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
| ; RUN: opt -mtriple=aarch64--linux-gnueabi -loop-vectorize -force-vector-width=4 -force-vector-interleave=1 < %s -S | FileCheck %s
; The following tests contain loops for which SCEV cannot determine the backedge
; taken count. This is because the backedge taken condition is produced by an
; icmp with one of the sides being a loop varying non-AddRec expression.
; However, there is a possibility to normalize this to an AddRec expression
; using SCEV predicates. This allows us to compute a 'guarded' backedge count.
; The Loop Vectorizer is able to version to loop in order to use this guarded
; backedge count and vectorize more loops.
; CHECK-LABEL: test_sge
; CHECK-LABEL: vector.scevcheck
; CHECK-LABEL: vector.body
define void @test_sge(i32* noalias %A,
i32* noalias %B,
i32* noalias %C, i32 %N) {
entry:
%cmp13 = icmp eq i32 %N, 0
br i1 %cmp13, label %for.end, label %for.body.preheader
for.body.preheader:
br label %for.body
for.body:
%indvars.iv = phi i16 [ %indvars.next, %for.body ], [ 0, %for.body.preheader ]
%indvars.next = add i16 %indvars.iv, 1
%indvars.ext = zext i16 %indvars.iv to i32
%arrayidx = getelementptr inbounds i32, i32* %B, i32 %indvars.ext
%0 = load i32, i32* %arrayidx, align 4
%arrayidx3 = getelementptr inbounds i32, i32* %C, i32 %indvars.ext
%1 = load i32, i32* %arrayidx3, align 4
%mul4 = mul i32 %1, %0
%arrayidx7 = getelementptr inbounds i32, i32* %A, i32 %indvars.ext
store i32 %mul4, i32* %arrayidx7, align 4
%exitcond = icmp sge i32 %indvars.ext, %N
br i1 %exitcond, label %for.end.loopexit, label %for.body
for.end.loopexit:
br label %for.end
for.end:
ret void
}
; CHECK-LABEL: test_uge
; CHECK-LABEL: vector.scevcheck
; CHECK-LABEL: vector.body
define void @test_uge(i32* noalias %A,
i32* noalias %B,
i32* noalias %C, i32 %N, i32 %Offset) {
entry:
%cmp13 = icmp eq i32 %N, 0
br i1 %cmp13, label %for.end, label %for.body.preheader
for.body.preheader:
br label %for.body
for.body:
%indvars.iv = phi i16 [ %indvars.next, %for.body ], [ 0, %for.body.preheader ]
%indvars.next = add i16 %indvars.iv, 1
%indvars.ext = sext i16 %indvars.iv to i32
%indvars.access = add i32 %Offset, %indvars.ext
%arrayidx = getelementptr inbounds i32, i32* %B, i32 %indvars.access
%0 = load i32, i32* %arrayidx, align 4
%arrayidx3 = getelementptr inbounds i32, i32* %C, i32 %indvars.access
%1 = load i32, i32* %arrayidx3, align 4
%mul4 = add i32 %1, %0
%arrayidx7 = getelementptr inbounds i32, i32* %A, i32 %indvars.access
store i32 %mul4, i32* %arrayidx7, align 4
%exitcond = icmp uge i32 %indvars.ext, %N
br i1 %exitcond, label %for.end.loopexit, label %for.body
for.end.loopexit:
br label %for.end
for.end:
ret void
}
; CHECK-LABEL: test_ule
; CHECK-LABEL: vector.scevcheck
; CHECK-LABEL: vector.body
define void @test_ule(i32* noalias %A,
i32* noalias %B,
i32* noalias %C, i32 %N,
i16 %M) {
entry:
%cmp13 = icmp eq i32 %N, 0
br i1 %cmp13, label %for.end, label %for.body.preheader
for.body.preheader:
br label %for.body
for.body:
%indvars.iv = phi i16 [ %indvars.next, %for.body ], [ %M, %for.body.preheader ]
%indvars.next = sub i16 %indvars.iv, 1
%indvars.ext = zext i16 %indvars.iv to i32
%arrayidx = getelementptr inbounds i32, i32* %B, i32 %indvars.ext
%0 = load i32, i32* %arrayidx, align 4
%arrayidx3 = getelementptr inbounds i32, i32* %C, i32 %indvars.ext
%1 = load i32, i32* %arrayidx3, align 4
%mul4 = mul i32 %1, %0
%arrayidx7 = getelementptr inbounds i32, i32* %A, i32 %indvars.ext
store i32 %mul4, i32* %arrayidx7, align 4
%exitcond = icmp ule i32 %indvars.ext, %N
br i1 %exitcond, label %for.end.loopexit, label %for.body
for.end.loopexit:
br label %for.end
for.end:
ret void
}
; CHECK-LABEL: test_sle
; CHECK-LABEL: vector.scevcheck
; CHECK-LABEL: vector.body
define void @test_sle(i32* noalias %A,
i32* noalias %B,
i32* noalias %C, i32 %N,
i16 %M) {
entry:
%cmp13 = icmp eq i32 %N, 0
br i1 %cmp13, label %for.end, label %for.body.preheader
for.body.preheader:
br label %for.body
for.body:
%indvars.iv = phi i16 [ %indvars.next, %for.body ], [ %M, %for.body.preheader ]
%indvars.next = sub i16 %indvars.iv, 1
%indvars.ext = sext i16 %indvars.iv to i32
%arrayidx = getelementptr inbounds i32, i32* %B, i32 %indvars.ext
%0 = load i32, i32* %arrayidx, align 4
%arrayidx3 = getelementptr inbounds i32, i32* %C, i32 %indvars.ext
%1 = load i32, i32* %arrayidx3, align 4
%mul4 = mul i32 %1, %0
%arrayidx7 = getelementptr inbounds i32, i32* %A, i32 %indvars.ext
store i32 %mul4, i32* %arrayidx7, align 4
%exitcond = icmp sle i32 %indvars.ext, %N
br i1 %exitcond, label %for.end.loopexit, label %for.body
for.end.loopexit:
br label %for.end
for.end:
ret void
}
|