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

#include <stdarg.h>

#include "tree-vect.h"

#define N 64

#define DOT1 43680

#define DOT2 43680

#define DOT3 43680

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

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

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

   Detected as a dot-product pattern.

   Should be vectorized on targets that support dot-product for unsigned chars.

   */

unsigned int

foo1(int len) {

  int i;

  unsigned int result = 0;

  unsigned short prod;

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

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

    result += prod;

  }

  return result;

}

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

   Detected as a dot-product pattern.

   Should be vectorized on targets that support dot-product for unsigned chars.

   This test currently fails to vectorize on targets that support dot-product

   of chars only when the accumulator is int.

   */

unsigned short

foo2(int len) {

  int i;

  unsigned short result = 0;

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

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

  }

  return result;

}

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

   Not detected as a dot-product.

   Doesn't get vectorized due to presence of type converisons.  */

unsigned int

foo3(int len) {

  int i;

  unsigned int result = 0;

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

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

  }

  return result;

}

int main (void)

{

  unsigned int dot1, dot3;

  unsigned short dot2;

  int i;

  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 the vectorizer is enhanced to vectorize foo2 (accumulation into short) for

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

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

*/

/* { 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_udot_qi } } } */

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