blob: d2791e071c38ee9c86b992adf24cd49f91d7ff71 (
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
|
/* Test the attribute((optimize)) really works. Do this test by checking
whether we vectorize a simple loop. */
/* { dg-do compile } */
/* { dg-options "-O1 -msse2 -mfpmath=sse -march=k8" } */
/* { dg-final { scan-assembler "prefetcht0" } } */
/* { dg-final { scan-assembler "addps" } } */
/* { dg-final { scan-assembler "subss" } } */
#define SIZE 10240
float a[SIZE] __attribute__((__aligned__(32)));
float b[SIZE] __attribute__((__aligned__(32)));
float c[SIZE] __attribute__((__aligned__(32)));
/* This should vectorize. */
#pragma GCC push_options
#pragma GCC optimize (3, "unroll-all-loops", "-fprefetch-loop-arrays")
void
opt3 (void)
{
int i;
for (i = 0; i < SIZE; i++)
a[i] = b[i] + c[i];
}
#pragma GCC pop_options
/* This should not vectorize. */
void
not_opt3 (void)
{
int i;
for (i = 0; i < SIZE; i++)
a[i] = b[i] - c[i];
}
|
