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/* { dg-require-effective-target vect_int } */
#include <stdarg.h>
#include "tree-vect.h"
#define N 64
#define DOT -21856
signed char X[N] __attribute__ ((__aligned__(16)));
signed char Y[N] __attribute__ ((__aligned__(16)));
/* char->short->short dot product.
The dot-product pattern should be detected.
Should be vectorized on vect_sdot_qi targets (targets that support
dot-product of signed char).
This test currently fails to vectorize on targets that support
dot-product of chars into and int accumulator.
Can also be vectorized as widening-mult + summation,
or with type-conversion support.
*/
short
foo(int len) {
int i;
short result = 0;
for (i=0; i<len; i++) {
result += (X[i] * Y[i]);
}
return result;
}
int main (void)
{
int i;
short dot;
check_vect ();
for (i=0; i<N; i++) {
X[i] = i;
Y[i] = 64-i;
}
dot = foo (N);
if (dot != DOT)
abort ();
return 0;
}
/* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" } } */
/* { dg-final { scan-tree-dump-times "vect_recog_widen_mult_pattern: detected" 1 "vect" } } */
/* When vectorizer is enhanced to vectorize accumulation into short for targets
that support accumulation into int (e.g. ia64) we'd have:
dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_sdot_qi } }
*/
/* In the meantime expect: */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_widen_mult_qi_to_hi } } } */
/* { dg-final { cleanup-tree-dump "vect" } } */
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