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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-require-effective-target sse2 } */

/* { 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];

}