Viewing file:  bb-slp-pr81635-2.c (1.58 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-additional-options "-fno-tree-loop-vectorize" } */
/* { dg-require-effective-target lp64 } */
double p[1000];
double q[1000];
void
f1 (double *p, double *q)
{
p = (double *) __builtin_assume_aligned (p, sizeof (double) * 2);
q = (double *) __builtin_assume_aligned (q, sizeof (double) * 2);
for (unsigned int i = 2; i < ~0U - 4; i += 4)
{
double a = q[i + 2] + p[i + 2];
double b = q[i + 3] + p[i + 3];
q[i + 2] = a;
q[i + 3] = b;
}
}
void
f2 (double *p, double *q)
{
p = (double *) __builtin_assume_aligned (p, sizeof (double) * 2);
q = (double *) __builtin_assume_aligned (q, sizeof (double) * 2);
for (unsigned int i = 0; i < ~0U - 3; i += 4)
{
double a = q[i + 4] + p[i + 4];
double b = q[i + 5] + p[i + 5];
q[i + 4] = a;
q[i + 5] = b;
}
}
void
f3 (double *p, double *q)
{
p = (double *) __builtin_assume_aligned (p, sizeof (double) * 2);
q = (double *) __builtin_assume_aligned (q, sizeof (double) * 2);
for (unsigned int i = 0; i < 1000; i += 4)
{
double a = q[i - 2] + p[i - 2];
double b = q[i - 1] + p[i - 1];
q[i - 2] = a;
q[i - 1] = b;
}
}
void
f4 (double *p, double *q)
{
p = (double *) __builtin_assume_aligned (p, sizeof (double) * 2);
q = (double *) __builtin_assume_aligned (q, sizeof (double) * 2);
for (unsigned int i = 2; i < 1000; i += 4)
{
double a = q[i - 4] + p[i - 4];
double b = q[i - 3] + p[i - 3];
q[i - 4] = a;
q[i - 3] = b;
}
}
/* { dg-final { scan-tree-dump-not "optimized: basic block" "slp1" } } */
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