Viewing file:  slp-reduc-3.c (1.95 KB) -rw-r--r--
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/* { dg-require-effective-target vect_int } */
/* { dg-additional-options "--param=vect-epilogues-nomask=0" } */
#include <stdarg.h>
#include "tree-vect.h"
#define N 64
#define DOT1 21834
#define DOT2 21876
unsigned short X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
unsigned short Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
/* short->short->int dot product.
Not detected as a dot-product pattern.
Requires support for non-widneing multiplication and widening-summation.
Vectorized with loop-aware SLP. */
__attribute__ ((noinline)) unsigned int
foo1(int len, int *result1, int *result2)
{
int i;
unsigned int res1 = 10, res2 = 20;
unsigned short prod;
for (i=0; i<len; i++) {
prod = X[2*i] * Y[2*i];
res1 += prod;
prod = X[2*i+1] * Y[2*i+1];
res2 += prod;
}
*result1 = res1;
*result2 = res2;
return 0;
}
int main (void)
{
unsigned int dot1, dot2;
unsigned short i;
check_vect ();
for (i=0; i<N; i++) {
X[i] = i;
Y[i] = 64-i;
asm volatile ("" ::: "memory");
}
foo1 (N/2, &dot1, &dot2);
if (dot1 != DOT1 || dot2 != DOT2)
abort ();
return 0;
}
/* The initialization loop in main also gets vectorized. */
/* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" { xfail *-*-* } } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_short_mult && { vect_widen_sum_hi_to_si && vect_unpack } } } } } */
/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { xfail { vect_widen_sum_hi_to_si_pattern || { ! { vect_short_mult && { vect_widen_sum_hi_to_si && vect_unpack } } } } } } } */
/* Check we can elide permutes if SLP vectorizing the reduction. */
/* { dg-final { scan-tree-dump-times "VEC_PERM_EXPR" 0 "vect" { xfail { { { vect_widen_sum_hi_to_si_pattern || { ! vect_unpack } } && { ! vect_load_lanes } } && { vect_short_mult && { vect_widen_sum_hi_to_si && vect_unpack } } } } } } */
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