Viewing file:  bb-slp-pr81635-4.c (1.23 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-additional-options "-fno-tree-loop-vectorize" } */
/* { dg-require-effective-target lp64 } */
void
f1 (double *p, double *q, unsigned int n)
{
p = (double *) __builtin_assume_aligned (p, sizeof (double) * 2);
q = (double *) __builtin_assume_aligned (q, sizeof (double) * 2);
for (unsigned int i = 0; i < n; i += 1)
{
double a = q[i] + p[i];
double b = q[i + 1] + p[i + 1];
q[i] = a;
q[i + 1] = b;
}
}
void
f2 (double *p, double *q, unsigned int n)
{
p = (double *) __builtin_assume_aligned (p, sizeof (double) * 2);
q = (double *) __builtin_assume_aligned (q, sizeof (double) * 2);
for (unsigned int i = 0; i < n; i += 3)
{
double a = q[i] + p[i];
double b = q[i + 1] + p[i + 1];
q[i] = a;
q[i + 1] = b;
}
}
void
f3 (double *p, double *q, unsigned int start, unsigned int n)
{
p = (double *) __builtin_assume_aligned (p, sizeof (double) * 2);
q = (double *) __builtin_assume_aligned (q, sizeof (double) * 2);
for (unsigned int i = start; i < n; i += 2)
{
double a = q[i] + p[i];
double b = q[i + 1] + p[i + 1];
q[i] = a;
q[i + 1] = b;
}
}
/* { dg-final { scan-tree-dump-not "optimized: basic block" "slp1" } } */
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