Viewing file:  vect-fmax-3.c (1.82 KB) -rw-r--r--
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#include "tree-vect.h"
void __attribute__((noipa))
test (double x0, double x1, double *restrict res, double *restrict ptr, int n)
{
for (int i = 0; i < n; i += 2)
{
x0 = __builtin_fmax (x0, ptr[i + 0]);
x1 = __builtin_fmax (x1, ptr[i + 1]);
}
res[0] = x0;
res[1] = x1;
}
#define N 128
#define HALF (N / 2)
int
main (void)
{
check_vect ();
double res[2], a[N];
for (int i = 0; i < N; i += 2)
{
a[i] = i < HALF ? i : HALF;
a[i + 1] = i / 8;
}
test (-1, -1, res, a, 2);
if (res[0] != 0 || res[1] != 0)
__builtin_abort ();
test (-1, -1, res, a, 6);
if (res[0] != 4 || res[1] != 0)
__builtin_abort ();
test (-1, -1, res, a, 8);
if (res[0] != 6 || res[1] != 0)
__builtin_abort ();
test (-1, -1, res, a, 10);
if (res[0] != 8 || res[1] != 1)
__builtin_abort ();
test (-1, -1, res, a, HALF - 2);
if (res[0] != HALF - 4 || res[1] != HALF / 8 - 1)
__builtin_abort ();
test (-1, -1, res, a, HALF);
if (res[0] != HALF - 2 || res[1] != HALF / 8 - 1)
__builtin_abort ();
test (-1, -1, res, a, HALF + 2);
if (res[0] != HALF || res[1] != HALF / 8)
__builtin_abort ();
test (-1, -1, res, a, HALF + 8);
if (res[0] != HALF || res[1] != HALF / 8)
__builtin_abort ();
test (-1, -1, res, a, HALF + 10);
if (res[0] != HALF || res[1] != HALF / 8 + 1)
__builtin_abort ();
test (-1, -1, res, a, N);
if (res[0] != HALF || res[1] != N / 8 - 1)
__builtin_abort ();
test (HALF + 1, -1, res, a, N);
if (res[0] != HALF + 1 || res[1] != N / 8 - 1)
__builtin_abort ();
test (HALF + 1, N, res, a, N);
if (res[0] != HALF + 1 || res[1] != N)
__builtin_abort ();
return 0;
}
/* { dg-final { scan-tree-dump "Detected reduction" "vect" } } */
/* { dg-final { scan-tree-dump "LOOP VECTORIZED" "vect" { target vect_max_reduc } } } */
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