blob: e548416162a21dbd8bd27dc54c238bb32d6832fa (
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
|
/* { dg-do compile } */
/* { dg-options "-O3 -mtune=neoverse-n2 -mcpu=neoverse-n1 -fdump-tree-vect-details --param aarch64-vect-unroll-limit=2" } */
/* { dg-final { scan-tree-dump "Choosing vector mode V8HI" "vect" } } */
/* { dg-final { scan-tree-dump "Choosing epilogue vector mode V8QI" "vect" } } */
/* Do not increase the the vector factor of the epilog vectorized loop
for a loop with suggested_unroll_factor > 1.
before (suggested_unroll_factor=1):
if N >= 16:
main vect loop
if N >= 8:
epilog vect loop
scalar code
before (suggested_unroll_factor=2):
if N >= 32:
main vect loop
if N >= 16: // May fail to execute vectorized code (e.g. N is 8)
epilog vect loop
scalar code
after (suggested_unroll_factor=2):
if N >= 32:
main vect loop
if N >= 8: // The same VF as suggested_unroll_factor=1
epilog vect loop
scalar code */
int
foo (short *A, char *B, int N)
{
int sum = 0;
for (int i = 0; i < N; ++i)
sum += A[i] * B[i];
return sum;
}
|
