1/* Test the attribute((optimize)) really works.  Do this test by checking
2   whether we vectorize a simple loop.  */
3/* { dg-do compile } */
4/* { dg-options "-O1 -msse2 -mfpmath=sse -march=k8" } */
5/* { dg-require-effective-target sse2 } */
6/* { dg-final { scan-assembler "prefetcht0" } } */
7/* { dg-final { scan-assembler "addps" } } */
8/* { dg-final { scan-assembler "subss" } } */
9
10#define SIZE 10240
11float a[SIZE] __attribute__((__aligned__(32)));
12float b[SIZE] __attribute__((__aligned__(32)));
13float c[SIZE] __attribute__((__aligned__(32)));
14
15/* This should vectorize.  */
16void opt3 (void) __attribute__((__optimize__(3,"unroll-all-loops,-fprefetch-loop-arrays")));
17
18void
19opt3 (void)
20{
21  int i;
22
23  for (i = 0; i < SIZE; i++)
24    a[i] = b[i] + c[i];
25}
26
27/* This should not vectorize.  */
28void
29not_opt3 (void)
30{
31  int i;
32
33  for (i = 0; i < SIZE; i++)
34    a[i] = b[i] - c[i];
35}
36
37