_max
ret i64 %spec.select7
}
;
; It cannot be recognized as MMI when the operand of index select is not an induction variable.
;
define i64 @smax_idx_not_vec_2(ptr nocapture readonly %a, i64 %mm, i64 %ii, ptr nocapture writeonly %res_max, i64 %n) {
; CHECK-LABEL: @smax_idx_not_vec_2(
; CHECK-NOT: vector.body:
;
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%max.09 = phi i64 [ %mm, %entry ], [ %1, %for.body ]
%idx.011 = phi i64 [ %ii, %entry ], [ %spec.select7, %for.body ]
%arrayidx = getelementptr inbounds i64, ptr %a, i64 %indvars.iv
%0 = load i64, ptr %arrayidx
%1 = tail call i64 @llvm.smax.i64(i64 %max.09, i64 %0)
%cmp1 = icmp slt i64 %max.09, %0
%spec.select7 = select i1 %cmp1, i64 123, i64 %idx.011
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond.not = icmp eq i64 %indvars.iv.next, %n
br i1 %exitcond.not, label %exit, label %for.body
exit:
store i64 %1, ptr %res_max
ret i64 %spec.select7
}
declare i64 @llvm.smax.i64(i64, i64)
|