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
259
260
261
262
263
264
265
266
267
|
; RUN: opt -S -loop-vectorize -force-vector-interleave=1 -force-vector-width=2 < %s 2>&1 | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32-S128"
@f = common global i32 0, align 4
@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1
@c = common global i32 0, align 4
@a = common global i32 0, align 4
@b = common global i32 0, align 4
@e = common global i32 0, align 4
; It has a value that is used outside of the loop
; and is not a recognized reduction variable "tmp17".
; However, tmp17 is a non-header phi which is an allowed exit.
; CHECK-LABEL: @test1(
; CHECK: %vec.ind = phi <2 x i32>
; CHECK: [[CMP:%[a-zA-Z0-9.]+]] = icmp sgt <2 x i32> %vec.ind, <i32 10, i32 10>
; CHECK: %predphi = select <2 x i1> [[CMP]], <2 x i32> <i32 1, i32 1>, <2 x i32> zeroinitializer
; CHECK-LABEL: middle.block:
; CHECK: [[E1:%[a-zA-Z0-9.]+]] = extractelement <2 x i32> %predphi, i32 1
; CHECK-LABEL: f1.exit.loopexit:
; CHECK: %.lcssa = phi i32 [ %tmp17, %bb16 ], [ [[E1]], %middle.block ]
define i32 @test1() {
bb:
%b.promoted = load i32, i32* @b, align 4
br label %.lr.ph.i
.lr.ph.i:
%tmp8 = phi i32 [ %tmp18, %bb16 ], [ %b.promoted, %bb ]
%tmp2 = icmp sgt i32 %tmp8, 10
br i1 %tmp2, label %bb16, label %bb10
bb10:
br label %bb16
bb16:
%tmp17 = phi i32 [ 0, %bb10 ], [ 1, %.lr.ph.i ]
%tmp18 = add nsw i32 %tmp8, 1
%tmp19 = icmp slt i32 %tmp18, 4
br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit
f1.exit.loopexit:
%.lcssa = phi i32 [ %tmp17, %bb16 ]
ret i32 %.lcssa
}
; non-hdr phi depends on header phi.
; CHECK-LABEL: @test2(
; CHECK: %vec.ind = phi <2 x i32>
; CHECK: [[CMP:%[a-zA-Z0-9.]+]] = icmp sgt <2 x i32> %vec.ind, <i32 10, i32 10>
; CHECK: %predphi = select <2 x i1> [[CMP]], <2 x i32> <i32 1, i32 1>, <2 x i32> %vec.ind
; CHECK-LABEL: middle.block:
; CHECK: [[E1:%[a-zA-Z0-9.]+]] = extractelement <2 x i32> %predphi, i32 1
; CHECK-LABEL: f1.exit.loopexit:
; CHECK: %.lcssa = phi i32 [ %tmp17, %bb16 ], [ [[E1]], %middle.block ]
define i32 @test2() {
bb:
%b.promoted = load i32, i32* @b, align 4
br label %.lr.ph.i
.lr.ph.i:
%tmp8 = phi i32 [ %tmp18, %bb16 ], [ %b.promoted, %bb ]
%tmp2 = icmp sgt i32 %tmp8, 10
br i1 %tmp2, label %bb16, label %bb10
bb10:
br label %bb16
bb16:
%tmp17 = phi i32 [ %tmp8, %bb10 ], [ 1, %.lr.ph.i ]
%tmp18 = add nsw i32 %tmp8, 1
%tmp19 = icmp slt i32 %tmp18, 4
br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit
f1.exit.loopexit:
%.lcssa = phi i32 [ %tmp17, %bb16 ]
ret i32 %.lcssa
}
; more than 2 incoming values for tmp17 phi that is used outside loop.
; CHECK-LABEL: test3(
; CHECK-LABEL: vector.body:
; CHECK: %predphi = select <2 x i1> %{{.*}}, <2 x i32> <i32 1, i32 1>, <2 x i32> zeroinitializer
; CHECK: %predphi1 = select <2 x i1> %{{.*}}, <2 x i32> <i32 2, i32 2>, <2 x i32> %predphi
; CHECK-LABEL: middle.block:
; CHECK: [[E1:%[a-zA-Z0-9.]+]] = extractelement <2 x i32> %predphi1, i32 1
; CHECK-LABEL: f1.exit.loopexit:
; CHECK: phi i32 [ %tmp17, %bb16 ], [ [[E1]], %middle.block ]
define i32 @test3(i32 %N) {
bb:
%b.promoted = load i32, i32* @b, align 4
br label %.lr.ph.i
.lr.ph.i:
%tmp8 = phi i32 [ %tmp18, %bb16 ], [ %b.promoted, %bb ]
%tmp2 = icmp sgt i32 %tmp8, 10
br i1 %tmp2, label %bb16, label %bb10
bb10:
%cmp = icmp sgt i32 %tmp8, %N
br i1 %cmp, label %bb12, label %bb16
bb12:
br label %bb16
bb16:
%tmp17 = phi i32 [ 0, %bb10 ], [ 1, %.lr.ph.i ], [ 2, %bb12 ]
%tmp18 = add nsw i32 %tmp8, 1
%tmp19 = icmp slt i32 %tmp18, 4
br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit
f1.exit.loopexit:
%.lcssa = phi i32 [ %tmp17, %bb16 ]
ret i32 %.lcssa
}
; more than one incoming value for outside user: %.lcssa
; CHECK-LABEL: test4(
; CHECK-LABEL: vector.body:
; CHECK: %predphi = select <2 x i1>
; CHECK-LABEL: middle.block:
; CHECK: [[E1:%[a-zA-Z0-9.]+]] = extractelement <2 x i32> %predphi, i32 1
; CHECK-LABEL: f1.exit.loopexit.loopexit:
; CHECK: %tmp17.lcssa = phi i32 [ %tmp17, %bb16 ], [ [[E1]], %middle.block ]
; CHECK-NEXT: br label %f1.exit.loopexit
; CHECK-LABEL: f1.exit.loopexit:
; CHECK: %.lcssa = phi i32 [ 2, %bb ], [ %tmp17.lcssa, %f1.exit.loopexit.loopexit ]
define i32 @test4(i32 %N) {
bb:
%b.promoted = load i32, i32* @b, align 4
%icmp = icmp slt i32 %b.promoted, %N
br i1 %icmp, label %f1.exit.loopexit, label %.lr.ph.i
.lr.ph.i:
%tmp8 = phi i32 [ %tmp18, %bb16 ], [ %b.promoted, %bb ]
%tmp2 = icmp sgt i32 %tmp8, 10
br i1 %tmp2, label %bb16, label %bb10
bb10:
br label %bb16
bb16:
%tmp17 = phi i32 [ 0, %bb10 ], [ 1, %.lr.ph.i ]
%tmp18 = add nsw i32 %tmp8, 1
%tmp19 = icmp slt i32 %tmp18, 4
br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit
f1.exit.loopexit:
%.lcssa = phi i32 [ %tmp17, %bb16 ], [ 2, %bb ]
ret i32 %.lcssa
}
; non hdr phi that depends on reduction and is used outside the loop.
