Subversion Repositories openrisc_2011-10-31

/* { dg-require-effective-target vect_int } */

#include <stdarg.h>

#include "tree-vect.h"

#define N 64

#define DOT1 43680

#define DOT2 -21856

#define DOT3 43680

signed char X[N] __attribute__ ((__aligned__(16)));

signed char Y[N] __attribute__ ((__aligned__(16)));

/* char->short->int dot product.

   The dot-product pattern should be detected.

   Vectorizable on vect_sdot_qi targets (targets that support dot-product of

   signed chars).

   In the future could also be vectorized as widening-mult + widening-summation,

   or with type-conversion support.

 */

int

foo1(int len) {

  int i;

  int result = 0;

  short prod;

  for (i=0; i<len; i++) {

    prod = X[i] * Y[i];

    result += prod;

  }

  return result;

}

/* 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 when the accumulator is int.

   In the future could also be vectorized as widening-mult + summation,

   or with type-conversion support.

 */

short

foo2(int len) {

  int i;

  short result = 0;

  for (i=0; i<len; i++) {

    result += (X[i] * Y[i]);

  }

  return result;

}

/* char->int->int dot product.

   Not detected as a dot-product pattern.

   Currently fails to be vectorized due to presence of type conversions. */

int

foo3(int len) {

  int i;

  int result = 0;

  for (i=0; i<len; i++) {

    result += (X[i] * Y[i]);

  }

  return result;

}

int main (void)

{

  int i, dot1, dot3;

  short dot2;

  check_vect ();

  for (i=0; i<N; i++) {

    X[i] = i;

    Y[i] = 64-i;

  }

  dot1 = foo1 (N);

  if (dot1 != DOT1)

    abort ();

  dot2 = foo2 (N);

  if (dot2 != DOT2)

    abort ();

  dot3 = foo3 (N);

  if (dot3 != DOT3)

    abort ();

  return 0;

}

/* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 2 "vect" } } */

/* When vectorizer is enhanced to vectorize foo2 (accumulation into short) for targets

   that support accumulation into int (ia64) we'd have:

dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { target vect_sdot_qi } }

*/

/* In the meantime expect: */

/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { xfail *-*-* } } } */

/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_sdot_qi } } } */

/* { dg-final { cleanup-tree-dump "vect" } } */