blob: 1ec195c5352bd5ef2fc17df0ef1453bcfddd55de (
plain)
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
|
/* { dg-do compile } */
/* { dg-require-effective-target vect_int } */
/* { dg-require-effective-target vect_float } */
#define N 16
void fbar (float *);
void ibar (int *);
void sbar (short *);
/* multiple loops */
foo (int n)
{
float a[N+1];
float b[N];
float c[N];
float d[N];
int ia[N];
int ib[N];
int ic[N];
int i,j;
int diff = 0;
char cb[N];
char cc[N];
char image[N][N];
char block[N][N];
/* Not vectorizable yet (cross-iteration cycle). */
diff = 0;
for (i = 0; i < N; i++) {
diff += (cb[i] - cc[i]);
}
ibar (&diff);
/* Not vectorizable yet (outer-loop: not attempted.
inner-loop: cross iteration cycle; multi-dimensional arrays). */
diff = 0;
for (i = 0; i < N; i++) {
for (i = 0; i < N; i++) {
diff += (image[i][j] - block[i][j]);
}
}
ibar (&diff);
/* Vectorizable. */
for (i = 0; i < N; i++){
a[i] = b[i];
}
fbar (a);
/* Vectorizable. */
for (i = 0; i < N; i++){
a[i] = b[i] + c[i] + d[i];
}
fbar (a);
/* Strided access. Vectorizable on platforms that support load of strided
accesses (extract of even/odd vector elements). */
for (i = 0; i < N/2; i++){
a[i] = b[2*i+1] * c[2*i+1] - b[2*i] * c[2*i];
d[i] = b[2*i] * c[2*i+1] + b[2*i+1] * c[2*i];
}
fbar (a);
/* Vectorizable. */
for (i = 0; i < N; i++){
a[i] = b[i] + c[i];
d[i] = b[i] + c[i];
ia[i] = ib[i] + ic[i];
}
ibar (ia);
fbar (a);
fbar (d);
/* Not vetorizable yet (too conservative dependence test). */
for (i = 0; i < N; i++){
a[i] = b[i] + c[i];
a[i+1] = b[i] + c[i];
}
fbar (a);
}
/* { dg-final { scan-tree-dump-times "vectorized 4 loops" 1 "vect" { target vect_extract_even_odd } } } */
/* { dg-final { scan-tree-dump-times "vectorized 3 loops" 1 "vect" { xfail vect_extract_even_odd } } } */
/* { dg-final { cleanup-tree-dump "vect" } } */
|