; reduction phis are only allowed to have bump or reduction operations as the inside user, so we should
; not vectorize this.
; CHECK-LABEL: reduction_sum(
; CHECK-NOT: <2 x i32>
define i32 @reduction_sum(i32 %n, i32* noalias nocapture %A, i32* noalias nocapture %B) nounwind uwtable readonly noinline ssp {
entry:
%c1 = icmp sgt i32 %n, 0
br i1 %c1, label %header, label %._crit_edge
header: ; preds = %0, %.lr.ph
%indvars.iv = phi i64 [ %indvars.iv.next, %bb16 ], [ 0, %entry ]
%sum.02 = phi i32 [ %c9, %bb16 ], [ 0, %entry ]
%c2 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
%c3 = load i32, i32* %c2, align 4
%c4 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv
%c5 = load i32, i32* %c4, align 4
%tmp2 = icmp sgt i32 %sum.02, 10
br i1 %tmp2, label %bb16, label %bb10
bb10:
br label %bb16
bb16:
%tmp17 = phi i32 [ %sum.02, %bb10 ], [ 1, %header ]
%c6 = trunc i64 %indvars.iv to i32
%c7 = add i32 %sum.02, %c6
%c8 = add i32 %c7, %c3
%c9 = add i32 %c8, %c5
%indvars.iv.next = add i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, %n
br i1 %exitcond, label %._crit_edge, label %header
._crit_edge: ; preds = %.lr.ph, %0
%sum.0.lcssa = phi i32 [ 0, %entry ], [ %c9, %bb16 ]
%nonhdr.lcssa = phi i32 [ 1, %entry], [ %tmp17, %bb16 ]
ret i32 %sum.0.lcssa
}
; invalid cyclic dependency with header phi iv, which prevents iv from being
; recognized as induction var.
; cannot vectorize.
; CHECK-LABEL: cyclic_dep_with_indvar(
; CHECK-NOT: <2 x i32>
define i32 @cyclic_dep_with_indvar() {
bb:
%b.promoted = load i32, i32* @b, align 4
br label %.lr.ph.i
.lr.ph.i:
%iv = phi i32 [ %ivnext, %bb16 ], [ %b.promoted, %bb ]
%tmp2 = icmp sgt i32 %iv, 10
br i1 %tmp2, label %bb16, label %bb10
bb10:
br label %bb16
bb16:
%tmp17 = phi i32 [ 0, %bb10 ], [ %iv, %.lr.ph.i ]
%ivnext = add nsw i32 %tmp17, 1
%tmp19 = icmp slt i32 %ivnext, 4
br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit
f1.exit.loopexit:
%.lcssa = phi i32 [ %tmp17, %bb16 ]
ret i32 %.lcssa
}
; non-reduction phi 'tmp17' used outside loop has cyclic dependence with %x.05 phi
; cannot vectorize.
; CHECK-LABEL: not_valid_reduction(
; CHECK-NOT: <2 x i32>
define i32 @not_valid_reduction(i32 %n, i32* noalias nocapture %A) nounwind uwtable readonly {
entry:
%cmp4 = icmp sgt i32 %n, 0
br i1 %cmp4, label %for.body, label %for.end
for.body: ; preds = %entry, %for.body
%indvars.iv = phi i64 [ %indvars.iv.next, %latch ], [ 0, %entry ]
%x.05 = phi i32 [ %tmp17, %latch ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
%tmp0 = load i32, i32* %arrayidx, align 4
%tmp2 = icmp sgt i64 %indvars.iv, 10
%sub = sub nsw i32 %x.05, %tmp0
br i1 %tmp2, label %bb16, label %bb10
bb10:
br label %bb16
bb16:
%tmp17 = phi i32 [ 1, %bb10 ], [ %sub, %for.body ]
br label %latch
latch:
%indvars.iv.next = add i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, %n
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body, %entry
%x.0.lcssa = phi i32 [ 0, %entry ], [ %tmp17 , %latch ]
ret i32 %x.0.lcssa
}
|
