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/* 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. */
void opt3 (void) __attribute__((__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];
}
/* This should not vectorize. */
void
not_opt3 (void)
{
int i;
for (i = 0; i < SIZE; i++)
a[i] = b[i] - c[i];
}
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